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Dissertations / Theses on the topic 'Mobile antenna'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Sonkki, M. (Marko). "Wideband and multi-element antennas for mobile applications." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526201085.

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Abstract This dissertation presents wideband and multi-element antennas for mobile applications. It is divided into the following main parts: modal theory, wideband antennas, multi-element antennas, and wideband multi-element antennas. The radiating fields are first studied in terms of spherical scalar and vector modes, and it is shown how these modes correlate with the characteristic current modes on a planar mobile ground plane. The theory part shows how it is possible to excite the same modes on a conventional sphere and a rectangular planar mobile ground plane. The theory refers to the nov

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2

Toh, B. Y. "Heterodyne self-steering array characterization for mobile communications." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390865.

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3

Petrus, Paul. "Blind adaptive antenna arrays for mobile communications." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07112009-040414/.

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4

Saif, Khalid, and Nazem Alsmadi. "Mobile Phone Antenna Design." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1080.

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This thesis focuses on mobile phones antenna design with brief description about the historical development, basic parameters and the types of antennas which are used in mobile phones. Mobile phones antenna design section consists of two proposed PIFA antennas. The first design concerns a single band antenna with resonant frequency at GPS frequency (1.575GHz). The first model is designed with main consideration that is to have the lower possible PIFA single band dimensions with reasonable return loss (S11) and the efficiencies. Second design concerns in a wideband PIFA antenna which cover the

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5

Kang, Heewon. "Multiple antenna systems in a mobile-to-mobile environment." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-11172006-173605/.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2007.<br>Gordon L. Stuber, Committee Chair ; Guillermo Goldsztein, Committee Member ; Gregory D. Durgin, Committee Member ; John R, Barry, Committee Member ; Mary Ann Ingram, Committee Member.

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6

Moradi, Shahrbabak Shahla. "Usereffect on mobile terminal antenna." Thesis, University of Gävle, Ämnesavdelningen för elektronik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-4386.

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Brown, Timothy W. C. "Antenna diversity for mobile terminals." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/2125/.

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8

Wang, Qingyuan. "Broadband microstrip circuits, antennas, and antenna arrays for mobile satellite communications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/NQ56848.pdf.

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Qiu, Meide. "An FDTD code for mobile telecommunications antenna design." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0031/MQ47470.pdf.

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10

Yong, Su-Khiong. "Compact antenna arrays for mobile communications." Thesis, University of Edinburgh, 2003. http://hdl.handle.net/1842/11648.

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The contributions of this thesis are four fold. Firstly, the implementation of COST 259 directional channel model in terms of tapped delay line is developed. While the implemented channel model facilities link level simulation, capacity analysis indicates that the delay spread has relatively small impact as compared to the azimuth spread (AS) on the channel capacity. Secondly, an antenna model which incorporates various antenna effects into the performance study of antenna arrays (AAs0 is developed. A comprehensive study of these effects through computer simulations reveals that the use of ide

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Randell, Damian P. "Integrated antenna diplexer for mobile communications." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402528.

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The rapid growth in second generation mobile telecommunications has resulted in the design of the third generation mobile telecommunication system together with proposals for the fourth generation system. Much of this has been driven by consumer requirements for a global telecommunications system, allowing connection from anywhere around the world and offering data rates that facilitate access to a range of multimedia services. Therefore, continual research into mobile handsets, improving standards and delivering smaller, lower cost devices, is required. The work presented reviews the differen

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12

Karode, Shyam Lilachand. "Conformal retrodirective antenna array characterisation." Thesis, Queen's University Belfast, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268151.

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13

Rowell, Corbett Ray. "Mobile device antenna design & isolation technologies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50533897.

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Mobile device antenna design and isolation technologies are thoroughly investigated in this thesis. The antenna design parameters for mobile devices are quantified using practical restraints by analyzing almost 60 mobile handsets and the effect of materials, human tissue, manufacturing, and antenna type/placement on antenna design and then mapped into Wheeler-space that correlates the spherical wave modes with the antenna performance. The isolation technologies with mutual coupling anti-resonances are unified by a single performance parameter to distinguish them from the more traditional iso

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14

Ee, Lee. "Antenna design for future mobile communication terminals." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633123.

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The vision of the Personal Communication System is to provide ubiquitous communication anytime, anywhere in the world. This has led to the development of multiple standards that are currently being used throughout the world. The purpose of this thesis is to look at some of these scenarios and proposed innovative antenna design solutions to meet the needs of the current and future generation wireless communication systems. This thesis entitled "Antenna Design for Future Mobile Communication Terminals" documented the work done from 22 nd September 1997 to 1 st April 2001. To this end, three wire

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Song, Peter C. T. "Novel antenna design for future mobile systems." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633236.

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User requirements for access to a diversified range of wireless telecommunication services have resulted in a rapid technological push to unify these several different systems on a common platform. The objective of this work is to develop novel antenna design solutions not only for existing systems but also any future generation wireless communication systems. This thesis titled "Novel Antenna Design for Future Mobile Systems" describes the work done for the period from 15th January 1998 to 14th January 2001, under the studentship agreement between British Telecommunications and the University

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Hamouda, Hafedh. "Conception d'antennes miniatures intégrées à leur support pour applications en télémédecine mobile." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4062.

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La télémédecine et plus particulièrement la télémédecine mobile semble représenter l’avenir en termes de soins médicaux. Ce concept nécessite cependant pour sa viabilité, de disposer d’éléments rayonnants miniatures, fortement efficaces, et capables de communiquer sur plusieurs bandes. Ce mémoire présente la méthodologie de conception et l’optimisation d’antennes miniatures intégrées, dédiées à un dispositif spécifique permettant de réaliser une liaison radiofréquence entre un implant médical et le téléphone portable d’un patient. Cependant, la miniaturisation des antennes, éléments clés de ce

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17

Beyene, Dereje, and Befkadu Degefa. "Adaptive Antenna Arrays for Satellite Mobile Communication Systems." Thesis, Linnaeus University, School of Computer Science, Physics and Mathematics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-191.

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<p>Adaptive antenna arrays have a great importance in reduction of the effect of interference and increase the capacity for the mobile satellite communication. Interference and multipath fading remain a main problem for reception of signals. These two problems obviously affect the overall capacity. Adaptive antenna arrays in the handheld mobile apparatus will be the solution for the above two problems.</p><p> </p><p>Satellite mobile communication is one of the growing fields in the communication area where terrestrial infrastructures are unable or ineffective to supply. Maritime, aeronautical

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Bratu, Vlad-Ioan. "Self-optimization of Antenna Tilt in Mobile Networks." Thesis, KTH, Kommunikationssystem, CoS, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101981.

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The increased complexity of mobile networks, the need to deliver high data rate services and the variation of mobile traffic put a high burden on operation and maintenance in terms of extra workload and additional costs . New approaches to network optimization and management should be taken into account to increase network performance and reduce operational costs. Antenna tilt is a powerful parameter for optimization of a mobile network. It has direct impact on shaping the boundary of the serving cell and hence on the coverage and interference parameters of the network. With the introduction o

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Zhou, Wei. "Autonomous smart antenna systems for future mobile devices." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/9959.

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Along with the current trend of wireless technology innovation, wideband, compact size, low-profile, lightweight and multiple functional antenna and array designs are becoming more attractive in many applications. Conventional wireless systems utilise omni-directional or sectored antenna systems. The disadvantage of such antenna systems is that the electromagnetic energy, required by a particular user located in a certain direction, is radiated unnecessarily in every direction within the entire cell, hence causing interference to other users in the system. In order to limit this source of inte

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Akhtman, Jos. "Smart antenna-aided multicarrier transceivers for mobile communications." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/264048/.

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21

McKay, Kevin Roy Carleton University Dissertation Engineering Electronics. "A stacked microstrip antenna for mobile satellite communication." Ottawa, 1993.

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22

Leather, Paul Simon Holt. "Antenna diversity for hand-portable radio at 450MHz." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286174.

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23

Berg, M. (Markus). "Methods for antenna frequency control and user effect compensation in mobile terminals." Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514296918.

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Abstract In this thesis, new methods for mobile terminal antenna frequency control and user effect compensation are presented. The thesis is divided into two parts. The first part includes frequency reconfigurable and tuneable antennas for mobile terminals. At first, the efficient frequency reconfiguration methods for a slot-, planar inverted-F (PIFA) and inverted-F (IFA) antennas are presented. Methods are based either on the use of RF switches, or on variable capacitor loading. One of the frequency tuneable antennas is used for the antenna frequency bandwidth enhancement in an internal digit

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Li, Houmin Thomas Gwynedd A. "Geotextile antenna design for mobile phone cooperative communication relay node." Auburn, Ala., 2008. http://hdl.handle.net/10415/1498.

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Harju, J. M. (Juha-Matti). "Mobile antenna solution for three band downlink carrier aggregation." Master's thesis, University of Oulu, 2014. http://urn.fi/URN:NBN:fi:oulu-201403121166.

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This thesis is a comparison of different mobile antenna solutions suitable for three band downlink carrier aggregation in long term evolution (LTE) systems. The most important comparable performance metric is the total efficiency including the required RF front end configuration. Also, the total volume occupied by the antenna elements and the transmission lines from the front end to the antennas is compared. Additionally, designed antennas should meet the set performance requirements antennas through specified frequencies for total efficiency, matching and envelope correlation coefficient of m

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Ng, Kok Keng. "Smart antenna application in DS-CDMA mobile communication system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FNg.pdf.

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Wang, Ru-San, and 王如森. "Mobile Smart Antenna." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/48320087242482300009.

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碩士<br>元智大學<br>通訊工程學系<br>95<br>The purpose of this essay is to develop a low-cost intelligent antenna which can be installed on mobile vehicle and receive digital TV programs. Using an singl-chip 8052 as a host controller to make a step-motor to rotate 360-degree, a one-directional antenna is located on a turntable which is driven to rotate by the step-motor.First,the antenna scans an energy of every angle and transforms the energy which is analog data into digital data, and then sends the data to the host controller to arbitrate.After the host controller determines the widest azimuth. the ante

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Lai, Jeng-wen, and 賴正文. "Mobile TV Antenna Designs." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10850172790712650294.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>92<br>The research of this thesis is on the mobile TV antenna designs. There are three antenna designs proposed in this thesis. The first two designs are for portable TV sets. They are different from the traditional straight monopole antenna because the two proposed designs can be built-in with the portable TV set. The third one is for laptop applications. It can be stored inside a laptop when the antenna is not in use, and can be pulled out of the laptop when in operation. Thus the proposed antenna will not affect the appearance of the laptop.

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Chen, Chun-Heng, and 陳俊亨. "Antenna designs for mobile handset applications." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/71757628474266526782.

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碩士<br>正修科技大學<br>電子工程研究所<br>96<br>According to develop the trends of the mobile system, the antenna designs for broadband operation have been proposed. The principal constructions are the printed plane antennas, the advantages are made easy, low cost, low-profile. Utilizing the multiple current paths or dual current paths in these antennas by 50Ω of the coaxial feed to reach the multi-band. In addition, this notch can alter the electromagnetic coupling effects between the monopole and the ground plane, and improves impedance bandwidth to make the frequency ratio around 2.04:1. To reach GSM/PCS/

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Fang, Chi-Yin, and 方啟印. "Novel Antenna Designs for Mobile Handsets." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/12937208928128508814.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>91<br>Two novel antenna designs for mobile handsets are proposed in this thesis. With a helix loading, an inverted-L monopole antenna capable of generating two resonances at about 900 and 1850 MHz is first presented. The operating bandwidths obtained cover the required bandwidths of the GSM/DCS/PCS bands. Besides, an internal mobile handset antenna comprising a PIFA and a PILA, which are, respectively, designed for covering the GSM and DCS/PCS bands is also presented. The PIFA and PILA together occupy a compact volume of 7.2 × 20 × 40 mm3, and are suitable to be bu

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Wu, Jian-Rong, and 吳建榮. "Isolated Antenna Designs for Mobile Devices." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/20853690644596173746.

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碩士<br>正修科技大學<br>電子工程研究所<br>99<br>This study presents the isolated antennas for mobile devices. The designs can reduce surface current on system ground plane, and be applied to wireless communication system of WiMAX 3.5 GHz and GSM900/1800 MHz. The first design presents an integrated λ/2 dipole antenna. The design consists of two inverted L-strip structures, printed on both sides of an FR4 substrate. Two closed modes are excited and combined together to achieve a broadband operation. The second design presents a folded wire antenna for dual-band operation. The antenna consists of two λ/2 open-l

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Chiu, Ching-Yuan, and 邱清源. "Half-Wavelength Loop Antenna for Mobile Phones." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10475398725544264364.

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碩士<br>國立中山大學<br>通訊工程研究所<br>92<br>In this thesis we introduce a half-wavelength loop antenna for operation as an internal antenna for mobile phones. First, we introduce a single loop antenna for single-band operation (eg., UMTS band), and experimental and simulated results are presented. Next, we introduce a dual-band loop structure which covers the operating bandwidths of the GSM/DCS dual-band mobile phone. The proposed dual-loop antenna is studied, especially for the effects between the two loops of the antenna. Both of the single-loop and dual-loop antennas have the characteristics of genera

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Kao, Kuo-Wei, and 高國偉. "Quad-Band Antenna Design for Mobile Communication." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/ra6a2e.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>99<br>This paper is to design a Quad-band Planar Inverted-F Antenna (PIFA) for 2G and 3G mobile communication which include bands GSM900/DCS /PCS/UMTS2100. the antenna is composed of copper and PCB. The copper is cut and bent and further mounted on the PCB. And the signal is fed by 50ohm micro-strip line on the PCB. When designing this antenna, HFSS is used to simulate all related parameters about the antenna and the results would be studied and further used to design the requested Quad-band antenna. Finally, compare the antenna characteristics like return loss, radi

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Wu, Ming-shan, and 吳明珊. "Smart Antenna Array for Mobile Internet Application." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/p94h4p.

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碩士<br>國立中央大學<br>電機工程學系<br>102<br>The target of this study is to develop a smart antenna array for mobile communication application, so as to improve the transmission efficiency and interference suppression. The center frequency of 2.4 GHz is chosen, which is one of the ISM band (Industrial Scientific Medical Band) and is commonly used for WLAN (IEEE 802.11b / IEEE 802.11g), Bluetooth, and ZigBee applications. Most of the conventional antenna designs for mobile application are omnidirectional ones because the signal may come from any direction. However, this does not lead to optimal data tran

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Liou, Li-Min, and 劉力銘. "Novel Internal Antenna Design for Mobile Application." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/59761269596745869149.

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碩士<br>南台科技大學<br>通訊工程研究所<br>98<br>In this thesis, we present printed antennas with multi-band operation for communication devices. We propose a novel planar monopole antenna which has a simpler structure and operate frequency modes at 900 MHz, 1.8 GHz and 2.4 GHz, by using the C-strip on the proposed antenna, good impedance matching and four bands of the proposed antenna can be achieved. The proposed monopole antenna was designed to cover the global system for mobile communication (890–960 MHz), digital communication system (1710–1880 MHz), personal communication system (1850–1990 MHz), and uni

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Yeh, Li-Yu, and 葉秝妤. "Design of Monopole Antenna for Mobile Communications." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/41537682962713408448.

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碩士<br>南台科技大學<br>通訊工程研究所<br>99<br>Recently, the mobile phone has become a requirement of life. The mobile phone is not already only a communication tool, but also it combines lots of other applications. As the demands for covering bands are increasing, however, designing of antenna is intending toward to small size and compact with multi-band operation. Instead of the traditional exposed antenna, the internal antenna is the current trend since it can place at inner of a handset. For miniaturization of current handsets, internal antenna is easier than exposed antenna. In this thesis, we present

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Jeng, Kai-Hong, and 鄭凱鴻. "Equivalent Circuit Perspective on Mobile Antenna Design." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/33274397452316517923.

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碩士<br>亞東技術學院<br>資訊與通訊工程研究所<br>103<br>Utilzation of the equivalent circuit model has shown more time-effective for designing RF circuits and antennas rather than Electromagnetic fields analysis. This study investigates equivalent circuit perspective on designing the resonant antenna. An equivalent π-network circuit is firstly proposed and de-embedded by using even-odd mode analysis to approach the electromagnetic fields coupling of a closely coupled two-element diversity antenna. Thus, the improvement on the isolation between antennae can be straightforward achieved by employing resonant and ab

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Lin, Cheng-Hung, and 林政宏. "Practical Antenna Design for Mobile Terminal Applications." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/22743103789175425610.

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博士<br>國立臺灣海洋大學<br>電機工程學系<br>105<br>Mobile communication devices have become an important commodity of everyday life. The product trend is toward multi-functional applications and the communication system is developed to operate in multi-bands. Hence, the demands for broadband and multi-bands antenna design are ever increasing. Furthermore, increasing the data rate and channel capacity in modern wireless communication systems is also crucial for the product development. The technologies of diversity and MIMO antennas are applied to accommodate multiple data streams. Designing multiple antennas

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Fang, Chi-Rung, and 方麒榮. "Mobile Devices Antenna for LTE MIMO Operations." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/21778202747368208586.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>102<br>This thesis mainly discusses the design of LTE multi-band antennas for the applications of the LTE communication systems. The proposed antenna is also suitable for being embedded in smart mobile devices. A monopole antenna resonates at a frequency of 1.8 GHz was designed as the reference antenna. Then, two resonant frequencice of 700 and 900 MHz were obtained by coupling two shorting strips to the reference antenna. Finally, good impedance matching can be obtained by adjusting the strip width. The proposed multi-band antenna achieved good impedance matching

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Dong, Liang. "Adaptive antenna systems for mobile broadband communications." Thesis, 2002. http://wwwlib.umi.com/cr/utexas/fullcit?p3101201.

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Wang, Chih-Chung, and 王致中. "LTE MIMO Antenna For Mobile Hsndset Application." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/60505814338320641262.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>104<br>This paper presents a triple band multiple-input multiple-output (MIMO) monopole antenna used in Long Term Evolution (LTE) operating at 900/1800/2600MHz bands. Two antennas system will be placed in a limited space and in order to avoid the effects of coupling between the antennas, a high isolation must be maintained. Microstrip antennas fabricated on a 1.6 mm thick FR4 substrate with a total area of 130×70mm2 was being considered. A meander line decoupling structure is implemented to achieve a good isolation between the transmitting and receiving antennas. T

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Lin, Wun-Jian, and 林文堅. "Ground Antenna for Slim Mobile Communication Devices." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/95453588559010637307.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>100<br>In this thesis, two types of handset antenna design respectively for dual-band GSM850/1900 operation and seven–band LTE/WWAN operation are presented. The proposed antennas can achieve decreased antenna size and enhanced operating bandwidth by shaping the system ground plane of the handset. The seven-band LTE/WWAN antenna is printed on the system circuit board with good radiation characteristics and occupies a small size of 24.5 x 10 mm2. At first, we propose a half-loop antenna structure which integrates its facing edge of the system ground plane as the reso

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Chen, Xin-Yu, and 陳昕宇. "Study of Fourth-Generation Mobile Phone Antenna." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/28102515159208295865.

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碩士<br>明志科技大學<br>電機工程研究所<br>101<br>The three antennas which are applied to different applications are proposed in this paper. The first antenna is a coupling monopole antenna with a size of 60(W)*100(L)*0.8(H) mm^3, which is printed on a inexpensive FR4 substrate with 0.8mm-thick. This antenna is suited to eight-band operation involving LTE(700/2300/2500 MHz), GSM(850/900/1800/1900 MHz), GPS(1575-1585 MHz), DCS(1710-1880 MHz), PCS(1850-1990 MHz), UMTS(1920-2170 MHz), WLAN(2400-2484 MHz), WiMAX(2300-2600 MHz). The return loss of the antenna is totally below -6dB and its operation bands are achie

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廖章凱. "Multi-band Antenna for Mobile Device Applications." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/31809641149347147135.

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Wang, Shuai, and 王帥. "Antenna Design for 4G Mobile Phone Application." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/83359691889632257041.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>99<br>We have proposed two types of built-in internal antennas implemented in 4G mobile handset for application in LTE、GSM、DCS、PCS and UMTS frequency bands. Both designs were printed on FR4 substrates and have the character of simple structure. The first design consisted of a planar monopole antenna. Three resonance bandwidths below - 6 dB measurement for the entire bandwidth ranging from 746~960 MHz and 1710~2170 MHz can be achieved with the design. The covering frequency bands conform to the specification of 4G mobile phone system application. The return loss, rad

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SHIH, YUNG-SHENG, and 施詠升. "Multi-band Antenna Design for Mobile Communications." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/asdt26.

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碩士<br>修平科技大學<br>電機工程碩士班<br>106<br>The thesis first proposes a coplanar antenna design. The purpose is to reduce the antenna and increase the gain, and apply it to 4G/3G/2G wireless mobile communication systems. So the antenna operating frequency band in this thesis is from the traditional 2G GSM (with quad-band 824~960 MHz/1710~1990 MHz) and 3G UMTS (Universal Mobile Telecommunication System, 1920 ~ 2170 MHz). In addition, the current fourth-generation mobile communication system mainly has three frequency 700/800, 1700/1900 and 2600MHz. Its design uses a quarter-wave monopole antenna calculat

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Ojaroudi, Parchin Naser, Yasir Al-Yasir, Ahmed M. Abdulkhaleq, et al. "Frequency Reconfigurable Antenna Array for MM-Wave 5G Mobile Handsets." 2018. http://hdl.handle.net/10454/16680.

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Yes<br>This study proposes a compact design of frequency-reconfigurable antenna array for fifth generation (5G) cellular networks. Eight compact discrete- fed slot antennas are placed on the top portion of a mobile phone printedcircuit- board (PCB) to form a beam-steerable array. The frequency response of the antenna can be reconfigured to operate at either 28 GHz or 38 GHz, two of the candidate frequency bands for millimeter-wave (MM-Wave) 5G communications. The reconfigurability function of the proposed design can be achieved by implementing and biasing a pair of diodes across each T-

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Zhu, Shaozhen (Sharon), Tahereh S. Ghazaany, Steven M. R. Jones, et al. "Path loss evaluation for mobile-to-mobile wireless channel." 2014. http://hdl.handle.net/10454/10835.

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No<br>Narrowband path loss measurements are reported for the vehicle-to-vehicle channel between a transmitting antenna 50 cm above the ground and a car-roof-mounted receiver array. Calibration procedures and measurement results are reported for typical urban, suburban and rural-motorway environments and compared with existing mobile channel models to give insight into the large-scale fading behavior in the vehicle-to-vehicle channel.

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Shih, Yung-Kung, and 施永恭. "Design of Mobile Radio Transceiver Antenna by Utilizing Low-cost Digital TV Antenna." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/qrv74a.

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碩士<br>淡江大學<br>電機工程學系碩士在職專班<br>95<br>As a member of the laws enforcement personnel, one needs to progressively and actively exploit communication apparatus to collect evidence to accomplish his mission during his investigation of criminal activities. In the process of evidence searching and collecting it sometimes needs to use surveillance vehicle to track and monitor the suspect so as to effectively track the suspect’s activity to accomplish his task. In order to hide and not to expose the laws enforcement personnel’s identity when he is in the pursuing and monitoring the suspect, he needs to

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Dai, Bang-Yun, and 戴邦雲. "Design of Diversity Antennas on Mobile Terminals and Development of Antenna Diversity Measurement System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/55858101431222806421.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>103<br>This thesis is focused on the development of an antenna measurement system and a broadband antenna applicable for LTE uses. The first part is about a low-cost, semi-automatic effective diversity gain measurement system for multi-antenna systems. It comprises a transmitter and a receiving end. Continuous waves are provided by a signal generator and emitted from a reference antenna. The receiving end contains a control computer, a multi-channel data acquisition card, RF power detectors, and the multi-antenna system under test. The system can automatically read a

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