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An Ultra-Wideband Bandpass Frequency Selective Structure Based on Hybrid Multimode Resonators 一种基于混合多模谐振器的超宽带带通选频结构
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/apmc46564.2019.9038616
Hanxuan Li, Bo Li, Lei Zhu
{"title":"An Ultra-Wideband Bandpass Frequency Selective Structure Based on Hybrid Multimode Resonators","authors":"Hanxuan Li, Bo Li, Lei Zhu","doi":"10.1109/apmc46564.2019.9038616","DOIUrl":"https://doi.org/10.1109/apmc46564.2019.9038616","url":null,"abstract":"In this paper, an ultra-wideband (UWB) bandpass frequency selective structure (FSS) based on hybrid multimode slotline-microstrip-slotline resonators is presented. The proposed FSS consists of a periodic array of stacked slotline-microstrip-slotline structures, which can achieve mode conversion between the incident spatial waves and the guided waves. Then, by constructing multimode resonators in the hybrid slotline-microstrip-slotline structures, a UWB bandpass response can be achieved with multiple in-band transmission poles. Furthermore, by introducing cross-couplings between the first and last slotline resonators, a pair of transmission zeros are generated at both sides of the desired passband to enhance the roll-off-slopes and the out-of-band performance. In order to verify the concept, a proposed FSS example is designed and fabricated. The measured results exhibit UWB bandpass filtering responses with seven inband transmission poles and a pair of transmission zeros close to the passband, which indicates 117% fractional bandwidth.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124364569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Compact Low-Pass Filter Based on Spoof Surface Plasmon Polaritons Using Defected Ground Structure 利用缺陷地面结构欺骗表面等离子体激元的紧凑低通滤波器
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038700
Dawei Zhang, Kuang Zhang, Ruiwei Dai, Qun Wu, T. Jiang
{"title":"A Compact Low-Pass Filter Based on Spoof Surface Plasmon Polaritons Using Defected Ground Structure","authors":"Dawei Zhang, Kuang Zhang, Ruiwei Dai, Qun Wu, T. Jiang","doi":"10.1109/APMC46564.2019.9038700","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038700","url":null,"abstract":"In this work, defected grounded structure (DGS) is employed to a spoof surface plasmon polaritons (SSPPs) unit. Dispersion properties of SSPPs and normalized impedance the unit are analyzed. Based on a smooth transition with simple structure and small size, a compact low-pass filter based on SSPPs is designed. Excellent simulated results (return loss lower than −15.8dB up to 10.1GHz) shows a good balance between broadband features and compact size. This work can find significant potential applications in microwave devices.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124527006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Continuous Beam Steerable Parasitic Antenna Array 连续波束可控寄生天线阵列
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038309
A. H. Hadi, N. M. Shah, M. Y. Ahmad, Tengku Faiz Tengku
{"title":"Continuous Beam Steerable Parasitic Antenna Array","authors":"A. H. Hadi, N. M. Shah, M. Y. Ahmad, Tengku Faiz Tengku","doi":"10.1109/APMC46564.2019.9038309","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038309","url":null,"abstract":"This paper proposes a parasitic antenna array for continuous beam steering at 900 MHz. Pattern reconfigurable or beam steerable antenna is in demand nowadays especially for wireless systems such as wireless power transfer (WPT) system. Various research has been conducted to improve the reliability of WPT due to its ability to overcome the drawbacks of conventional power supply such as battery that has limited lifetime and wire or cable that might break. Hence, an effective power transfer is desired for power to be supply sufficiently. This can be achieved by implying a directive and steerable antenna to the system. Incorporation of varactor diode on parasitic antenna array is able to attain these properties. The designed antenna in this study consists of 3 layers; (1) a driven element and parasitic stubs, (2) four parasitic dipoles and two shorted dipoles, (3) two parasitic dipoles. FEKO software is used to design and simulate the proposed antenna array. Each parasitic dipole is loaded with varactor diodes in order to control the capacitance. By varying the capacitance at appropriate parasitic dipoles, the beam can be steered from 0° to 80° with 5° steps in the azimuthal plane. The peak gain of the array approximately around 7.5 dBi, while the beamwidth range from 64° to 93°.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126255363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Circularly Polarized Slot Antenna Based on Half-Mode SIW Cavity 基于半模SIW腔的圆极化槽天线
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038622
Shengnan Zhao, Zhan Wang, Yuandan Dong
{"title":"Circularly Polarized Slot Antenna Based on Half-Mode SIW Cavity","authors":"Shengnan Zhao, Zhan Wang, Yuandan Dong","doi":"10.1109/APMC46564.2019.9038622","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038622","url":null,"abstract":"This paper presents a slot antenna with circularly polarized (CP) radiating pattern based on half-mode substrate integrated waveguide (SIW) cavity. A quarter-wavelength slot and three inserted metalized via arrays are employed to form the cavity backed slot radiator. Furthermore, the CP radiation has been achieved by a quarter-wavelenth slot mode and a half-mode SIW cavity which are orthogonal to each other. The antenna is fabricated on a low-cost FR4 board. The antenna bandwidth covers the frequency range 2.4-2.48 GHz for| S11| < −10 dB. The axial ratio (|AR| < 3 dB) frequency band is from 2.452 to 2.472 GHz. The measured maximum gain and radiation efficiency of the prototype are better than 2.4 dBi and 48 % within the impedance bandwidth, respectively. Therefore, it's very suitable for low-cost WIFI application which requires directive CP radiation.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126304150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Transmission-Line Approach to Zero-Index Materials for Invisible Cloaks 隐形斗篷零折射率材料的在线传输方法
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/apmc46564.2019.9038216
T. Nagayama, Shohei Kakoi, S. Fukushima, Toshio Watanabe
{"title":"Transmission-Line Approach to Zero-Index Materials for Invisible Cloaks","authors":"T. Nagayama, Shohei Kakoi, S. Fukushima, Toshio Watanabe","doi":"10.1109/apmc46564.2019.9038216","DOIUrl":"https://doi.org/10.1109/apmc46564.2019.9038216","url":null,"abstract":"A design method for two-dimensional (2-D) zero-index materials (ZIMs) is presented based on the transmission-line (TL) approach in order to realize invisible cloaks for hiding objects. A simple 2-D distributed TL model is proposed and the formula to calculate the dispersion characteristics is theoretically derived. It is shown from the calculated dispersion characteristics that a Dirac cone is always formed at the T -point without adjustments of the unit cell for the degeneration of propagation modes and ZIMs can be easily designed with the proposed model. In addition, a ZIM operating at 5 GHz is designed with the proposed model, and its cloaking operations and the validity of the design theory are demonstrated by circuit simulations.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126201973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Elliptical UWB Monopole Antenna with Low cross Polarization using Non-Concentric slotted Open-ended rings 采用非同心开槽开放式环的低交叉极化椭圆超宽带单极天线
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038815
G. Reddy
{"title":"Elliptical UWB Monopole Antenna with Low cross Polarization using Non-Concentric slotted Open-ended rings","authors":"G. Reddy","doi":"10.1109/APMC46564.2019.9038815","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038815","url":null,"abstract":"In this work a compact, low cross - polar, printed elliptical ultrawide band monopole antenna with a size of 26 20 mm2 is presented. For achieving ultrawide bandwidth and low cross - polarization level, proposed antenna employs a partial ground structure and a set of slotted rings which constitutes open ended slotted rings structure respectively. The effects of slotted rings and partial ground have been tested and compared with similar antenna without open ended slotted rings structure. Based on measured results it is observed that the proposed antenna with open ended slotted rings structure covers an ultrawide bandwidth of 9 GHz i.e. from 3.5 GHz to 12.5 GHz with cross - polarization level of less than 20 dB throughout 9 GHz bandwidth. Furthermore, the proposed antenna provides an average gain of 3.5 dBi with peak gain of 5 dBi at 8 GHz with constant group delay of less than 1.5 ns through the operating bandwidth.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126502349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Breast Cancer Hemispheric Shaped Hyperthermia System Designed with Compact Conformal Planar Antenna Array 紧凑型共形平面天线阵列设计的乳腺癌半球形热疗系统
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038379
Alireza Dadzadi, R. Faraji-Dana
{"title":"Breast Cancer Hemispheric Shaped Hyperthermia System Designed with Compact Conformal Planar Antenna Array","authors":"Alireza Dadzadi, R. Faraji-Dana","doi":"10.1109/APMC46564.2019.9038379","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038379","url":null,"abstract":"This paper describes the design of a novel 1.8 GHz hemispheric shaped hyperthermia system for clinical breast cancer treatment. The electromagnetic waves are focused in arbitrary locations with the aid of the Time Reversal (TR) technique. In this way a compact conformal planar antenna is designed to reduce mismatching between applicators and the breast tissue. The designed antenna presents 88% S-band fractional bandwidth for various kinds of breast tissues with different dispersion properties. It is shown that by employing an array of 16 antennas each carrying 1.5 W power, the tumour temperature can be increased to 43°C within 30 minutes of the heating process.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126543160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Design Procedure of a Microstrip Filter Facilitated by Lumped-Element Equivalent Circuit Representation 集总元件等效电路表示法的微带滤波器设计过程
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038699
Bin Yuan, YinSen Che, Fei Xiao, Jing Lei, Xiaohong Tang
{"title":"Design Procedure of a Microstrip Filter Facilitated by Lumped-Element Equivalent Circuit Representation","authors":"Bin Yuan, YinSen Che, Fei Xiao, Jing Lei, Xiaohong Tang","doi":"10.1109/APMC46564.2019.9038699","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038699","url":null,"abstract":"In this paper, a lumped-element equivalent circuit is derived for representing a microstrip filter so that the physical mechanism of the latter is expounded. If conventional filter synthesis technique is used to synthesize this equivalent circuit, the electric parameters or structural parameters of the microstrip filter can be determined by virtue of equivalence relationship from the lumped-element values. The analysis shows that the latter is capable of realizing a third-order quasi-Elliptic bandpass response. The response has two transmission zeros adjacent to its passband, which effectively improve frequency selectivity. The design procedure is summarized to facilitate its practical use. Finally, an example is presented for demonstration.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128025473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Improvements of Transfer Efficiency in Capacitive Wireless Power Transfer Under Seawater 海水下电容式无线电力传输效率的提高
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038820
Kousuke Murai, Masaya Tamura
{"title":"Improvements of Transfer Efficiency in Capacitive Wireless Power Transfer Under Seawater","authors":"Kousuke Murai, Masaya Tamura","doi":"10.1109/APMC46564.2019.9038820","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038820","url":null,"abstract":"In this paper, the efficiency improvement in an electric coupler using an electric double layer was presented. High efficiency of a capacitive coupler can be achieved under seawater because the Q-factor improves when using an electric double layer. First, to reveal area characteristics of dielectric constant and Q-factor by measuring of seawater for an optimized design, we built an approximate expression for electromagnetic field analysis. By adjusting the electrode area and distance of an adjacent electrode of capacitive coupler using the approximated Q-factor to optimize the structure, a transmission efficiency of 92.0% in simulation was achieved. Finally, maximum power transfer efficiency of 85.0% in measurement was achieved.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128113160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Miniaturization of a 3-way Power Divider using Defected Ground Structures 使用缺陷接地结构的3路功率分压器小型化
2019 IEEE Asia-Pacific Microwave Conference (APMC) Pub Date : 2019-12-01 DOI: 10.1109/APMC46564.2019.9038858
Memoona Farooq, A. Abdullah, M. Zakir, H. M. Cheema
{"title":"Miniaturization of a 3-way Power Divider using Defected Ground Structures","authors":"Memoona Farooq, A. Abdullah, M. Zakir, H. M. Cheema","doi":"10.1109/APMC46564.2019.9038858","DOIUrl":"https://doi.org/10.1109/APMC46564.2019.9038858","url":null,"abstract":"Defected Ground Structures (DGS) have been utilized to manipulate the ground currents to achieve various electromagnetic properties including miniaturization, filtration and increase in directivity. This paper presents the application of Split Ring Resonator (SRR) as DGS on a three way power divider which alters the divider properties to match slow wave structures, thereby achieving reduction in size. Through placement of defects at two optimized locations, in contrast to conventional techniques of loaded lines and repetitive structures, the miniaturized divider attains similar results as the primary divider. In comparison to the original dimensions of 30.5 x 26.8 mm2, the miniaturized version measures 26.5 x 20.8 mm2 resulting in a collective area reduction of 32.6%.","PeriodicalId":162908,"journal":{"name":"2019 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121945867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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