Pub Date : 2022-08-26DOI: 10.1109/MAPE53743.2022.9935216
Kazuhiko Tamesue, S. Nishi, San Hlaing Myint, Zheng Wen, Toshio Sato, Takuro Sato, T. Kawanishi
This paper presents radio propagation characteristics in a typical indoor space in a 300 GHz Sub-THz broadband channel. We clarified path loss and cross-polarization characteristics in multiple spaces using a linearly polarized horn antenna with 24.6 dBi (E-plane beamwidth 4.5°) and 8.7 dBi (E-plane beamwidth 35°) and a newly developed RHCP circularly polarized patch array antenna which has a gain of 3.4 dBi (E-plane beamwidth 10°) at 300 GHz. We also clarified the effect of shielding by the human body. Furthermore, a comprehensive analysis using ray tracing confirms the accurate agreement of the root mean square delay spread.
{"title":"300GHz Indoor Propagation Measurement, Simulation and Characterization","authors":"Kazuhiko Tamesue, S. Nishi, San Hlaing Myint, Zheng Wen, Toshio Sato, Takuro Sato, T. Kawanishi","doi":"10.1109/MAPE53743.2022.9935216","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935216","url":null,"abstract":"This paper presents radio propagation characteristics in a typical indoor space in a 300 GHz Sub-THz broadband channel. We clarified path loss and cross-polarization characteristics in multiple spaces using a linearly polarized horn antenna with 24.6 dBi (E-plane beamwidth 4.5°) and 8.7 dBi (E-plane beamwidth 35°) and a newly developed RHCP circularly polarized patch array antenna which has a gain of 3.4 dBi (E-plane beamwidth 10°) at 300 GHz. We also clarified the effect of shielding by the human body. Furthermore, a comprehensive analysis using ray tracing confirms the accurate agreement of the root mean square delay spread.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129608334","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 : 2022-08-26DOI: 10.1109/MAPE53743.2022.9935226
Xue Ren, Wenlong He
This paper introduces an X-band circularly polarized isoflux antenna operating at X-band. The antenna structure is quite simple. It is composed of feeding source and specially designed dielectric loaded above for beam shaping. The results show successful isoflux beam radiation. The maximum gain occurs at the 50 degrees away from boresight direction. Additionally, spatial axial-ratio is better than 3 dB within the isolfux beamwidth. The dielectric height is about 0.57 λ0, where λ0 is the wavelength of central frequency. The total structure is compact and performance is good.
{"title":"Investigation of an X-Band Circularly Polarized Isoflux Antenna","authors":"Xue Ren, Wenlong He","doi":"10.1109/MAPE53743.2022.9935226","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935226","url":null,"abstract":"This paper introduces an X-band circularly polarized isoflux antenna operating at X-band. The antenna structure is quite simple. It is composed of feeding source and specially designed dielectric loaded above for beam shaping. The results show successful isoflux beam radiation. The maximum gain occurs at the 50 degrees away from boresight direction. Additionally, spatial axial-ratio is better than 3 dB within the isolfux beamwidth. The dielectric height is about 0.57 λ0, where λ0 is the wavelength of central frequency. The total structure is compact and performance is good.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121410932","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 : 2022-08-26DOI: 10.1109/MAPE53743.2022.9935209
Xiuhe Li, Jinhe Ran, H. Zhang
Synthetic aperture radar (SAR) is an all-weather, high-resolution sensor, but the presence of many kinds of interference in space can affect its mapping and survey capabilities. To address this problem, we propose an innovative network (ISRNet) for SAR interference suppression and recognition. Firstly, the SAR image model is proposed, including the target image, interference image, and background noise image. Secondly, ISRNet is composed of two parts, the interference suppression (IS) part and interference recognition (IR part), where IS part is based on Encoder-Decoder Block (EDB) and Feature Extraction Module (FEM) as the main framework to suppress interference. After that, we propose a novel interference recognition strategy: IR part to directly recognize the interference image to increase the recognition accuracy. Four types of interference data are adopted to verify the capability of ISRNet, and the results show that ISRNet has good suppression performance and high accuracy of interference recognition.
{"title":"ISRNet: An Effective Network for SAR Interference Suppression and Recognition","authors":"Xiuhe Li, Jinhe Ran, H. Zhang","doi":"10.1109/MAPE53743.2022.9935209","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935209","url":null,"abstract":"Synthetic aperture radar (SAR) is an all-weather, high-resolution sensor, but the presence of many kinds of interference in space can affect its mapping and survey capabilities. To address this problem, we propose an innovative network (ISRNet) for SAR interference suppression and recognition. Firstly, the SAR image model is proposed, including the target image, interference image, and background noise image. Secondly, ISRNet is composed of two parts, the interference suppression (IS) part and interference recognition (IR part), where IS part is based on Encoder-Decoder Block (EDB) and Feature Extraction Module (FEM) as the main framework to suppress interference. After that, we propose a novel interference recognition strategy: IR part to directly recognize the interference image to increase the recognition accuracy. Four types of interference data are adopted to verify the capability of ISRNet, and the results show that ISRNet has good suppression performance and high accuracy of interference recognition.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126279087","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 : 2022-08-26DOI: 10.1109/MAPE53743.2022.9935205
Wen Wang, Lu Sun, Haoming Liu, Yibo Feng
In the Fifth Generation (5G) communication system, power amplifiers (PAs) have serious nonlinear distortion and memory effect. For this reason, this paper proposes a neural network model to linearize PAs. Common PA models such as the long short-term memory (LSTM) network and the deep neural network (DNN) have high complexity problems. Therefore, this paper proposes a behavioral model consisting of LSTM and one dimensional convolutional neural network (1D-CNN), namely LSTM-CNN, for PAs. The LSTM layer is proposed to extract time series information of the input signal to simulate the memory effect of the PA and 1D-CNN structure is used to model the nonlinear characteristics of the PA and reduce model complexity. In addition, the predistortion structure of the PA inverse model based on iteration is used to implement linearization. Finally, modeling results of the class F-PA with the proposed LSTM-CNN show that normalized mean square error (NMSE) can reach about −45 dB. Digital predistortion (DPD) results show that the adjacent channel power ratio (ACPR) can be improved by 14 dB.
{"title":"LSTM-CNN for Behavioral Modeling and Predistortion of 5G Power Amplifiers","authors":"Wen Wang, Lu Sun, Haoming Liu, Yibo Feng","doi":"10.1109/MAPE53743.2022.9935205","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935205","url":null,"abstract":"In the Fifth Generation (5G) communication system, power amplifiers (PAs) have serious nonlinear distortion and memory effect. For this reason, this paper proposes a neural network model to linearize PAs. Common PA models such as the long short-term memory (LSTM) network and the deep neural network (DNN) have high complexity problems. Therefore, this paper proposes a behavioral model consisting of LSTM and one dimensional convolutional neural network (1D-CNN), namely LSTM-CNN, for PAs. The LSTM layer is proposed to extract time series information of the input signal to simulate the memory effect of the PA and 1D-CNN structure is used to model the nonlinear characteristics of the PA and reduce model complexity. In addition, the predistortion structure of the PA inverse model based on iteration is used to implement linearization. Finally, modeling results of the class F-PA with the proposed LSTM-CNN show that normalized mean square error (NMSE) can reach about −45 dB. Digital predistortion (DPD) results show that the adjacent channel power ratio (ACPR) can be improved by 14 dB.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125788747","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 : 2022-08-26DOI: 10.1109/MAPE53743.2022.9935237
Zhijia Liu, Fan Lu, Y. Zhang, Zhenxing Wang, Zhiyi Mao, F. Li, Yuhan Huang
A K/Ka band dual band high gain horn antenna with shaped beam for HEO satellite has been developed for K/Ka band TT&C. The horn geometry uses both horizontal and vertical corrugations liner control profile with dual-depth vertical corrugations. The geometry of the horn is optimized to have maximum Edge of Coverage (EoC) within ±16° at all frequencies of interest. The measured results show that the EoC gain is more than 12.9 dBi and 13.1 dBi in EoC region at both K and Ka band respectively. The antenna has broad application prospects in HEO satellite.
{"title":"K/Ka Band High Gain Antenna with Shaped Beam for HEO Satellite","authors":"Zhijia Liu, Fan Lu, Y. Zhang, Zhenxing Wang, Zhiyi Mao, F. Li, Yuhan Huang","doi":"10.1109/MAPE53743.2022.9935237","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935237","url":null,"abstract":"A K/Ka band dual band high gain horn antenna with shaped beam for HEO satellite has been developed for K/Ka band TT&C. The horn geometry uses both horizontal and vertical corrugations liner control profile with dual-depth vertical corrugations. The geometry of the horn is optimized to have maximum Edge of Coverage (EoC) within ±16° at all frequencies of interest. The measured results show that the EoC gain is more than 12.9 dBi and 13.1 dBi in EoC region at both K and Ka band respectively. The antenna has broad application prospects in HEO satellite.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128183060","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}
In the design of ordinary unmanned aerial vehicle (UAV) systems, in order to save costs, the antennas mostly use shelf products sold by Taobao merchants. In response to this phenomenon, this paper studies the consistency of shelf antennas, the characteristics of antenna’s connectors and coaxial cables, as well as the performance of typical printed circuit board (PCB) antennas, flexible printed circuit (FPC) antennas, and copper tube antennas, and compares the antenna characteristics for different mounting materials.
{"title":"Research on Shelf Antennas for UAV Application","authors":"Guiyuan Li, Yu Wang, Jinfeng Xie, Hongtian Zhang, Chengcheng Xie, X. Song","doi":"10.1109/MAPE53743.2022.9935203","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935203","url":null,"abstract":"In the design of ordinary unmanned aerial vehicle (UAV) systems, in order to save costs, the antennas mostly use shelf products sold by Taobao merchants. In response to this phenomenon, this paper studies the consistency of shelf antennas, the characteristics of antenna’s connectors and coaxial cables, as well as the performance of typical printed circuit board (PCB) antennas, flexible printed circuit (FPC) antennas, and copper tube antennas, and compares the antenna characteristics for different mounting materials.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134242682","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 : 2022-08-26DOI: 10.1109/MAPE53743.2022.9935189
Jia-nan Wu, D. Xiong, Jun Ding
In this work, the design of a triband circularly polarized antenna which consists of a stacked patch antenna array and a wideband quadrature four-port feed network is reported. Using a grounded shunt λg/4 stub in the main line of a conventional phase shifter, four signals with equal amplitude and orthogonal phase of 0°, 90°, 180°, and 270° can be achieved in a frequency bandwidth greater than 67% from 5 to 10 GHz. Benefiting from stacked microstrip patches and the sequentially rotated feed layout, the proposed antenna exhibits a low profile and symmetrical unidirectional radiation beam. The overall electrical size of the antenna is $1.6 times 1.4 times 0.06;{lambda _0}^3$ (λ0 is the free space wavelength at 6.0 GHz). In addition, the antenna features the same circular polarization status at three bands, the 3 dB axial ratio bandwidths are 15.2% (5.4-6.2 GHz), 11.4% (6.7-7.4 GHz), 15.3% (7.7-9.0 GHz), and the forward peak gains are 8.3, 9.8, 6.3 dBic at 6, 7, and 8.5 GHz, respectively.
{"title":"Triband Circularly Polarized Unidirectional Stacked Patch Array Antenna Enabled by Broadband Feed Network","authors":"Jia-nan Wu, D. Xiong, Jun Ding","doi":"10.1109/MAPE53743.2022.9935189","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935189","url":null,"abstract":"In this work, the design of a triband circularly polarized antenna which consists of a stacked patch antenna array and a wideband quadrature four-port feed network is reported. Using a grounded shunt λg/4 stub in the main line of a conventional phase shifter, four signals with equal amplitude and orthogonal phase of 0°, 90°, 180°, and 270° can be achieved in a frequency bandwidth greater than 67% from 5 to 10 GHz. Benefiting from stacked microstrip patches and the sequentially rotated feed layout, the proposed antenna exhibits a low profile and symmetrical unidirectional radiation beam. The overall electrical size of the antenna is $1.6 times 1.4 times 0.06;{lambda _0}^3$ (λ0 is the free space wavelength at 6.0 GHz). In addition, the antenna features the same circular polarization status at three bands, the 3 dB axial ratio bandwidths are 15.2% (5.4-6.2 GHz), 11.4% (6.7-7.4 GHz), 15.3% (7.7-9.0 GHz), and the forward peak gains are 8.3, 9.8, 6.3 dBic at 6, 7, and 8.5 GHz, respectively.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115276573","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 : 2022-08-26DOI: 10.1109/MAPE53743.2022.9935156
Lidan Fang, Yan Li, Erping Li
This paper presents a complete equivalent circuit model of a large memristor crossbar array, including parasitic capacitance, inductance, and resistance. By changing the rise time of the input signal and monitoring the output voltage of different output ports, signal integrity (SI) problems such as crosstalk, and IR voltage drop in the memristor crossbar array are analyzed. The simulation results show that with the decrease of the rise time, the electromagnetic effect will become obvious, which will lead to the crosstalk ripple and distortion of the output signal becoming serious. And as the output port moves away from the input, the IR voltage drop increases with the increase of the coupling elements. This will point the direction for improving the performance of memristor crossbar arrays. Furthermore, different from conventional signals, we propose to simulate spiking signals using the Izhikevich neuron model for more accurate analysis.
{"title":"Modeling and Analysis of a Large-Scale Memristor Crossbar Array for Neuromorphic Chip","authors":"Lidan Fang, Yan Li, Erping Li","doi":"10.1109/MAPE53743.2022.9935156","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935156","url":null,"abstract":"This paper presents a complete equivalent circuit model of a large memristor crossbar array, including parasitic capacitance, inductance, and resistance. By changing the rise time of the input signal and monitoring the output voltage of different output ports, signal integrity (SI) problems such as crosstalk, and IR voltage drop in the memristor crossbar array are analyzed. The simulation results show that with the decrease of the rise time, the electromagnetic effect will become obvious, which will lead to the crosstalk ripple and distortion of the output signal becoming serious. And as the output port moves away from the input, the IR voltage drop increases with the increase of the coupling elements. This will point the direction for improving the performance of memristor crossbar arrays. Furthermore, different from conventional signals, we propose to simulate spiking signals using the Izhikevich neuron model for more accurate analysis.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115458364","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}
In this paper, the discharge phenomena of aluminum materials under the action of strong electromagnetic waves are investigated. The electron multiplication phenomenon of aluminum surface under different amplitude of microwave at 1GHz-300GHz was calculated using 1D3V simulation framework. It shows that the easiest discharge interval of aluminum is about 0.05MV/m-8.5MV/m at 1GHz and about 20MV/m-1700MV/m at 300GHz, and the easiest discharge interval increases with the frequency and follows nearly a linear power law.
{"title":"The Law of Secondary Electron Multiplication of Aluminum under Different Frequency Microwaves","authors":"Shengfei Shang, Xiaoning Yang, Yong Yang, Yan-Qiang Bi, Nankai Wu, Xi-Yuan Li","doi":"10.1109/MAPE53743.2022.9935218","DOIUrl":"https://doi.org/10.1109/MAPE53743.2022.9935218","url":null,"abstract":"In this paper, the discharge phenomena of aluminum materials under the action of strong electromagnetic waves are investigated. The electron multiplication phenomenon of aluminum surface under different amplitude of microwave at 1GHz-300GHz was calculated using 1D3V simulation framework. It shows that the easiest discharge interval of aluminum is about 0.05MV/m-8.5MV/m at 1GHz and about 20MV/m-1700MV/m at 300GHz, and the easiest discharge interval increases with the frequency and follows nearly a linear power law.","PeriodicalId":442568,"journal":{"name":"2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123442884","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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