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1
Chu, Chun Yiu 1974. "Printed dipole antenna design for wireless communications." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83858.
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With their planar structure and compatibility with the printed circuit fabrication techniques, printed dipole antennas present one of the best options for future wireless networks. Although they have existed for a long time, printed dipole antennas are not vastly in use due to their relatively large size. In this thesis, new design techniques are proposed to miniaturize these antennas. Other major improvements such as pattern correction and bandwidth enhancement are also presented. The resulting antenna is then integrated with an IEEE 802.15.4 wireless transceiver on the same printed circuit board to show its functionality in future wireless networks.
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Moossavi, Reza. "Printed Antennas on Paper." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-19638.
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Ink-jet printing (IJP) using conductive inks, has gained the attention of scientistsand researchers during the past decades. Solar Cells (SCs), Radio FrequencyIdentication (RFID), E-papers and antennas are only some of the applicationsfor which IJP is being applied. IJP facilitates printing complex antenna structureswith a good resolution. The use of the IJP process is compatible with devicefabrication on unusual substrates such as paper, polymer lms (Polyethylenenaphthalate (PEN), Polyethylene terephthalate (PET), Polyimide (PI)), textiles,etc at low temperature. The aim of this study is to design and fabricate antennason paper substrates capable of operating at 2.4 GHz via printing technique.Simulation and experimental studies have been presented for microstrip patchantenna and dipole antenna using Itoh's balun.
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Riauka, Nerijus. "Compact and broadband antenna system at UHF." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6319.
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The aim of this research was to study a novel, broadband, low cost, low profile and a high-medium gain antenna in the UHF band. This has been achieved through numerical modelling, theoretical investigation and physical measurements. In this study two commercially available antenna systems are investigated in order to compare and establish potential deficiencies in the UHF antenna systems. A number of disadvantages are resolved within a novel antenna system design. The parametric study is performed for each element of the novel antenna system in order to optimise its overall performance. The indoor and outdoor measurements have been carried out in house, in order to validate the predicted results. The novel antenna system is compared to the most popular and commercially available UHF antenna systems. The study demonstrates that the novel antenna system has clear advantages such as broadband, balanced, compact and low cost when compared to the commercial antenna designs studied here. The comparison of the manufacturers' data to the measured results shows a good match, validating the outdoor measurements technique used in this research.
4
Bouknia, M. L., C. Zebiri, D. Sayad, I. Elfergani, M. Alibakhshikenari, J. Rodriguez, Raed A. Abd-Alhameed, F. Falcone, and E. Limiti. "Analysis of the combinatory effect of uniaxial electrical and magnetic anisotropy on the input impedance and mutual coupling of a printed dipole antenna." IEEE, 2005. http://hdl.handle.net/10454/18506.
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YesThe main objective of this work is to investigate the combinatory effects of both uniaxial magnetic and electrical anisotropies on the input impedance, resonant length and the mutual coupling between two dipoles printed on an anisotropic grounded substrate. Three different configurations: broadside, collinear and echelon are considered for the coupling investigation. The study is based on the numerical solution of the integral equation using the method of moments through the mathematical derivation of the appropriate Green’s functions in the spectral domain. In order to validate the computing method and evaluated Matlab® calculation code, numerical results are compared with available literature treating particular cases of uniaxial electrical anisotropy; good agreements are observed. New results of dipole structures printed on uniaxial magnetic anisotropic substrates are presented and discussed, with the investigation of the combined electrical and magnetic anisotropies effect on the input impedance and mutual coupling for different geometrical configurations. The combined uniaxial (electric and magnetic) anisotropies provide additional degrees of freedom for the input impedance control and coupling reduction.
This work is part of the POSITION-II project funded by the ECSEL joint Undertaking under grant number Ecsel-7831132-Postitio-II-2017-IA,www. position-2.eu and partly funded by FCT/MCTES through national funds and when applicable co-funded EU funds under the project UIDB/50008/2020- UIDP/50008/2020. This work was also supported in part by the DGRSDT (General Directorate of Scientific Research and Technological Development) - MESRS (Ministry of Higher Education and Scientific Research), Algeria, and RTI2018-095499-B-C31, Funded by Ministerio de Ciencia, Innovación y Universidades, Gobierno de España (MCIU/AEI/FEDER,UE).
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Bouknia, M. L., C. Zebiri, D. Sayad, Issa T. Elfergani, M. Alibakhshikenari, J. Rodriguez, Raed A. Abd-Alhameed, F. Falcone, and E. Limiti. "Analysis of the combinatory effect of uniaxial electrical and magnetic anisotropy on the input impedance and mutual coupling of a printed dipole antenna." IEEE, 2021. http://hdl.handle.net/10454/18506.
Full textAbstract:
YesThe main objective of this work is to investigate the combinatory effects of both uniaxial magnetic and electrical anisotropies on the input impedance, resonant length and the mutual coupling between two dipoles printed on an anisotropic grounded substrate. Three different configurations: broadside, collinear and echelon are considered for the coupling investigation. The study is based on the numerical solution of the integral equation using the method of moments through the mathematical derivation of the appropriate Green’s functions in the spectral domain. In order to validate the computing method and evaluated Matlab® calculation code, numerical results are compared with available literature treating particular cases of uniaxial electrical anisotropy; good agreements are observed. New results of dipole structures printed on uniaxial magnetic anisotropic substrates are presented and discussed, with the investigation of the combined electrical and magnetic anisotropies effect on the input impedance and mutual coupling for different geometrical configurations. The combined uniaxial (electric and magnetic) anisotropies provide additional degrees of freedom for the input impedance control and coupling reduction.
This work is part of the POSITION-II project funded by the ECSEL joint Undertaking under grant number Ecsel-7831132-Postitio-II-2017-IA,www. position-2.eu and partly funded by FCT/MCTES through national funds and when applicable co-funded EU funds under the project UIDB/50008/2020- UIDP/50008/2020. This work was also supported in part by the DGRSDT (General Directorate of Scientific Research and Technological Development) - MESRS (Ministry of Higher Education and Scientific Research), Algeria, and RTI2018-095499-B-C31, Funded by Ministerio de Ciencia, Innovación y Universidades, Gobierno de España (MCIU/AEI/FEDER,UE).
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McGough, Erin Patrick. "A Low-Cost Omnidirectional Antenna for Wi-Fi Access Points." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398172020.
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Katragadda, Mahesh. "Design and Simulation of a Planar Crossed-Dipole Global Navigation Satellite System (GNSS) Antenna in the L1 Frequency Band." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1345227397.
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Cheng, Shi. "Integrated Antenna Solutions for Wireless Sensor and Millimeter-Wave Systems." Doctoral thesis, Uppsala universitet, Mikrovågs- och terahertzteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-111197.
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This thesis presents various integrated antenna solutions for different types of systems and applications, e.g. wireless sensors, broadband handsets, advanced base stations, MEMS-based reconfigurable front-ends, automotive anti-collision radars, and large area electronics. For wireless sensor applications, a T-matched dipole is proposed and integrated in an electrically small body-worn sensor node. Measurement techniques are developed to characterize the port impedance and radiation properties. Possibilities and limitations of the planar inverted cone antenna (PICA) for small handsets are studied experimentally. Printed slot-type and folded PICAs are demonstrated for UWB handheld terminals. Both monolithic and hybrid integration are applied for electrically steerable array antennas. Compact phase shifters within a traveling wave array antenna architecture, on single layer substrate, is investigated for the first time. Radio frequency MEMS switches are utilized to improve the performance of reconfigurable antennas at higher frequencies. Using monolithic integration, a 20 GHz switched beam antenna based on MEMS switches is implemented and evaluated. Compared to similar work published previously, complete experimental results are here for the first time reported. Moreover, a hybrid approach is used for a 24 GHz switched beam traveling wave array antenna. A MEMS router is fabricated on silicon substrate for switching two array antennas on a LTCC chip. A concept of nano-wire based substrate integrated waveguides (SIW) is proposed for millimeter-wave applications. Antenna prototypes based on this concept are successfully demonstrated for automotive radar applications. W-band body-worn nonlinear harmonic radar reflectors are proposed as a means to improve automotive radar functionality. Passive, semi-passive and active nonlinear reflectors consisting of array antennas and nonlinear circuitry on flex foils are investigated. A new stretchable RF electronics concept for large area electronics is demonstrated. It incorporates liquid metal into microstructured elastic channels. The prototypes exhibit high stretchability, foldability, and twistability, with maintained electrical properties.wisenet
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Hawatmeh, Derar Fayez. "Three Dimensional Direct Print Additively Manufactured High-Q Microwave Filters and Embedded Antennas." Scholar Commons, 2018. http://scholarcommons.usf.edu/etd/7165.
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The need for miniaturized, and high performance microwave devices has focused significant attention onto new fabrication technologies that can simultaneously achieve high performance and low manufacturing complexity. Additive manufacturing (AM) has proven its capability in fabricating high performance, compact and light weight microwave circuits and antennas, as well as the ability to achieve designs that are complicated to fabricate using other manufacturing approaches. Direct print additive manufacturing (DPAM) is an emerging AM process that combines the fused deposition modeling (FDM) of thermoplastics with micro-dispensing of conductive and insulating pastes. DPAM has the potential to jointly combine high performance and low manufacturing complexity, along with the possibility of real-time tuning.
This dissertation aims to leverage the powerful capabilities of DPAM to come-up with new designs and solutions that meet the requirements of rapidly evolving wireless systems and applications. Furthermore, the work in this dissertation provides new techniques and approaches to alleviate the drawbacks and limitations of DPAM fabrication technology. Firstly, the development of 3D packaged antenna, and antenna array are presented along with an analysis of the inherent roughness of 3D printed structures to provide a deeper understanding of the antenna RF performance. The single element presents a new volumetric approach to realizing a 3D half-wave dipole in a packaged format, where it provides the ability to keep a signal distribution network in close proximity to the ground plane, facilitating the implementation of ground connections (e.g. for an active device), mitigating potential surface wave losses, as well as achieving a modest (10.6%) length reduction. In addition, a new approach of implementing conformal antennas using DPAM is presented by printing thin and flexible substrate that can be adhered to 3D structures to facilitate the fabrication and reduce the surface roughness. The array design leverages direct digital manufacturing (DDM) technology to realize a shaped substrate structure that is used to control the array beamwidth. The non-planar substrate allows the element spacing to be changed without affecting the length of the feed network or the distance to the underlying ground plane.
The second part describes the first high-Q capacitively-loaded cavity resonator and filter that is compatible with direct print additive manufacturing. The presented design is a compromise between quality factor, cost and manufacturing complexity and to the best of our knowledge is the highest Q-factor resonator demonstrated to date using DPAM compatible materials and processes. The final version of the single resonator achieves a measured unloaded quality factor of 200-325 over the frequency range from 2.0 to 6.5 GHz. The two pole filter is designed using a coupled-resonator approach to operate at 2.44 GHz with 1.9% fractional bandwidth. The presented design approach simplifies evanescent-mode filter fabrication, eliminating the need for micromachining and vias, and achieving a total weight of 1.97 g. The design is fabricated to provide a proof-of-principle for the high-Q resonator and filter that compromises between performance, cost, size, and complexity. A stacked version of the two-pole filter is presented to provide a novel design for multi-layer embedded applications.
The fabrication is performed using an nScrypt Tabletop 3Dn printer. Acrylonitrile Butadiene Styrene (ABS) (relative permittivity of 2.7 and loss tangent of 0.008) is deposited using fused deposition modeling to form the antenna, array, resonator, and filter structures, and Dupont CB028 silver paste is used to form the conductive traces conductive regions (the paste is dried at 90 °C for 60 minutes, achieving a bulk DC conductivity of 1.5×106 S/m.). A 1064 nm pulsed picosecond Nd:YAG laser is used to laser machine the resonator and filter input and output feedlines.
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Li, Chien-Hua, and 李建樺. "Design of Dual-Band Printed Dipole Antennas and Study of Active Antenna Systems." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/29361580965275499214.
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碩士國立臺灣大學
電信工程學研究所
93
In this thesis, we have designed two antennas, one is double step-type microstrip line fed rectangular slot dipole antenna operated at the band of IEEE 802.11b, the other is the microstrip line fed dual-band printed dipole antenna operated at the band of IEEE 802.11a/b/g. Full-wave simulation software IE3D & HFSS used in this thesis, the resonant frequencies, bandwidth, return loss, input impedance and radiation pattern are studied completely by various antenna size parameter. Step-type MS line feeding enhances the bandwidth, the bandwidth covering 2GHz~3GHz is about 41.2%.Furthermore,we try to reduce ground size, and then we trade-off between size and bandwidth. MS line fed dual-band printed dipole antenna are studied to cover 2.4GHz~2.4835GHz, 5.15GHz~5.35GHz, 5.725GHz~ 5.825GHz for all WLAN IEEE802.11a/b/g. Finally, we combine with the low noise amplifier and the double step-type microstrip line fed rectangular slot dipole antenna, and then we measure the radiation pattern for this active antenna module. The total noise figure of all receivers is discussed. The research of the RF receiving system will be mentioned in this thesis, too.
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Chen, Jia-Mau, and 陳佳錨. "Investigation and Realization of Printed Dipole Antenna for WLAN Applications." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/87235759944242711262.
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碩士國立高雄應用科技大學
電子與資訊工程研究所碩士班
92
In this paper, most of dipole antenna is devised in dual-band operation for WLAN application. Some designs are developed in tri-band operation for DCS / WLAN bands. The dipole antenna is easily fed by a pair of parallel metal strips printed on the opposite sides of the dielectric substrate. The parallel metal strips are connected to a 50 microstrip line with a truncated ground plane. Several kinds of design, slited dipole antenna, meander dipole antenna.
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Yang, Cheng-Da, and 楊政達. "Printed-Circuit Elliptical Dipole Antenna for 3.1-10.6 GHz UWB Application." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/57148679644607193970.
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碩士樹德科技大學
電腦與通訊研究所
97
Printed-circuit board (PCB) antenna with useful bandwidth covering from 3.1 GHz to 10.6 GHz is suitable for wireless ultra wideband (UWB) application. Firstly, we present UWB developed and application. Next, to present a low profile, elliptical antenna etched on PCB with dielectric constant 4.2 achieving the above specified bandwidth. And then, to reduce the size of the product, an elliptical dipole antenna with PCB dielectric constant 10.2 has been fabricated. Swept frequency return loss, impedance and radiation patterns of these antennas have been measured. Design criteria for this elliptical dipole antenna is also investigated.
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Yeh, Shu-An, and 葉樹安. "Designs of Double-Sided Printed Dipole Antenna for Ultra-Wideband Communication Systems." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/01471423859924354698.
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碩士正修科技大學
電子工程研究所
95
Two novel designs, printed ultra-wideband (UWB) dipole antennas are presented in this article. Unlike the conventional traditional antennas, the proposed antenna had one half of radiating element dipole antenna printed on each side of a microwave substrate respectively. The proposed antenna which were fed by a 50Ω microstrip line, generate the desired ultra-wideband operation. One of proposed designs is a double dipole antenna for operations bandwidth over 3~11 GHz. Antenna gain of this design is between 1.7~4.8dBi. The second design is proposed by using Vee dipole structure. The operation bandwidth is over 3.08~11GHz and its maximum gain is 7dBi. The experimental results indicate the both designs are suitable for ultra-wideband communication systems.
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Lu, Yi-Fong, and 盧宜鋒. "Design and Development of Printed Dipole Antenna Array for IEEE 802.11a Applications." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/97429969870477862651.
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碩士國立臺灣大學
電信工程學研究所
93
In this thesis, printed dipole arrays with corner reflector fed by microstrip and twin line are designed at 5GHz for WLAN system application. The quarter-wavelength transformer is used for impedance matching. For verification, prototypes are implemented and measured at 5~6GHz with Duroid RO4003 PCB. Results show that good gain spectrum and impedance matching are obtained. In addition, the HPBW of the radiation pattern meets the design goal.
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Su, Chin. "UWB Double-Sided Printed Trapezoidal Dipole Antenna Fed by Parallel Strip Line." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2507200710513301.
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Chou, Hung-Chi, and 周弘基. "Design of Printed Dipole Antenna for High-Speed Wireless Network Wearable Applications." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/zyc68k.
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碩士元智大學
通訊工程學系
106
In wireless communication, the antenna plays a very important role. The wireless transmission needs to complete the transmission and reception of signals through the antenna. With the rapid development of science and technology, wearable electronic products have become more frequent in the market. Many electronic products operate at frequency in the 2.4 GHz band, such as WLAN which uses the specification of 802.11b, 802.11g, and 802.11n, Bluetooth system. To many users have degraded the quality of communications. This thesis will design the antenna for the 5 GHz band specified by 802.11ac. This thesis proposes the application of a printed dipole antenna combined with an electromagnetic bandgap structure to implement a wearable device antenna. In order to have a higher transmission rate, use two antennas to explore the MIMO antenna architecture and reduce the coupling between the antennas by increasing the current loop. The isolation of the MIMO antenna is lower than –15 dB in the frequency band. The full article uses full wave solver ANSYS HFSS to simulate and design the antenna architecture. Antenna characteristic are verified by actual measurement. The measured antenna operating frequency range is from 5.1 to 5.9 GHz and measured in a non-reflective antenna chamber. The front to back ratio is greater than 12 dB and has a good radiation pattern.
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Wang, Chih-Hsiang, and 王志祥. "Design of Printed Dipole Antenna Array for Wi-Fi Access Point Application." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/zumscu.
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碩士國立中央大學
電機工程學系
106
Designs of series-parallel linear antenna array with parallel plate line (PPL) are discussed in the thesis. In the section regarding the antenna array, two series antenna arrays are fed in parallel by using a 100-Ω PPL and a quarter-wavelength impedance transformer. In addition, a 50 Ω coaxial cable is used as the overall antenna feed. The serial-parallel feeding method can suppress the frequency scanning and maintain the deflection angle in frequency band within 5 degrees. The antenna array is respectively designed on the FR4 and Kappa 438 substrates. The influence of the dielectric loss on the antenna gain and the effect of series energy sharing among elements are observed and discussed. The specified frequency band is from 5.15 GHz to 5.85 GHz, which is for the Wi-Fi and WHDI applications. In the antenna array of twelve elements produced on the Kappa 438 substrate, the gain deviation within 1 dB in the band has been achieved, with a measured average peak gain of 7.26 dBi and a maximum peak gain of 7.70 dBi. The full-wave simulation software used in the thesis is HFSS, and the circuit simulation software is ADS.
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Li, Chien-Pang, and 李建邦. "Design of Printed Dipole Antennas and their Applications to 2.4 GHz Wireless LAN and Smart Antenna System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/89590477793230169355.
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碩士國立交通大學
電信工程系
87
In this article, a mixed potential integral equation (MPIE) is first derived and then solved by the method of moment (MOM). We use moment method to analyze the printed dipole antenna and to estimate some phenomenon caused by coupling effect. Besides, we develop two similar prototypes of the printed dipole antenna. One has the resonant frequency of 1.88GHz for Smart Antenna System application. The other's resonant frequency is 2.45GHz for Wireless Local Area Network (WLAN) interface card. A Smart Antenna System has several element antennas and it is able to steer its main radiating beam. Thus, to ensure the antenna array working well, the performance of a single antenna element is very important. For cheaper and more available PCB substrate source, the FR4 PCB substrate is chosen to layout the element antenna. Since the Smart antenna system is a multi-element array, the coupling effect existing between each element antenna can affect the antenna impedance and distort the radiation pattern. A proper countermeasure is taken to reduce the coupling effect. The arrangement of each antenna element position also have the influence of the coupling effect .We provide a suitable arrangement to reduce the effect. It is necessary to control the amplitude and the electric phase of each element, then the array can steer its radiation beam. We suggest a possible method to collect the amplitude and the electric phase respective to each scanning angle. In the application of WLAN card, the consideration of the antenna "Diversity" has to be cared because of the complexity of the indoor radio propagation environment. Thus, we develop a switch circuit combined with two identical printed dipoles. This design can improve the transmitting and receiving ability of the antenna. Finally, we realize the antenna for WLAN card and test it on personal computers.
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Wei, Pai Hung, and 魏百鴻. "Designs of Inkjet-Printed Dual-Dipole Antenna and Darlington Cascode Power Amplifier With High Linearity." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/vt28a2.
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鄭力元. "Design of Novel Multi-Band Printed Dipole Antennas and Miniaturized Printed Folded Dipole Antennas." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/49105943661162720962.
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碩士國立交通大學
電信工程系所
97
Multi-band printed dipole antennas with brand-new structure are presented in first part of this thesis. Unlike traditional dipole antenna fed from the center, a printed dipole antenna integrated with modified microstrip ring hybrid can realize a novel model of dipole antenna which is fed from end to end. Because the phase difference and magnitude ratio of signals from two output ports of microstrip ring hybrid vary from frequency to frequency, balanced and unbalanced signals will be produced to form different resonant mode and relative effective radiaton path. Furthermore, there is more then 80% -10dB return loss bandwidth in input signal of microstrip ring hybrid. This thesis combines above aspects with sophisticated integration and design to achieves a target of multi-band and wideband operation of printed dipole antenna successfully. A new method of antenna miniaturization is presented in second part of this thesis. Adding symmetric annular parasitic conductor of appropriate shape and size to folded dipole, image current will be induced in annular parasitic conductor while the total radiation length will be increased. Moreover, annular parasitic conductor with induced current working as loop antenna will be resonated to radiate and provide its resistance in series with folded dipole simultaneously. Among above process, the inductive reactance will be produced by the structure carrying closed current loop to compensate capacitive dipole antenna at lower frequency, and it eventually attains the objective of bringing about large amount of drop in resonant frequency of proposed antenna successfully. The design of 1.4GHz printed folded dipole antenna with one side meandering is taken as elementary antenna. After integrating elementary antenna with annular parasitic conductor, the resonant frequency can drop from 1.4GHz to 0.87GHz, and the good radiation property still be maintained. The effect of annular parasitic conductor toward printed folded dipole antenna and the physical mechanism and principle which cause frequency drop will be further discussed in our research of this thesis.
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Wu, Fu-Jui, and 吳府叡. "Double-Sided and Printed Wideband Dipole Pair Antennas Design." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/75w26c.
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碩士國立臺灣科技大學
電子工程系
94
In thesis, In ISM band the printed dipole array antenna is proposed. The printed dipole array antenna consists of one dipole array arranged back to back and can be easily formed by printing on both sides of a dielectric substrate. Based on the matching theory, which includes of a 50Ω microstrip feed line with open stub matched circuits is designed. Properties of the radiator as an array element have also been investigated. Simulator IE3D is used to verify our analysis. The dipole antenna is a very simple antenna suitable for use when a nearly omnidirectional pattern is required. However, its gain is low. In many communication systems, one is interested in point-to-point communication, and a much more highly directive beam of radiation can be used to advantage. By arranging several dipoles into an array, a higher directive beam of radiation can be obtained. A more directive beam means that the antenna will also have a higher gain. In addition to single band antenna, we utilize parallel LC resonator to design a dual-band antenna for wireless LAN. Both simulation and measured data are pretty matched. The printed dipole two elements array antenna achieves gain for 5.2 GHz band to be about 3-4.6 dBi with 800MHz bandwidth. The printed dipole four elements array antenna achieves gain for 5.2 GHz band to be about 5-6.4 dBi with 400MHz bandwidth. Both simulation and measured results are highly matched. The printed dipole array antenna which is economic cost has been proposed and successfully implemented.
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Pang, Yi-Hsin, and 龐一心. "Fabrication and Analysis of Printed Dipole Antennas for Wireless LANs." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/22918216739488857844.
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碩士國立臺灣大學
電機工程研究所
84
For the sake of mobility and convenience, wireless communication has recently got most of the attention. For the use of personal wireless data communication, this study proposed two types of printed dipole antennas, one of which is together with the planar-type balun design. We also adopt the space domain analysis to investigate the properties of these antennas. This analysis is based on the mixed potential integral equation formulation and the method of moments. It is suitable for the radiation or scattering problems due to the arbitrarily shaped antenna on a layered substrate. Finally, numerical results are included for both theoretical analysis and experimental measurement, and some discussion is given.
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Liang, Jia-Wei, and 梁佳瑋. "Wideband Printed and Double-Sided Dipole Pair Antennas with a Parallel Reflector." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/16049581289789202810.
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碩士國立臺灣科技大學
電子工程系
93
In the thesis, in ISM band the printed dipole array antenna is proposed. The printed dipole array antenna consists of one dipole array arranged back to back and can be easily formed by printing on both sides of a dielectric substrate. Based on the matching theory, which includes of a 50Ω microstrip feed line with open stub matched circuits is designed. Properties of the radiator as an array element have also been investigated. The dipole antenna is a very simple antenna suitable for use when a nearly omnidirectional pattern is required. However, its gain is low. In many communication systems, one is interested in point-to-point communications, and a much more highly directive beam of radiation can be used to advantage. By arranging several dipoles into an array, a higher directive beam of radiation can be obtained. A more directive beam means that the antenna will also have a higher gain. In this thesis, the use of printed and doubled-sided dipole pair wideband antennas with parallel reflector in application of 2.4 GHz ISM band has been demonstrated. It has been shown that dipole antenna array with high gain and broadband for VSWR 1.5 can be achieved. According to the measured results, The printed dipole array antenna achieves gain for 2.45GHz band to be about 3.5-4.5 dBi with 570MHz bandwidth and the reflector antenna has a gain of 5.3-7.0 dBi with a 310MHz bandwidth, respectively. The 8-element printed dipole array antenna without and with reflector have gain of 8.5-9.3 dBi with a 200MHz bandwidth and gain of 12-13 dBi with a 70MHz bandwidth, respectively. Both simulation and measured results are highly matched and verify our previous analysis.
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林裕荃. "A Design of the Multi-band Print Dipole Antenna Array." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/90639923240916795331.
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碩士明新科技大學
電子工程研究所
98
Communications services in recent years opened up to private enterprise into the wireless communications industry in many. So with the progress of wireless communication technology and personal mobile communications in popularity. So the communication products, light in appearance and function has become a trend in the consumer market. Relatively large amount of user data for transmission is increasing demand. So the city in recent years widespread deployment base station covers almost every area. But in the dense urban environment of buildings will result in less than a small part of the area and indoor communication signal is so weak and so the problem is not good. Therefore, a more efficient use of antennas to improve the communication quality of the future is necessary. However, to achieve consistent mobile communication system antenna is to have high gain and multiple frequency band operation. In this paper proposes a kind of multi-band printed dipole antenna and to such structures as the element antenna. While progressively designed two - element and four - element of the printed dipole antenna array. The proposed antenna array using a 50-ohm coaxial cable as the feed line and using the parallel - strip line and ground as feed into the network. In order to verify the proposed printed dipole array antenna with multi-band and gain additional characteristics. So we try to use FR4 circuit board substrate as the antenna at the same time by the university's wireless communications laboratory equipment for measurement antenna pattern and gain certification. Experimental measurements obtained in the return loss <-10dB conditions of operating frequency range can cover 860 to 1088MHz and 1700 to 2530 MHz. So it does have a multi-band characteristics. Therefore, this multi-band printed dipole antenna array can be effectively applied such as GSM, DCS, PCS, UMTS and WiFi wireless mobile communication systems such as external antennas and repeaters for use.
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邱敏宏. "A Design and Application of Multi-band Bow-Tie Print Dipole Antenna Arrey." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/71163702503176049361.
Full textAbstract:
碩士明新科技大學
資訊管理研究所
98
Abstract With development and progress of wireless communication science and technology, have held the communication system of action and has already been transferred from pronunciation communication to the video-information communication, to a large number of demand that materials transmit, raise to have, link 3G era in function such as network further at the same time. So the already becoming the trend of the consumer market with the multi-function light and handily, esthetically of communication products. To action communication system that the current various countries use, its frequency band of operation, although had nothing in common with each other, the extensive cloth in platform on the base was built, several has already contained each area. But direct it against the intensive environment of urban building, will still cause some electric wave signals of area to be faint or question of interfering with etc.. So use the more efficient antenna, it is that has its essential one that to improve communication quality, as to technology at the present stage, it accords with the antenna described above to want to reach, should have higher gain and operation in many frequency bands beyond the scope of the antenna. Because of the aforesaid reason, this thesis is planned in order to print the dipole array antenna of the bow tie as studying the direction, the traditional dipole .The antenna changes, in order to design the dull and stereotyped unit antenna that many frequency bands operated the characteristic. Then print a lot of on the dipole unit antenna of the bow tie and make up and become and have the higher array antenna that gained. We will probe into the operation frequency of the antenna forms proposed and valid frequently wide relevant changes of impedance too in the course of designing, utilize it a metal radiation of joining in order to improve this pointing to which prints the dipole array antenna of bow tie finally, in order to meet communication system ofextant action's demands. This text mentions and prints the dipole array antenna of the bow tie, via doing in fact and quantity examine the result, we get array this impedance of antenna frequently wide and already satisfied can make, use current a lot of wireless action communication system foring, such as GSM (860-960M Hz ),DCS (1710- 1880MHz),PCS (1850- 1990MHz) And UMTS (1920-2170MHz),Wireless Lan (802.11a/b/g/n)…a lot of wireless action communication system Antenna. Keywords：Dipole ANTENNA、Array ANTENNA、Dipole Array ANTENNA、Bow-Tie ANTENNA、Bow-Tie Dipole Array ANTENNA。
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宋明訓. "Study and Design of the Multi-band Print Dipole Antenna with Square-ring." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/52356909741600386581.
Full textAbstract:
碩士明新科技大學
電子工程研究所
99
As the fast development of the wireless telecommunication industry the quality of wireless telecommunication services is improved by paying great attention on the efficiency and performance in a wireless communication system. There are many studies to achieve better radiation characteristics of antenna by controlling the radiation patterns. Therefore, the development of antenna is very robust. And make a show of a different feature along with the different times. For example, cellular phone antenna how do smallerly even can conceal and let user Hun however don't feel a green cellular phone And how only Be operated to manies with the same antenna repeatedly the segment become a dual-band, three repeatedly or much and repeatedly antenna. How design the pattern of antenna to let user in spite of can receive the signal of same strength in distance and neighboring districts must depend on a design just can reach. This paper presents a variety of bands with half wavelength multi-frequency and square-ring printed dipole antenna. And design into a 1 x 2 of the array antenna make make gain increment. Using IE3D simulated and experimental measurements obtained in the S11 <-10dB conditions of operating frequency range can cover 866 to 962MHz and 1660 to 2810 MHz. So it has the multi-band characteristics. Therefore, this multi-band printed dipole antenna can be effectively applied such as GSM(890~960MHz)、DCS(1710~1850MHz)、PCS(1850~1990MHz)、UMTS(1920~2170MHz)、WiFi(2402 ~ 2480MHz) and WiMAX（2500~2690MHz）wireless mobile communication systems.