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Dissertations / Theses on the topic 'Uda-yagi'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Křepela, Pavel. "Yagi-Uda antény v planárním a drátěném provedení." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316421.

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This work deals with the study of Yagi-Uda antennas, followed by analysis and design of planar antenna with wired reflector. The first part focused on the analysis of the antenna and parameters. Another part of the continuing investigation of the optimum parameters for a given antenna followed by a design in Wi-Fi 5 GHz band. The antenna is simulated in CST Microwave Studio. The final part devoted the results achieved

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2

Velásquez, Silva Jhoel. "Optimización del diseño de antenas Yagi-Uda usando algoritmos genéticos." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2013. http://tesis.pucp.edu.pe/repositorio/handle/123456789/4846.

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El ser humano desde siempre ha tenido la necesidad innata de comunicarse en cualquier lugar y en cualquier momento. Esto ha impulsado un desarrollo asombroso en el área de las telecomunicaciones y especialmente en los últimos 30 años, en los cuales se han logrado tales avances en esta área de la ingeniería que a esta etapa de la historia de la humanidad se le ha denominado como la “era de las comunicaciones”. Hace más de un siglo que Hertz demostró la posibilidad de enviar ondas electromagnéticas de un punto al otro vía inalámbrica. Menos de una década después, Marconi puso en marcha la primer

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3

Mohamed, Younes. "Design and Application of a New Planar Balun." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500144/.

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The baluns are the key components in balanced circuits such balanced mixers, frequency multipliers, push–pull amplifiers, and antennas. Most of these applications have become more integrated which demands the baluns to be in compact size and low cost. In this thesis, a new approach about the design of planar balun is presented where the 4-port symmetrical network with one port terminated by open circuit is first analyzed by using even- and odd-mode excitations. With full design equations, the proposed balun presents perfect balanced output and good input matching and the measurement results ma

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4

Goncharova, Iuliia. "Investigation of a small-sized omnidirectional antenna." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-17835.

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The purpose of this research is to find ways to create an omnidirectional antenna with high directivity in the vertical plane. The investigation is based on computer simulation using the program CST 2011. The objective is a narrow-band antenna that is omnidirectional in the horizontal plane and has maximum achievable directivity for a fixed size. Three of the most promising antenna designs are selected based on the current state of antenna technology. Their maximum directivities are estimated by means of well known relations in antenna theory. It is shown that the most suitable design is an om

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5

Davids, Vernon Pete. "Design and Implementation of an Integrated Solar Panel Antenna for Small Satellites." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/3044.

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Thesis (PhD (Electrical Engineering))--Cape Peninsula University of Technology, 2019<br>This dissertation presents a concept for a compact, low-profile, integrated solar panel antenna for use on small satellites in low Earth orbit. To date, the integrated solar panel antenna design approach has primarily been, patch (transparent or non-transparent) and slot radiators. The design approach presented here is proposed as an alternative to existing designs. A prototype, comprising of an optically transparent rectangular dielectric resonator was constructed and can be mounted on top of a solar panel

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6

Volpe, Giorgio. "Nanoscale spatial control of light in optical antennas." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/96168.

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El control dinámico y determinístico de la luz en una escala espacial por debajo de la longitud de onda es un requisito clave para ampliar los conceptos y las funcionalidades de la macro-óptica hasta la escala nanométrica. Un mayor nivel de control también tendrá implicaciones importantes en nuestra comprensión de los fenómenos ópticos en la nanoescala. Uno de los principales problemas en nano-óptica tiene como objetivo describir cómo y con qué precisión es posible controlar la distribución espacial de la luz de forma dinámica en la nanoescala. Desafortunadamente, un límite fundamental de la f

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7

Trubák, Jan. "Anténa pro RFID čtečku." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316414.

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This thesis is focused on the design of the antenna to a specific application XY. Emphasis is placed on a narrow antenna beam width, which will ensure full-fledged profit for the tag directly below the antenna. This thesis presents a total of five proposals that could be used by XY application. This thesis also presents the results of field measurements, which confirm the improved characteristics of the antenna with parasitic patch.

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8

Modaresi, Mahyar. "System and Method for Passive Radiative RFID Tag Positioning in Realtime for both Elevation and Azimuth Directions." Thesis, KTH, Communication Systems, CoS, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24562.

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<p>In this thesis, design and realization of a system which enables precise positioning of RFID tags in both azimuth and elevation angles is explained. The positioning is based on measuring the phase difference between four Yagi antennas placed in two arrays. One array is placed in the azimuth plane and the other array is perpendicular to the first array in the elevation plane. The phase difference of the signals received from the antennas in the azimuth array is used to find the position of RFID tag in the horizontal direction. For the position in the vertical direction, the phase difference

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9

Minář, Petr. "Nelineární řízení komplexních soustav s využitím evolučních přístupů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-364594.

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Control theory of complex systems by utilization of artificial intelligent algorithms is relatively new science field and it can be used in many areas of technical practise. Best known algorithms to solved similar tasks are genetic algorithm, differential evolution, HC12 Nelder-Mead method, fuzzy logic and grammatical evolution. Complex solution is presented at selected examples from mathematical nonlinear systems to examples of anthems design and stabilization of deterministic chaos. The goal of this thesis is present examples of implementation and utilization of artificial algorithms by mult

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10

Tsai, Jui-Te, and 蔡瑞得. "Design of Planar Microstrip Yagi-Uda Antenna." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/47841867996894364644.

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碩士<br>國立中正大學<br>通訊工程學系<br>98<br>In this thesis, two types of planar microstrip Yagi-Uda antenna fabricated on a FR4 substrate are investigated. The design is based on the planar half wavelngth dipole antenna with directing elements to form the high gain antenna. The first planar microstrip Yagi-Uda antenna was designed at 2.4 GHz for IEEE 802.11 b/g/n WLAN which has the return loss of 13.3 dB and antenna gain of 9.36 dBi and the bandwidth of 500 MHz. The second Yagi-Uda antenna has the bandwidth extention for IEEE 802.11 b/g/n WLAN, IEEE802.16 WiMAX , and 3GPP LTE applications, there measured

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11

Wang, Yao-Ting, and 王耀廷. "Yagi-Uda Antenna for DTV Signal Reception." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/3v7z5v.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>100<br>Thesis Title: Yagi-Uda Antenna for DTV Signal Receptions Pages：108 School: National Taipei University of Technology Institute: Institute of Computer and Communication Engineering Date: July 2012 Degree: Master Graduate Student: Yao-Ting Wang Advisor: Cheng-Chieh Yu, Provost, Prof., Ph.D. Keywords: DVB-T, Yagi-Uda Antenna, Dipole Antenna, UHF Band This paper presents a digital antenna, and designed to meet the global digital television broadcast receiver (470MHz ~ 860MHz) Yagi antenna. FR4 printed circuit boar

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12

Lee, Kang-Ming, and 李康銘. "Microstrip Yagi-Uda Antenna Design and Research." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/59386867820087199445.

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碩士<br>臺北城市科技大學<br>資訊應用產業碩士專班<br>103<br>Yagi-Uda antenna is a typical directional antenna, from national defense, down to the common people, it is widely used in radar, communication and other radio technical equipment. If you want to improve radiation response and characteristics of the antenna, you can properly adjust the element (or rod) length and the distance between element and element. But Yagi-Uda antenna’s design have some disadvantages, such as narrow bandwidth, anti-interference performance is relatively poor. And Yagi-Uda antenna only can achieve end-fire radiation, it is not able t

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13

Tsai, Ming-Hung, and 蔡銘竑. "Design of Directional Yagi-Uda Antenna Operating at 38GHz." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/34193366293638896510.

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碩士<br>元智大學<br>通訊工程學系<br>104<br>At 1953 PCB design of strip line and PCB type antenna was start and application. This type will be reduce antenna cost and design spacing of antenna, and RF signal use strip line director transmission to antenna very simple and easy to maching antenna and strip line between, not need another coaxial cable and connector, will be reduce signal loss by coaxial cable and miss matching of the connector. Result will be down cost and process sequence without PCB. Radio frequency communications for 5G generations antenna design will be studying, when data transmission wi

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14

Jheng, Huan-Yu, and 鄭煥宇. "Enhanced Yagi-Uda Antenna Design With GPS and WLAN Capabilities." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/14357222169960414411.

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碩士<br>樹德科技大學<br>電腦與通訊系碩士班<br>102<br>This study proposed an enhanced Yagi-Uda antenna that was compatible with GPS and WLAN. The antenna had two designs, showing omnidirectional and directional radiation patterns respectively. Moreover, this study examined the influence of the addition of a directional device on the radiation pattern and introduced three highly directional antenna designs.The first antennal system design adopted a symmetric trapezoid as the dipole antenna unit. By placing reflective metal ground plane of the same form at a certain spacing, an antenna system that was operated on

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15

Tai, Chen-Fang, and 戴禎坊. "Vertical Stacked Yagi-Uda Antenna Embedded-in LTCC Substrate for 60GHz Application." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/08136811855346162131.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>98<br>Yagi-Uda is one of the most popular antennas for all applications. It usually has three parts, including a radiator, several directors and several reflectors. Yagi-Uda antenna can be easily designed and achieve relatively high gain. For example, a properly designed three-element Yagi-Uda antenna can achieve gain of about 7~8dB. Therefore, Yagi-Uda is good for use in point-to-point wireless communication. In this thesis, we proposed a new structure that is a stacking Yagi-Uda antenna in LTCC substrate and operating in V-band. Five different types of Yagi-Uda an

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16

Chiang, Hsin-Wu, and 姜欣吾. "Microstrip Patch Array and Yagi-Uda Antenna at 2.6GHz for WiMax Application." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/01016446635550297454.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>102<br>In this thesis, two types of array antennas fabricated on a FR4 substrate are investigated.The main objective of this study is to discuss and implement PTP (Point-to-Point) array antennas applied to fixed outdoor CPE (Customer Premises Equipment) of WiMAX Wireless Communication System. The first microstrip antenna was designed at 2.6 GHz The main studies include simulation and discussion of different kinds of planar array antennas, design, simulation and practical measurement of 1 x 4, 1 x 6 planar microstrip array antennas. The measurement results are shown

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17

Jiang, You-Hua, and 姜佑樺. "The Design of Wireless Power Transmission with Yagi-Uda Antenna for 2.4GHz Band." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/ghqppt.

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碩士<br>義守大學<br>電機工程學系<br>104<br>In this thesis, in the 2.4 GHz band of Wireless power transmission system, the case in recent years was due to rising mobile phone usage and universality, WLAN Wi-Fi Internet are becoming more common, the relative power consumption of the phone is very fast but do not want action to bring the case plus power supply, in view of the proposed concept to WLAN Wi-Fi as charging energy. The wireless power transmission system research can be divided into two parts, the first part of the antenna receiving portion, the second part is the rectified voltage output section,

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18

Kuo, Che-Lun, and 郭哲倫. "Analysis of Yagi-Uda Type Nanoantennas Using the Parallelized Finite-Difference Time-Domain Method." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/kn2zbu.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>105<br>The finite-difference time-domain method (FDTD) has been widely used in computational electromagnetics. We developed a parallelized three-dimensional (3-D) FDTD simulator in C++ language. The message passing interface (MPI) protocol is applied to our simulator for parallelizing several computers in the computation in order to speed up the process and shorten the simulation time. In this research, the main topic is to analyze the far-field properties of metallic and all-dielectric nano-antennas, and we focus on Yagi-Uda type structures. Due to low loss, the al

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19

Ramos, Amélia da Silva. "Multilayer radiating structures for mmWaves." Master's thesis, 2018. http://hdl.handle.net/10773/25997.

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In this dissertation three Yagi-Uda antennas were built, one with a frequency of operation of 2.4 GHz and the others operating at 24 GHz. Yagi-Uda antennas are well known, but here, printed Yagi-like prototypes were developed since nowadays most systems require printed circuits. Moreover, a comparison on the performance of a planar and a multilayer Yagi antenna was made, both operating in the mmWave region. Throughout the work it was possible to progressively improve gain and bandwidth, starting in the 2.4 GHz antenna and culminating in the multilayer prototype. These results were achieved w

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20

Jia-HongChen and 陳嘉宏. "Generation of convergent light spot by surface plasmon manipulated Smith-Purcell radiation on Yagi-Uda nanoantenna arrays." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/hn9grj.

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21

See, Kel Meng, and 徐凱明. "i. Plasmonic Doppler Grating for Azimuthal-Angle-resolved Color Sorting and Index Sensing ii. Photoluminescence Driven Gold Optical Yagi-Uda Nanoantenna as Directional Broadband Photon Source." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/56037672760038997703.

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碩士<br>國立清華大學<br>化學系<br>104<br>Inspired by radio-frequency antenna technology, engineering of plasmonic nanoantenna has gain considerable interests in recent years since it provides the opportunities to manipulate the interaction of high-frequency electromagnetic (EM) wave and matter at nanoscale. In this thesis, we present two topic regarding to the control of light and matter interaction using plasmonic nanoantennas. In the first topic, we present a new design of two dimensional grating with continuous azimuthal angle-dependent periodicity for broadband surface plasmon wave excitation. The Pl

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22

Almeida, Tiago Daniel Sanches de. "Projecto de uma antena para comunicação Wireless do ROVIM." Master's thesis, 2013. http://hdl.handle.net/10400.26/19506.

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A evolução tecnológica leva ao aparecimento de novos meios e novas realidades, revolucionando por completo o mundo. O Exército Português também acompanha esta evolução e adquiriu recentemente vários robôs para serem utilizados na vigilância do teatro de operações. Esta dissertação tem como objectivo dimensionar e construir um protótipo de uma antena que visa fazer a comunicação ,sem fios (wireless) entre o operador e o robô usado na vigilância. Este protótipo tem de permitir ao operador alternar entre várias larguras do lobo principal (-3 dB) e ao mesmo tempo vários ganhos. Nesta dissertação

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23

Ruano, Edgar Manuel Branco. "Estudo comparativo de duas antenas para transmissão sem fios em 2,4 GHz." Master's thesis, 2016. http://hdl.handle.net/10400.26/17819.

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A necessidade de antenas para comunicação com sistemas não tripulados, utilizados pelas Forças Armadas, para realizar tarefas de vigilância e reconhecimento levou ao desenvolvimento deste trabalho. A presente dissertação tem como objetivo dimensionar e construir um protótipo de uma antena, que possibilita realizar a comunicação, sem fios entre o operador e os sistemas não tripulados. Este trabalho teve como foco a otimização e realização prática de uma antena ESPAR (Eletronically Steerable Passive Arrays Radiators), utilizando a técnica dos algoritmos genéticos. Esta antena permite um diagra

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