Pub Date : 2018-05-07DOI: 10.1109/ICMMT.2018.8563512
Hong Wang, Zhaoyang Zhang, Xiaoming Chen
Opportunistic beamforming has always been attracting plenty of attentions due to its capability of inducing large channel fluctuations and providing high multiuser diversity gain. However, in most of the existing opportunistic beamforming schemes, only one user is scheduled for data transmission at each time slot. To serve more users simultaneously, in this paper, a novel non-orthogonal scheduling algorithm is proposed from the perspectives of perfect successive interference cancellation (SIC) and system rate maximization. Simulation results validate that the proposed scheme achieves an obvious performance gain over two conventional baseline schemes.
{"title":"Successive Interference Cancellation Based Non-Orthogonal Opportunistic Beamforming","authors":"Hong Wang, Zhaoyang Zhang, Xiaoming Chen","doi":"10.1109/ICMMT.2018.8563512","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563512","url":null,"abstract":"Opportunistic beamforming has always been attracting plenty of attentions due to its capability of inducing large channel fluctuations and providing high multiuser diversity gain. However, in most of the existing opportunistic beamforming schemes, only one user is scheduled for data transmission at each time slot. To serve more users simultaneously, in this paper, a novel non-orthogonal scheduling algorithm is proposed from the perspectives of perfect successive interference cancellation (SIC) and system rate maximization. Simulation results validate that the proposed scheme achieves an obvious performance gain over two conventional baseline schemes.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115028157","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8564010
Q. Hu, Xiaofang Zhu, Yu-Lu Hu, Bin Li
Microwave Tube Simulator Suite (MTSS) is a fully featured tightly integrated software package for microwave tube analysis and design. Recently, some improvements have been made to improve the performance and to make it suitable for simulation of millimeter wave and terahertz vacuum electronic devices. In the paper, the improvements are introduced and a Terahertz folded waveguide traveling wave tube is simulated. The comparison between MTSS and CST PS simulation is performed and the improvements are validated.
{"title":"Improvements of MTSS for Simulation of Millimeter and Terahertz Vacuum Electronic Devices","authors":"Q. Hu, Xiaofang Zhu, Yu-Lu Hu, Bin Li","doi":"10.1109/ICMMT.2018.8564010","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8564010","url":null,"abstract":"Microwave Tube Simulator Suite (MTSS) is a fully featured tightly integrated software package for microwave tube analysis and design. Recently, some improvements have been made to improve the performance and to make it suitable for simulation of millimeter wave and terahertz vacuum electronic devices. In the paper, the improvements are introduced and a Terahertz folded waveguide traveling wave tube is simulated. The comparison between MTSS and CST PS simulation is performed and the improvements are validated.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128353947","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563446
Jingyuan Wang, Hongxi Yu, Fei Yang
This paper proposed a design of micro-strip line class-E power amplifier based on GaN HEMT devices working at 2.2GHz. By means of part harmonics suppression and inductance effect enhancing in the drain bias circuit, ideal class-E voltage and current waveform at drain and high efficiency were achieved. The combining simulation results demonstrate 74.8% PAE, 15.1dB power gain and 41.16dBm output power with 26dBm input power.
{"title":"Design of GaN HEMT Class-E Power Amplifier for Satellite Communication","authors":"Jingyuan Wang, Hongxi Yu, Fei Yang","doi":"10.1109/ICMMT.2018.8563446","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563446","url":null,"abstract":"This paper proposed a design of micro-strip line class-E power amplifier based on GaN HEMT devices working at 2.2GHz. By means of part harmonics suppression and inductance effect enhancing in the drain bias circuit, ideal class-E voltage and current waveform at drain and high efficiency were achieved. The combining simulation results demonstrate 74.8% PAE, 15.1dB power gain and 41.16dBm output power with 26dBm input power.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121360176","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563948
Min Wang, Q. Chu
This paper presents a reconfigurable water dense dielectric patch antenna (DDPA) with cross-shape feeding structure. The distilled water patch acts as an electric wall. The height of distilled water in the polyvinyl chloride (PVC) plastic box can be adjusted for frequency reconfiguration. The cross-shape feeding structure and the cylindrical copper is used for improving the impedance matching. Moreover, an air gap is inserted between the water patch and the substrate to improve radiation efficiency. Impedance bandwidth of the antenna achieves 20% and radiation efficiency is 50%-75%.
{"title":"A Reconfigurable Water Dense Dielectric Patch Antenna with Cross-Shape Feeding Structure","authors":"Min Wang, Q. Chu","doi":"10.1109/ICMMT.2018.8563948","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563948","url":null,"abstract":"This paper presents a reconfigurable water dense dielectric patch antenna (DDPA) with cross-shape feeding structure. The distilled water patch acts as an electric wall. The height of distilled water in the polyvinyl chloride (PVC) plastic box can be adjusted for frequency reconfiguration. The cross-shape feeding structure and the cylindrical copper is used for improving the impedance matching. Moreover, an air gap is inserted between the water patch and the substrate to improve radiation efficiency. Impedance bandwidth of the antenna achieves 20% and radiation efficiency is 50%-75%.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122042035","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563333
Yang Yaozhou, Feng Gui-rong, Lei Chen, Yue Hao, Xue Run-dong
A broadband circularly polarized (CP) monopole antenna with an annular open-loop is presented. By introducing an gap on the loop, the presented antenna features broadband and produces a bidirectional CP radiation. The simulated results show that the proposed antenna has the advantage of broadband CP characteristics in terms of an impedance bandwidth with $mathbf{S11 < -10 dB}$ of 96.1% from 2.7 to 7.7 GHz and a 3-dB axial ratio (AR) bandwidth of 81.3% in the frequency range of 2.7 to 6.4 GHz.
{"title":"Broadband Circularly Polarized Monopole Antenna with an Open loop","authors":"Yang Yaozhou, Feng Gui-rong, Lei Chen, Yue Hao, Xue Run-dong","doi":"10.1109/ICMMT.2018.8563333","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563333","url":null,"abstract":"A broadband circularly polarized (CP) monopole antenna with an annular open-loop is presented. By introducing an gap on the loop, the presented antenna features broadband and produces a bidirectional CP radiation. The simulated results show that the proposed antenna has the advantage of broadband CP characteristics in terms of an impedance bandwidth with $mathbf{S11 < -10 dB}$ of 96.1% from 2.7 to 7.7 GHz and a 3-dB axial ratio (AR) bandwidth of 81.3% in the frequency range of 2.7 to 6.4 GHz.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123783844","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563277
Juan-Feng Zhu, C. Du, Shi Pan, Pu‐Kun Liu
In this paper, a metallic grating structure with varying depth is presented for beam-wave interaction. The DC electron beam flies above the structure and backward spoof surface plasmon mode is excited. When the electromagnetic power flow reaches the left-hand of grating structure, it is trapped down and reflected to propagate forwardly due to rainbow trapped storage of terahertz wave. With energy reflecting and transmitting at both ends of this structure, a regenerate feedback is realized and a THz pulse is amplified repeatedly. This system achieved the maximum output power over 1.5 W after four times of reflections at 1 THz with a 3 kV/20mA electron beam.
{"title":"A Regenerate Feedback Terahertz Electronic Source Using Rainbow-Trapping Grating","authors":"Juan-Feng Zhu, C. Du, Shi Pan, Pu‐Kun Liu","doi":"10.1109/ICMMT.2018.8563277","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563277","url":null,"abstract":"In this paper, a metallic grating structure with varying depth is presented for beam-wave interaction. The DC electron beam flies above the structure and backward spoof surface plasmon mode is excited. When the electromagnetic power flow reaches the left-hand of grating structure, it is trapped down and reflected to propagate forwardly due to rainbow trapped storage of terahertz wave. With energy reflecting and transmitting at both ends of this structure, a regenerate feedback is realized and a THz pulse is amplified repeatedly. This system achieved the maximum output power over 1.5 W after four times of reflections at 1 THz with a 3 kV/20mA electron beam.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125786049","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563614
S. Sui, Hua Ma, Jie-qiu Zhang, Jiafu Wang, Zhuo Xu, S. Qu
The metasurfaces have recently been demonstrated to provide full control of the phase responses of electromagnetic (EM) wave scattering over subwavelength scales, enabling a wide range of practical applications. Here, a method for fast design of polarization-independent metasurfaces is proposed. A nonlinear fitting scenarios is employed to precisely predict reflective phase response of the metasurface. To obtain the optimal performance, nonlinear fitting scheme and genetic algorithm are combined. Since low-Q-factor resonant able to introduce wideband and smooth phase response, combining with lossless substrate, the metasurface with high reflective amplitude and wideband corresponding phase response can be obtained. As verify, two types metasurface examples characterized of coding metasurface on RCS reduction and reflective focusing lens are demonstrated.
{"title":"Fast Design of Polarization Independent Metasurfaces for Shaping Electromagnetic Waves","authors":"S. Sui, Hua Ma, Jie-qiu Zhang, Jiafu Wang, Zhuo Xu, S. Qu","doi":"10.1109/ICMMT.2018.8563614","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563614","url":null,"abstract":"The metasurfaces have recently been demonstrated to provide full control of the phase responses of electromagnetic (EM) wave scattering over subwavelength scales, enabling a wide range of practical applications. Here, a method for fast design of polarization-independent metasurfaces is proposed. A nonlinear fitting scenarios is employed to precisely predict reflective phase response of the metasurface. To obtain the optimal performance, nonlinear fitting scheme and genetic algorithm are combined. Since low-Q-factor resonant able to introduce wideband and smooth phase response, combining with lossless substrate, the metasurface with high reflective amplitude and wideband corresponding phase response can be obtained. As verify, two types metasurface examples characterized of coding metasurface on RCS reduction and reflective focusing lens are demonstrated.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122292008","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563858
Jianxin Jing, Jialin Cai, Chao Yu
In this paper, the tolerance of power amplifier's (PA) characteristics is investigated for a shared digital predistortion (DPD) solution for massive multiple-input multiple-output (MIMO) systems. By modeling different behaviors, the range of model coefficients can be employed to indicate the similarity of PAs and calculated by adding an offset to the least-squares objective function. Simulation results of a 16-path transmitter with 16 similar PAs are presented, which show that these PAs can be linearized by only one share DPD and the adjacent channel leakage ratio (ACLR) for all branches can meet the specific spectrum requirement, that is, -45 dBc.
{"title":"Tolerance on Power Amplifier Characteristics for the Linearization of Massive MIMO Systems","authors":"Jianxin Jing, Jialin Cai, Chao Yu","doi":"10.1109/ICMMT.2018.8563858","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563858","url":null,"abstract":"In this paper, the tolerance of power amplifier's (PA) characteristics is investigated for a shared digital predistortion (DPD) solution for massive multiple-input multiple-output (MIMO) systems. By modeling different behaviors, the range of model coefficients can be employed to indicate the similarity of PAs and calculated by adding an offset to the least-squares objective function. Simulation results of a 16-path transmitter with 16 similar PAs are presented, which show that these PAs can be linearized by only one share DPD and the adjacent channel leakage ratio (ACLR) for all branches can meet the specific spectrum requirement, that is, -45 dBc.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122330885","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563842
Shutao Fang, Z. Xue, Weiming Li, W. Ren
In this paper, a method using genetic algorithm to suppress the grating lobe of a wideband planar array is presented. With the alteration of operating frequency point, the electrical size of distance between two adjacent elements will change thereupon. This approach achieves the suppression of grating lobe at high operating frequency point, whose highest sidelobe level is around −10 dB, with little influence to array's radiation characteristic of lower frequency point. For this approach's practicability, simple dipole antenna is adopted as the array's element to check out whether the approach keeps validity by simulation.
{"title":"Grating Lobe Suppression of Planar Array with Large Inter-Element Spacing by Using Genetic Algorithm","authors":"Shutao Fang, Z. Xue, Weiming Li, W. Ren","doi":"10.1109/ICMMT.2018.8563842","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563842","url":null,"abstract":"In this paper, a method using genetic algorithm to suppress the grating lobe of a wideband planar array is presented. With the alteration of operating frequency point, the electrical size of distance between two adjacent elements will change thereupon. This approach achieves the suppression of grating lobe at high operating frequency point, whose highest sidelobe level is around −10 dB, with little influence to array's radiation characteristic of lower frequency point. For this approach's practicability, simple dipole antenna is adopted as the array's element to check out whether the approach keeps validity by simulation.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122608720","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 : 2018-05-07DOI: 10.1109/ICMMT.2018.8563356
Jiachen Xu, B. Lan, Chenjiang Guo, Jun Ding
In this paper, with the use of dielectric resonator antennas (DRA), a novel C/Ku band dual liner polarized shared aperture subarray is designed for SAR applications. Cross placed dual polarized printed dipoles are used for C band and several techniques is implemented for broaden the bandwidth. Ku band is consist of 4 hybrid fed, “pair-wise, anti-phase” placed dual polarized DRAs for better isolation and low cross polarization. Simulation data show that good bandwidth, polarization-isolation and radiation performance are got, and this subarray is able to be scaled to a larger radiating aperture.
{"title":"A Novel C/Ku Dual-Band Dual-Polarized Shared Aperture Antenna for SAR Applications","authors":"Jiachen Xu, B. Lan, Chenjiang Guo, Jun Ding","doi":"10.1109/ICMMT.2018.8563356","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563356","url":null,"abstract":"In this paper, with the use of dielectric resonator antennas (DRA), a novel C/Ku band dual liner polarized shared aperture subarray is designed for SAR applications. Cross placed dual polarized printed dipoles are used for C band and several techniques is implemented for broaden the bandwidth. Ku band is consist of 4 hybrid fed, “pair-wise, anti-phase” placed dual polarized DRAs for better isolation and low cross polarization. Simulation data show that good bandwidth, polarization-isolation and radiation performance are got, and this subarray is able to be scaled to a larger radiating aperture.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"580 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114883956","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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