Bo Zhang, Lin Shao, Zhuang Xu, Chao Yu, Jianfeng Zhai
{"title":"Comparison of Digital Predistortion of GaN Power Amplifiers with Trapping Effects Under Different Bandwidth Signals","authors":"Bo Zhang, Lin Shao, Zhuang Xu, Chao Yu, Jianfeng Zhai","doi":"10.1109/IWS58240.2023.10222859","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10222859","url":null,"abstract":"The degeneration of the power amplifiers (PA) with trapping effects under different type signals is investigated in this paper. A compensation model is built to compensate the trapping effects of the PA,. The experimental result shows that the stronger fluctuation of the trap state, the deeper trapping effects degeneration on the PA performance when a GaN Doherty is excited by signals with the discontinuous power level.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128902815","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}
Zhi-Yi Zhang, Liang-Feng Qiu, Linsheng Wu, Jun-Fa Mao
{"title":"A Continuously Tunable Wilkinson Power Divider with a Flat Division Ratio","authors":"Zhi-Yi Zhang, Liang-Feng Qiu, Linsheng Wu, Jun-Fa Mao","doi":"10.1109/IWS58240.2023.10222464","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10222464","url":null,"abstract":"In this paper, a Wilkinson power divider with flat and continuously tunable division ratio is presented. A pair of adjustable networks are utilized to achieve a flat division ratio and good matching performance within a specific frequency range. Each network consists of two varactor diodes and three segments of transmission lines, which is equivalent to a quarter-wavelength transmission line with tunable characteristic impedance. By adjusting the capacitance of the varactor diodes, the equivalent electrical length of the network can be maintained at 90 degrees while its equivalent characteristic impedance is varied. For verification, a proposed power divider with a continuously tunable range of 3.2-5.8dB is designed and fabricated.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133728164","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":"A Discontinuous Galerkin Multiregion Integral Equation for Multiscale Antenna Analysis","authors":"Ze-Lin Li, Biyi Wu, X. Sheng","doi":"10.1109/IWS58240.2023.10221978","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10221978","url":null,"abstract":"Aiming at the efficient radiation simulation of anten-nas with dielectric slabs and spatial multiscale features, a discon-tinuous Galerkin (DG) scheme for the multi-region surface inte-gral equation is presented in this letter. Boundary lines between different materials can be handled independently without merging and reducing unknowns at the junction, which simplifies the cal-culation. Numerical experiments of different kinds of antennas are carried out to verify the accuracy and efficiency of the proposed method through comparisons.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115443377","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":"A DC~67 GHz Memristive RF Switch Based on Conductive-Bridging RAM on High-Resistivity Silicon Substrate","authors":"Zong-Rui Xu, Yi-Feng Ye, Linsheng Wu, Jun-Fa Mao","doi":"10.1109/IWS58240.2023.10222107","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10222107","url":null,"abstract":"A RF switch based on the conductive bridge random access memory (CBRAM) technique is proposed and fabricated on a high-resistivity silicon (HRS) substrate. The CBRAM-based switch can maintain its ON/OFF state without a continuous biasing, leading to ultralow power consumption potentially. Experimental and equivalent circuit results show the switch provides a relatively low ON-state insertion loss of less than 1.2 dB up to 67 GHz. The OFF-state isolation is over 10 dB. The retention and switching characteristics of the proposed memristive switch are tested. It is demonstrated that the baking process at 125°C has small impact on the ON/OFF-state resistances and the device can still be switched under the high temperature of 85°C.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115472991","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":"Liquid Metal-Based Linear Self-Complementary Phase Shifter for Phased Array Antenna","authors":"Yi-Wen Wu, Yi Wang","doi":"10.1109/IWS58240.2023.10221955","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10221955","url":null,"abstract":"This paper proposes a liquid metal (LM)-based linear tunable phase shifter. A via-pad-slot (VPS) structure is realized by using a slot to isolate a via from the ground. The shunt inductance and capacitance are loaded on the HMSIW when the VPS structure is inserted in the HMSIW. While the capacitance will be removed when the square slot is filled by LM. The shunt inductance and capacitance have complementary phase effect which causes a small phase deviation with frequency. According to the proposed VPS structure, a X-band linear tunable HMSIW phase shifter range is 0-100° when the slots are sequentially filled by LM. The measured insertion loss (IL) is 0.85 dB, the phase shift ranges from 0 to 100° within 9.5-13 GHz (31.11%), and the average phase resolution is about 1.79°. The phase shifter offers benefits such as low insertion loss, high resolution, linear phase adjustment, and negligible phase deviation, which is attractive to passive phased array antenna design","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114453849","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}
Chang-Sheng Sun, Xiaochun Li, Hai-Bing Zhang, Jun-Fa Mao
{"title":"A Low-Cost Hollow Rectangular Dielectric Waveguide","authors":"Chang-Sheng Sun, Xiaochun Li, Hai-Bing Zhang, Jun-Fa Mao","doi":"10.1109/IWS58240.2023.10222503","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10222503","url":null,"abstract":"A low-loss hollow rectangular dielectric waveguide (HRDW) is proposed and investigated for sub-terahertz (sub- THz) applications. It is a longitudinally homogeneous three-layer structure constructed by the same material, with a hollow core in the middle. It supports monomode $E_{11}^{y}$ over 220–280 GHz. Hollow structure can significantly reduce the material absorption loss. The proposed waveguide is designed under PCB technology. The simulated results show that the average attenuation constant of the HRDW is 0.017 dB/mm in the designated band, which is reduced by 55% compared with the narrowed dielectric microstrip line (N-DML). The proposed dielectric waveguide can be used for sub-THz application due to the advantage of low loss, simple structure and easy fabrication.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114935628","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":"A 26-GHz CMOS Power Amplifier with Sea-of-Gates Transistor Layout and Systematic Modeling Techniques","authors":"Peigen Yu, Dixian Zhao","doi":"10.1109/IWS58240.2023.10223147","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10223147","url":null,"abstract":"A 26-GHz CMOS power amplifier is designed with sea-of-gates transistor layout to improve matching for phased array applications. A systematic modeling technique is proposed and verified to develop the hybrid model for high-frequency simulations. The power amplifier achieves a peak gain of 20 dB with a 9.2-GHz −3-dB bandwidth. At 26 GHz, it can offer a saturated output power of 13 dBm with a peak power added efficiency of 27%. The measured and simulated results are in good agreement.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116978887","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":"A 60GHz 6-bit Digital-Step Attenuator with Low Phase Variations and Amplitude in 40-nm CMOS Technology","authors":"Shida Yan, Jie Cui, Weixing Sheng","doi":"10.1109/IWS58240.2023.10222536","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10222536","url":null,"abstract":"This paper designs a 6-bit digital attenuator that operates at 60GHz millimeter wave based on the TSMC 40nm CMOS process. The attenuation range is 0-31.5dB with a step of 0.5dB. The attenuator is composed of cascaded bridge- T,pi and improved- T structures, and an inductive compensation struc-ture is added to reduce additional phase shift. Interstage matching is designed to reduce the load effect between stages. By rea-sonably selecting the parameter model and topology, optimizing the layout design, the circuit performance is achieved and the simulation results are as follows: Within the range of 26-64GHz, RMS attenuation error <0.5dB, RMS additional phase shift <2.7°, insertion loss at 60GHz is 6.75dB, attenuation error is 0.15dB, 1dB gain compression point is 11.54dBm.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"9 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120858378","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":"Design of Bandstop Frequency-Selective Structure Based on Corrugated Structure","authors":"Yunlong Wu, Da Li, Yudi Fan, Di Gao, Erping Li","doi":"10.1109/IWS58240.2023.10223116","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10223116","url":null,"abstract":"In this paper, we propose a novel design of bandstop frequency-selective structure with ultra-wide stopband based on corrugated structure. The proposed three-dimensional (3-D) structure is a periodic structure composed of narrow metal strip lines printed on regular triangular prisms. The effects of structural parameters on stopband performance are investigated. The simulation results show that the -10 dB fractional bandwidth (FBW) of stopband is 80%, and the angular stability of the structural response is up to 60 degrees for both TE and TM polarization. Moreover, the period of the corrugated structure is 0.2λ, and the thickness along the wave propagation is 0.26λ.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125042122","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":"Design of a Multi-Octave PA Using a Double Optimization Methodology","authors":"Hongbo Zhang, Jialin Cai","doi":"10.1109/IWS58240.2023.10222531","DOIUrl":"https://doi.org/10.1109/IWS58240.2023.10222531","url":null,"abstract":"In this work, a double optimization algorithm is used to design a multi-octave power amplifier (PA). The initial PA is de-signed based on Chebyshev low-pass topology. The advanced de-sign system (ADS) embedded optimization technique is used to ob-tain a good starting point for Bayesian optimization (BO), and then BO method is carried out to further optimize the performance of the designed PA. Finally, a multi-octave PA with the output power of more than 40 dBm and power added efficiency (PAE) of better than 60% in the band of 0.7-3.1 GHz is obtained.","PeriodicalId":219295,"journal":{"name":"2023 IEEE MTT-S International Wireless Symposium (IWS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128316353","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}