Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977839
Sipei Cai, S. Liao, W. Che, Q. Xue
This paper presents a low-profile, high-efficiency isoflux beam circularly polarized antenna for CubeSat applications. It mainly consists of two parts, namely the high-efficiency feeding network and low profile circularly polarized radiator. The feeding network is based on a sequentially fed radial planar waveguide to reduce feeding length and thus improve efficiency. Several sets of concentric annular slots are cut on the radial planar waveguide, and corner-cut patches are placed on the slots, which realizes the radiator generating rotational symmetrical isoflux CP radiation. The proposed isoflux antenna features both low-profile and high radiation efficiency. A prototype operating at 8.4GHz is designed to prove the idea.
{"title":"A Low-profile High-efficiency Isoflux Antenna for CubeSat Applications","authors":"Sipei Cai, S. Liao, W. Che, Q. Xue","doi":"10.1109/IWS55252.2022.9977839","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977839","url":null,"abstract":"This paper presents a low-profile, high-efficiency isoflux beam circularly polarized antenna for CubeSat applications. It mainly consists of two parts, namely the high-efficiency feeding network and low profile circularly polarized radiator. The feeding network is based on a sequentially fed radial planar waveguide to reduce feeding length and thus improve efficiency. Several sets of concentric annular slots are cut on the radial planar waveguide, and corner-cut patches are placed on the slots, which realizes the radiator generating rotational symmetrical isoflux CP radiation. The proposed isoflux antenna features both low-profile and high radiation efficiency. A prototype operating at 8.4GHz is designed to prove the idea.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131569158","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977707
Leiqiang Ma, Le Dong, Yusheng Da, Hongping Li
In this paper, a flip-chip vertical interconnect transition structure is designed based on the existing integration process, and a 2GHz∼6GHz amplifier chip is integrated on LTCC circuit with leadless interconnection by using the flip-chip vertical interconnect transition structure. The integrated circuit is simulated, fabricated and measured, the simulated and measured results show a good match. It is a good reference for application of high density integration microwave microsystems.
{"title":"A Broadband Flip-Chip Microwave Amplifier on a LTCC Substrate","authors":"Leiqiang Ma, Le Dong, Yusheng Da, Hongping Li","doi":"10.1109/IWS55252.2022.9977707","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977707","url":null,"abstract":"In this paper, a flip-chip vertical interconnect transition structure is designed based on the existing integration process, and a 2GHz∼6GHz amplifier chip is integrated on LTCC circuit with leadless interconnection by using the flip-chip vertical interconnect transition structure. The integrated circuit is simulated, fabricated and measured, the simulated and measured results show a good match. It is a good reference for application of high density integration microwave microsystems.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132040643","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9978142
Rui Wang, Yongheng Mu, Zhou Du, Jinghui Qiu, J. Qi
Deep depth of focus (DoF) metalenses have wide application prospects in the fields of security inspection, biological observation, and 3D imaging. However, prevailing design approaches have inherent defects such as numerical aperture (NA) constraints and poor focal uniformity. To conquer these limitations, a complex-amplitude (CA) deep DoF metalens is demonstrated in the microwave region, enabled by the marriage of a novel 3D CA retrieval method and the C-shaped meta-atoms. An extended DoF of 6.9λ can be simulated, corresponding to the NA range from 0.8725 to 0.4582. Meanwhile, the lateral focal spot is uniformly distributed longitudinally, with the variance value of 21.03 in the focal spot diameter. The proposed retrieval method can provide an optimized design strategy for the deep DoF metalens, ensuring the DoF accuracy and the focal uniformity. The numerical comparison results prove the validity and superiority of this method.
{"title":"Complex-amplitude metalens with extended depth of focus and enhanced focal uniformity","authors":"Rui Wang, Yongheng Mu, Zhou Du, Jinghui Qiu, J. Qi","doi":"10.1109/IWS55252.2022.9978142","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9978142","url":null,"abstract":"Deep depth of focus (DoF) metalenses have wide application prospects in the fields of security inspection, biological observation, and 3D imaging. However, prevailing design approaches have inherent defects such as numerical aperture (NA) constraints and poor focal uniformity. To conquer these limitations, a complex-amplitude (CA) deep DoF metalens is demonstrated in the microwave region, enabled by the marriage of a novel 3D CA retrieval method and the C-shaped meta-atoms. An extended DoF of 6.9λ can be simulated, corresponding to the NA range from 0.8725 to 0.4582. Meanwhile, the lateral focal spot is uniformly distributed longitudinally, with the variance value of 21.03 in the focal spot diameter. The proposed retrieval method can provide an optimized design strategy for the deep DoF metalens, ensuring the DoF accuracy and the focal uniformity. The numerical comparison results prove the validity and superiority of this method.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133492504","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977822
Ruizhi Liu, Bo Jiang, Tianqi Fan, Lei Yang, Yue Lin, Hongtao Xu
Radar has been increasingly used in indoor applications. This paper introduces an indoor tracking system that uses a 24-GHz FMCW radar. Several methods are exploited to alleviate the problem of insufficient resolution caused by low bandwidth. To further distinguish stationary targets, a method based on moving target indicator is proposed. The results show that these methods are effective and two quasi-static targets can be successfully distinguished.
{"title":"An Indoor Human Tracking System Using a Compact 24GHz FMCW Radar with 250MHz Bandwidth","authors":"Ruizhi Liu, Bo Jiang, Tianqi Fan, Lei Yang, Yue Lin, Hongtao Xu","doi":"10.1109/IWS55252.2022.9977822","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977822","url":null,"abstract":"Radar has been increasingly used in indoor applications. This paper introduces an indoor tracking system that uses a 24-GHz FMCW radar. Several methods are exploited to alleviate the problem of insufficient resolution caused by low bandwidth. To further distinguish stationary targets, a method based on moving target indicator is proposed. The results show that these methods are effective and two quasi-static targets can be successfully distinguished.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133917827","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977743
Xinyu Liu, Beijia Liu, Jinghui Qiu
In this paper, a multi-layer transmission metasurface for high efficiency linear polarization (LP) conversion and beam control is proposed. The metasurface unit cell is composed of three layers of metal and two layers of dielectric. The top and bottom metal layers are orthogonal grids while the middle metal layer is C-shaped split ring. By altering the opening angle of C-shaped metal split ring, phase-gradient metasurface is proposed. Simulation results have proved that polarization conversion ratio (PCR) is above 90% and the beam of electromagnetic wave (EMW) can be refracted 30° at 10GHz, which is a good validation of the generalized Snell's law.
{"title":"A High-Efficiency Transmission Metasurface for Linear Polarization Conversion and Beam Control","authors":"Xinyu Liu, Beijia Liu, Jinghui Qiu","doi":"10.1109/IWS55252.2022.9977743","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977743","url":null,"abstract":"In this paper, a multi-layer transmission metasurface for high efficiency linear polarization (LP) conversion and beam control is proposed. The metasurface unit cell is composed of three layers of metal and two layers of dielectric. The top and bottom metal layers are orthogonal grids while the middle metal layer is C-shaped split ring. By altering the opening angle of C-shaped metal split ring, phase-gradient metasurface is proposed. Simulation results have proved that polarization conversion ratio (PCR) is above 90% and the beam of electromagnetic wave (EMW) can be refracted 30° at 10GHz, which is a good validation of the generalized Snell's law.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"407 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114015795","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977740
Runze Huang, Beijia Liu, Xinyu Liu, Jinghui Qiu
This paper presents a dual-band and polarization-independent metasurface with wide range of incident angle for harvesting ambient electromagnetic energy. The proposed unit structure consists of a centrosymmetric metal closed-ring cross, F4B substrate, and 4 loads connected to the ground through 4 metal vias. The fully centrosymmetric structure keeps the working performances of the proposed metasurface unchanged under different polarization directions. Simulation results show that more than 80% of the energy at 2.45GHz and 5.8GHz can be captured at any incident angle ranging from 0°to 60°, taking into account the slight offset of the resonant frequency (no more than 0.05GHz).
{"title":"Energy Harvesting Metasurface with Polarization-Independent and Wide-Angle-Incident Performances for 2.45GHz and 5.8GHz","authors":"Runze Huang, Beijia Liu, Xinyu Liu, Jinghui Qiu","doi":"10.1109/IWS55252.2022.9977740","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977740","url":null,"abstract":"This paper presents a dual-band and polarization-independent metasurface with wide range of incident angle for harvesting ambient electromagnetic energy. The proposed unit structure consists of a centrosymmetric metal closed-ring cross, F4B substrate, and 4 loads connected to the ground through 4 metal vias. The fully centrosymmetric structure keeps the working performances of the proposed metasurface unchanged under different polarization directions. Simulation results show that more than 80% of the energy at 2.45GHz and 5.8GHz can be captured at any incident angle ranging from 0°to 60°, taking into account the slight offset of the resonant frequency (no more than 0.05GHz).","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116545944","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9978147
Long Wang, Jixin Chen, Debin Hou, Yu Xiang, W. Hong
In this paper, a doubler chain with 13-dBm output power and 35-dBc fundamental rejection is proposed for 5G millimeter-wave application. A bandpass structure is introduced to achieve out-of-band rejection while obtaining a good matching between the doubler and the post-driver. Pre- and post-drivers are deployed in the doubler chain to reduce the power requirement of the local oscillator and obtain high output power at the second harmonic band. The test chip was fabricated in a 0.13-µm SiGe BiCMOS technology with a core size of 0.4 mm2. Measurements show that the doubler chain produces up to 13-dBm out-put power at an input power of 2 dBm. In the frequency band of 28–36 GHz, the fundamental rejection is better than 35 dBc and the third-harmonic rejection is better than 28 dBc.
{"title":"A Doubler Chain with 13-dBm Output Power for 5G Millimeter-Wave Application","authors":"Long Wang, Jixin Chen, Debin Hou, Yu Xiang, W. Hong","doi":"10.1109/IWS55252.2022.9978147","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9978147","url":null,"abstract":"In this paper, a doubler chain with 13-dBm output power and 35-dBc fundamental rejection is proposed for 5G millimeter-wave application. A bandpass structure is introduced to achieve out-of-band rejection while obtaining a good matching between the doubler and the post-driver. Pre- and post-drivers are deployed in the doubler chain to reduce the power requirement of the local oscillator and obtain high output power at the second harmonic band. The test chip was fabricated in a 0.13-µm SiGe BiCMOS technology with a core size of 0.4 mm2. Measurements show that the doubler chain produces up to 13-dBm out-put power at an input power of 2 dBm. In the frequency band of 28–36 GHz, the fundamental rejection is better than 35 dBc and the third-harmonic rejection is better than 28 dBc.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115377822","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9978150
Yan Qu, Jialin Cai
In this paper, a broadband power amplifier (PA) is designed using particle swarm optimization (PSO) algorithm. The Chebyshev low-pass topology is employed to establish initial matching network of the PA. The matching impedance of the network is optimized by the PSO algorithm. The simulation results show that, with the proposed optimization method, excellent impedance matching network can be obtained. The power added efficiency (PAE) can be improved more than 10% averagely, which greater than 70%, and output power improved 1 dBm averagely, which arrived bigger than 41 dBm in the frequency band between 2GHz to 3GHz, which validate the feasibility and effectiveness of the proposed design method.
{"title":"Optimization of Chebyshev Low-pass Topology based Broadband Power Amplifier Using PSO Algorithm","authors":"Yan Qu, Jialin Cai","doi":"10.1109/IWS55252.2022.9978150","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9978150","url":null,"abstract":"In this paper, a broadband power amplifier (PA) is designed using particle swarm optimization (PSO) algorithm. The Chebyshev low-pass topology is employed to establish initial matching network of the PA. The matching impedance of the network is optimized by the PSO algorithm. The simulation results show that, with the proposed optimization method, excellent impedance matching network can be obtained. The power added efficiency (PAE) can be improved more than 10% averagely, which greater than 70%, and output power improved 1 dBm averagely, which arrived bigger than 41 dBm in the frequency band between 2GHz to 3GHz, which validate the feasibility and effectiveness of the proposed design method.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121750588","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977518
Li Yang, Yinqiao Li, Aidong Liu, Song Jin
Multi-beam antennas generally adopt narrow beam coverage, frequency multiplexing and other technologies, which have high requirements for antenna pointing accuracy. For communication satellites in synchronous orbit, a scheme of in orbit pointing calibration of multi-beam antenna is proposed based on the principle of amplitude comparison monopulse. By comparing the amplitudes of the beacon signals, the antenna pointing measurement is realized, the compensation parameters are generated, and the antenna pointing control is realized by adjusting satellite attitude. Based on the analysis of pointing error source and calibration error, the accuracy of calibration is estimated, and the calibration performance is simulated.
{"title":"In orbit pointing calibration scheme and performance simulation of multi-beam antenna","authors":"Li Yang, Yinqiao Li, Aidong Liu, Song Jin","doi":"10.1109/IWS55252.2022.9977518","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977518","url":null,"abstract":"Multi-beam antennas generally adopt narrow beam coverage, frequency multiplexing and other technologies, which have high requirements for antenna pointing accuracy. For communication satellites in synchronous orbit, a scheme of in orbit pointing calibration of multi-beam antenna is proposed based on the principle of amplitude comparison monopulse. By comparing the amplitudes of the beacon signals, the antenna pointing measurement is realized, the compensation parameters are generated, and the antenna pointing control is realized by adjusting satellite attitude. Based on the analysis of pointing error source and calibration error, the accuracy of calibration is estimated, and the calibration performance is simulated.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123798494","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}
Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977452
Yilin Du, Jiangwei Sui, Yi‐Feng Cheng
A dual-band self-decoupled two-element MIMO antenna design based on orthogonal radiation patterns is presented. Through careful tuning of the antenna dimension, the maximum radiation directions of two antennas are adjusted to be orthogonal with each other naturally in both the two bands, resulting in eventual dual-band high isolation. Compared to the traditional dual-band MIMO antennas, the proposed method does not require any external decoupling structure. To validate the proposed method, two pairs of dual-band printed dipole antennas, working in the 3.5 GHz and 4.9 GHz band as well as 3.5 GHz and 5.8 GHz, are designed. The simulated results show that the proposed self-decoupled antennas achieve high isolation of better than 20 dB with matching conditions better than -10 dB.
{"title":"Design of Dual-Band Self-Decoupled MIMO Antennas Based on Orthogonal Patterns","authors":"Yilin Du, Jiangwei Sui, Yi‐Feng Cheng","doi":"10.1109/IWS55252.2022.9977452","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977452","url":null,"abstract":"A dual-band self-decoupled two-element MIMO antenna design based on orthogonal radiation patterns is presented. Through careful tuning of the antenna dimension, the maximum radiation directions of two antennas are adjusted to be orthogonal with each other naturally in both the two bands, resulting in eventual dual-band high isolation. Compared to the traditional dual-band MIMO antennas, the proposed method does not require any external decoupling structure. To validate the proposed method, two pairs of dual-band printed dipole antennas, working in the 3.5 GHz and 4.9 GHz band as well as 3.5 GHz and 5.8 GHz, are designed. The simulated results show that the proposed self-decoupled antennas achieve high isolation of better than 20 dB with matching conditions better than -10 dB.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121705581","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}
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