Готові списки джерел за темами / Maximum power gain

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Добірка наукової літератури з теми "Maximum power gain"

Автор: Grafiati

Опубліковано: 9 листопада 2022

Оновлено: 4 березня 2023

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Статті в журналах з теми "Maximum power gain"

McGregor, J. M., and D. J. Roulston. "Transistor design for predictable power gain at maximum frequency." IEEE Transactions on Electron Devices 39, no. 2 (1992): 389–95. http://dx.doi.org/10.1109/16.121698.

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Bakos, J. S., P. N. Ignacz, and Z. Sorlei. "Role of power broadening in influencing maximum gain of far infrared gain material." IEEE Journal of Quantum Electronics 29, no. 7 (July 1993): 2220–24. http://dx.doi.org/10.1109/3.237496.

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Felinskyi, Georgii S., and Mykhailo Y. Dyriv. "Noise Gain Features of Fiber Raman Amplifier." Advances in OptoElectronics 2016 (July 12, 2016): 1–7. http://dx.doi.org/10.1155/2016/5843636.

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The formation dynamics of the optical noise in a silica single mode fiber (SMF) as function of the pump power variation in the counter pumped fiber Raman amplifier (FRA) is experimentally studied. The ratio between the power of amplified spontaneous emission and the power of incoherent optical noise is quantitatively determined by detailed analysis of experimental data in the pump powers range of 100–300 mW within the full band of Stokes frequencies, including FRA working wavelengths over the C + L transparency windows. It is found out the maximum of Raman gain coefficient for optical noise does not exceed ~60% of corresponding peak at the gain profile maximum of coherent signal. It is shown that the real FRA noise figure may be considerably less than 3 dB over a wide wavelength range (100 nm) at a pump power of several hundreds of mW.

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Tian, Hong Fang, Jian Bo Cao, and Zheng Xi Li. "The High-Gain Boost Converter for Maximum Power Point Tracking in Photovoltaic System." Advanced Materials Research 383-390 (November 2011): 2677–84. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.2677.

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The aim of this paper is to introduce a high-gain Boost circuit and to use the maximum power model to analyze the principles of maximum power point tracking (MPPT) in photovoltaic (PV) system .The principle is applied to the high-gain Boost circuit and control circuit, through a specific MPPT algorithm to change the duty cycle of Boost circuit realizes maximum power tracking and higher DC output voltage, the control circuit are formed by the CPLD and the AVR microcontroller, through which the control circuit to generate a varying duty cycle and 40KHz PWM pulse to control High-gain Boost circuit. Algorithm uses the incremental conductance method. Experiments show that maximum power point tracking effect is good.

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P, Bhavana. "Maximum Power Extraction in Low Power PV FED High Voltage Gain Boost Converter using Optimization Algorithm (PO & INC) by Limiting the Oscillations." Revista Gestão Inovação e Tecnologias 11, no. 4 (July 10, 2021): 1163–76. http://dx.doi.org/10.47059/revistageintec.v11i4.2176.

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Hu, Guanqu, Jinhui Cui, Fengjun Tian, Zhengxin Gao, Shixiong Yan, Sichen Liu, Xinlu Zhang, and Li Li. "Orthogonally Polarized Dual-Wavelength Gain-Switched Ho:LuLiF4 Pulse Laser." Photonics 10, no. 1 (January 6, 2023): 62. http://dx.doi.org/10.3390/photonics10010062.

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A compact, orthogonally polarized, gain-switched a-cut Ho:LuLiF4 laser with intra-cavity pumping by a self-Q-switched Tm:YAP laser is demonstrated here for the first time. The π-polarization laser at 2052 nm and σ-polarization laser at 2066 nm were experimentally observed with the maximum output power values of 299 mW and 126 mW, respectively, and the two polarization directions were always kept mutually orthogonal as the pump power increased. The ratio of the output power between the two orthogonal polarization lasers was nearly 1:1 at a pump power of 18.4 W. The minimum pulse width of the Ho:LLF laser was 326 ns, the maximum repetition rate was 24 kHz, and the maximum average energy was 28 μJ.

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Sahu, Pankaj, and Rajiv Dey. "Maximum power point tracking using adjustable gain based model reference adaptive control." Journal of Power Electronics 22, no. 1 (November 16, 2021): 138–50. http://dx.doi.org/10.1007/s43236-021-00336-3.

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G. SIVA, KUMAR, and DEVI A. LAKSHMI. "NEURO FUZZY GAIN SCHEDULER FOR MAXIMUM POWER TRACKING OF WIND DRIVEN DFIG." i-manager’s Journal on Electrical Engineering 13, no. 2 (2019): 33. http://dx.doi.org/10.26634/jee.13.2.15790.

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Umeda, Hiroyuki, Kenichiro Takahashi, and Yoshiaki Shiraga. "Maximum available power gain of microwave-transistor amplifier under large-signal operation." Electronics and Communications in Japan (Part II: Electronics) 71, no. 2 (1988): 40–52. http://dx.doi.org/10.1002/ecjb.4420710205.

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Ramiah, Harikrishnan, U. Eswaran, and J. Kanesan. "A high gain and high linearity class-AB power amplifier for WCDMA applications." Microelectronics International 31, no. 1 (December 20, 2013): 1–7. http://dx.doi.org/10.1108/mi-09-2012-0069.

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Purpose – The purpose of this paper is to design and realize a high gain power amplifier (PA) with low output back-off power using the InGaP/GaAs HBT process for WCDMA applications from 1.85 to 1.91 GHz. Design/methodology/approach – A three stages cascaded PA is designed which observes a high power gain. A 100 mA of quiescent current helps the PA to operate efficiently. The final stage device dimension has been selected diligently in order to deliver a high output power. The inter-stage match between the driver and main stage has been designed to provide maximum power transfer. The output matching network is constructed to deliver a high linear output power which meets the WCDMA adjacent channel leakage ratio (ACLR) requirement of −33 dBc close to the 1 dB gain compression point. Findings – With the cascaded topology, a maximum 31.3 dB of gain is achieved at 1.9 GHz. S11 of less than −18 dB is achieved across the operating frequency band. The maximum output power is indicated to be 32.7 dBm. An ACLR of −33 dBc is achieved at maximum linear output power of 31 dBm. Practical implications – The designed PA is an excellent candidate to be employed in the WCDMA transmitter chain without the aid of additional driver amplifier and linearization circuits. Originality/value – In this work, a fully integrated GaAs HBT PA has been implemented which is capable to operate linearly close to its 1 dB gain compression point.

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Більше джерел

Дисертації з теми "Maximum power gain"

Ndoye, Mamadou Mustapha. "Contribution à l'étude du transistor bipolaire hyperfréquence sur puce de silicium." Bordeaux 1, 1997. http://www.theses.fr/1997BOR10682.

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Ce travail est une contribution à l'étude du transistor bipolaire hyperfréquence sur puce de silicium. Il présente tout d’abord deux méthodes originales permettant de réduire la Capacité extrinsèque Base-Collecteur, d'augmenter la tension de claquage Base-Collecteur, d'augmenter la tension Early VA, d'augmenter le gain en puissance maximal Gpmax et d'augmenter la fréquence de transition FT. Il présente ensuite un nouveau transistor, de structure hybride entre le NPN vertical et le NPN latéral, baptisé bipolaire-CLEV (à Collecteur Latéral-Emetteur Vertical). Ce travail est généralisable à d'autres technologies de transistors hyperfréquences telles que les transistors à substrats III-V ou les transistors à hétérojonctions
This work is a contribution to the study of the high-speed bipolar transistor on silicon chip. First, it presents two original methods allowing to reduce the Base-Collector extrinsic Capacitance, to increase the Base-Collector breakdown voltage, to increase the Voltage Early VA, to increase the maximum power gain Gpmax and to increase the transition frequency FT. Then, it presents a new transistor, hybrid structure between the vertical NPN and the lateral NPN, named bipolar-CLEV (lateral collector-vertical emitter). This study can be generalized to other high speed transistor technologies such as III-V substrate transistors or heterojunction transistors

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Ndoye, Mamadou Moustapha. "Contribution à l'étude du transistor bipolaire hyperfréquence sur puce de silicium." Bordeaux 1, 1997. http://www.theses.fr/1997BOR10688.

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Lopez, Santos Oswaldo. "Contribution to the DC-AC conversion in photovoltaic systems : Module oriented converters." Thesis, Toulouse, INSA, 2015. http://www.theses.fr/2015ISAT0001/document.

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Ces dernières années, un intérêt croissant pour les systèmes électroniques de puissance a été motivé par l'émergence de sources d'énergie distribuées et renouvelables raccordées aux réseaux électriques. Dans ce contexte, la nécessité de topologies de faibles puissances alimentées par quelques modules photovoltaïques, en évitant l'utilisation de transformateurs, a ouvert l'étude de convertisseurs spéciaux et l’étude des stratégies de commande associées afin d’assurer la stabilité, la fiabilité et un rendement élevé du dispositif. Une possible solution est d’utiliser un dispositif générique connu dans la littérature scientifique et commerciale comme « micro-onduleur » ou «convertisseur intégré au module » qui avec le module photovoltaïque définit un produit « plug and play » appelé "module AC".Ce travail est consacré à l'étude d'un micro-onduleur monophasé avec deux étapes sans transformateur raccordée au réseau. La topologie proposée est composé d’un convertisseur DC-DC non isolé élévateur avec un gain quadratique et un onduleur réducteur lié au réseau connectés en cascade. Le convertisseur DC-DC extrait en permanence la puissance maximale du module photovoltaïque malgré les changements dans les conditions environnementales. L'étape DC-AC injecte la puissance extraite par l'étape DC-DC dans le réseau et assure un niveau élevé de qualité de l’énergie. Les efforts de recherche de ce travail sont concentrés sur la mise au point de commandes utilisant comment base, la théorie de contrôle par mode de glissement, qui conduit à une mise en œuvre simple avec une description théorique complète validée á partir de simulations et expérimentations.Après avoir décrit l'état de l’art dans le premier chapitre, le manuscrit est divisé en quatre chapitres, qui sont dédiés respectivement à l’algorithme de recherche du point de puissance maximale (MPPT), á l’étape de conversion DC-DC, á l'étape de conversion DC-AC et finalement au micro-onduleur complet. Un nouvel algorithme de recherche extrémal du point de puissance maximale est développé (SM-ESC). Pour la étape DC-DC, le convertisseur élévateur quadratique avec seulement un interrupteur contrôlé est étudié utilisant le concept de résistance sans perte par mode de glissement (de l’acronyme anglais : Sliding-Mode Loss-Free-Resistor – SM-LFR) afin d’obtenir un gain de tension élevé avec un fonctionnement sûr et compatible avec l’algorithme MPPT. Pour la étape DC-AC, le convertisseur de pont complet est contrôlé comme un onduleur de source de puissance (de l’acronyme anglais : Power Source Inverter - PSI) en utilisant une commande par mode de glissement qui poursuit une référence sinusoïdale de courant de sortie. Cette commande est complétée par une boucle de régulation de la tension du bus DC qui assure une haute qualité d’énergie injectée dans le réseau. Enfin, les trois étapes constitutives sont fusionnées pour obtenir un micro-onduleur complètement contrôlé par la technique de mode de glissement, ce qui constitue le principal résultat et contribution de cette thèse
These last years, a growing interest in power electronic systems has been motivated by the emergence of distributed renewable energy resources and their interconnection with the grid. In this context, the need of low power topologies fed by a few photovoltaic modules avoiding the use of transformers opens the study of special converters and the associated control strategies ensuring stability, reliability and high efficiency. A resulted generic device known in the commercial and scientific literature as “microinverter” or “module integrated converter” performs a plug and play product together with the PV module called an “AC module”.This work is devoted to the study of a transformer-less single-phase double-stage grid-connected microinverter. The proposed topology has a non-isolated high-gain boost type DC-DC converter and a non-isolated buck type DC-AC converter connected in cascade through a DC bus. The DC-DC converter permanently extracts the maximum power of the PV module ensuring at the same time a good performance coping with power changes introduced by the change in the environmental conditions. The DC-AC stage injects the power extracted by the DC-DC stage into the grid ensuring a high level of power quality. The research efforts focus on the involved control functions based on the sliding mode control theory, which leads to a simple implementation with a comprehensive theoretical description validated through simulation and experimental results.After giving the state-of-the-art in the first chapter, the manuscript is divided into four chapters, which are dedicated to the Maximum Power Point Tracking (MPPT), the DC-DC stage and its control, the DC-AC stage and its control and the complete microinverter. A new Extremum Seeking Control (ESC) MPPT algorithm is proposed. The single-switch quadratic boost converter is studied operating as a Loss-Free-Resistor (LFR) obtaining a high DC output voltage level with a safe operation. The full-bridge converter is controlled as a Power Source Inverter (PSI) using a simple sliding-mode based tracking law, regulating the voltage of the DC bus and then ensuring a high power quality level in the grid connection. Finally, the three building blocks are merged to obtain a sliding mode controlled microinverter constituting the main result and contribution of the work

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Lake, Jason Paul. "Establishing the optimum resistance training load for maximal gains in mechanical power output." Thesis, University of Chichester, 2010. http://eprints.chi.ac.uk/812/.

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The development of powerful muscle function is fundamental to the strength and conditioning process. Optimal load resistance training uses the load that maximises power output to more efficiently achieve this. However, research has shown that factors including measurement method and training status can significantly influence the optimal load. The five experimental studies of this thesis investigated these factors. First, the way in which the positive lifting phase is identified was examined to establish the underpinnings of ballistic resistance exercise preference over traditional alternatives. The results of this study showed that the positive lifting phase of ballistic resistance exercise did not consider the deceleration phase and when this was applied to traditional resistance exercise a greater portion of the positive lifting phase was spent accelerating the barbell. This finding suggested that the assumption of ballistic resistance exercise superiority is theoretically unfounded whilst potentially posing a greater risk of injury. The next three studies established the reliability and suitability of different methods used to measure resistance exercise power output. The second study revealed that the most practically applicable, theoretically sound and reliable method of obtaining power output used the barbell kinematics approach where the acceleration of the barbell was considered but body mass excluded. This may have important implications for field-based methods that are underpinned by this approach. The results of the third and fourth study reinforced the findings of study two. The third study considered whether neglecting horizontal barbell power caused the barbell kinematics approach to underestimate resistance exercise power output, and established that the horizontal contribution did not exceed 2%. The effect of bilateral asymmetries on barbell power output was examined in the fourth study and demonstrated that although ground kinetic side differences reached 21% they were not transmitted to left and right barbell end power outputs, with left and right bar end differences remaining below 4%. The barbell kinematics approach was then used in the fifth study, to show that stronger, more experienced individuals generated greater mean (17 to 35%) and peak (20 to 45%) power outputs and maximised mean and peak power with loads that were considerably less (3 to 15% of IRM less) than their weaker, less experienced counterparts. Training status did not significantly affect power and optimal load reliability. To summarise, measurement methods should not be used interchangeably. The barbell kinematics approach is recommended to obtain resistance exercise power output but the optimal load should be prescribed on an individual athlete basis and routinely monitored for maximum accuracy.

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Dietze, Kai. "Analysis of a Two-Branch Maximal Ratio and Selection Diversity System with Unequal Branch Powers and Correlated Inputs for a Rayleigh Fading Channel." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32412.

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This report, presents an analytical framework for analyzing two-branch diversity systems for a Rayleigh fading channel. In many cases the fading received at both branches (i.e. a two-antenna element system) is correlated because of the proximity of the antenna elements to each other. It is also not uncommon for a diversity system to use antennas with different patterns or polarizations, this usually results in differences in average signal-to-noise ratios at both branches depending on which element is better matched to the signal environment. As will be shown, the performance of a diversity system depends greatly on the envelope correlation, average power imbalance and the combining scheme used on both branches. An analytical expression for the probability density function of the signal-to-noise ratio at the output of a two-branch maximal ratio and selection diversity system is developed in this report. The two branches are assumed to be Rayleigh fading, correlated, as well as of unequal signal-to-noise ratios. Measurements were made in Rayleigh fading channels and compared to the analytical results. The analytical cumulative distribution functions (derived using probability distributions) were found to be within 1 dB of the measured results (statistics obtained from time combining) for both maximal ratio and selection diversity attesting to the validity of the analytic results. Also developed in this report are the exact analytical average probabilities of symbol error for coherent BPSK and coherent QPSK before and after maximal ratio combining for this environment. The diversity gain for selection, maximal ratio, and equal gain combining for the 10% probability level is presented as a function of power imbalance and correlation between branches for a two-branch Rayleigh diversity system
Master of Science

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Nikjah, Reza. "Performance evaluation and protocol design of fixed-rate and rateless coded relaying networks." Phd thesis, 2010. http://hdl.handle.net/10048/1674.

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The importance of cooperative relaying communication in substituting for, or complementing, multiantenna systems is described, and a brief literature review is presented. Amplify-and-forward (AF) and decode-and-forward (DF) relaying are investigated and compared for a dual-hop relay channel. The optimal strategy, source and relay optimal power allocation, and maximum cooperative gain are determined for the relay channel. It is shown that while DF relaying is preferable to AF relaying for strong source-relay links, AF relaying leads to more gain for strong source-destination or relay-destination links. Superimposed and selection AF relaying are investigated for multirelay, dual-hop relaying. Selection AF relaying is shown to be globally strictly outage suboptimal. A necessary condition for the selection AF outage optimality, and an upper bound on the probability of this optimality are obtained. A near-optimal power allocation scheme is derived for superimposed AF relaying. The maximum instantaneous rates, outage probabilities, and average capacities of multirelay, dual-hop relaying schemes are obtained for superimposed, selection, and orthogonal DF relaying, each with parallel channel cooperation (PCC) or repetition-based cooperation (RC). It is observed that the PCC over RC gain can be as much as 4 dB for the outage probabilities and 8.5 dB for the average capacities. Increasing the number of relays deteriorates the capacity performance of orthogonal relaying, but improves the performances of the other schemes. The application of rateless codes to DF relaying networks is studied by investigating three single-relay protocols, one of which is new, and three novel, low complexity multirelay protocols for dual-hop networks. The maximum rate and minimum energy per bit and per symbol are derived for the single-relay protocols under a peak power and an average power constraint. The long-term average rate and energy per bit, and relay-to-source usage ratio (RSUR), a new performance measure, are evaluated for the single-relay and multirelay protocols. The new single-relay protocol is the most energy efficient single-relay scheme in most cases. All the multirelay protocols exhibit near-optimal rate performances, but are vastly different in the RSUR. Several future research directions for fixed-rate and rateless coded cooperative systems, and frameworks for comparing these systems, are suggested.
Communications

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Книги з теми "Maximum power gain"

Praying with Power: How to Use Ancient Shamanic Techniques to Gain Maximum Spiritual Benefit and Extraordinary Results Through Prayer. Watkins, 2005.

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Sandridge, Ellen T. Power of Mini Habits: Mastering the Art of Habits for Maximum Weight Loss to Gain a Flat Belly, Optimum Health to Live a Longer and Better Life. Independently Published, 2022.

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Secret of Running: Maximum Performance Gains Through Effective Power Metering and Training Analysis. Meyer & Meyer Sport, Limited, 2017.

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Dijk, Hans van, and Ron van Megen. Secret of Cycling: Maximum Performance Gains Through Effective Power Metering and Training Analysis. Meyer & Meyer Sport, Limited, 2017.

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Частини книг з теми "Maximum power gain"

Ni, Chun, Zhongxiang Zhang, Meng Kong, Mingsheng Chen, Hui Wang, and Xianliang Wu. "A 0.6–2.4 GHz Broadband GaN HEMT Power Amplifier with 79.8% Maximum Drain Efficiency." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 214–22. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60753-5_23.

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Iqteit, Nassim, Khalid Yahya, and Sajjad Ahmad Khan. "Wireless Power Charging in Electrical Vehicles." In Wireless Power Transfer – Recent Development, Applications and New Perspectives. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96115.

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Wireless Power Transfer (WPT) technology can transfer electrical energy from a transmitter to a receiver wirelessly. Due to its many advantages, WPT technology is a more adequate and suitable solution for many industrial applications compared to the power transfer by wires. Using WPT technology will reduce the annoyance of wires, improve the power transfer mechanisms. Recently, the WPT gain enormous attention to charging the on-board batteries of the Electric Vehicle (EV). Several well-known car manufacturing companies start efforts to adopt WPT technology and enhance its features. Therefore, WPT can be achieved through the affordable inductive coupling between two coils named a transmitter and a receiver coil. In EV charging applications, transmitter coils are located underneath the road, and receiver coils are installed in the EV. The inductive WPT of resonant type is generally applied to medium-high power transfer applications like EV charging because it achieves better energy efficiency. In this chapter, various WPT technologies are discussed and tested in EV wireless charging applications. Furthermore, extensive information is given to developing an advanced WPT technology that can transfer maximum power by achieving maximum efficiency.

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Rasmi, Amiza. "Design of Medium Power Amplifier Using GaAs PHEMT Technology for Wireless Applications." In Advances in Monolithic Microwave Integrated Circuits for Wireless Systems, 185–204. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-60566-886-4.ch008.

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This paper presents the design of single-stage and two-stage medium power amplifiers (MPAs) using GaAs PHEMT technology for the wireless applications. The single-stage MPA was designed using 0.15 µm GaAs PHEMT technology to be operated at 3.5 GHz whereas the two-stage MPA was designed using 0.5 µm GaAs PHEMT technology to be operated at 5.8 GHz. The MPAs employ a simple RC feedback in order to linearize the stages as well as to improve the circuit stability and to control the gain. In addition, the load-pull technique was used in order to define the optimum load and maximum output power. Therefore, the performance of the proposed amplifier in this paper is discussed in terms of stability, gain, power-added efficiency (PAE), and output power. The simulated data of the proposed MPAs is then compared with the measured data of the fabricated MPAs.

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Yellampalli, Siva Sankar, and Rashmi S. B. "Review on 60GHz Low Noise Amplifier for Low Power and Linearity." In Advances in Wireless Technologies and Telecommunication, 283–315. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0773-4.ch009.

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In the extremely high frequency radio spectrum of 30-300 GHz, the band from 57-64 GHz has been de-regulated. The biggest challenge in designing products at this frequency is the design of CMOS based transceiver circuit components. This chapter deals with the review of 60 GHz LNA design. LNA was chosen as this is the first component of the receiver circuit and its performance affects the transceiver efficiency. In this chapter the review is done on 60GHz LNA's design addressing the linearization, and low power challenges. To address these challenges, in literature there are many LNA architectures such as simple cascode topology, Current reuse topology etc. The major advantage of current reuse topology is its load transistor shares the same bias current of driver which results in reduced power dissipation by maintaining the maximum gain. The main objective of this chapter is to address gain, power dissipation and linearization challenges by reviewing the different current reuse architectures and linearization techniques used to implement 60GHz LNA.

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Pandya, Bhavya Dharmesh, and Siddharth Joshi. "Comparative Analysis of Advanced Controllers for Standalone WECs for DC Microgrid Applications." In Advances in Environmental Engineering and Green Technologies, 38–82. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-4012-4.ch002.

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The small-scale wind energy generation system is one of the solutions to empower the isolated loads and provides a promising solution to decrease the greenhouse effect. This chapter describes the simulation analysis for wind energy conversion system incorporated with maximum power point tracking feature. The MPPT algorithms like variable current perturb and observe algorithm and variable step perturb and observe algorithm are incorporated with WECS. The comparative analysis is done in the closed-loop model in continuous time-varying wind speed. The closed-loop simulation is performed using a conventional fixed gain controller. To address the limitations of the fixed gain controller, the analysis is done using the gain scheduling proportional integral controller and the good gain method to tune the proportional integral controller. The comparative analysis between the fixed gain controller, the gain scheduling proportional integral controller, and the good gain method to tune proportional integral controller for above-stated MPPT methods is shown.

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Ribate, Mohamed, Rachid Mandry, Larbi El Abdellaoui, and Mohamed Latrach. "GaAs Solid State Broadband Power Amplifier for L and S Bands Applications." In Advances in Computer and Electrical Engineering, 156–90. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-0117-7.ch005.

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This chapter provides an insight view of the Broadband Power Amplifier (BPA) design. Basically, the aim of the BPA is to increase the power level of the signal presents at its input terminal up to a prefixed power level at its output terminal in the operating frequency band. The research of a GaAs single stage solid state broadband power amplifier based of ATF13876 which operates in the frequency band ranging from 1.17 GHz to 3 GHz is presented in this chapter. The wider bandwidth circuits are designed by using transmission lines which are intrinsically wideband circuits. With carefully designed biasing and broadband matching networks, unconditionally stability and excellent matching performance are fulfilled over the overall operating bandwidth with a maximum power gain of 17.34 dB and a saturated output power of 17 dBm. Considering the wider bandwidth of the proposed BPA, the latter compares favorably with the contemporary state-of-the-art.

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Gonzales Palacios, Orlando Francois, Ricardo Erick Diaz Vargas, Patrick H. Stakem, and Carlos Enrique Arellano Ramirez. "Koch Snowflake Fractal Antenna Design in the Deep Space Bands for a Constellation of Cubesat Explorers." In Proceedings of CECNet 2021. IOS Press, 2021. http://dx.doi.org/10.3233/faia210419.

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This paper presents the design and simulation of a Koch curve fractal antenna, developed according to the second iteration of the Koch snowflake fractal for S-band, C-band, X-band and Ku-band. The simulated antenna shows good performance for the operating frequencies and desirable gain, bandwidth and VSWR parameters. Being a compact antenna, it has a size, geometry and characteristics that go in accord with the CubeSat’s structure standards. The antenna was fabricated on a 1.5 mm thick FR-4 substrate. The VSWR achieved values are lower than 1.4 for the frequencies used (2.1 GHz to 2.4 GHz and 7.4 GHz to 8.9 GHz) with a simulated omnidirectional radiation pattern. A maximum gain of 6.8 dBi was achieved. As this antenna works optimally in the S, C and X bands, it is adequate for deep space applications, especially in low-power consumption systems. This approach would be ideal for constellations of Cubesat explorers.

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S., Kannadhasan, Nagarajan R., and Kanagaraj Venusamy. "Recent Trends in Microstrip Patch Antenna Using Textile Applications." In Computer-Assisted Learning for Engaging Varying Aptitudes, 103–19. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-5058-1.ch009.

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Wireless body area networks (WBANs) have gotten a lot of interest as the need for wearable gadgets like smart watches, eyewear, and clothing grows. WBAN applications need the use of a conformal antenna. A low-profile IR-UWB antenna and an all-textile higher order mode circular patch antenna for omnidirectional radiation were used to meet this need. To achieve maximum power output, researchers need to maintain the antenna's efficiency as high as feasible while designing a lightweight antenna for wireless power transfer. The need for tiny textile antennas with high gain and broadband features has risen in response to the fast growth of wireless power transfer. Microstrip patch antennas provide a number of advantages, including a cheap cost, a low profile, a light weight, and a simple manufacturing method. Increases in substrate thickness, antenna efficiency, use of a low dielectric substrate, and different impedance matching and feeding techniques are all examples of ways to enhance antenna bandwidth.

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Setti, Paulo T., and Tonie van Dam. "Comparison of the Effective Isotropic Radiated Power Parameter in CYGNSS v2.1 and v3.0 Level 1 Data and Its Impact on Soil Moisture Estimation." In International Association of Geodesy Symposia. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/1345_2022_176.

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AbstractThe effective isotropic radiated power (EIRP) is the measured radiated power of an antenna pointed in a specific direction. For the Global Positioning System (GPS), the EIRP is a function of the transmitted power and the gain of the transmitting antenna. It is a fundamental observation used for estimating surface reflectivity that can be used to estimate near-surface soil moisture. Most investigations of GPS EIRP for soil moisture used level 1 version 2.1 data from the eight satellites of the Cyclone Global Navigation Satellite System (CYGNSS) mission. The newer version 3.0 introduces a dynamic EIRP calibration algorithm with the variations in GPS transmit power being tracked using the direct signal power measured by the navigation receivers. In this paper we compare the estimated EIRP from versions 2.1 and 3.0 for the year of 2020. We correlate the estimated surface reflectivity with reference soil moisture observations from the Soil Moisture Active Passive (SMAP) mission provided on a 9x9 km grid using the bistatic radar equation for coherent reflections. The correlation of CYGNSS with SMAP is slightly improved using version 3.0 versus 2.1 with average of 0.10 and maximum of 0.30. The advantage of version 3.0 was most noticeable in areas where soil moisture retrieval is challenging, such as the arid and densely vegetated regions of the world.

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Teshome, Assefa K., Behailu Kibret, and Daniel T. H. Lai. "Wireless Implant Communications Using the Human Body." In Advances in Computer and Electrical Engineering, 1153–71. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7598-6.ch085.

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This chapter first examines a new analytical electromagnetic model that uses galvanically coupled intrabody communication (IBC). Frequencies ranging from hundreds of kHz up to a few MHz are considered under quasi-static assumptions. The model is unified in the sense that it can be applied to any part of the body (i.e., head, torso, limbs, etc.). It also describes influences of tissue property and geometry of the body part. The security and low power consumption of IBC are also apparent in this model. The path loss characterization of IBC implants shows lower values compared to their MICS counterparts. In addition, the chapter also elaborates on the use of human body as antenna. A scenario where an RF current is fed by a tiny toriodal inductor clamped around tissues in the ankle is studied. The frequency range of 1-70 MHz is considered. Theoretical results show that the system has a maximum gain of - 25 dB between 20 to 40 MHz, assuming an isotropic radiation from human body. For improved performance, mitigation techniques for losses are also discussed.

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Тези доповідей конференцій з теми "Maximum power gain"

Ivrlac, Michel T., and Josef A. Nossek. "The maximum achievable array gain under physical transmit power constraint." In 2008 International Symposium on Information Theory and Its Applications (ISITA). IEEE, 2008. http://dx.doi.org/10.1109/isita.2008.4895614.

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Kajangpan, Korawit, and Bunlung Neammanee. "High gain double interleave technique with maximum peak power tracking for wind turbine converter." In 2009 6th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON). IEEE, 2009. http://dx.doi.org/10.1109/ecticon.2009.5137011.

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Chaibi, Redouane, Rachid EL Bachtiri, Karima El Hammoumi, and Mohamed Yagoubi. "Maximum Power Point Tracking of a Photovoltaic System Using State Feedback Gain Fuzzy Control." In 2022 10th International Conference on Systems and Control (ICSC). IEEE, 2022. http://dx.doi.org/10.1109/icsc57768.2022.9993856.

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Subrata, Arsvad Cahva, Tole Sutikno, Sanieevikumar Padmanaban, and Hendril Satrian Purnama. "Maximum Power Point Tracking in PV Arrays with High Gain DC-DC Boost Converter." In 2019 6th International Conference on Electrical Engineering, Computer Science and Informatics (EECSI). IEEE, 2019. http://dx.doi.org/10.23919/eecsi48112.2019.8977072.

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Ashraf Gandomi, Amin, Saeid Saeidabadi, and Mehran Sabahi. "Maximum power point tracking control method in high gain transformer-based inverters for photovoltaic application." In 2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC). IEEE, 2017. http://dx.doi.org/10.1109/pedstc.2017.7910404.

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Krapchev, Vladimir B. "Atmospheric Raman thresholds for power and fluence of a linearly polarized laser." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.wu8.

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The rotational Raman gain in N2 is evaluated, taking into account the Stokes-antiStokes coupling1 for linearly polarized light and the dispersion of the refractive index of the air. A significant reduction of the gain coefficient near the phase matching angle increases the threshold intensities for peak powers of less than 10 GW. The maximum laser power for atmospheric propagation in steady state, and the maximum fluence for a transient Raman gain are evaluated for diffraction limited beam propagation achieved by phase compensation for turbulence.

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Kiran, Y. M., and S. Srinivas. "High Gain Energy Efficient DC-DC Converter for True Maximum Power Tracking in PV Applications." In 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES). IEEE, 2018. http://dx.doi.org/10.1109/pedes.2018.8707499.

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Cho, Junho, Greg Raybon, Ellsworth Burrows, Jean-Christophe Antona, Nicolas Fontaine, Roland Ryf, Haoshuo Chen, et al. "Optimizing Gain Shaping Filters with Neural Networks for Maximum Cable Capacity under Electrical Power Constraints." In 2020 European Conference on Optical Communications (ECOC). IEEE, 2020. http://dx.doi.org/10.1109/ecoc48923.2020.9333383.

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Glick, Yaakov, and Shmuel Sternklar. "High efficiency in a double-pass Brillouin amplifier with noise suppression." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cmc6.

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Brillouin two-beam coupling has been used to achieve gains as high as 109.1 For a given input signal power there is a maximum pump extraction efficiency, and therefore an upper limit to the attainable gain for a given pump power.2 For example, for a 0.1 mW input signal the maximum experimental efficiency is about 2%, so that for a pump power of 20 MW the maximum gain is 4 × 109. The cause of this efficiency limitation is the presence of spontaneously scattered noise at the Stokes-shifted frequency. This noise arises from scattering of the pump light by acoustic fluctuations in the medium and will be amplified by the same factor as the input signal. In this work we present a system that can overcome this limitation and achieve higher efficiency and gain.

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Dixit, Saurabh Shripad, and D. R. Patil. "A Grid-Connected Single Step High Gain Buck-Boost Inverter Using Fuzzy Maximum Power Point Tracking." In 2019 International Conference on Communication and Electronics Systems (ICCES). IEEE, 2019. http://dx.doi.org/10.1109/icces45898.2019.9002068.

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