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Дисертації з теми "RECONFIGURABLE PATCH ANTENNA"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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1

Yee, Steven C. (Steven Christopher) 1989. "A frequency reconfigurable circularly polarized microstrip patch antenna using liquid metal microswitches." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82359.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 78-80).<br>Reconfigurable antennas with adaptable frequency, pattern, and polarization offer flexibility and size reduction for wireless systems that must increasingly execute multiple missions with less volume. These antennas will also complement anticipated cognitive radio systems, which promise more efficient use of the electromagnetic spectrum. Microscale liquid metal switches are proposed to ov

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2

Jung, Chang won, Ming-jer Lee, Sunan Liu, G. P. Li, and Flaviis Franco De. "RECONFIGURABLE PATCH ANTENNA FOR FREQUENCY DIVERSITY WITH HIGH FREQUENCY RATIO (1.6:1)." International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/605028.

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ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada<br>Reconfigurable patch antenna integrated with RF mircoelectromechanical system (MEMS) switches is presented in this paper. The proposed antenna radiates circularly polarized wave at selectable dual frequencies (4.7 GHz and 7.5GHz) of high frequency ratio (1.6:1). The switches are incorporated into the diagonally-fed square patch for controlling the operation frequency, and a rectangular stub at

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3

Pan, Kuan-Chang. "Ferroelectric Barium Strontium Titanate Thin-Film Varactor Based Reconfigurable Antenna." University of Dayton / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1323453777.

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4

Balcells, Ventura Jordi. "Radiation pattern reconfigurable microfabricated planar millimeter-wave antennas." Doctoral thesis, Universitat Politècnica de Catalunya, 2011. http://hdl.handle.net/10803/32032.

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Els serveis de telecomunicacions i sistemes radar estan migrant a freqüències mil•limètriques (MMW), on es disposa d 'una major amplada de banda i conseqüentment d'una major velocitat de transmissió de dades. Aquesta migració requereix de l'ús de diferents tecnologies amb capacitat d'operar a la banda de freqüències mil•limètriques (30 a 300 Ghz), i més concretament en les bandes Ka (26,5 - 40GHz), V (50 – 75GHz) i W (75 – 110GHz). En moltes aplicacions i sobretot en aquelles on l'antena forma part d'un dispositiu mòbil, es cerca poder utilitzar antenes planes, caracteritzades per tenir unes

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5

Towfiq, MD Asaduzzaman. "Application Aware Reconfigurable Antennas and Arrays for 5G and Beyond Wireless Communication Systems." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7250.

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Antennas enable wireless communication by transmission and reception of electromagnetic (EM) signals, which carry information is space. Signal reception and hence the quality of service depends significantly on the antenna properties, e.g. radiation pattern, operational frequency, and polarization. Legacy antennas, with their fixed properties, fail to adapt to the changing environment and degrade signal quality. Reconfigurable antennas (Ras) capable of changing their properties dynamically increase the capacity and data rate of wireless systems while offering a compact design. However, these a

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6

Zlatníček, Radek. "Rekonfigurovatelná flíčková anténa." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219099.

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The master's thesis deals with the design and implementation of a reconfigurable patch antenna. The antenna is fed by a microstrip transmission line. To the microstrip feeder, tuning stubs are connected. Each stub matches the input impedance of the antenna to 50 ? for different operation frequencies. Stubs can be individually connected to the feeder by PIN diodes; operation frequency of the antenna can be switched that way. In the project, the antenna is initially designed for antenna substrate RO3006. Then, the design will be converted to the substrate ARLON AD600 selected for the realization

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7

Elfergani, 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.

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8

Obeidat, Khaled Ahmad. "Design Methodology for Wideband Electrically Small Antennas (ESA) Based on the Theory of Characteristic Modes (CM)." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274730653.

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9

SHARMA, KHUSHBU. "A RECONFIGURABLE PATCH ANTENNA WITH EBG STRUCTURE." Thesis, 2018. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16535.

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Microstrip antennas are widely used in wireless communications because of their compatibility, low profile, low power consumption and low cost. The capability to select the frequency is essential for diverse missions and this is achieved by a Reconfigurable Antenna. Resonant frequency of an antenna is changed by reconfiguring its geometrical structure. To achieve reconfigurability RF switching devices such as PIN diodes , photoconductive switches, micro-electromechanical system (MEMS) switches and FETs can be used. Electromagnetic Bandgap (EBG) Structures that are those structures in

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10

Chen, Shing-Hau, and 陳星豪. "Reconfigurable Microstrip Ring Patch Antenna." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/37865871203503266324.

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碩士<br>國立彰化師範大學<br>電機工程學系<br>95<br>The designs of a reconfigurable ring patch antenna are proposed and studied in this dissertation. The thesis is mainly divided into three topics. First, the design of a ring patch antenna with wideband and dual-frequency operations is presented. The antenna consists of a parasitic square ring patch that is shorted to the ground plane through two shorting walls and is excited by a top-loaded coaxial probe. For the proposed design, while the side length of the square ring patch is about 0.3 free-space wavelengths and the antenna height is less than 0.1 free-spac

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11

Tsai, Chia-Han, and 蔡佳翰. "Pattern Reconfigurable Yagi-Like Patch Antenna." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/c994rm.

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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>This thesis presents a reconfigurable antenna with pattern diversity for indoor WLAN IEEE 802.11ac applications. First, two kinds of antennas are proposed in this thesis. The first kind is the beam tilt antenna, which may generate tilt-beam patterns toward 4 directions in the horizontal plane. The other kind is the broadside microstrip antenna that may generate broadside patterns. In view of the compact design, both kinds of antennas are integrated into the same PCB module (80×80×2.4 〖mm〗^3). The PCB stacking consists of three layers, including the antenna pa

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12

Yi-Fan, Wu, and 吳逸凡. "Design of Novel Reconfigurable Patch Antenna for Quadri-polarization diversity." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/x48x8z.

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碩士<br>國立交通大學<br>電信工程系所<br>94<br>In this thesis, novel reconfigurable patch antennas for quadri-polarization diversity are designed and fabricated. To satisfy the requirement of polarization diversity in the integrated communication systems, we propose the idea of switching the polarization statuses of antennas by controlling the bias of pin diodes in this thesis. This way, antennas are operated between dual-linear and dual-circular polarization. The polarization statuses of antennas are decided by either different resonating structures or different feeding signals. Therefore, by controlling th

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13

Reddy, S. P. "A Reconfigurable Aperture Coupled Microstrip Patch Antenna with Beam Steering Capability on Silicon." Thesis, 2012. http://raiith.iith.ac.in/704/1/EE10M10.pdf.

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First reconfigurable antenna came into existence in early 1980s. Reconfigurable antennas provide various functions in operating frequency, polarization & radiation patterns since it can be used to avoid noise sources, improve system gain & security [1]. Reconfiguring the Frequency is the major issue & lot of recent work has been done on frequency reconfigurability A Barium Strontium Titanate (BST) based reconfigurable Aperture-coupled patch antenna on high resistivity silicon substrates with beam steering capability using PIN doides has been proposed in this paper. For low dielectric co

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14

Goldberger, Sean A. "A Study of Microfluidic Reconfiguration Mechanisms Enabled by Functionalized Dispersions of Colloidal Material for Radio Frequency Applications." Thesis, 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-535.

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Communication and reconnaissance systems are requiring increasing flexibility concerning functionality and efficiency for multiband and broadband frequency applications. Circuit-based reconfiguration mechanisms continue to promote radio frequency (RF) application flexibility; however, increasing limitations have resulted in hindering performance. Therefore, the implementation of a "wireless" reconfiguration mechanism provides the required agility and amicability for microwave circuits and antennas without local overhead. The wireless reconfiguration mechanism in this thesis integrates dynamic,

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15

Chan, Ming-Che, and 詹明哲. "Reconfigurable Patch Antennas with Omni-Directional Radiation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/83266671360237422832.

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碩士<br>國立彰化師範大學<br>電機工程學系<br>97<br>Designs of frequency and polarization reconfigurable microstrip patch antennas with conical radiation are respectively presented in this thesis. For the reconfigurable frequency antenna design, a monopolar patch antenna structure is used to generate conical radiation patterns. The frequency switching is realized by controlling four diodes to reconfigure the size of the shorted rectangular patch of the monopolar patch antenna. Each diode connects one side of the shorted rectangular patch and an open stub. For the reconfigurable polarization antenna design, the

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16

Chen, Tseng-Yuan, and 陳贈元. "Frequency-Reconfigurable Microstrip Patch Antennas Using Ferroelectric Varactors." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/78521734492517559596.

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碩士<br>國立中央大學<br>電機工程學系<br>105<br>The operating frequency of an antenna can be made reconfigurable by incorporating tuning elements. In this thesis, microstrip patch antennas are loaded with variable capacitors (varactors) to acquire frequency tunability. We design and fabricate two kinds of frequency-reconfigurable microstrip patch antennas, both of which use ferroelectric varactors with barium strontium titinate (BSTO) as the dielectric material for the capacitive loading. One of the microstrip patch antennas uses benzocyclobutene (BCB) as its dielectric whereas the other patch antenna uses h

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17

Sahu, Ashish Kumar. "Design and Analysis of Polarization Reconfigurable Microstrip Patch Antennas." Thesis, 2015. http://ethesis.nitrkl.ac.in/7551/1/2015_Design_Sahu.pdf.

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The objective of work is to design and develop Polarization Reconfigurable Micro strip patch antenna which radiate electromagnetic wave of various orthogonal patterns. A progression of parametric study was done to get that how the features of the antenna depends on dimensions and material of geometry. Simulation of antenna has to be done by using CST microwave studio and HFSS. Antennas of various geometry have to be simulated and fabricated which radiates various orthogonal patterns of electromagnetic wave. The first antenna is to design and develop dual feed reconfigurable circularly polarize

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18

Chang, Lieh-Hao, and 張烈豪. "Reconfigurable Circular Patch and Ring Slot Antennas Using Diode Switches." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/47620099585282555672.

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碩士<br>長庚大學<br>電子工程學系<br>99<br>This thesis presents two designs of reconfigurable antennas by using diode switches such that the main beam directions or polarization directions of the antennas can be changed to achieve the best receiving or transmission effects. The first one is a circular patch antenna with a ring slot on it. On the ring slot, diode switches are placed at 30° interval. By selectively turning on or off these diode switches, the polarization of the antenna can be changed such that it is possible to receive linear polarization waves in different directions. The measured 10-dB ban

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