{"title":"DC-10 GHz Compact On Chip Low-Pass Filter With Wide Stopband","authors":"Yan Jiang, Wanchun Tang, Zhengyong Yu, Linping Feng, Jianxiao Liu, Mengxia Zhou","doi":"10.1109/APCAP50217.2020.9245968","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9245968","url":null,"abstract":"A compact low-pass filter with wide stopband performance is presented using integrated passive device technology on GaAs substrate in this paper. A low-pass filter structure with LC parallel resonant and stub loaded capacitor, which can provide good upper stopband performance. The return loss is greater than 14.5 dB, while insertion loss is less than 2.37 dB from DC to 10 GHz. The stop band corresponding to 30 dB rejection is from 13 GHz to 45 GHz. The out band rejection is better than 64 dB at 18 GHz and 35.8 GHz. The whole size of the proposed low-pass filter chip, is only 1.81×0.65 mm2, i.e. 0.227×0.08 λg2, including the measured ground-signal-ground (GSG) pad.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120960042","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}
{"title":"Beamforming a Holey-Plate Array with Random Circular Slots at Millimeter-Wave","authors":"Shihyuan Yeh","doi":"10.1109/APCAP50217.2020.9245960","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9245960","url":null,"abstract":"An indirect beamforming technique implemented on a metal plate with randomly distributed circular slots is investigated at millimeter-wave in this work. The goal seeks to develop a succinct array system with a high directivity and a low sidelobe level (SLL), as well as beam scan characteristics. The indirect beamforming technique steers the array main beam by changing the angles of the incident waves. Simulations are implemented, and the results are explained to verify the validity of the array design.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129964018","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}
Zhang Xiaohong, L. Xiaochun, Sun Shining, Pang Xiaoyu, Deng Jinshan
{"title":"A Hybrid Structure Design of Broadband band-pass MEFSS and FSS","authors":"Zhang Xiaohong, L. Xiaochun, Sun Shining, Pang Xiaoyu, Deng Jinshan","doi":"10.1109/APCAP50217.2020.9246043","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9246043","url":null,"abstract":"Miniaturized element frequency selective surface (MEFSS) design technology is one of the research hotspots in recent years, the application space of frequency selective surface (FSS) has been expanded, especially in low-frequency applications, surface shaping applications and other fields. In this paper, we provide a design of MEFSS unit and loaded on the dual screen FSS. Compared with the original dual screen FSS, the simulation results shows that the hybrid structure with loading MEFSS present a wider bandwidth, giving faster roll off in sidebands, and the cut-off is obviously improved, it also can ensure insensitivity to incident angle variation and polarization.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131052734","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}
{"title":"Compact Triple-mode HMSIW Filter Using Quarter-Wavelength Co-planar Waveguide","authors":"Tingting Yu, F. Xu, Yamei Zhang","doi":"10.1109/APCAP50217.2020.9246003","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9246003","url":null,"abstract":"A Compact triple-mode half-mode SIW (HMSIW) filter incorporated with quarter-wavelength co-planar waveguide is proposed in this paper. TE202 mode is towards to the higher frequency by introducing the second via-hole in the cavity. A pair of quarter-wavelength co-planar waveguides (CPWs) resonators is introduced on the open-side of the HMSIW, which can reduce the resonant frequency of the second mode.After working principle and design method of this proposed filter are well-illustrated, a prototype with 15 dB fractional bandwidth of 10.4% at 4.8 GHz is finally designed. And the upper stopband is up to 1.44f0 with the rejection level larger than 20 dB.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"3 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131976542","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}
Wenjun Zhou, Ruidi Qi, Yuping Shang, C. Liao, Lixin Dang
{"title":"Boresight Gain Enhanced with Cylindrical Metasurface Lens","authors":"Wenjun Zhou, Ruidi Qi, Yuping Shang, C. Liao, Lixin Dang","doi":"10.1109/APCAP50217.2020.9245985","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9245985","url":null,"abstract":"In this paper, a transmission-type electromagnetic metasurface lens which can be conformal to a cylindrical surface is designed and employed to enhance the boresight gain of a feeding antenna. The objective gradient of the transmission phase is formulated and implemented with four-layer slot unit cells. Focused electric field strength and power density are observed for a TM-polarized plane electromagnetic wave illumination at the designed focal point. Using a traditional probe-fed microstrip antenna as feeding, the cylindrical lens antenna can enhance its boresight gain by 11.4 dB for TM-polarized radiation at 10 GHz.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116276136","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}
Cao Jing, Xue Xiaoqin, Li Qiang, Zhang Ruipeng, Song Ming, Song Weiyang
{"title":"A Space-time Adaptive Processing Algorithm Based on Multi-stage Wiener Filter","authors":"Cao Jing, Xue Xiaoqin, Li Qiang, Zhang Ruipeng, Song Ming, Song Weiyang","doi":"10.1109/APCAP50217.2020.9246125","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9246125","url":null,"abstract":"The space-time adaptive processing technology plays an important role in the antenna array signal processing station, which greatly improves the anti-interference performance. As the dimension of space-time processing increases, its computational volume also increases exponentially. Therefore, this paper uses dimensionality reduction to simplify the signal processing of the space-time array. Using an MSNWF algorithm can not only reduce the amount of calculation, but also will not affect the anti-jamming performance of the space-time algorithm.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129398913","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}
Yanchang Gao, Gang Ni, Kun Wang, Yiqing Liu, Chong He, R. Jin, Xianling Liang
{"title":"Single-Sideband Time-Modulated Phased Array With 2-bit Phased Shifters","authors":"Yanchang Gao, Gang Ni, Kun Wang, Yiqing Liu, Chong He, R. Jin, Xianling Liang","doi":"10.1109/APCAP50217.2020.9246018","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9246018","url":null,"abstract":"A novel single-sideband (SSB) time-modulated technique with 2-bit phase shifters is proposed. The time-modulated module is implemented by adding periodic phase modulation to 2-bit phase shifters, which is simpler without performance loss compared to existing SSB time-modulated method. During one modulation period, four phase states (0, π/2, π, 3π/2) of 2-bit phase shifters are switched in sequence. After the modulation, the SSB time modulation is realized and the main power is distributed to the first harmonic component. The feasibility of the proposed method is verified by experiments. The undesired harmonics are efficiently suppressed. Meanwhile, ±40 beam scanning range are realized through the proposed module.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134018046","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}
{"title":"An Ultra-Wideband Microstrip Antenna Based on Koch Fractal Resonance Unit and CSRRs Defective Ground Unit","authors":"Hua Yang, Weiming Yang","doi":"10.1109/APCAP50217.2020.9246026","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9246026","url":null,"abstract":"This paper presents a coplanar waveguide ultrawideband antenna based on Koch fractals and complementary open resonance rings. The antenna can work in the frequency band of 2.95-15.5GHz, which completely covers the entire ultrawideband antenna spectrum of 3.1GHz-10.6GHz, which can be used in communication. The overall size of the antenna is 35mm * 30mm * 1.6mm. The antenna is loaded with a triangular Koch fractal on a regular hexagon and etched a complementary open resonance ring on a coplanar waveguide. S11 is below -10dB in the 2.95-15.5GHz band, the bandwidth of the proposed antenna is significantly increased.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133644402","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}
{"title":"Dual-band high-efficiency transmission polarization converter based on stripe grating","authors":"Zehui Zhang, Hang Yu, Jianxun Su","doi":"10.1109/APCAP50217.2020.9246067","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9246067","url":null,"abstract":"A structure acting as a high-performance dual-band transmissive linear polarizer which can change the direction of linearly polarized waves is proposed. This unit cell consists of a multilayer structure with three metal grating plates and two dielectric plates. The top and bottom layers are exactly the same, and the structure is rotated relative to each other by 90°. The middle layer is a metal grating structure placed at an angle of 45° to the x-axis. The polarizer can convert incident linearly polarized waves into cross linearly polarized waves. We found that a very high linear polarization conversion rate (97%) was achieved in the 7-14.2 GHz band, and a good linear polarization conversion rate (93%) was also achieved in the 27.8-35.6 GHz band. At the same time, we verified the correctness of the simulation results through the transmission matrix method.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130582879","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}
{"title":"Wideband Scattering Analysis Method Based on Macro Block-Characteristic Basis Function Method and Interpolation for Large-Scale Finite Periodic Arrays with Planar Unit Cells","authors":"Sheng Zhang, P. Du, W. Fu","doi":"10.1109/APCAP50217.2020.9246119","DOIUrl":"https://doi.org/10.1109/APCAP50217.2020.9246119","url":null,"abstract":"An efficient algorithm based on the macro block-characteristic basis function (MB-CBF) method and the interpolation technique is proposed to analyze the wideband electromagnetic characteristics of the large-scale finite periodic arrays with planar unit cells. The MB-CBF method can greatly reduce the number of unknowns. It is the frequency-domain algorithm. When used for the frequency sweep, the impedance matrix needs to be calculated repeatedly at each frequency, which is very time consuming. To accelerate generation of impedance matrices, the interpolation technique is adopted. Simulation results show that the proposed algorithm is accurate and efficient.","PeriodicalId":146561,"journal":{"name":"2020 9th Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125856950","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}