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Dissertations / Theses on the topic 'Multiband I'

Author: Grafiati

Published: 8 June 2022

Last updated: 31 July 2025

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1

Marques, Anselmo Miguel Magalhães. "Frustrated multiband superconductors." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12174.

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Mestrado em Física<br>Motivada pela recente descoberta de supercondutores baseados em ferro, com altas temperaturas críticas e possibilidade de coexistência de múltiplas bandas no nível de Fermi, esta dissertação pretende estudar as condições sob as quais se podem manifestar configurações frustradas nas fases supercondutoras, em função das variáveis temperatura e campo magnético externo aplicado. A Acão reciproca entre as interações atrativas/repulsivas interbandas e intrabandas e analisada, sendo apresentado o diagrama de fases de campo magnético vs. temperatura para um regime de acop

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Corrêa, Lucas Eduardo. "Investigação de supercondutividade em boreto do sistema Ta-Zr-B." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/97/97135/tde-03122018-184821/.

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Em trabalhos anteriores realizados em síntese e caracterização cristalográfica, a existência de uma nova fase de estequiometria Ta1-xHfxB (com x variando no intervalo entre 0,05 e 0,4) que cristaliza no protótipo FeB foi descoberta. Este ternário cristaliza num protótipo diferente do protótipo CrB aceito no binário TaB. Na verdade, essa substituição é capaz de gerar uma mudança significativa na estrutura cristalina de TaB, a qual sofre uma distorção e modifica o protótipo CrB para FeB. Além desta mudança estrutural os compostos de composição global Ta1-xHfxB apresentam supercondutividade com t

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3

Blaschke, Volker. "Multiband Cognitive Radio-Systeme." [S.l. : s.n.], 2008. http://digbib.ubka.uni-karlsruhe.de/volltexte/1000009926.

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4

Saucier, Scott. "Multiband Analog-to-Digital Conversion." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/SaucierS2002.pdf.

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5

Abutarboush, Hattan F. "Fixed and reconfigurable multiband antennas." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/9037.

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With the current scenario of development of antennas in the wireless communication field, the need of compact multiband, multifunctional and cost effective antenna is on the rise. The objective of this thesis is to present fixed and reconfigurable techniques and methods for small and slim multiband antennas, which are applicable to serve modern small and slime wireless, mobile and cognitive radio applications. In the fixed designs, independent control of the operating frequencies is investigated to enhance the antennas capabilities and to give the designer an additional level of freedom to des

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Maxwell, Michael. "Multiband observations of recurrent novae." Thesis, University of Central Lancashire, 2014. http://clok.uclan.ac.uk/10719/.

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Recurrent novae are binary systems which undergo outbursts due to a thermonuclear runaway on a timescale of decades. Two systems, U Scorpii and RS Ophiuchi, are the main focus of this thesis having gone into outburst in 2010 and 2006 respectively. Optical and near-IR spectroscopy of U Sco obtained with facilities including the Liverpool Telescope, the Very Large Telescope, and the Southern African Large Telescope, as well as ultra-violet and optical spectroscopy of RS Oph obtained with the Ultra-Violet and Optical Telescope, are presented here. Observations of U Sco obtained in outburst are us

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Abunjaileh, Alaa Ibrahim. "Multimode and multiband microstrip antennas." Thesis, University of Leeds, 2007. http://etheses.whiterose.ac.uk/759/.

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This thesis describes original work on the broadband and multiband matching of microstrip patch antennas. Microstrip patch antennas suffer from many constraints on their performance. One major restriction is their narrow impedance bandwidth. An effective method to resolve this is adding more resonators to the antenna structure to achieve multi-resonance and hence wider bandwidth. Structures such as circular, square and triangular patch antennas may support two orthogonal resonant modes or polarisations. This allows excitation of an additional resonance beside the fundamental. With the correct

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8

Tzeng, Jack. "Multiband deblurring for fluid lens cameras." Diss., [La Jolla] : University of California, San Diego, 2010. http://wwwlib.umi.com/cr/ucsd/fullcit?p3404214.

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Thesis (Ph. D.)--University of California, San Diego, 2010.<br>Title from first page of PDF file (viewed June 10, 2010). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (leaves 96-100).

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Blaschke, Volker [Verfasser]. "Multiband cognitive Radio-Systeme / Volker Blaschke." Karlsruhe : Inst. für Nachrichtentechnik, 2008. http://d-nb.info/998339180/34.

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10

Maassel, Michael. "A Metamaterial-Based Multiband Phase Shifter." Diss., North Dakota State University, 2014. https://hdl.handle.net/10365/27095.

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A design methodology for a multi-band phase shifter using a metamaterial-based transmission line was developed. This method is different in that the loaded-line phase shifter has a phase shift of 90 degrees at the center frequencies of both bands instead of -90 degrees and -270 degrees. The method was validated using simulation and measured results.

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Pivit, Florian. "Multiband-Aperturantennen für Basisstationsanwendungen in rekonfigurierbaren Mobilfunksystemen /." Karlsruhe : IHE, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014885402&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Tejero, Alfageme Simón. "Resolution and accuracy in multiband radar sensors." Berlin Logos-Verl, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=3004797&prov=M&dok_var=1&dok_ext=htm.

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13

Corden, Ian Robert. "Efficient transmultiplexer algorithms multiband quadrature modulation schemes." Thesis, Staffordshire University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280562.

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FIGUEIREDO, TIAGO NASCIMENTO DE. "BROADBAND RF POWER AMPLIFIERS FOR MULTIBAND TRANSCEPTORS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=22900@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Este trabalho descreve o desenvolvimento completo de um Amplificador de Potência de RF para Transceptores Multibanda. Em sua etapa inicial mostra um apanhado geral da teoria de todos os parâmetros relevantes para a medida de desempenho desses dispositivos, como potência, ganho e parâmetros de não linearidades. Em seguida são expostas as teorias básicas para o entendimento dos mecanismos para extração da máxima potência de um transistor, focando nos transistores de efeito de campo FET, incluindo a caracterização para regimes de alta potência

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Eckstein, Bernd. "Bandcounter: Counting bands of multiband chaotic attractors." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-28244.

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Badran, Salah Al-Din Ibrahim. "Efficient multiband algorithms for blind source separation." Thesis, De Montfort University, 2016. http://hdl.handle.net/2086/16089.

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The problem of blind separation refers to recovering original signals, called source signals, from the mixed signals, called observation signals, in a reverberant environment. The mixture is a function of a sequence of original speech signals mixed in a reverberant room. The objective is to separate mixed signals to obtain the original signals without degradation and without prior information of the features of the sources. The strategy used to achieve this objective is to use multiple bands that work at a lower rate, have less computational cost and a quicker convergence than the conventional

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Safia, Abdelmounaime. "Développement d’un modèle d’analyse de texture multibande." Thèse, Université de Sherbrooke, 2014. http://hdl.handle.net/11143/5990.

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Résumé : En télédétection, la texture facilite l’identification des classes de surfaces sur des critères de similitude d’organisation spatiale des pixels. Les méthodes d’analyse texturale utilisées en télédétection et en traitement d’image en général sont principalement proposées pour extraire la texture dans une seule bande à la fois. Pour les images multispectrales, ceci revient à extraire la texture dans chaque bande spectrale séparément. Cette stratégie ignore la dépendance qui existe entre la texture des différentes bandes (texture inter-bande) qui peut être une source d’information addit

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Shakya, Bikash. "A Study of Multiband Indoor Radio Distribution System." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174864.

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The mobile indoor traffic are increasing exponentially which is the current challenge inindoor coverage and design for most of the researchers and business companies todevelop further. There are different trade-off to provide different indoor services withthe use of different repeater system, distributed antenna network (active and passive),macro cells indoor penetrations and many more. As the use of energy effective materialsfor construction of buildings have made a blockage of RF signals from macro cells,usually a separate installations are done to provide indoor coverage for differentservic

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Sun, Hanwu. "Adaptive techniques for multiband parameter estimation and extraction." Thesis, University of Westminster, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296126.

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Gebremicael, Kibrom Negash. "Compressive sensing based multiband RF power amplifier linearisation." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.730827.

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Jonsson, Joakim. "Detecting Cardiac Pulsatility and Respiration using Multiband fMRI." Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149863.

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Purpose: Arterial stiffening poses an increased risk of cerebrovascular diseases, cognitive impairments, and even dementia as cardiac pulsations reach further into the brain causing white matter hyperintensities and microbleeds. Therefore it is of interest to obtain methods to estimate and map cardiac related pulsatility in the brain. Improvements of functional magnetic resonance imaging (fMRI) sequences is potentially allowing detection of rapid physiological processes in the echo-planar imaging (EPI) signal in the brainthrough a higher sampling rate. Specifically in this thesis, estimation a

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To, Duy-Quang. "Advanced k.p multiband methods for semiconductor-based spinorbitronics." Thesis, Institut polytechnique de Paris, 2019. http://www.theses.fr/2019IPPAX001.

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Ce travail de thèse est essentiellement consacré au développement de la théorie de transport tunnel k.p 14, 30 et 40 bandes pour une application à la spinorbitronique avec semiconducteur. La spinorbitronique associe les effets de spin et d’orbite, qui par l’intermédiaire du couplage spin-orbite, introduit des propriétés de transport nouvelles comme les effets Hall de spin et tunnel Hall anormal. Ce dernier se caractérise par une déflection de la trajectoire des porteurs polarisés selon la direction transverse de leur flux. D’autres effets caractéristiques concernent i) les mécanismes de transf

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Renosto, Sergio Tuan. "Estudo da supercondutividade em diboretos de metais de transição (MeB2), com protótipo ALB2 e suas variações." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/97/97135/tde-05082015-161044/.

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O grupo de diboretos isoestruturais ao MgB2 com estrutura representada pelo protótipo AlB2 é considerado candidato à supercondutividade. Contudo, a existência do estado supercondutor é um fenômeno raro nesse grupo de materiais, de fato a grande maioria dos diboretos de metais de transição é caracterizada por um Tc menor que 0,7 K. Nesse grupo, os compostos normais HfB2, VB2, YB2 e ZrB2 exibem assinatura do comportamento paramagnético de Pauli em baixas temperaturas. Nesse trabalho é mostrado que a substituição parcial do metal (Hf e Zr) por V nas amostras M1-xVxB2, gera distorções da rede cris

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Junior, Pedro Luiz Frare. "Seleção de múltiplos planos em tomografia por ressonância magnética nuclear." Universidade de São Paulo, 1990. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-06122013-150646/.

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Apresentamos um estudo e a implementação de três técnicas destinadas a seleção de múltiplos planos, com objetivo de otimizar a tomografia por RMN. A primeira utiliza a excitação simultânea de múltiplos planos, sendo cada plano codificado com uma fase pré-determinada e a informação destes decodificada a posteriori através da combinação linear dos dados de n experimentos realizados. A segunda utiliza-se da excitação simultânea de múltiplos planos, como na técnica anterior, porém esses planos são adquiridos na presença de um gradiente de leitura oblíquo, que permite a obtenção simultânea dos sina

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Gemio, Valero Joan. "Multiband and Silicon Integrated Antennas for Wireless Sensor Networks." Doctoral thesis, Universitat Autònoma de Barcelona, 2011. http://hdl.handle.net/10803/79096.

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Les tecnologies sense fils han provocat una important revolució en el món de les xarxes i serveis de telecomunicació. Han apareguts nous sistemes com els telèfons mòbils d'última generació o les xarxes LAN sense fils que han estat acceptats amb entusiasme per la població. En particular, l'ús de xarxes de sensors (per controlar la temperatura, per a detectar places lliures d'aparcament, etc.) està creixent ràpidament . Aquesta tesi es centra en el disseny d'antenes per a xarxes de sensors distribuïts. En concret s'analitza un sistema on els sensors remots estan connectats a una unitat central

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Saleem, Rashid. "Towards an end-to-end multiband OFDM system analysis." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/towards-an-endtoend-multiband-ofdm-system-analysis(e711f32f-1ac6-4b48-8f4e-58309c0482d3).html.

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Ultra Wideband (UWB) communication has recently drawn considerable attention from academia and industry. This is mainly owing to the ultra high speeds and cognitive features it could offer. The employability of UWB in numerous areas including but not limited to Wireless Personal Area Networks, WPAN's, Body Area Networks, BAN's, radar and medical imaging etc. has opened several avenues of research and development. However, still there is a disagreement on the standardization of UWB. Two contesting radios for UWB are Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) and DS-UWB (Dire

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Jasper, David Brian. "RF pHEMT Switch Model for Multiband Cell Phone Circuits." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-11032004-220504/.

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Simulation of Radio Frequency Switches used in the cellular phone industry is the main focus of this study. The RF pHEMT?s used in an antenna switch for multiband cell phone circuits requires the use of an accurate model during simulation of the RF system. The pHEMT model extracted in this study utilizes theoretical methods within the extraction software and an analysis of simulated data and measured data. This study describes the techniques of calibration, model extraction, and data analysis.

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Martin, Gregory Russell. "Studies of real-time multiband adaptive gain hearing aids." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12920.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.<br>Includes bibliographical references (leaves 71-72).<br>by Gregory Russell Martin.<br>M.S.

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Nepaya, Leokadia Ndeapo Popyeni. "Practical realisation of multiband planar filters on multilayer substrates." Doctoral thesis, Faculty of Engineering and the Built Environment, 2019. http://hdl.handle.net/11427/30347.

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This research presents the design of planar microwave filters implemented on microstrip multi-layer technology. These should be able to attain and realize specified essential requirements such as multi-band operation, compact size, and without significant deteriorated filter performance in comparison with single-band filters. The focus is placed on new synthesis and design procedures for multiband responses. In some cases, the possibility to include re-configurable characteristics of these filters is required. The focus of the research is entirely on examining the properties and implications o

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Adiseno. "Design Aspects of Fully Integrated Multiband Multistandard Front-End Receivers." Doctoral thesis, KTH, Microelectronics and Information Technology, IMIT, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3581.

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<p>In this thesis, design aspects of fully integrated multibandmultistandard front-end receivers are investigated based onthree fundamental aspects: noise, linearity and operatingfrequency. System level studies were carried out to investigatethe effects of different modulation techniques, duplexing andmultiple access methods on the noise, linearity and selectivityperformance of the circuit. Based on these studies and thelow-cost consideration, zero-IF, low-IF and wideband-IFreceiver architectures are promising architectures. These havea common circuit topology in a direct connection between th

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吳松軒. "Multiband Planar Antennas." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/91172014680560215948.

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碩士<br>明新科技大學<br>電機工程研究所<br>98<br>Recently,there are rapid developments in wireless Communications.The frequency range covers 2-6GHz for Radio Frequency Identification (RFID 2.4GHz) , Wireless LAN (2400–2484 MHz,and 5150–5350/5725–5875 MHz MHz), Worldwide Interoperability for Microwave Access(WiMAX 3.5GHz) and Bluetooth(2.4GHz) and so on. In order to satisfy the IEEE 802.11WLAN standards and wimax application, the triple band operations of the printed antennas are required.A compact modified unilateral fed coplanar Waveguide antenna (CPW) designed by IE3D software is presented. The antennas are

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Srivastava, Prateek. "MULTIBAND TRIANGULAR PATCH ANTENNA." Thesis, 2015. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14330.

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In telecommunication, there are several types of microstrip antennas (also known as printed antennas) the most common of which is the microstrip patch antenna or patch antenna. A patch antenna is a narrowband, wide-beam antenna. Microstrip antennas are relatively inexpensive to manufacture and design because of the simple 2- dimensional physical geometry. They are usually employed at UHF and higher frequencies because the size of the antenna is directly tied to the wavelength at the resonant frequency. A single patch antenna provides a maximum directive gain of around 6-9 dB. It is relat

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KUO, Chun-Yi, and 郭俊逸. "Design of Multiband Planar Antenna." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/94193761606288531922.

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YUEH, WANG CHUNG, and 王忠嶽. "Multiband Antenna Simulation and Design." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/34012930120670476862.

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碩士<br>大葉大學<br>電信工程學系碩士在職專班<br>97<br>This thesis presents the design of two printed dipole antennas. These two antennas were developed to produce multiple resonant bands so as to support multi-standard wireless-communication products, such as laptop computers, personal digital assistances (PDAs), and mobile wireless networking devices. These standards include GSM 900 MHz (Global System for Mobile Communications; 870-960 MHz), DCS 1800 MHz (Digital Communication System; 1710-1880 MHz), PHS 1900 MHz (Personal Handy-Phone System; 1890-1915 MHz), WCDMA 2100 MHz (Wideband Code-Division Multiple Acce

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Chen, Wen-Wang, and 陳文旺. "Design of Multiband Operation Antenna." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/58373468536045029929.

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碩士<br>高苑科技大學<br>電子工程研究所<br>98<br>The paper presents study of multi-band monopole antenna, which utilize simulation software Ansoft HFSS 10 to measure the antenna return loss which under -10dB with Smith chart and coincidence to the standard of range, and the multiband ( DVB、 GSM、GPS、DCS、PCS、Bluetooth、WLAN and WiMAX ) are contained and applied. The monopole antenna uses slot、meanderings、parasitic antenna、loop、reflecting board and “ PIFA ”, those techniques attempted to encourage each band effectively. Due to the design of antenna on the base, some slots are used the impedances of loops to compe

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韓政達. "Multiband Antennas Design and Implementation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/11197892513355029743.

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碩士<br>明新科技大學<br>電機工程研究所<br>97<br>Two types of antennas, loop antennas and CPW fed monopole antennas, are proposed and studied. The antennas are implemented on planar printed circuit boards(PCBs). These antennas are low profile, easy constructed and easy to be integrated with microwave integrated circuits. The implementation of antennas not only reduces the manufacturing cost but also decreases the antenna size and shrinks the size of the system further. In this thesis we implemented two kinds of antennas. One is a loop antenna, which is a double-band antenna for RFID usage. The other is a CPW

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徐子祥. "Study of Multiband Bandpass Filter." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/68189032966925993169.

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碩士<br>逢甲大學<br>通訊工程學系<br>101<br>In this paper, a multi-band filter as the research subject, are three small size, simple structure, and low cost bandpass filters, are applicable to wireless local area networks (WLAN) and the worldwide interoperability for microwave access (WiMAX). In addition to develop can be individually applied to GSM1800 (1.71-1.88 GHz) band in the four band pass filter, and implemented in 0.8 mm thickness, dielectric coefficient is 4.4 on the FR4 substrate. First introduced for dual-band bandpass filter, using twoλ/2 stepped impedance resonators to design, through the

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Bakytbekov, Azamat. "Fully Printed 3D Cube Cantor Fractal Rectenna for Ambient RF Energy Harvesting Application." Thesis, 2017. http://hdl.handle.net/10754/626269.

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Internet of Things (IoT) is a new emerging paradigm which requires billions of wirelessly connected devices that communicate with each other in a complex radio-frequency (RF) environment. Considering the huge number of devices, recharging batteries or replacing them becomes impractical in real life. Therefore, harvesting ambient RF energy for powering IoT devices can be a practical solution to achieve self-charging operation. The antenna for the RF energy harvesting application must work on multiple frequency bands (multiband or wideband) to capture as much power as possible from ambient; it

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FAN, CHIH-WEI, and 范智偉. "Design of Multiband Coplanar slot antenna." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/63944947429000173611.

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碩士<br>明新科技大學<br>電機工程系碩士班<br>104<br>Coplanar slot antennas with three different shapes of radiator, comb, flag and polygon are designed in this thesis. Changing the element of comb radiator, the suitable size parameters are obtained from simulation. The simulated results are used to produce containing WLAN and LTE frequency bands antenna. Changing ground area of coplanar flag type radiator slot antenna is used to shift the impedance bandwidth to lower frequency. It can also be used to produce containing WLAN and LTE frequency bands antenna. Changing the bevel of polygonal radiator is used to ge

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Hsu, Ming-Ren, and 許銘仁. "Multiband Chip Antennas for Mobile Handsets." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/3uaq95.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>96<br>In this thesis, the study mainly focuses on developing multiband chip antennas for mobile handsets. Three possible solutions and their extended and integrated designs are presented. By using the dielectric material as the chip base, the chip antenna can be smaller in size and simpler in design. Most of the applications of the traditional chip antennas are rarely used as the mobile phone antenna and are commonly designed with a single operating band to cover GPS or WLAN operation only. Different types of the antennas are proposed in the thesis. The metal patte

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Chao, Chun-heng, and 趙君恒. "Study of multiband slot antenna designs." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/2gzp58.

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碩士<br>逢甲大學<br>電機工程所<br>100<br>The thesis focuses on the design of slot antennas. Here, two slot antennas were proposed with different fed-techniques that allow the antennas to operate at different applications. A microstrip-fed slot antenna design for WLAN（2.4/5.2/5.8 GHz）application was initially proposed. In order to achieve dual-band operation, three slots were embedded into the ground plane that located beneath the microstrip feed-line. Two of the loaded slots were of step-impedance (SI) designs, and the third one was an inverted L-shaped slot. The proposed antenna exhibited 10-dB bandwidt

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TIAN, CHANG-FU, and 田章甫. "Design of Multiband Planar Dipole Antenna." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/9tuy5f.

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碩士<br>明新科技大學<br>電機工程系碩士班<br>105<br>In this thesis, FR4 substrate and IE3D software are used to design multi-band antennas, including comb shaped with rectangular arm dipole antenna which can be applied to 1.8GHz,2.4GHz,2.45GHz and 2.6GHz frequency bands, comb shaped with needle arm dipole antenna which can be applied to 1.8GHz,2.4GHz,2.45GHz and 2.6GHz frequency bands, comb shaped with unequal rectangular arm dipole antenna which can be applied to 1.8GHz,2.4GHz,2.45GHz and 2.6GHz frequency bands , and comb shaped slot antenna which can be applied to 0.7GHz 0.9GHz and 1.8GH frequency bands. In

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Hsieh, Yuan-pu, and 謝沅圃. "Multiband CPW-fed slot antenna design." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/10018352714300872868.

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碩士<br>逢甲大學<br>電機工程所<br>98<br>The thesis focuses on the design of slot antennas and proposes a series of coplanar slot antennas with different structures by using a variety of design methods to meet different applicable frequencies. First, the thesis proposed a dualband coplanar triangle ring slot antenna. The lower band (2.34-2.8 GHz) is excited by the triangular ring slot and capacitive load, while the higher frequency band is excited by two T-slots embedded in the triangular radiation element, and its wide impedance bandwidth (5.15-6.9 GHz) is also due to the capacitive load. This novel ante

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Zeng, Jian-Hong, and 曾建弘. "Design of Multiband Planar MIMO Antenna." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/23593305021202076714.

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碩士<br>龍華科技大學<br>電子工程系碩士班<br>102<br>This thesis presents a compact multiband planar MIMO antenna that covers the standards of the Global System for Mobile (GSM), Long Term Evolution (LTE) and Ultra-Wideband (UWB). The MIMO antenna contains two printed back-to-back multiband monopole elements with a closed distance of one-tenth wavelength of 900MHz. The element in the MIMO antenna is structured by merging an UWB antenna and a parasitic multi-loaded winding line monopole that is capable of providing the broadband coverage for the standards of the GSM, LTE and UWB. The size of the antenna element

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Chen, Zhi-Ying, and 陳智穎. "Design of Printed Multiband LTE Antenna." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/u79ves.

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碩士<br>元智大學<br>通訊工程學系<br>106<br>With the rapid development of cellular communication and higher quality demands by the customers, the communication system has evolved to the fourth generation. Supporting multiple frequency bands in different regions becomes a must for the modern smart phone. In this thesis, a multiband printed antenna for Long-Term-Evolution(LTE) is presented. The proposed antenna is based on a ultra-wide band (UWB) planar triangular monopole antenna (PTMA) and have a volume of 60×100×1.6〖mm〗^3. The size of a PTMA is first enlarged to cover the target LTE multiple bands and a m

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S, Nagaveni. "Multiband and Broadband impedance matching network." Thesis, 2014. http://raiith.iith.ac.in/132/1/EE11M07.pdf.

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This thesis proposes parasitic aware design techniques for concurrent Multi-Band impedance matching networks. Different concurrent L-matching networks are analyzed and the substantial impact of component non-idealities on matching performance is addressed. To counter these impacts, the design methodology is modified and the improvement is verified for different concurrent dual-band networks. The same techniques are extended for quad band concurrent L-matching networks. The proposed parasitic aware methods are validated through practical components from Coilcraft and Murata libraries (offchip)

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Kalyan, Robin. "Reconfigurable concurrent multiband doherty power amplifier." Thesis, 2017. http://localhost:8080/iit/handle/2074/7413.

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YU, JIA-YI, and 余家一. "Designs on Multiband Antenna for LTE Applications." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/02510455459107705088.

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碩士<br>明新科技大學<br>電機工程系碩士班<br>104<br>In this thesis, coplanar waveguide feed and symmetrical ground are used to design the antenna. Chapter 3 and chapter 4 are themed with miniaturization, broadband and multi-band. Chapter 5 is focused on designing the antenna’s operating frequency bands which cover LTE 0.7/0.9/1.8/2.6GHz and WLAN 4.9GHz bands. In chapter 3, the radiator’s notch size parameter L5, the ground size parameters L2 and W2, and height of needle-shaped radiator H are changed to design the antenna which peak gain are 1.41dBi, 2.93dBi, 3.30dBi, 3.19dBi, 1.99dBi, 3.72dBi, 6.28dBi and 4.15

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Wu, Chih-Hsien, and 吳致賢. "Multiband Hybrid Internal Antennas for Mobile Phones." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/4mnwra.

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博士<br>國立中山大學<br>電機工程學系研究所<br>96<br>In this dissertation, a series of multiband hybrid mobile phone antennas, incorporating the electric-current and equivalent magnetic-current excitation mechanisms are presented. The design concept of the hybrid antenna is that the multiband operation is achieved by incorporating the resonant modes generated by the two above-mentioned excitation mechanisms. In the first and the second antenna designs, they are obtained by stacking the antennas using the electric-current and equivalent magnetic-current excitations, and both can achieve multiband operations. For

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Pan, Po-Yu, and 潘柏宇. "Study of Multiband Monopole Antenna for LTE." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/3jrg8n.

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碩士<br>義守大學<br>電機工程學系<br>102<br>Antenna device needs to be able to send and receive signals in wireless network communications. As technology advances, Mobile band from the early GSM 900/1800 (2G) and now widely used cellphone multimedia transmission UMTS 2100 (3G) and is developing LTE 700/900/1800/2600 (4G). This paper presents the multiband antennas applicable for LTE, this antenna have three- frequency band, the main design principles combined with G-type monopole antenna and L-type monopole antenna, with two different shapes monopole excitation frequency to complete. First, use of G-type m

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