Pub Date : 2018-05-07DOI: 10.1109/ICMMT.2018.8563461
Fang Yuan, He-xiu Xu, Guangming Wang, P. Xie, Mao Liu, K. Wu
In this paper, a simple and efficient approach is proposed to achieve radar cross-section based on a parabolic-phased diffused metasurface. According to the phase compensation theory, the horizontal reflected plane can be fashioned into curved reflected surface by shaping the specific phase distribution, which could redirect the reflected electromagnetic (EM) wave into different directions. The phase distribution of the flat metasurface can be easily obtained by Matlab. Then, we can arrange the designed meta-atoms with different phase responses to achieve the parabolic phase. Both numerical and simulated results shows that our approach can efficiently reduce RCS and diffuse the reflected wave at a broadband frequency from 10.8-22GHz (-7dB).
{"title":"Broadband RCS Reduction Based on Parabolic-Phased Diffused Metasurface","authors":"Fang Yuan, He-xiu Xu, Guangming Wang, P. Xie, Mao Liu, K. Wu","doi":"10.1109/ICMMT.2018.8563461","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563461","url":null,"abstract":"In this paper, a simple and efficient approach is proposed to achieve radar cross-section based on a parabolic-phased diffused metasurface. According to the phase compensation theory, the horizontal reflected plane can be fashioned into curved reflected surface by shaping the specific phase distribution, which could redirect the reflected electromagnetic (EM) wave into different directions. The phase distribution of the flat metasurface can be easily obtained by Matlab. Then, we can arrange the designed meta-atoms with different phase responses to achieve the parabolic phase. Both numerical and simulated results shows that our approach can efficiently reduce RCS and diffuse the reflected wave at a broadband frequency from 10.8-22GHz (-7dB).","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"79 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":"115020047","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.2018.8563487
Mingbo Cai, Song Han, Hongxin Xiang, Zehong Yan, Tianling Zhang
In this paper, a planar substrate integrated waveguide mono-pulse slot array antenna is presented. The $pmb{8times 8}$ slot array antenna and the sum-difference comparator are designed on separated layers which takes the advantage of low profile and high aperture efficiency. The round corners are adopted to design the feeding network. The maximum gain of sum pattern at 10 GHz is around 22.1dB with side lobe suppression of -14 dB in both E-plane and H-plane. This proposed antenna presents a good candidate for the directional-finding systems which are restricted by profile.
{"title":"A Planar Substrate Integrated Waveguide Mono-Pulse H-Shaped Slot Array Antenna","authors":"Mingbo Cai, Song Han, Hongxin Xiang, Zehong Yan, Tianling Zhang","doi":"10.1109/ICMMT.2018.8563487","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563487","url":null,"abstract":"In this paper, a planar substrate integrated waveguide mono-pulse slot array antenna is presented. The $pmb{8times 8}$ slot array antenna and the sum-difference comparator are designed on separated layers which takes the advantage of low profile and high aperture efficiency. The round corners are adopted to design the feeding network. The maximum gain of sum pattern at 10 GHz is around 22.1dB with side lobe suppression of -14 dB in both E-plane and H-plane. This proposed antenna presents a good candidate for the directional-finding systems which are restricted by profile.","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":"125818348","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.2018.8563499
Lei Zhang, X. Q. Chen, T. Cui
Vortex beams carrying orbital angular momentum (OAM) have been extensively realized using different approaches. Here, we present a Pancharatnam-Berry (PB) metasurface to generate broadband multiple vortex beams, which can carry different OAM modes towards different directions. The proposed PB metasurface could control the circularly polarized incident waves by attaching geometric phase to the orientation angle of the anisotropic meta-atoms. This design is numerically demonstrated at Ku band (12–18 GHz) and can be further exploited for OAM multiplexing in the communication systems.
{"title":"Generation of Broadband Multiple OAM Modes Using Pancharatnam-Berry Metasurface","authors":"Lei Zhang, X. Q. Chen, T. Cui","doi":"10.1109/ICMMT.2018.8563499","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563499","url":null,"abstract":"Vortex beams carrying orbital angular momentum (OAM) have been extensively realized using different approaches. Here, we present a Pancharatnam-Berry (PB) metasurface to generate broadband multiple vortex beams, which can carry different OAM modes towards different directions. The proposed PB metasurface could control the circularly polarized incident waves by attaching geometric phase to the orientation angle of the anisotropic meta-atoms. This design is numerically demonstrated at Ku band (12–18 GHz) and can be further exploited for OAM multiplexing in the communication systems.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"10 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":"126943457","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.2018.8563350
W. Cao, Shaoyu Zheng, Yiyu Lin, Jinxin Li, Si-min Li
A novel slotted cavity-backed patch antenna with defected ground structure (DGS) is proposed in this paper. This slotted cavity-backed antenna is composed of a square patch with a metal square-loop as radiator, a cross-shaped slotted square patch as defected ground structure (DGS) and a metal backed-cavity. Both of the square patch and metal square-loop have four square slots. Simulated results shows that the impedance bandwidth with a return loss better than l0dB is 6MHz at 420MHz and the impedance bandwidth is MHz at 480MHz. The antenna exhibits stable radiation pattern over the operation frequency band. The profile and size of the proposed RHCP antenna are 1.0mm (0.00lλ0) and $mathbf{77mmtimes 77 mm(0.12lambda_0}times 0.12lambda_0)$, both of which are extremely small.
{"title":"A Novel Slotted Cavity-Backed Patch Antenna for Dual-Band UHF Applications","authors":"W. Cao, Shaoyu Zheng, Yiyu Lin, Jinxin Li, Si-min Li","doi":"10.1109/ICMMT.2018.8563350","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563350","url":null,"abstract":"A novel slotted cavity-backed patch antenna with defected ground structure (DGS) is proposed in this paper. This slotted cavity-backed antenna is composed of a square patch with a metal square-loop as radiator, a cross-shaped slotted square patch as defected ground structure (DGS) and a metal backed-cavity. Both of the square patch and metal square-loop have four square slots. Simulated results shows that the impedance bandwidth with a return loss better than l0dB is 6MHz at 420MHz and the impedance bandwidth is MHz at 480MHz. The antenna exhibits stable radiation pattern over the operation frequency band. The profile and size of the proposed RHCP antenna are 1.0mm (0.00lλ0) and $mathbf{77mmtimes 77 mm(0.12lambda_0}times 0.12lambda_0)$, both of which are extremely small.","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":"131017546","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.2018.8563346
Qianyun Lu, Chao Yu, N. Yang, F. Meng, Jixin Chen, Xiaowei Zhu
This paper proposes a novel configurable digital predistorter for the linearization of single-band (SB)/dual-band (DB) power amplifiers (PAs) with multiple working modes. The proposed method can provide random combinations of linearization performance for single-band and dual-band modes, and thus lead to the flexible resource saving. Experiments have been conducted by using a GaN Doherty PA to validate the proposed idea, which is excited by two 20 MHz OFDM signals in SB and DB modes at the center frequency of 2.25 GHz and 2.45 GHz, respectively.
{"title":"A Configurable Multi-Mode Digital Predistorter for Single-Band/Dual-Band RF Power Amplifiers With Economic Resource Consumption","authors":"Qianyun Lu, Chao Yu, N. Yang, F. Meng, Jixin Chen, Xiaowei Zhu","doi":"10.1109/ICMMT.2018.8563346","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563346","url":null,"abstract":"This paper proposes a novel configurable digital predistorter for the linearization of single-band (SB)/dual-band (DB) power amplifiers (PAs) with multiple working modes. The proposed method can provide random combinations of linearization performance for single-band and dual-band modes, and thus lead to the flexible resource saving. Experiments have been conducted by using a GaN Doherty PA to validate the proposed idea, which is excited by two 20 MHz OFDM signals in SB and DB modes at the center frequency of 2.25 GHz and 2.45 GHz, respectively.","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":"132879874","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.2018.8563889
Baidenger Agyekum Twumasi, Liao Jia-Lin
Microwave based imaging has been extensively examined for biomedical imaging and research is still ongoing to attain best imaging systems. Examination and detection of dielectric property differences of biological tissues has been examined over a wide range of frequencies for such applications. This paper looks at the design of a wide dual band Bowtie time reversal mirror (TRM) for biomedical imaging using electromagnetic time reversal technique resonating at 2.45 GHz and 5.2 GHz.
{"title":"Bowtie Antenna TRM Design for Biomedical Imaging Using Electromagnetic Time Reversal Technique","authors":"Baidenger Agyekum Twumasi, Liao Jia-Lin","doi":"10.1109/ICMMT.2018.8563889","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563889","url":null,"abstract":"Microwave based imaging has been extensively examined for biomedical imaging and research is still ongoing to attain best imaging systems. Examination and detection of dielectric property differences of biological tissues has been examined over a wide range of frequencies for such applications. This paper looks at the design of a wide dual band Bowtie time reversal mirror (TRM) for biomedical imaging using electromagnetic time reversal technique resonating at 2.45 GHz and 5.2 GHz.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"15 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":"125214007","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.2018.8563933
Jun Tang, Wei‐Jun Chen, Jun-Jie Yang, Qi-Yuan Zhu, W. Shao
Ahstract-A high-order (HO) finite-difference time-domain (FDTD) method with exponential time differencing (ETD) algorithm is proposed to model electromagnetic wave propagation in dispersive material with high dielectric constant in this paper. The proposed method introduces an auxiliary difference equation (ADE) technique which establishes the relationship between the electric displacement vector and electric field intensity with a differential equation in high dielectric dispersive media. The ETD algorithm applies to the displacement vector and auxiliary difference variable in time domain and the fourth-order central-difference discretization is used in space domain. One example with plane wave propagation in a high dielectric dispersive media is calculated. Compared with the conventional ETD-FDTD method, the results from our proposed method show its accuracy and efficiency for high dielectric dispersive media simulation.
{"title":"Modeling High Dielectric Material in the High-Order FDTD Using Exponential Time Differencing Algorithm","authors":"Jun Tang, Wei‐Jun Chen, Jun-Jie Yang, Qi-Yuan Zhu, W. Shao","doi":"10.1109/ICMMT.2018.8563933","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563933","url":null,"abstract":"Ahstract-A high-order (HO) finite-difference time-domain (FDTD) method with exponential time differencing (ETD) algorithm is proposed to model electromagnetic wave propagation in dispersive material with high dielectric constant in this paper. The proposed method introduces an auxiliary difference equation (ADE) technique which establishes the relationship between the electric displacement vector and electric field intensity with a differential equation in high dielectric dispersive media. The ETD algorithm applies to the displacement vector and auxiliary difference variable in time domain and the fourth-order central-difference discretization is used in space domain. One example with plane wave propagation in a high dielectric dispersive media is calculated. Compared with the conventional ETD-FDTD method, the results from our proposed method show its accuracy and efficiency for high dielectric dispersive media simulation.","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":"131266674","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.2018.8563367
Z. Fu, D. Jiang, Tianliang Zhang, Yupeng Liu, Xiang Li
In this paper, based on liquid crystal anisotropy characteristics, a kind of frequency reconfigurable comb substrate integrate waveguide slot leaky-wave antenna use liquid-crystal-based is proposed at Ku band. It adopt comb shape and defected ground structure to compose comb SIW's top and bottom. The slots are etched at top and bottom surface. The resonant point of propose antenna move from 15.85GHz to 14.37GHz, the tunable range is 1.5GHz by changing liquid crystal's permittivity. Return loss less than -30dB at resonant point and the maximum gain is 8.79dB. The bandwidth of proposed antenna is 1 GHz. All the results show the reconfigurable of proposed antenna is good.
{"title":"Ku-Band Liquid-Crystal-Based Frequency Reconfigurable Comb SIW Slot Leaky-Wave Antenna","authors":"Z. Fu, D. Jiang, Tianliang Zhang, Yupeng Liu, Xiang Li","doi":"10.1109/ICMMT.2018.8563367","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563367","url":null,"abstract":"In this paper, based on liquid crystal anisotropy characteristics, a kind of frequency reconfigurable comb substrate integrate waveguide slot leaky-wave antenna use liquid-crystal-based is proposed at Ku band. It adopt comb shape and defected ground structure to compose comb SIW's top and bottom. The slots are etched at top and bottom surface. The resonant point of propose antenna move from 15.85GHz to 14.37GHz, the tunable range is 1.5GHz by changing liquid crystal's permittivity. Return loss less than -30dB at resonant point and the maximum gain is 8.79dB. The bandwidth of proposed antenna is 1 GHz. All the results show the reconfigurable of proposed antenna is good.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"19 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":"116008219","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.2018.8563843
Q. Xue, J. Y. Jin, B. Zhang
This paper presents the two filtering antennas. One (type-A) is to design an antenna, which simultaneously realizes the filtering performance. The other one (type-B) is from a filter to design an antenna. The type-A filtering antenna obtained a high selectivity by etching slots on a single patch. The radiation nulls can be controlled individually. On the other hand, the high selectivity of type-B filtering antenna's boresight gain response was achieved by a novel coupling scheme, which induces additional coupling between source/load and non-adjacent resonators to construct cross-coupling paths. For demonstration, two filtering antennas are designed.
{"title":"From Antenna to Filter or from Filter to Antenna","authors":"Q. Xue, J. Y. Jin, B. Zhang","doi":"10.1109/ICMMT.2018.8563843","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563843","url":null,"abstract":"This paper presents the two filtering antennas. One (type-A) is to design an antenna, which simultaneously realizes the filtering performance. The other one (type-B) is from a filter to design an antenna. The type-A filtering antenna obtained a high selectivity by etching slots on a single patch. The radiation nulls can be controlled individually. On the other hand, the high selectivity of type-B filtering antenna's boresight gain response was achieved by a novel coupling scheme, which induces additional coupling between source/load and non-adjacent resonators to construct cross-coupling paths. For demonstration, two filtering antennas are designed.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"148 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":"123394948","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 : 2018-05-06DOI: 10.1109/ICMMT.2018.8563533
Changyou Li, D. Lesselier, Y. Zhong, Zicheng Liu
Ahstract-A full-wave computational model for electromagnetic scattering of conically incident plane waves with arbitrary polarization is proposed for a multilayered structure (laminate) made of dielectric slabs wherein periodically arranged circular cylinders are embedded. An electric field is considered as the incident wave with arbitrary polarization. The magnetic field produced by the incident wave is obtained with Maxwell's equations. Both the transverse electric and magnetic field components are used for mode-matching at the boundary for calculating the scattering matrices. Power reflection and transmission coefficients follow from Poynting's theorem. This work is a first step toward the Green's function of the structure, in view of imaging a possibly damaged laminate.
{"title":"Full-Wave Model of 3D Scattering by a Fibered Laminate","authors":"Changyou Li, D. Lesselier, Y. Zhong, Zicheng Liu","doi":"10.1109/ICMMT.2018.8563533","DOIUrl":"https://doi.org/10.1109/ICMMT.2018.8563533","url":null,"abstract":"Ahstract-A full-wave computational model for electromagnetic scattering of conically incident plane waves with arbitrary polarization is proposed for a multilayered structure (laminate) made of dielectric slabs wherein periodically arranged circular cylinders are embedded. An electric field is considered as the incident wave with arbitrary polarization. The magnetic field produced by the incident wave is obtained with Maxwell's equations. Both the transverse electric and magnetic field components are used for mode-matching at the boundary for calculating the scattering matrices. Power reflection and transmission coefficients follow from Poynting's theorem. This work is a first step toward the Green's function of the structure, in view of imaging a possibly damaged laminate.","PeriodicalId":190601,"journal":{"name":"2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"84 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131762236","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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