Дисертації з теми "UWB APPLICATIONS"
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Ripoche, Olivier. "Miniaturisation d’antennes en bande VHF pour applications spatiales." Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/11383/1/ripoche_partie_1_sur_2.pdf.
Повний текст джерелаLiu, Li, and 劉荔. "Compact planar UWB antennas for wireless device applications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/207199.
Повний текст джерелаpublished_or_final_version
Electrical and Electronic Engineering
Doctoral
Doctor of Philosophy
Jose, Sajay. "Design of RF CMOS Power Amplifier for UWB Applications." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/36391.
Повний текст джерелаMaster of Science
Volos, Haris I. "Ultra Wideband Ranging and Link Budget Design for Naval Crane Applications." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33652.
Повний текст джерелаMaster of Science
Morsy, Mohamed Mostafa. "DESIGN AND IMPLEMENTATION OF MICROSTRIP MONOPOLE AND DIELECTRIC RESONATOR ANTENNAS FOR ULTRA WIDEBAND APPLICATIONS." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/dissertations/169.
Повний текст джерелаGao, Yang. "Robust cooperative positioning using DGPS and UWB for V2X applications." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/42843/.
Повний текст джерелаFabbri, Davide <1990>. "Energy Autonomous RF Tags for Sensing and UWB Localization Applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9610/1/Fabbri_Davide_tesi.pdf.
Повний текст джерелаZhao, Jun. "Silicon-Based RFIC Multi-band Transmitter Front Ends for Ultra-Wideband Communications and Sensor Applications." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28864.
Повний текст джерелаPh. D.
Rosales, Marc. "Study of SiGe HPT for radio over fiber applications." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1101/document.
Повний текст джерелаThis research is focused on the study of silicon germanium based heterojunction bipolar phototransistors (SiGe HPTs) implemented in an 80GHz SiGe Bipolar process technology. It's application in a radio over fiber system for home area networks are investigated. RoF for Home area networks are envisioned to implemented with a minimal system cost. Operation at 850nm is identified as a critical parameter to achieve this goal. Low cost off the shelf optical components are readily available at this wavelength. The use of multi mode fibers (MMF) as opposed to higher cost single mode fiber (SMF) is sufficient for the bandwidth requirements in a home network environment. A monolithically integrated OE receiver chip would help in the overall reduction of the system cost by having the optical detector in the same chip with the electronic circuits. We have designed and implemented three terminal HPT (3T-HPT) structures. The two main groups of the HPT structures are: 1) HPTs with extended Base and Collector regions (xBC HPT) and 2) HPTs with extended Emitter, Base and Collector regions (xEBC HPT). Variations to improve optical coupling the though optimizations in the vertical stack and lateral size of the HPT. The measurements and characterization showed that all the structures are compatible with the process technology. The type of biasing used in the base of the HPT also influences the HPT performance. A constant current (CC) bias has higher extracted DC responsivity as compared to a constant voltage (CV) bias. The effects of the different passive base loads on the HPT responsivity are studied through simulation and measurement of fabricated circuits. The impedance presented on the base has a great influence on the HPT responsivity. The performance of an HPT as circuit component is studied using different HPT-HBT pair configurations. Tests and measurements verify that improvement in the classical transistor pair configurations are also present in the opto microwave response of the HPT-HBT pair. Finally, SiGe hpt is used in the development of a ROSA module for a radio over fiber systems for home area network
Choudhary, Vipin. "Nondestructive testing and antenna measurements using UWB radar in industrial applications." Licentiate thesis, KTH, Teknisk informationsvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291129.
Повний текст джерелаMånga branscher ersätter snabbt de manuella testoperationerna och går mot automatiserad drift med modern teknik. Modern teknik såsom digitalkameror, soniska sensorer, infraröda sensorer och radar och lidarsystem används för i icke-förstörande tester. Bland alla olika sensorerhar radarsystem förmågan att tränga igenom byggda strukturer (dielektriskmaterial), vilket gör dem flexibla och lämpliga för ett brettspektrum av industriella och militära applikationer vid icke-förstörande avkänning. Sådana exempel är upptäckt av skador vid tillverkning av varor, övervakning av hälsa hos många strukturer, detektering av objekt genom väggen av säkerhetsskäl etc. Speciellt är radarsystem med ultrabredband (UWB) fördelaktiga då de ger hög mätnoggrannhet och samtidigt minskad känslighet mot passiva störningar (såsom regn, rök,dimma etc.), och immunitet mot yttre strålning och buller. Syftet med denna avhandling är : I) att undersöka elektriskt små dolda struktur med syntetisk bländaradar (SAR), II) att bestämma komplex brytningsindex för objekt som använder UWB radarsystem, ochIII) att svar på frågan hur vi kan minska den ömsesidiga kopplingen(överhörning) i ett UWB radarsystem med sändar- och mottagarantenner nära varandra. I mål I, är målet icke-förstörande provning avbyggda struktures såsom vid tillverkning av betongplattor eller vid renovering. I tillägg kunde inte elektriskt små strukturer och deras inre struktur urskiljas i konventionella SAR-bilder. Den föreslagna polarimetriskaanalysmetoden visar på hur användbar singulärvärdesuppdelning(SVD) med bakåtprojektion (BPA) är för att få information om och för att klassificera elektriskt små objekt.Vidare i denna avhandling visas för mål II en ny metod för att bestämma komplexa brytningsindex (eller motsvarande komplexa relativa permittiviteten) hos objekt med plana ytor. Den föreslagna metoden är relativt okänslig för svagheter hos hårdvaran, såsom frekvensberoende hos antennener och analog front-end. Objekten kan vara av ändlig storlek och på ändligt avstånd. Begränsningarna i storlek och avstånd för metoden att vara giltig undersöktes experimentellt. Sålunda är metoden utformad för industriella mätningar på föremål på transportband. I de följande delarna av avhandlingen - mål III - undersöker och visar vi dessutom hur en absorbator för mikrovågor, baserad på metamaterial, kan användas för att förbättra prestanda hos ett radarsystem för korta avstånd, när absorbatorn placeras mellan sändar- och mottagantenner. Resultatet blir att felet i det bestämda avståndet till målet minskar och undertryckning av klotter ökar.
QC 20210309
Ahmed, Amr. "Design And Optimization Of Uwb Antenna For Air Coupled Gpr Applications." ScholarWorks @ UVM, 2014. http://scholarworks.uvm.edu/graddis/262.
Повний текст джерелаSalmani, Zeeshan. "Design and Implementation of Broad Band and Narrow Band Antennas and Their Applications." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc84270/.
Повний текст джерелаNikolaou, Symeon. "Design and implementation of compact reconfigurable antennas for UWB and WLAN applications." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/24802.
Повний текст джерелаCommittee Chair: Manos M. Tentzeris; Committee Co-Chair: John Papapolymerou; Committee Member: Andrew F. Peterson; Committee Member: Chang-Ho Lee; Committee Member: John D. Cressler; Committee Member: Joy Laskar.
Barrett, Luke. "UWB radiolocation technology: Applications in relative positioning algorithms for autonomous aerial vehicles." Thesis, Barrett, Luke (2018) UWB radiolocation technology: Applications in relative positioning algorithms for autonomous aerial vehicles. Honours thesis, Murdoch University, 2018. https://researchrepository.murdoch.edu.au/id/eprint/41905/.
Повний текст джерелаDubouloz, Samuel. "Développement d'architectures avancées pour communications ultra large bande (UWB) dans des applications bas débit." Phd thesis, Télécom ParisTech, 2008. http://pastel.archives-ouvertes.fr/pastel-00003907.
Повний текст джерелаZang, Yuzhang. "UWB Motion and Micro-Gesture Detection -Applications to interactive electronic gaming and remote sensing." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-theses/1241.
Повний текст джерелаCondict, Nahlah. "EXPERIMENTAL ANALYSIS OF MULTI-PURPOSE UWB RF SYSTEM FOR AD-HOC RADAR SENSOR NETWORK APPLICATIONS." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1533915320524546.
Повний текст джерелаSonkki, M. (Marko). "Wideband and multi-element antennas for mobile applications." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526201085.
Повний текст джерелаTiivistelmä Väitöskirjassa esitetään uusia laajakaistaisia ja monielementtiantenneja matkaviestimiin. Väitöskirja koostuu neljästä pääalueesta: pintavirtojen muototeoria, laajakaistaiset antennit, monielementtiantennit sekä laajakaistaiset monielementtiantennit. Teoriaosassa säteilykenttiä on aluksi tutkittu pallon pinnalla sekä skalaaripotentiaaleina että pintavirtavektoreina, jonka jälkeen niitä on verrattu mobiilin laitteen maatason ominaispintavirtojen synnyttämiin säteilykenttiin. Teoriaosassa osoitetaan, että pallon pinnalla sekä tasomaisella suorakaiteen muotoisella pinnalla on mahdollista herättää samat säteilykentät. Myöhemmin väitöskirjassa esitettävien uudenlaisten antennirakenteiden ominaisuuksia verrataan teoriaosassa esitettyihin pintavirtoihin ja säteilykenttiin. Teoriaosuuden jälkeen osoitetaan miten säteilevä sähkömagneettinen kenttä saadaan herätettyä laajalla taajuusalueella. Tähän on otettu kaksi eri lähestymistapaa, joista ensimmäisessä esitellään ja tutkitaan kvasikomplementaarista antennirakennetta (QCA). Kvasikomplementaarisessa antennirakenteessa sisääntuloimpedanssin imaginaariosa kompensoidaan yhdistämällä sähköinen johde ja magneettinen rako samaan antenniin. Samanaikaisesti perusmuoto herätetään laajalla taajuusalueella, jolla varmistetaan antennin hyvät säteilyominaisuudet koko toimintataajuusalueella. Toisessa lähestymistavassa käytetään kahta symmetrisesti asetettua antennielementtiä, joita syötetään symmetrisesti samalla amplitudilla ja vaiheella. Kun sähkömagneettinen kenttä herätetään symmetrisesti, korkeamman kertaluvun muotojen herättäminen voidaan välttää laajalla taajuusalueella. Symmetrisesti syötetyillä antennirakenteilla saavutettu -6 dB suhteellinen impedanssikaistanleveys on 37.5–80 %. Useita syöttöelementtejä käytettäessä voidaan mobiilin laitteen maatasossa herättää yhdellä pistetaajuudella monta toisistaan riippumatonta säteilykenttää. Koska herätetyt kentät ovat toisistaan riippumattomia, on niiden välinen korrelaatio myös pieni. Kyseisellä rakenteella on mahdollista toteuttaa säteilykuviodiversiteetti erittäin pienessä tilassa, kuten matkapuhelimessa. Toisaalta, kun yhdistetään kaksi QCA-elementtiä yhdeksi monielementtiratkaisuksi, voidaan toteuttaa laajakaistainen diversiteettiantenni, jonka suhteellinen -6 dB impedanssikaistanleveys on 87.5 %. Vastaavasti kahdella laajakaistaisella QCA-elementillä toteutetulla MIMO-ratkaisulla päästään 95 % suhteelliseen -6 dB impedanssikaistanleveyteen. Molemmilla ratkaisuilla on erittäin hyvät säteilyominaisuudet sekä alhainen korrelaatio ja pieni keskinäiskytkentä antennielementtien välillä. Suunniteltaessa toimivaa laajakaistaista antennirakennetta, on tärkeää ottaa huomioon antennisyötön impedanssisovitus, jotta antennin suorituskyky ei heikkenisi. Lisäksi balansoidussa rakenteissa tulee olla laajakaistainen baluni, jolla vältetään säteilykuvion vääristyminen. Väitöskirjan syöttöratkaisuissa on käytetty kaupallisia sähkömagneettisia simulaattoreita, joilla antennirakenne voidaan mallintaa kolmiulotteisesti, ja joilla laajakaistainen syöttö saadaan optimoitua haluttuun antenniin. Suurin osa esitellyistä antennirakenteista on simulointien lisäksi myös mitattu, jolloin niiden toimivuus käytännössä pystytään todentamaan rakentamalla prototyyppiantenni. Yleisesti väitöskirjassa esitellään tasomaisia antenniratkaisuja johtavassa maatasossa, joissa säteilevät pintavirrat herätetään mahdollisimman laajalla taajuusalueella. Ideana on löytää laajakaistaisia antenni- ja syöttörakenteita, joilla saadaan herätettyä perusmuoto tai jokin muu haluttu muoto. Ajatuksena on välttää korkeamman kertaluvun muotojen herättäminen, jotka voivat pilata antennin suorituskyvyn. Väitöskirjassa osoitetaan myös, että pienikokoisella antennilla on mahdollista herättää korkeamman kertaluvun muotoja pistetaajuudella käyttämällä useita heräte-elementtejä
Pardiñas, Mir Jorge Arturo. "Contribution à l'étude de la détection des signaux UWB. Etude et implémentation d'un récepteur ad hoc multicapteurs. Applications indoor de localisation." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00814663.
Повний текст джерелаPepe, Domenico. "Deep sub-micron RF-CMOS design and applications of modern UWB and millimeter-wave wireless transceivers." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13815/document.
Повний текст джерелаThe research activity carried out during this PhD consists on the design of radio- frequency integrated circuits, for ultra-wideband (UWB) and millimeter-wave sys- tems, and covers the following topics: (i) radio-frequency integrated circuits for low-power transceivers for wireless local networks; (ii) fully integrated UWB radar for cardio-pulmonary monitoring in 90nm CMOS technology; (iii) 60-GHz low noise amplifer (LNA) in 65nm CMOS technology
Chirala, Mohan Krishna. "Passive and active circuits in cmos technology for rf, microwave and millimeter wave applications." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2069.
Повний текст джерелаShen, Jue. "Interactive RFID for Industrial and Healthcare Applications." Doctoral thesis, KTH, Industriell och Medicinsk Elektronik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174380.
Повний текст джерелаQC 20151012
Zhao, Yan. "Numerical Modelling of Material Dispersions for UWB and Metamaterial Applications Using the Finnite-Difference Time-Domain Method." Thesis, Queen Mary, University of London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498165.
Повний текст джерелаAddepalli, T., A. Desai, Issa T. Elfergani, N. Anveshkumar, J. Kulkarni, C. Zebiri, J. Rodriguez, and Raed A. Abd-Alhameed. "8-Port Semi-Circular Arc MIMO Antenna with an Inverted L-Strip Loaded Connected Ground for UWB Applications." MDPI, 2021. http://hdl.handle.net/10454/18536.
Повний текст джерелаMultiple-input multiple-output (MIMO) antennas with four and eight elements having connected grounds are designed for ultra-wideband applications. Careful optimization of the lines connecting the grounds leads to reduced mutual coupling amongst the radiating patches. The proposed antenna has a modified substrate geometry and comprises a circular arc-shaped conductive element on the top with the modified ground plane geometry. Polarization diversity and isolation are achieved by replicating the elements orthogonally forming a plus shape antenna structure. The modified ground plane consists of an inverted L strip and semi ellipse slot over the partial ground that helps the antenna in achieving effective wide bandwidth spanning from (117.91%) 2.84–11 GHz. Both 4/8-port antenna achieves a size of 0.61 λ × 0.61 λ mm2 (lowest frequency) where 4-port antenna is printed on FR4 substrate. The 4-port UWB MIMO antenna attains wide impedance bandwidth, Omni-directional pattern, isolation >15 dB, ECC 4.5 dB making the MIMO antenna suitable for portable UWB applications. Four element antenna structure is further extended to 8-element configuration with the connected ground where the decent value of IBW, isolation, and ECC is achieved.
Ripoche, Olivier. "Miniaturisation d'antennes en bande VHF pour applications spatiales." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2013. http://tel.archives-ouvertes.fr/tel-00938676.
Повний текст джерелаElfergani, Issa T. "Investigation, design and implementation of frequency tuneable antennas for mobile handset and UWB applications : simulation and measurement of tunable antennas for handheld mobile handsets and UWB system, investigations of frequency tuneable range, antenna radiation performance and antenna design optimisation using parametric studies." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/13761.
Повний текст джерелаPark, Yunseo. "Direct Conversion RF Front-End Implementation for Ultra-Wideband (UWB) and GSM/WCDMA Dual-Band Applications in Silicon-Based Technologies." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7563.
Повний текст джерелаZaikou, Yahor [Verfasser], Reiner [Akademischer Betreuer] Thomä, Dusan Gutachter] Kocur, and Uwe [Gutachter] [Pliquett. "Microwave UWB sensors for measurements under non-stationary conditions : detection of human being beneath rubble for rescue applications / Yahor Zaikou ; Gutachter: Dusan Kocur, Uwe Pliquett ; Betreuer: Reiner Thomä." Ilmenau : TU Ilmenau, 2018. http://d-nb.info/1178129004/34.
Повний текст джерелаGhavami, Navid. "Ultra-wideband imaging techniques for medical applications." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:6f590d26-ee7c-41d7-a89b-393c864c9d82.
Повний текст джерелаWaqar, Adnan. "Enhancing the capabilities of electronic performance tracking system for applications in sports." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2562.
Повний текст джерелаLopez-Castellanos, Victor. "Ultrawideband Time Domain Radar for Time Reversal Applications." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1301040987.
Повний текст джерелаGuardiola, Garcia Marta. "Multi-antenna multi-frequency microwave imaging systems for biomedical applications." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/134967.
Повний текст джерелаLepage, Anne Claire. "Analyse et optimisation d'antennes tridimensionnelles : applications à la conception d'antennes compactes intégrées dans un système de communication ultra-large bande." Phd thesis, Télécom ParisTech, 2005. http://pastel.archives-ouvertes.fr/pastel-00002238.
Повний текст джерелаSanthanam, Manisundaram. "UWB technology and its application." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Data- och elektroteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-16970.
Повний текст джерелаElmegri, Fauzi O. M. "Model and design of small compact dielectric resonator and printed antennas for wireless communications applications : model and simulation of dialectric resonator (DR) and printed antennas for wireless applications : investigations of dual band and wideband responses including antenna radiation performance and antenna design optimization using parametric studies." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14742.
Повний текст джерелаElmegri, Fauzi. "Model and design of small compact dielectric resonator and printed antennas for wireless communications applications. Model and simulation of dialectric resonator (DR) and printed antennas for wireless applications; investigations of dual band and wideband responses including antenna radiation performance and antenna design optimization using parametric studies." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14742.
Повний текст джерелаGeneral Secretariat of Education and Scientific Research Libya
Tall, Ndiogou. "Etude et réalisation de circuits de récupération d'horloge et de données analogiques et numériques pour des applications bas débit et très faible consommation." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4717.
Повний текст джерелаClock and data recovery circuits are required in many wireless communication systems. This thesis is about development of such circuits with: firstly, the realization, in HCMOS9 0.13 μm of STMICROELECTRONICS technology, of 1 and 54 Mb/s analog CDR circuits, and secondly, the implementation of programmable digital circuits at low rates. In the aim of an impulse UWB transceiver dealing with video transmission, a CDR circuit at 54 Mb/s rate has been realized to provide clock signal synchronously with narrow pulses (their duration is about a few nanoseconds) from the energy detector. Another CDR circuit has been built at 1 Mb/s rate in a non-coherent IR- UWB receiver power management context. Both circuits have been implemented as 3rd order analog PLL. In this work, a phase comparator suitable for “RZ low duty cycle” data from the energy detector has been proposed. Circuits have been sized to obtain very good performances in terms of jitter and power consumption. Particularly, measured performances of the 1 Mb/s CDR circuit allow to plan an efficient power management (a decrease of more than 97% of the receiver total power consumption). In the context of a telemetry system from aircraft to ground, two digital CDR circuits have also been implemented. A second order digital PLL has been adopted in order to provide synchronous clock and data to an SOQPSK digital transmitter. Also, a digital ELGS circuit has been proposed to work in a PCM/FM receiver. For both CDR structures, the input signal rate is programmable and varies globally from 1 to 30 Mb/s
BABIKER, ALADDIN. "DESIGN MIMO ANTENNA FOR UWB APPLICATIONS." Thesis, 2019. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16817.
Повний текст джерелаWANG, LE-YU, and 王樂彧. "A Study of Antennas for Wireless USB Dongle and UWB Applications." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/up43nq.
Повний текст джерела明志科技大學
電機工程系碩士班
104
In recent years, wireless communication have been a necessary research topic due to get better communication quality, and develop a faster and convenient wireless network.Two antennas have been proposed in the paper, they are triple band suited for USB application and symmetric slot-type UWB antenna. The first one is USB antenna, occupies a area of 10× 10mm2 and its impedance band width covering 2.3-2.69GHz、3.3-3.7GHz and 5.15-5.85GH based on return loss > 10dB. The antenna is designed at a monopole type with branches and etched on a 0.8mm thick FR4 Substrate. By using the monopole design to excite three wide-band, its resonant electrical-lengths are calculated about λ/4 at operating frequencies and to satisfy the working frequency band of our design target. The second antenna, a symmetric slot-type UWB antenna, occupies a area of 28×20mm2 and covers a operating band from 3.1-10.6GHz, To avoiding the interferences resulting existing 3.4-3.7GHz and 5.15-5.85GHz, two notched bands functions are designed. The overall antenna is designed based on a rectangular shape, adopting a back-side substrate to couple each other and reaching our target by using two slots design. The mentioned above two antennas are designed by using a tool of Ansoft HFSS to simulate return loss and impedance characteristics, and then using a precise network analyzer Agilent E8362B and etching machine LPKF E33 to finish two antennas the simulated and tests , and that they are worth of prove commercial values.
Mandalanka, Anil Kumar. "UWB pulse generation for GPR applications." Thesis, 2013. http://ethesis.nitrkl.ac.in/5020/1/UWB_PULSE_GENERATION_FOR_GPR.pdf.
Повний текст джерелаElmegri, Fauzi, Chan H. See, Raed A. Abd-Alhameed, Chemseddine Zebiri, and Peter S. Excell. "Dielectric resonator antenna design for UWB applications." 2013. http://hdl.handle.net/10454/9648.
Повний текст джерелаA small dielectric resonator antenna has been designed for ultra wideband (UWB) communication system applications. The antenna element is a rectangular low permittivity ceramic block, with a dielectric constant of 9.4, and the modified T-shaped feed network includes a 50 ohm microstrip line to achieve strong coupling, and some bandwidth enhancement. The antenna performance is simulated and measured over a frequency band extending from 3100 MHz to 5500 MHz; the impedance bandwidth over this interval is 55.8% with VSWR <; 2, making the antenna suitable for UWB applications.
Shah, Akshat, and Kaveesh Sharma. "Design of Rectangular DRA for UWB Applications." Thesis, 2012. http://ethesis.nitrkl.ac.in/3587/1/Final_THESIS.pdf.
Повний текст джерелаPrusty, Abhisek. "GPR applications by using UWB pulse generation." Thesis, 2014. http://ethesis.nitrkl.ac.in/6508/1/E-18.pdf.
Повний текст джерела連崇哲. "Design and Applications of Band Notched UWB Antenna." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/51688514045360424932.
Повний текст джерела逢甲大學
電機工程學系
101
This paper presents five monopole antennas with three-tier small semicircles for ultra-wideband operation. The main configuration of this Ultra-Wide-Band(UWB) antenna is categorized as a kind of rectangular monopole antenna. Analyzing the current distribution and some parameters such as the size, feeding line width, ground width, radiator, taper and slot of antennas, we experimentally and technically discuss how to adequately affect the antenna’s return loss (S11). Ultra-wideband (UWB) applications a bandwidth of 3.1 GHz ~ 10.6 GHz, the return loss is less than -10 dB in the range of 7.5 GHz bandwidth. The monopole antenna with three-tier small semicircles which can get wider bandwidth is done by etching process on the FR4 substrate with 1.6mm in thickness and 4.4 relative permittivity. For designing process is divided into three parts, the 50-ohm impedance feeding line is connected to the larger semicircle which the fundamental mode is 3GHz, firstly. Secondly, considering four, eight and sixteen semicircles with their radius are 1/4, 1/8, 1/16 times greater than the larger semicircle&;#39;s radius, and then place them above the larger semicircle. Finally, the larger rectangle on opposite sides of the FR4 PCB. The S11 frequency response , radiation patterns, power gain, group delay, received pulse response, and phase change are also investigated. The relevant research reports can prove that a monopole antenna with three-tier small semicircles are very suitable for applications in ultra-wideband short-range wireless devices and apply to medical image.
Lashab, Mohamed, Hmeda I. Hraga, Raed A. Abd-Alhameed, Chemseddine Zebiri, F. Benabdelaziz, and Steven M. R. Jones. "Horn Antennas Loaded with Metamaterial for UWB Applications." 2011. http://hdl.handle.net/10454/5466.
Повний текст джерелаIn this paper, a conical horn antenna has been designed for Ultra-Wideband ap-plications by loading its section with a metamaterial. The work aims first to compare results obtained by the wavelet-moment method to a simulation performed using HFSS. Secondly the conical horn is loaded with a very thin layer of metamaterial to enhance the radiation pattern and the bandwidth performance of the conical horn antenna and reduce the size of the antenna. The operating bandwidth of the proposed antenna is in the range of 10{13 GHz. The results obtained from HFSS and moment method are in good agreement.
Electronics and Telecommunications
Ramesh, Vankudothu. "Design of Dielectric Resonator Antennas for UWB Applications." Thesis, 2016. http://ethesis.nitrkl.ac.in/9155/1/2016_MT_VRamesh.pdf.
Повний текст джерелаTai-Shun, Fu, and 傅泰順. "Design of RF Front-end Circuits for UWB Applications." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/11071089027403745453.
Повний текст джерела長庚大學
電子工程研究所
94
Abstract This thesis presents the development of IEEE 802.15.3a UWB RF front-end circuit with TSMC 0.18µm standard CMOS technology. The study is to integrate the transceiver circuit into a single chip to benefit the integration of the base-band circuit and to realize the manufacture of SoC (System on a Chip). Hence, the manufacturing cost can be reduced considerably. This thesis contains three parts, including power amplifier, low noise amplifier and down conversion mixer. Planning the arrangement of the system, the RF frequency range is 3.1 to 10.6 GHz. The supply voltage is 1.8V. The base-band frequency is 100MHz. In this thesis, power amplifier has a gain of 13.5dB and output power of about 12dBm. Input and output return losses are smaller than those of -10dB and -5.4dB, respectively. P1dB and IIP3 are -7dBm and 7.7dBm, respectively. PAE and power consumption are 28%, 40mW, respectively. Low noise amplifier has a gain of 11dB and noise figure is smaller than 4.5dB. Input and output return losses are smaller than -10dB and -11.5dB, respectively. P1dB and IIP3 are -12dBm and -7.4dBm, respectively. Power consumption is 13mW. Down conversion mixer has a conversion gain of 5dB and single-sideband noise figure is smaller than 13dB. Return loss of RF Port is smaller than -8.3dB. Return loss of IF port is -18.6dB. P1dB and IIP3 are -11dBm and -8dBm, respectively. Power consumption is 29.16mW. The circuits are simulated by Advanced Design System (ADS) and TSMC 0.18µm 1P6M CMOS process.
Kianpour, Iman. "Design of a low power transmitter for UWB applications." Doctoral thesis, 2019. https://hdl.handle.net/10216/123604.
Повний текст джерелаKu, Kuang Yuan, and 古光原. "Small open slot antenna for WLAN/WiMAX/UWB applications." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/51129656783883170937.
Повний текст джерела南台科技大學
電子工程系
95
In this thesis, we proposed open slot antenna designs, including band-rejected and enhance bandwidth for WLAN, WiMAX and UWB applications. In practical applications, broadband antenna must use filter to suppress dispensable bands lead to increase cost. First, the broadband characteristic (2.3~6.1GHz) of open slot antenna design with small size is proposed. Then, by inserting strip on printed open slot of the broadband antenna to reject dispensable bands, a dual-broadband design of the open slot antenna with small size is obtained for WLAN applications in the 2.4/5GHz bands. Furthermore, inserting two strips of different length on open slot antenna to rejected dual-band, a three-band antenna is achieved. By adjusting the dimension of two strips on open slot antenna, a three operating modes frequencies at 2.5/3.5/5.5 GHz for WiMAX (Worldwide Interoperability for Microwave Access) application has been obtained. Finally, a novel open slot antenna for bandwidth enhancement is presented. The bandwidth enhancement of the proposed antenna is achieved by cutting two notches along the invert-L shape open slot in the ground plane. The frequency range of the proposed antenna is from 2.3 to 10.9 GHz, which can cover UWB frequency range (3.1~10.6 GHz).
Chen, Wei-Chih, and 陳韋志. "The Research of Antenna for WLAN/ WiMax / UWB Applications." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/31273920560392101394.
Повний текст джерела崑山科技大學
電腦與通訊研究所
100
The main proposal for this thesis is three antenna types, one of which is the asymmetric monopole antenna. This antenna structure is to create the broadband impedance match by feeding it through the middle of a two-tier board. In addition to this is the smaller radiator has been fitted with an open slot to expand the bandwidth of the high frequency oscillation. As a result the entire design of this antenna can achieve the dual-band and broadband characteristics, including the frequency range of 2.31-3.83GHz and 4.88-6.0GHz. This antenna can also be applied to the WLAN and WiMAX systems. The second structure is the monopole antenna, which is connected by the gap between the symmetrical bevel ground and the radiator to create an oscillation broadband. Then through the ground ladder grove it will allow the antenna to achieve Ultra-wideband features, including the frequency range of 2.3-15.28GHz and usable in the WLAN, WiMAX and UWB bands. The third structure is the patch antenna. It is constructed by using the square radiator and a U slot type of the ground. This is due to the box design which allows the antenna field type radiation pattern to go up and high-gain characteristics. It has the frequency range of 2.34-2.52GHZ and it can be used in the WLAN band. In this thesis, these three antenna structures, bandwidth, gain value and the radiation patterns provide comparing results such as simulation and implementation upon discussion.