A broadband circularly polarized (CP) metasurface antenna based on double pentagonal elements is proposed. The antenna is mainly composed of a microstrip coupling feeding I-shaped slot, a metasurface and an air layer. The I-shaped slot generates linearly polarized (LP) waves, and the metasurface completes the conversion from LP waves to CP waves. The simulated results show that the impedance bandwidth of the antenna is 6.9-8.9GHz, and the 3dB axial ratio bandwidth is 7.21–8.50GHz. It can be widely used in wireless communication systems for simple structure and wide 3dB axial ratio bandwidth.
{"title":"Design of Broadband Circularly Polarized Metasurface Antenna Based on Dual-pentagonal Units","authors":"Q. Peng, Zhongliang Lu, Miao Liu, Chao Liao, Xiangjun Tan, Qian Song","doi":"10.1109/ucmmt53364.2021.9569895","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569895","url":null,"abstract":"A broadband circularly polarized (CP) metasurface antenna based on double pentagonal elements is proposed. The antenna is mainly composed of a microstrip coupling feeding I-shaped slot, a metasurface and an air layer. The I-shaped slot generates linearly polarized (LP) waves, and the metasurface completes the conversion from LP waves to CP waves. The simulated results show that the impedance bandwidth of the antenna is 6.9-8.9GHz, and the 3dB axial ratio bandwidth is 7.21–8.50GHz. It can be widely used in wireless communication systems for simple structure and wide 3dB axial ratio bandwidth.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126763556","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569911
Haiyan Lu, Kai Zhang, Tangsheng Chen, Jixin Chen
This paper briefly introduces the fabrication of GaN FinFET devices and its DC and microwave characteristics. GaN FinFET exhibits better linearity, higher current density and power density. A large signal equivalent circuit modeling for GaN FinFETs is presented in this paper. The improved Rs and current equation are shown in the paper. The simulation results of DC and S parameter models are compared with the measured ones. The results show that the model has high precision and good convergence and can be used in circuit design.
{"title":"Modeling Techniques for GaN FinFET","authors":"Haiyan Lu, Kai Zhang, Tangsheng Chen, Jixin Chen","doi":"10.1109/ucmmt53364.2021.9569911","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569911","url":null,"abstract":"This paper briefly introduces the fabrication of GaN FinFET devices and its DC and microwave characteristics. GaN FinFET exhibits better linearity, higher current density and power density. A large signal equivalent circuit modeling for GaN FinFETs is presented in this paper. The improved Rs and current equation are shown in the paper. The simulation results of DC and S parameter models are compared with the measured ones. The results show that the model has high precision and good convergence and can be used in circuit design.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130677630","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, an application of Gaussian mode analysis method is discussed. The mode synthesis method is used to realize the synthesis of specified pattern. Taking the ideal radiation function of the feed with the compact field of the biased single mirror as an example, an approximate radiation function is synthesized by using the Gaussian modes of different orders. The difference between the ideal radiation pattern and the synthetic pattern in the central region is less than ± 0.2dB. The method is a fast and efficient quasi optical system design technology.
{"title":"Pattern Synthesis Method Based on Gaussian Beam Mode Analysis","authors":"Zhuhang Gong, Tianyang Chen, Junsheng Yu, Yuan Yao, Xiao-dong Chen","doi":"10.1109/ucmmt53364.2021.9569841","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569841","url":null,"abstract":"In this paper, an application of Gaussian mode analysis method is discussed. The mode synthesis method is used to realize the synthesis of specified pattern. Taking the ideal radiation function of the feed with the compact field of the biased single mirror as an example, an approximate radiation function is synthesized by using the Gaussian modes of different orders. The difference between the ideal radiation pattern and the synthetic pattern in the central region is less than ± 0.2dB. The method is a fast and efficient quasi optical system design technology.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123812633","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569914
Jin Zhang, Y. Alfadhl, Xiao-dong Chen, Liang Zhang, A. Cross
We have designed a dual-band backward wave oscillator (BWO) using a double staggered grating (DSG) slow-wave structure (SWS) and a pseudospark-sourced sheet electron beam. In the simulation of the high-frequency characteristics, the DSG SWS has been shown a wide operating band of 72–125 GHz and a high coupling impedance. The complete structure of the BWO consists of 10 DSG SWS units, together with a wideband output structure. In the cold-test simulation of the DSG BWO, the transmission is greater than −7 dB in the band 74–100 GHz, and 109–125 GHz. The hot-test performance of the DSG BWO is analysed by particle-in-cell (PIC) simulation, showing dual-band operation in 75–100 GHz (25-GHz bandwidth) and 108–115 GHz (7-GHz bandwidth), with high output power (max. 162 kW).
{"title":"Design of Dual-Band High-Power Backward Wave Oscillator using Double Staggered Grating and Pseudospark-Sourced Sheet Beam","authors":"Jin Zhang, Y. Alfadhl, Xiao-dong Chen, Liang Zhang, A. Cross","doi":"10.1109/ucmmt53364.2021.9569914","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569914","url":null,"abstract":"We have designed a dual-band backward wave oscillator (BWO) using a double staggered grating (DSG) slow-wave structure (SWS) and a pseudospark-sourced sheet electron beam. In the simulation of the high-frequency characteristics, the DSG SWS has been shown a wide operating band of 72–125 GHz and a high coupling impedance. The complete structure of the BWO consists of 10 DSG SWS units, together with a wideband output structure. In the cold-test simulation of the DSG BWO, the transmission is greater than −7 dB in the band 74–100 GHz, and 109–125 GHz. The hot-test performance of the DSG BWO is analysed by particle-in-cell (PIC) simulation, showing dual-band operation in 75–100 GHz (25-GHz bandwidth) and 108–115 GHz (7-GHz bandwidth), with high output power (max. 162 kW).","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125641417","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569874
Zhongqian Niu, Bingli Dai, Bo Zhang, Yong Fan
In this paper, a 170GHz frequency tripler is designed by using the collaborative simulation method of “field” and “circuit”. The frequency multiplier adopts reverse-paralleled diode-pair structure to realize frequency tripling without bias. When the input driving power of the designed 170GHz tripler is about 100mW, the efficiency can reach 9%.
{"title":"170 GHz Passive Tripler Based on Schottky Barrier Diodes","authors":"Zhongqian Niu, Bingli Dai, Bo Zhang, Yong Fan","doi":"10.1109/ucmmt53364.2021.9569874","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569874","url":null,"abstract":"In this paper, a 170GHz frequency tripler is designed by using the collaborative simulation method of “field” and “circuit”. The frequency multiplier adopts reverse-paralleled diode-pair structure to realize frequency tripling without bias. When the input driving power of the designed 170GHz tripler is about 100mW, the efficiency can reach 9%.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133379917","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}
A high performance terahertz tri-reflector compact antenna test range (CATR) with ultra-large aperture is presented in this paper. The tri-reflector CATR system is composed of a parabolic main reflector and two shaped sub-reflectors. The aperture size of the main reflector is 7 m, while the size of the two sub-reflectors are about 0.55 m × 0.55 m and 0.44 m × 0.44 m respectively. By using B-spline surface reconstruction and dynamic ray-tracing approach, two shaped sub-reflectors are synthesized. The tri-reflector CATR which can generate a regional pseudo-plane wave in a very short distance, is commonly employed to measure electrically large aperture antennas, and this region is generally referred to as a quiet zone (QZ). The designed tri-reflector CATR system is modeled and simulated. The numerical analysis and simulation results demonstrate that a peak-to-peak amplitude (phase) ripple <1 dB (5°) and a cross-polarization isolation >50 dB can be achieved on the principal cuts of the QZ at 100–500 GHz, and furthermore, the QZ usage ratio of the CATR can reach up to 80%. All these show that the tri-reflector CATR system has a high QZ performance, and the effectiveness of the system design has also been verified.
介绍了一种高性能超大口径太赫兹三反射镜小型天线测试装置。三反射面CATR系统由一个抛物线形主反射面和两个形副反射面组成。主反射镜孔径为7 m，两个副反射镜孔径分别约为0.55 m × 0.55 m和0.44 m × 0.44 m。采用b样条曲面重建和动态光线追踪方法，合成了两个形状子反射镜。三反射面CATR可以在很短的距离内产生区域伪平面波，通常用于测量电大孔径天线，该区域通常称为安静区(QZ)。对所设计的三反射器CATR系统进行了建模和仿真。数值分析和仿真结果表明，在100-500 GHz的主切频段上，该CATR的QZ利用率可达80%，峰值幅值(相位)纹波可达50 dB。结果表明，三反射面CATR系统具有较高的QZ性能，验证了系统设计的有效性。
{"title":"Design of High Performance Terahertz Tri-reflector CATR with Ultra-Large Aperture","authors":"Zhi Li, Yuan Yao, Tianyang Chen, Xiao-he Cheng, Junsheng Yu, Xiao-dong Chen","doi":"10.1109/ucmmt53364.2021.9569930","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569930","url":null,"abstract":"A high performance terahertz tri-reflector compact antenna test range (CATR) with ultra-large aperture is presented in this paper. The tri-reflector CATR system is composed of a parabolic main reflector and two shaped sub-reflectors. The aperture size of the main reflector is 7 m, while the size of the two sub-reflectors are about 0.55 m × 0.55 m and 0.44 m × 0.44 m respectively. By using B-spline surface reconstruction and dynamic ray-tracing approach, two shaped sub-reflectors are synthesized. The tri-reflector CATR which can generate a regional pseudo-plane wave in a very short distance, is commonly employed to measure electrically large aperture antennas, and this region is generally referred to as a quiet zone (QZ). The designed tri-reflector CATR system is modeled and simulated. The numerical analysis and simulation results demonstrate that a peak-to-peak amplitude (phase) ripple <1 dB (5°) and a cross-polarization isolation >50 dB can be achieved on the principal cuts of the QZ at 100–500 GHz, and furthermore, the QZ usage ratio of the CATR can reach up to 80%. All these show that the tri-reflector CATR system has a high QZ performance, and the effectiveness of the system design has also been verified.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124285537","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569902
Y. Du, Tianliang Zhang, Di Jiang, Yin Jin, Yiheng Zhang, Lijun Feng, Jie Gao, Kainan Qi
A planar reflectarray antenna based on liquid crystal materials is presented in this paper. First, a new type of loop dipole miniaturized liquid crystal antenna reflection unit is constructed. The reflector unit can achieve 400° phase shift at 35GHz, and the loss is less than 4.5dB. Then, an 11×11 liquid crystal reflectarray antenna is designed using this unit, and the main beam scanning angle range of the array antenna reached ±20°. When the deflection angle of the array antenna is 20°, the gain of the antenna is 14.9dBi, and the first sidelobe level is −9.1dB.
{"title":"Research on electronically controlled planar reflectarray antenna based on liquid crystal material","authors":"Y. Du, Tianliang Zhang, Di Jiang, Yin Jin, Yiheng Zhang, Lijun Feng, Jie Gao, Kainan Qi","doi":"10.1109/ucmmt53364.2021.9569902","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569902","url":null,"abstract":"A planar reflectarray antenna based on liquid crystal materials is presented in this paper. First, a new type of loop dipole miniaturized liquid crystal antenna reflection unit is constructed. The reflector unit can achieve 400° phase shift at 35GHz, and the loss is less than 4.5dB. Then, an 11×11 liquid crystal reflectarray antenna is designed using this unit, and the main beam scanning angle range of the array antenna reached ±20°. When the deflection angle of the array antenna is 20°, the gain of the antenna is 14.9dBi, and the first sidelobe level is −9.1dB.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114779386","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569948
S. Muttlak, M. Sadeghi, K. Ian, M. Missous
This work reports on the design and analysis of a folded antenna operating at mm-wave frequencies. Prior to this, several folded antennas operating at 7, 9 and 10GHz frequencies were used to validate the simulation procedure performed. A mm-wave folded antenna with a resonant frequency of 39GHz was then simulated. A relatively small antenna geometry was achieved without sacrificing its gain and other crucial characteristics. A 3.5dB gain and 4.6dBi directivity were obtained with a frequency bandwidth reaching 780MHz. The main and secondary arm widths of the folded antenna are key in determining the real and imaginary parts of the antenna impedance, providing a degree of freedom for the designer to get the antenna well-matched with the subsequent integrated circuit. This provides useful features including the capability of reducing the overall antenna dimensions and avoiding matching circuits.
{"title":"Miniaturized Folded Antenna with Improved Matching Characteristic for mm-wave Detections","authors":"S. Muttlak, M. Sadeghi, K. Ian, M. Missous","doi":"10.1109/ucmmt53364.2021.9569948","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569948","url":null,"abstract":"This work reports on the design and analysis of a folded antenna operating at mm-wave frequencies. Prior to this, several folded antennas operating at 7, 9 and 10GHz frequencies were used to validate the simulation procedure performed. A mm-wave folded antenna with a resonant frequency of 39GHz was then simulated. A relatively small antenna geometry was achieved without sacrificing its gain and other crucial characteristics. A 3.5dB gain and 4.6dBi directivity were obtained with a frequency bandwidth reaching 780MHz. The main and secondary arm widths of the folded antenna are key in determining the real and imaginary parts of the antenna impedance, providing a degree of freedom for the designer to get the antenna well-matched with the subsequent integrated circuit. This provides useful features including the capability of reducing the overall antenna dimensions and avoiding matching circuits.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117263349","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569944
Weihao Qi, Xianling Liang, Lei Xiang, Yanchang Gao, Jun-ping Geng, R. Jin
A broadband dual-polarisation and three-mode OAM cassegrain antenna in W-band is proposed. The antenna consists of two parts. One is a dual-polarised open-ended square waveguide antenna double-ring antenna array as a feed, which is designed to generate OAM beams with modes of l= ±1 and +2, and the other is a cassegrain reflector, which is designed to converge the OAM beams. The proposed antenna has a 10dB impendance bandwidth beyond 24.9%, gains better than 26.6dBi, side-lobe levels lower than −10.7dB, and cross-polarisation levels lower than −15dB.
{"title":"A W-band Broadband Cassegrain Antenna with Polarisation and OAM Multiplexing","authors":"Weihao Qi, Xianling Liang, Lei Xiang, Yanchang Gao, Jun-ping Geng, R. Jin","doi":"10.1109/ucmmt53364.2021.9569944","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569944","url":null,"abstract":"A broadband dual-polarisation and three-mode OAM cassegrain antenna in W-band is proposed. The antenna consists of two parts. One is a dual-polarised open-ended square waveguide antenna double-ring antenna array as a feed, which is designed to generate OAM beams with modes of l= ±1 and +2, and the other is a cassegrain reflector, which is designed to converge the OAM beams. The proposed antenna has a 10dB impendance bandwidth beyond 24.9%, gains better than 26.6dBi, side-lobe levels lower than −10.7dB, and cross-polarisation levels lower than −15dB.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121918812","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 : 2021-09-13DOI: 10.1109/ucmmt53364.2021.9569891
Fei Cheng, Chao Gu, K. Huang
This paper presents a Ka-band rectenna which contains a double-port antenna connected with two rectifiers for wireless power transfer. The horn antenna is formed by two stacked apertures to minimize the antenna height. The horn antenna is connected to 1-to-2 power divider to form a double-port antenna. The power divider would be connected to the two same efficient rectifiers. With this rectenna topology, the power handling capability would be enhanced by 2 times. At 34.5 GHz, the designed antenna has a realized gain of 11.1 dBi, the designed power divider has insertion loss of 3.07 dB, and the rectifier has a power conversion efficiency of 50% when the load is 300 Ω and the input power is 22 dBm. It can be predicted that the rectenna can handle at least 25 dBm input power.
{"title":"Ka-band Rectenna With Enhanced Power Handling Capability Using Double-port Horn Antenna","authors":"Fei Cheng, Chao Gu, K. Huang","doi":"10.1109/ucmmt53364.2021.9569891","DOIUrl":"https://doi.org/10.1109/ucmmt53364.2021.9569891","url":null,"abstract":"This paper presents a Ka-band rectenna which contains a double-port antenna connected with two rectifiers for wireless power transfer. The horn antenna is formed by two stacked apertures to minimize the antenna height. The horn antenna is connected to 1-to-2 power divider to form a double-port antenna. The power divider would be connected to the two same efficient rectifiers. With this rectenna topology, the power handling capability would be enhanced by 2 times. At 34.5 GHz, the designed antenna has a realized gain of 11.1 dBi, the designed power divider has insertion loss of 3.07 dB, and the rectifier has a power conversion efficiency of 50% when the load is 300 Ω and the input power is 22 dBm. It can be predicted that the rectenna can handle at least 25 dBm input power.","PeriodicalId":117712,"journal":{"name":"2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130653544","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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