Pub Date : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8803951
M. Nguyen, J. Chiao
This paper proposes a method to represent 3-coil wireless power transfer (WPT) system consisting of transmitter (TX), receiver (RX) and repeater (RP) by equivalent transmission line model. The method is based on matrix reduction technic, in which the impedance matrix dimension of any cascade WPT systems can be reduced to 2×2. The system is designed to operate at 13.56MHz. The proposed method provides a better understanding of the 3-coil WPT system under the scope of nominal T transmission line model.
{"title":"Transmission Line Model of 3-coil WPT Systems","authors":"M. Nguyen, J. Chiao","doi":"10.1109/IEEE-IWS.2019.8803951","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803951","url":null,"abstract":"This paper proposes a method to represent 3-coil wireless power transfer (WPT) system consisting of transmitter (TX), receiver (RX) and repeater (RP) by equivalent transmission line model. The method is based on matrix reduction technic, in which the impedance matrix dimension of any cascade WPT systems can be reduced to 2×2. The system is designed to operate at 13.56MHz. The proposed method provides a better understanding of the 3-coil WPT system under the scope of nominal T transmission line model.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128815345","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8803930
Li-ming Zhou, E. Li, Tianwu Li, Da Li
In this paper, a high-performance 5G radome based on absorptive meta-surface is proposed, where an unit cell structure consists of a dielectric layer which is sandwiched between a top lossy layer and a bottom metallic layer. The thickness of radome is designed only 0.037λ, where the simulation results show that the proposed radome is totally transparent to the working band from 3.2 GHz to 3.8 GHz, with an insertion loss less than 0.2dB. Moreover, the spurious signals from 6.5GHz to 7.5GHz could be highly absorbed, with the absorption efficiency more than 90%. The radome is independent to the electromagnetic(EM) waves in both TE and TM modes. The working principle of this radome is also explained reasonably in the perspective of the equivalent circuit model. These results are quite helpful in designing the miniaturized antenna device for 5G communications, radar and military communications.
{"title":"High Performance 5G Antenna Radome Based on Absorptive Meta-surface","authors":"Li-ming Zhou, E. Li, Tianwu Li, Da Li","doi":"10.1109/IEEE-IWS.2019.8803930","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803930","url":null,"abstract":"In this paper, a high-performance 5G radome based on absorptive meta-surface is proposed, where an unit cell structure consists of a dielectric layer which is sandwiched between a top lossy layer and a bottom metallic layer. The thickness of radome is designed only 0.037λ, where the simulation results show that the proposed radome is totally transparent to the working band from 3.2 GHz to 3.8 GHz, with an insertion loss less than 0.2dB. Moreover, the spurious signals from 6.5GHz to 7.5GHz could be highly absorbed, with the absorption efficiency more than 90%. The radome is independent to the electromagnetic(EM) waves in both TE and TM modes. The working principle of this radome is also explained reasonably in the perspective of the equivalent circuit model. These results are quite helpful in designing the miniaturized antenna device for 5G communications, radar and military communications.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128904101","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 : 2019-05-01DOI: 10.1109/ieee-iws.2019.8804021
{"title":"IWS 2019 Message from the Technical Program Chairs","authors":"","doi":"10.1109/ieee-iws.2019.8804021","DOIUrl":"https://doi.org/10.1109/ieee-iws.2019.8804021","url":null,"abstract":"","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124395962","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, a triple-mode SIW resonator based on the SIW rectangular cavity and strip-line hybrid structure are proposed. The proposed triple-mode SIW cavity excites three frequency-tunable resonant modes. A filter based on the proposed triple-mode resonator is simulated and fabricated. The filter has high out-of-band rejection and sharp skirt selectivity due to two close band transmission zeros. In addition, the operating bandwidth of this filter can be controlled by changing the length of the trip-line and the position of the perturbed metallic vias. Finally, the simulated and measured results are presented and compared to verify the design method.
{"title":"A Novel Strip-Line Hybrid Triple-Mode SIW Filter","authors":"Huaishu Jing, Yonghong Zhang, Lili Qu, Yaohui Zhang","doi":"10.1109/IEEE-IWS.2019.8803871","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803871","url":null,"abstract":"In this paper, a triple-mode SIW resonator based on the SIW rectangular cavity and strip-line hybrid structure are proposed. The proposed triple-mode SIW cavity excites three frequency-tunable resonant modes. A filter based on the proposed triple-mode resonator is simulated and fabricated. The filter has high out-of-band rejection and sharp skirt selectivity due to two close band transmission zeros. In addition, the operating bandwidth of this filter can be controlled by changing the length of the trip-line and the position of the perturbed metallic vias. Finally, the simulated and measured results are presented and compared to verify the design method.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114777083","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8804096
M. W. Niaz, F. Khan, S. Zheng, M. S. Sadiq, Yuanfang Shang
Unit cell elements in a conventional reflectarray are designed to provide required reflection phase while keeping the reflection amplitude constant. This paper introduces novel resistive reflectarray elements where reflective amplitude can also be controlled along with phase variations. Reflective amplitude is controlled by the value of resistivity (in Ω/sq) while reflective phase is controlled by the element dimensions. A resistive square patch and resistive circular patch designed respectively at 16 GHz and 22 GHz are presented. Both designs show amplitude and phase variations for different resistivity values and element dimensions. These resistive elements can be printed on a substrate along with conventional metallic reflectarray elements resulting in a simplified reflectarray design without adding much fabrication complexity.
{"title":"On the Design of Resistive Reflectarray Elements having Both Amplitude and Phase Control","authors":"M. W. Niaz, F. Khan, S. Zheng, M. S. Sadiq, Yuanfang Shang","doi":"10.1109/IEEE-IWS.2019.8804096","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804096","url":null,"abstract":"Unit cell elements in a conventional reflectarray are designed to provide required reflection phase while keeping the reflection amplitude constant. This paper introduces novel resistive reflectarray elements where reflective amplitude can also be controlled along with phase variations. Reflective amplitude is controlled by the value of resistivity (in Ω/sq) while reflective phase is controlled by the element dimensions. A resistive square patch and resistive circular patch designed respectively at 16 GHz and 22 GHz are presented. Both designs show amplitude and phase variations for different resistivity values and element dimensions. These resistive elements can be printed on a substrate along with conventional metallic reflectarray elements resulting in a simplified reflectarray design without adding much fabrication complexity.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114664794","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8803893
A. Wong, K. A. Oyesina
This work summarizes the authors recent research experiences and identifies advantages which one can gain by designing a metasurface with coarse discretization. Whereas most metasurfaces approximate a continuous impedance variation with a finely-discretized one, we show that in some cases coarse-grained discretization yields surprising benefits. In the presentation, we will summarize our recent works which show that the coarse dis-cretization paradigm produces metasurface designs which are power efficient, simple to fabricate, and feature robust and broadband operation beyond traditional continuous metasurfaces. We will also preview our ongoing works in applying this paradigm to improve communication and imaging devices.
{"title":"Building Simple and Effective Metasurfaces by Coarse Discretization","authors":"A. Wong, K. A. Oyesina","doi":"10.1109/IEEE-IWS.2019.8803893","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803893","url":null,"abstract":"This work summarizes the authors recent research experiences and identifies advantages which one can gain by designing a metasurface with coarse discretization. Whereas most metasurfaces approximate a continuous impedance variation with a finely-discretized one, we show that in some cases coarse-grained discretization yields surprising benefits. In the presentation, we will summarize our recent works which show that the coarse dis-cretization paradigm produces metasurface designs which are power efficient, simple to fabricate, and feature robust and broadband operation beyond traditional continuous metasurfaces. We will also preview our ongoing works in applying this paradigm to improve communication and imaging devices.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116422515","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8804078
Yingdan Li, Q. Chu
A broadband dual-polarized antenna with second-order band-notched characteristics is discussed in this letter for base station applications. The proposed antenna consists of three parts: main radiator, feed structures, and reflector. By arranging a short-ended quarter-wavelength U-sharped stubs next to the feeding lines and slitting the short-ended half-wavelength split-ring slots on the main radiators, a second-order notched band is achieved. The simulated results show that it has a bandwidth of 54.3% along with a sharp notch band from 1.8 to 1.93 GHz. Having the advantages of dual polarization, wide bandwidth, and good radiation performance, the proposed antenna can find its application in the next-generation wireless communication systems.
{"title":"A Broadband Dual-Polarized Base Station Antenna With Second-Order Band-Notched Characteristics","authors":"Yingdan Li, Q. Chu","doi":"10.1109/IEEE-IWS.2019.8804078","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804078","url":null,"abstract":"A broadband dual-polarized antenna with second-order band-notched characteristics is discussed in this letter for base station applications. The proposed antenna consists of three parts: main radiator, feed structures, and reflector. By arranging a short-ended quarter-wavelength U-sharped stubs next to the feeding lines and slitting the short-ended half-wavelength split-ring slots on the main radiators, a second-order notched band is achieved. The simulated results show that it has a bandwidth of 54.3% along with a sharp notch band from 1.8 to 1.93 GHz. Having the advantages of dual polarization, wide bandwidth, and good radiation performance, the proposed antenna can find its application in the next-generation wireless communication systems.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121962576","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, a compact Darlington low noise amplifier ranging from 0.5 GHz up to 4.0 GHz is proposed in 2μm InGaP/GaAs HBT technology offering fT of 30GHz. This Darlington topology is composed of two common emitter amplifiers, which is used to achieve both advantageous high gain capacity and broad operation bandwidth for multi-system application. A good input and output matching are obtained using a feedback method to achieve low noise performance by adjusting feedback resistor and inductor. Measurement results from 0.5 GHz up to 4.0 GHz show that the proposed low noise amplifier achieved a gain of 17 to 24 dB, a noise figure less than 4.5 dB and input and output voltage standing wave ratio (VSWR) lower than 1.44 and 2, respectively. The output 1-dB compression power is about 17.5 dBm to 20.5dBm. The chip size is only 1.2*1.48 mm2.
{"title":"A 0.5 to 4.0GHz Low-Cost Broadband GaAs HBT Low Noise Amplifier","authors":"Q. Lin, Haifeng Wu, Yijun Chen, Liu-lin Hu, Xiao-Ming Zhang, Dan-hui Hu, Si-wei Chen","doi":"10.1109/IEEE-IWS.2019.8803946","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803946","url":null,"abstract":"In this paper, a compact Darlington low noise amplifier ranging from 0.5 GHz up to 4.0 GHz is proposed in 2μm InGaP/GaAs HBT technology offering fT of 30GHz. This Darlington topology is composed of two common emitter amplifiers, which is used to achieve both advantageous high gain capacity and broad operation bandwidth for multi-system application. A good input and output matching are obtained using a feedback method to achieve low noise performance by adjusting feedback resistor and inductor. Measurement results from 0.5 GHz up to 4.0 GHz show that the proposed low noise amplifier achieved a gain of 17 to 24 dB, a noise figure less than 4.5 dB and input and output voltage standing wave ratio (VSWR) lower than 1.44 and 2, respectively. The output 1-dB compression power is about 17.5 dBm to 20.5dBm. The chip size is only 1.2*1.48 mm2.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126113008","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8804088
Yuchen Ma, Junhong Wang, Weibin Hou
A kind of smart antenna with capability of automatic beam switching is presented. The antenna comprises of three radiation elements, i.e. two directional elements for field coverage in far region and one omnidirectional element for field coverage in near region, so as to improve the overall received power along a straight path and realize high efficiency and energy-saving of antenna. To validate the idea, two cases of smart antennas with different structures of radiation elements are investigated for both cases of half space and confined space. In addition, measurements are carried out and the results are in agreement with that of simulation. This kind of smart antenna could be a promising candidate for 5G applications.
{"title":"Smart Antenna with Capability of Beam Switching for 5G Applications","authors":"Yuchen Ma, Junhong Wang, Weibin Hou","doi":"10.1109/IEEE-IWS.2019.8804088","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804088","url":null,"abstract":"A kind of smart antenna with capability of automatic beam switching is presented. The antenna comprises of three radiation elements, i.e. two directional elements for field coverage in far region and one omnidirectional element for field coverage in near region, so as to improve the overall received power along a straight path and realize high efficiency and energy-saving of antenna. To validate the idea, two cases of smart antennas with different structures of radiation elements are investigated for both cases of half space and confined space. In addition, measurements are carried out and the results are in agreement with that of simulation. This kind of smart antenna could be a promising candidate for 5G applications.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125055243","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8804031
Chuanchao Fan, Cuiping Yu, Yuan’an Liu
In this paper, a novel polynomial model has been proposed to solve the problem of spectral overlap occurs in close dual-band. The proposed model effectively compensates for nonlinear distortion in closely spaced multi-carrier signals. The experimental results show that the proposed model can reduce more than 75% baseband sampling rate compared with the broadband digital predistortion (DPD) model. Moreover, the proposed model can achieve the similar adjacent channel power ratios (ACPRs) as with the broadband DPD model and more than 15dB ACPRs improvement compared with the two dimensional digital predistortion (2D-DPD) model.
{"title":"A Concurrent Dual-Band Square Root-Based Model Based on Memory Polynomial for Closely Spaced Signals","authors":"Chuanchao Fan, Cuiping Yu, Yuan’an Liu","doi":"10.1109/IEEE-IWS.2019.8804031","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804031","url":null,"abstract":"In this paper, a novel polynomial model has been proposed to solve the problem of spectral overlap occurs in close dual-band. The proposed model effectively compensates for nonlinear distortion in closely spaced multi-carrier signals. The experimental results show that the proposed model can reduce more than 75% baseband sampling rate compared with the broadband digital predistortion (DPD) model. Moreover, the proposed model can achieve the similar adjacent channel power ratios (ACPRs) as with the broadband DPD model and more than 15dB ACPRs improvement compared with the two dimensional digital predistortion (2D-DPD) model.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129110231","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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