This paper presents a design of 23-34 GHz wideband low-noise amplifier (LNA) based on gallium-nitride (GaN) technology. The LNA circuit employs an input matching network with few components and particularly reduces the noise of the second stage at the high frequency, which makes the circuit achieve sub-1dB noise performance in the whole bandwidth, while completing noise and impedance matching. Because inductive peaking technique and stagger tuning technique are adopted, the small-signal gain of the LNA is from 22.1 dB to 25.2 dB over the whole bandwidth. With 30.9 dBm maximum output-referred third-order intercept point (OIP3) and 42 dBm maximum input power (Pin,max), the LNA also achieves high linearity and high reliability.
{"title":"A 23-34 GHz Wideband GaN Low-Noise Amplifier for 5G Millimeter-Wave Applications","authors":"Yubin Li, Xueying Wu, Jun Hu, Xiuyin Zhang, Yun Yin, Hongtao Xu","doi":"10.1109/iwem53379.2021.9790567","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790567","url":null,"abstract":"This paper presents a design of 23-34 GHz wideband low-noise amplifier (LNA) based on gallium-nitride (GaN) technology. The LNA circuit employs an input matching network with few components and particularly reduces the noise of the second stage at the high frequency, which makes the circuit achieve sub-1dB noise performance in the whole bandwidth, while completing noise and impedance matching. Because inductive peaking technique and stagger tuning technique are adopted, the small-signal gain of the LNA is from 22.1 dB to 25.2 dB over the whole bandwidth. With 30.9 dBm maximum output-referred third-order intercept point (OIP3) and 42 dBm maximum input power (Pin,max), the LNA also achieves high linearity and high reliability.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128553756","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 : 2021-11-28DOI: 10.1109/iwem53379.2021.9790647
Junyi Shen, S. Liao, W. Che, Q. Xue
This paper presents a low radar cross-section (RCS) dual-band dual-polarized antenna designed based on absorptive frequency-selective reflector (AFSR). The AFSR is composed of a dual-band dual-polarized bandstop frequency selective structure (FSS) and an absorber under the FSS. The bandstop FSS element is designed using cross-frame and square ring to realize dual-band dual-polarized operation. The reflection frequency band of AFSR coincides with the operation band of the antenna. The simulation results indicate that the AFSR-backed antenna system has a remarkable reduction of out-of-band RCS and relatively consistent radiation performance compared with the PEC-backed antenna.
{"title":"A Low-RCS Dual-band Dual-polarized Antenna Based on Absorptive Frequency-Selective Reflector","authors":"Junyi Shen, S. Liao, W. Che, Q. Xue","doi":"10.1109/iwem53379.2021.9790647","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790647","url":null,"abstract":"This paper presents a low radar cross-section (RCS) dual-band dual-polarized antenna designed based on absorptive frequency-selective reflector (AFSR). The AFSR is composed of a dual-band dual-polarized bandstop frequency selective structure (FSS) and an absorber under the FSS. The bandstop FSS element is designed using cross-frame and square ring to realize dual-band dual-polarized operation. The reflection frequency band of AFSR coincides with the operation band of the antenna. The simulation results indicate that the AFSR-backed antenna system has a remarkable reduction of out-of-band RCS and relatively consistent radiation performance compared with the PEC-backed antenna.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129817679","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 : 2021-11-28DOI: 10.1109/iWEM53379.2021.9790693
Balin Ye, Kunpeng Yuan, Dongxu Jiang, Enkai Liu
In this paper, a time-varying model of rolling waves is established for broken waves, the electromagnetic backscattering coefficients of rolling waves are calculated, and the difference in monostatic electromagnetic scattering in different periods of the formation of rolling waves is discussed. The research is of great significance for electronic reconnaissance to identify and sort sea targets more effectively.
{"title":"Research on Monostatic Electromagnetic Scattering of Rolling Waves","authors":"Balin Ye, Kunpeng Yuan, Dongxu Jiang, Enkai Liu","doi":"10.1109/iWEM53379.2021.9790693","DOIUrl":"https://doi.org/10.1109/iWEM53379.2021.9790693","url":null,"abstract":"In this paper, a time-varying model of rolling waves is established for broken waves, the electromagnetic backscattering coefficients of rolling waves are calculated, and the difference in monostatic electromagnetic scattering in different periods of the formation of rolling waves is discussed. The research is of great significance for electronic reconnaissance to identify and sort sea targets more effectively.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"volume1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129854286","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 : 2021-11-28DOI: 10.1109/iwem53379.2021.9790408
Sun Ruofei
This paper presented a design method of active Butterworth high-pass filter (HPF) with flat pass-band gain. This method, based on the transformation of domain surfaces, used correspondence in Butterworth filter’s denominator polynomials and the response function of Sallen-Key circuit to derive the formulas of Sallen Key HPF expressed by Butterworth filter’s quality factor Qi, it was verified by LTspice software simulation. The paper gave a 6th active high-pass filter whose corner frequency was 100Hz, gain of 4.5dB in pass-band and stop-band attenuation -30db @50Hz. The simulation result was agreed with requirements well, the method and formulas of Butterworth active HPF are reasonable.
{"title":"A Design Method of Active High-Pass Butter-worth Filter","authors":"Sun Ruofei","doi":"10.1109/iwem53379.2021.9790408","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790408","url":null,"abstract":"This paper presented a design method of active Butterworth high-pass filter (HPF) with flat pass-band gain. This method, based on the transformation of domain surfaces, used correspondence in Butterworth filter’s denominator polynomials and the response function of Sallen-Key circuit to derive the formulas of Sallen Key HPF expressed by Butterworth filter’s quality factor Qi, it was verified by LTspice software simulation. The paper gave a 6th active high-pass filter whose corner frequency was 100Hz, gain of 4.5dB in pass-band and stop-band attenuation -30db @50Hz. The simulation result was agreed with requirements well, the method and formulas of Butterworth active HPF are reasonable.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127776070","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 : 2021-11-28DOI: 10.1109/iwem53379.2021.9790531
Kaiyu Wang, Shining Sun, Hanyu Xie, Bian Wu
A low-profile filtering antenna with a wide stopband based on substrate integrated waveguide (SIW) is presented in this article. First, a five-pole bandpass filter using a cul-de-sac topology scheme with two finite-transmission zeros (FTZs) is proposed. The SIW filter which consists of three single-mode cavities using TE101 mode and a dual-mode cavity using TE201 and TE103 mode achieves a wide stopband due to the suppression of TE102, TE202, and TE104 mode. Then a cavity-backed slot antenna is designed so that its bandwidth is narrower than that of the filter, thus making it behave as a last-order resonator. With a center frequency of 10 GHz and a fractional bandwidth of 4.03%, the antenna has good stopband performance and achieves a gain of 7.8 dB in terms of a flat gain profile.
{"title":"Low-Profile Filtering Antenna With Wide Stopband Using Dual-Mode Rectangular SIW Cavities","authors":"Kaiyu Wang, Shining Sun, Hanyu Xie, Bian Wu","doi":"10.1109/iwem53379.2021.9790531","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790531","url":null,"abstract":"A low-profile filtering antenna with a wide stopband based on substrate integrated waveguide (SIW) is presented in this article. First, a five-pole bandpass filter using a cul-de-sac topology scheme with two finite-transmission zeros (FTZs) is proposed. The SIW filter which consists of three single-mode cavities using TE101 mode and a dual-mode cavity using TE201 and TE103 mode achieves a wide stopband due to the suppression of TE102, TE202, and TE104 mode. Then a cavity-backed slot antenna is designed so that its bandwidth is narrower than that of the filter, thus making it behave as a last-order resonator. With a center frequency of 10 GHz and a fractional bandwidth of 4.03%, the antenna has good stopband performance and achieves a gain of 7.8 dB in terms of a flat gain profile.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128730837","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 : 2021-11-28DOI: 10.1109/iwem53379.2021.9790458
J. Xiao, Xiangling Liu, Xiao-Fang Li
In this report, a multi-layer suspended SCPW MIMO filternna with adjustable gain zeros on both sides of the passband is proposed, which works at 5.21GHz with an isolation of no less than 25.3dB, a return loss of no less than 15dB, a gain of 2.8dBi, and an envelope correlation coefficient of 0.002, these performance have been demonstrated by simulation and some experimental results. Surface waves and space waves can be suppressed by the proposed suspended coplanar waveguide structure and copper separating wall, respectively.
{"title":"Four-port MIMO Filtenna Based on Multi-layer Suspended Coplanar Waveguide","authors":"J. Xiao, Xiangling Liu, Xiao-Fang Li","doi":"10.1109/iwem53379.2021.9790458","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790458","url":null,"abstract":"In this report, a multi-layer suspended SCPW MIMO filternna with adjustable gain zeros on both sides of the passband is proposed, which works at 5.21GHz with an isolation of no less than 25.3dB, a return loss of no less than 15dB, a gain of 2.8dBi, and an envelope correlation coefficient of 0.002, these performance have been demonstrated by simulation and some experimental results. Surface waves and space waves can be suppressed by the proposed suspended coplanar waveguide structure and copper separating wall, respectively.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127484105","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 : 2021-11-28DOI: 10.1109/iwem53379.2021.9790649
Dongliang Zhang, Qi Wu
A dual-band microstrip patch antenna is proposed. The fractional bandwidths for the two bands are 2% and 4%, respectively. The antenna is evolved from a circular patch antenna. Two groups of concentrical conductive vias are used to generate new resonances and increase the resonance depth. Several key parameters of the antenna are studied, which shows that the proposed method is a general solution suitable to make the proposed antenna works in different frequency bands.
{"title":"A Dual-band Low-profile Circular Patch Antenna","authors":"Dongliang Zhang, Qi Wu","doi":"10.1109/iwem53379.2021.9790649","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790649","url":null,"abstract":"A dual-band microstrip patch antenna is proposed. The fractional bandwidths for the two bands are 2% and 4%, respectively. The antenna is evolved from a circular patch antenna. Two groups of concentrical conductive vias are used to generate new resonances and increase the resonance depth. Several key parameters of the antenna are studied, which shows that the proposed method is a general solution suitable to make the proposed antenna works in different frequency bands.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127259309","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 : 2021-11-28DOI: 10.1109/iWEM53379.2021.9790482
Z. X. Yang, W. Chan, L. H. Zhou, X. Zhou
This paper introduces an analytical design method for the generalized Class-E power amplifier (PA) with shunt filter at any duty ratio. The idealized switch waveforms are derived first, and then the optimal parameter values of load network are obtained, and three important indicators the peak switch drain voltage, power output capability and maximum operating frequency at different sets of values are also investigated. To verify the effectiveness of the design method, a simulation experiment is demonstrated showing waveforms matching well with theory.
{"title":"Generalized Class-E Power Amplifier with Shunt Filter at Any Duty Ratio","authors":"Z. X. Yang, W. Chan, L. H. Zhou, X. Zhou","doi":"10.1109/iWEM53379.2021.9790482","DOIUrl":"https://doi.org/10.1109/iWEM53379.2021.9790482","url":null,"abstract":"This paper introduces an analytical design method for the generalized Class-E power amplifier (PA) with shunt filter at any duty ratio. The idealized switch waveforms are derived first, and then the optimal parameter values of load network are obtained, and three important indicators the peak switch drain voltage, power output capability and maximum operating frequency at different sets of values are also investigated. To verify the effectiveness of the design method, a simulation experiment is demonstrated showing waveforms matching well with theory.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127388164","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 : 2021-11-28DOI: 10.1109/iwem53379.2021.9790696
Li Yuanhao, Xie Shuguo, Chen Yishu
In order to predict the conduction emission performance of a circuit board, manufacturers need to provide the electromagnetic compatibility (EMC) model of the chip to users. The Integrated circuit emission model-conducted emissions (ICEM-CE) modelling method proposed in standard IEC62433-2 can target various active chips, but lacks specificity for chips with typical characteristics of electromagnetic compatibility. In this paper, we propose a parametric model construction method for microcontroller units (MCUs). By studying the characteristics of the internal activity (IA) of the MCUs, the universal prior information for MCUs is obtained, and the parameterized model is constructed.
{"title":"A New Methodology to Build the ICEM-CE Model for Microcontroller Units","authors":"Li Yuanhao, Xie Shuguo, Chen Yishu","doi":"10.1109/iwem53379.2021.9790696","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790696","url":null,"abstract":"In order to predict the conduction emission performance of a circuit board, manufacturers need to provide the electromagnetic compatibility (EMC) model of the chip to users. The Integrated circuit emission model-conducted emissions (ICEM-CE) modelling method proposed in standard IEC62433-2 can target various active chips, but lacks specificity for chips with typical characteristics of electromagnetic compatibility. In this paper, we propose a parametric model construction method for microcontroller units (MCUs). By studying the characteristics of the internal activity (IA) of the MCUs, the universal prior information for MCUs is obtained, and the parameterized model is constructed.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114351439","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 : 2021-11-28DOI: 10.1109/iwem53379.2021.9790429
Jing-Ying Weng, Xiaojun Bi
This paper proposes an ultra-wideband RF feedback loop including high energy-efficiency invertor structures, which is tailored for silicon-based optoelectronic oscillator (OEO). The proposed RF feedback loop is composed of a wideband transimpedance amplifier, an analog phase shifter and a driver amplifier, which can provide required gain and phase of OEO. The loop achieves a trans-impedance gain of over 75 dBΩ, a tunable phase shift of 360°, an output swing of 0.5-4.5 V and a power consumption of only 143 mW. Furthermore, based on the proposed RF feedback loop, the OEO with a frequency tuning range of 4 GHz to 12 GHz is realized.
{"title":"A Wideband RF Feedback Loop including High Energy-Efficiency Invertor Structures for Silicon-based Optoelectronic Oscillator","authors":"Jing-Ying Weng, Xiaojun Bi","doi":"10.1109/iwem53379.2021.9790429","DOIUrl":"https://doi.org/10.1109/iwem53379.2021.9790429","url":null,"abstract":"This paper proposes an ultra-wideband RF feedback loop including high energy-efficiency invertor structures, which is tailored for silicon-based optoelectronic oscillator (OEO). The proposed RF feedback loop is composed of a wideband transimpedance amplifier, an analog phase shifter and a driver amplifier, which can provide required gain and phase of OEO. The loop achieves a trans-impedance gain of over 75 dBΩ, a tunable phase shift of 360°, an output swing of 0.5-4.5 V and a power consumption of only 143 mW. Furthermore, based on the proposed RF feedback loop, the OEO with a frequency tuning range of 4 GHz to 12 GHz is realized.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122734684","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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