Pub Date : 2022-08-12DOI: 10.1109/IWS55252.2022.9977943
Haizhuo He, Hongjun Chu, Rui Pan, Linting Ye, Kang Zhang, Weichu Chen, Peng Zhang, Shengchang Lan
Sign language, as the main means of communication used by hearing-impaired people, is an indispensable part for them to better integrate into a harmonious society. At the same time, the all-round development of today's society urgently needs to build a bridge for the hearing impaired to communicate with the society, create a barrier-free environment, and increase the degree of socialization of the hearing impaired. All these factors promote the demand for direct human-computer interaction in sign language. This paper aims to explore the electromagnetic representation and interpretation of sign language semantics, hoping to provide a new way to improve the level of human-computer interaction and care for the hearing impaired.
{"title":"Overview of Electromagnetic Representation and Interpretation of Sign Language Semantics","authors":"Haizhuo He, Hongjun Chu, Rui Pan, Linting Ye, Kang Zhang, Weichu Chen, Peng Zhang, Shengchang Lan","doi":"10.1109/IWS55252.2022.9977943","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977943","url":null,"abstract":"Sign language, as the main means of communication used by hearing-impaired people, is an indispensable part for them to better integrate into a harmonious society. At the same time, the all-round development of today's society urgently needs to build a bridge for the hearing impaired to communicate with the society, create a barrier-free environment, and increase the degree of socialization of the hearing impaired. All these factors promote the demand for direct human-computer interaction in sign language. This paper aims to explore the electromagnetic representation and interpretation of sign language semantics, hoping to provide a new way to improve the level of human-computer interaction and care for the hearing impaired.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"1 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":"130761558","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/IWS55252.2022.9977587
Jingyuan Zhang, Xu Yan, Haorui Luo, Yongxin Guo
This paper reports on a Ku-band high-power amplifier (HPA) monolithic microwave integrated circuit (MMIC) on 150-nm GaN-SiC high electron mobility transistor (HEMT) process, which exhibits high output power (13 W Psat) and high efficiency (45 % peak PAE) under pulse simulation with 100 $mumathrm{s}$ period and 10 % duty cycle. By employing wideband matching networks (MNs), the proposed HPA achieves 39.2 ‘” 41.2 dBm Pout and 35.7% ~ 45.4% PAE from 14.0 to 18.0 GHz. Power gain exceeds 17 dB in the operating band. The HPA chip dimensions are 2.55 mm by 1.3 mm. These results provide the potential for this HP A to be applied in satellite communications (SATCOM).
{"title":"High Efficiency Ku-Band 13 W GaN HEMT HPA","authors":"Jingyuan Zhang, Xu Yan, Haorui Luo, Yongxin Guo","doi":"10.1109/IWS55252.2022.9977587","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977587","url":null,"abstract":"This paper reports on a Ku-band high-power amplifier (HPA) monolithic microwave integrated circuit (MMIC) on 150-nm GaN-SiC high electron mobility transistor (HEMT) process, which exhibits high output power (13 W Psat) and high efficiency (45 % peak PAE) under pulse simulation with 100 $mumathrm{s}$ period and 10 % duty cycle. By employing wideband matching networks (MNs), the proposed HPA achieves 39.2 ‘” 41.2 dBm Pout and 35.7% ~ 45.4% PAE from 14.0 to 18.0 GHz. Power gain exceeds 17 dB in the operating band. The HPA chip dimensions are 2.55 mm by 1.3 mm. These results provide the potential for this HP A to be applied in satellite communications (SATCOM).","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"87 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":"131401901","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/IWS55252.2022.9977839
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}
The optical transparency of the microwave absorber is always emphasized, the effect of uneven transmittance which affects the imaging was ignored, thereby hindering further window application. Under the limitation of using uniform film, an absorber using transparent conductive film is designed for good-visual perception inspired by the Jaumann screen. Through adjusting impedance matching of the structure, the proposed absorber achieves 90% absorption in the range of 9.4 to 26 GHz (fractional bandwidth 93.7%). Meanwhile, the proposed structure measures 76.6% transmittance and 0.37% haze, denoting the application potential. It is believed that the proposed design strategy promotes the practicality process of transparent absorbers.
{"title":"Optical transparent microwave absorber for high-quality imaging","authors":"Zicheng Song, Pingping Min, Ruicong Zhang, Jiaqi Zhu","doi":"10.1109/IWS55252.2022.9977499","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977499","url":null,"abstract":"The optical transparency of the microwave absorber is always emphasized, the effect of uneven transmittance which affects the imaging was ignored, thereby hindering further window application. Under the limitation of using uniform film, an absorber using transparent conductive film is designed for good-visual perception inspired by the Jaumann screen. Through adjusting impedance matching of the structure, the proposed absorber achieves 90% absorption in the range of 9.4 to 26 GHz (fractional bandwidth 93.7%). Meanwhile, the proposed structure measures 76.6% transmittance and 0.37% haze, denoting the application potential. It is believed that the proposed design strategy promotes the practicality process of transparent absorbers.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"38 10S 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":"131963838","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}
This paper presents a novel wideband absorptive common-mode filter which is constructed by differential microstrip lines, two hybrid resonator unit-cells made of quarter-wavelength slot and microstrip structures, two lumped resistors, and a ground plane. Two resonator structures, including quar-ter-wavelength slot and microstrip lines, share the same resonant frequency at which the common-mode energy can be absorbed by lumped resistors. Furthermore, two resonator unit-cells are cascaded symmetrically beneath differential lines to realize bidi-rectional and wideband common-mode absorption. The measured results show that the proposed common-mode filter can exhibit low insertion loss for differential signals, and achieve a wide absorptive stopband from 1.55 to 2.65 GHz (Absorption ratio > 90%) with 52.38% fractional bandwidth simultaneously.
{"title":"Wideband Absorptive Common-Mode Filter Based on Hybrid Structures of Quarter-Wavelength Slot and Microstrip Resonators","authors":"Zhiyuan Niu, Peng Zhou, Hongxin Zhao, Shunli Li, Xiaoxing Yin","doi":"10.1109/IWS55252.2022.9977987","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9977987","url":null,"abstract":"This paper presents a novel wideband absorptive common-mode filter which is constructed by differential microstrip lines, two hybrid resonator unit-cells made of quarter-wavelength slot and microstrip structures, two lumped resistors, and a ground plane. Two resonator structures, including quar-ter-wavelength slot and microstrip lines, share the same resonant frequency at which the common-mode energy can be absorbed by lumped resistors. Furthermore, two resonator unit-cells are cascaded symmetrically beneath differential lines to realize bidi-rectional and wideband common-mode absorption. The measured results show that the proposed common-mode filter can exhibit low insertion loss for differential signals, and achieve a wide absorptive stopband from 1.55 to 2.65 GHz (Absorption ratio > 90%) with 52.38% fractional bandwidth simultaneously.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"26 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":"134244141","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/IWS55252.2022.9977707
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/IWS55252.2022.9977822
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/IWS55252.2022.9978070
Rui Duan, Bing Zhang
A leaky-wave antenna (LWA) based on half-mode substrate integrated waveguide (HMSIW) is proposed. The integrated phase inverters are used to eliminate half-wave offset from adjacent radiating elements. The ground plane is extended to reflect the quasi-magnetic dipole radiation pattern from the backfire to the porthole to enhance the antenna gain. Two linear arrays with differential feeding network are placed back-to-back along their longitude, by which the far-field radiation adds greatly that leads to further increased antenna gain. A manufactured prototype was tested to validate the concept.
{"title":"A High-gain Half-Mode SIW Leaky-wave Antenna","authors":"Rui Duan, Bing Zhang","doi":"10.1109/IWS55252.2022.9978070","DOIUrl":"https://doi.org/10.1109/IWS55252.2022.9978070","url":null,"abstract":"A leaky-wave antenna (LWA) based on half-mode substrate integrated waveguide (HMSIW) is proposed. The integrated phase inverters are used to eliminate half-wave offset from adjacent radiating elements. The ground plane is extended to reflect the quasi-magnetic dipole radiation pattern from the backfire to the porthole to enhance the antenna gain. Two linear arrays with differential feeding network are placed back-to-back along their longitude, by which the far-field radiation adds greatly that leads to further increased antenna gain. A manufactured prototype was tested to validate the concept.","PeriodicalId":126964,"journal":{"name":"2022 IEEE MTT-S International Wireless Symposium (IWS)","volume":"22 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":"123024740","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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