Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330055
Fahad Ahmed, Iqra Aitbar, S. M. A. Shah, I. Shoaib, N. Shoaib
The study presents simulation and analyses of a multifunctional single layer metasurface performing both linear and circular polarization conversion. The unit cell of the metasurface comprises of tilted umbrella shape with a slit in it achieving both linear and circular polarization conversion in frequency bands of (10.34-10.57 GHz and 13.53-16.98 GHz) and (10.14-10.219 GHz, 10.84-12.55 GHz and 18.12-18.98 GHz) respectively with more than 90% efficiency. The overall optimized structure of the unit cell results in a stable response for oblique incidence angle up to 45° both for both operations. The proposed metasurface offers a simple planar structure, with compact size and angular stability and is thus suitable for various applications like microwave filtering, satellite communication and polarization conversion devices.
{"title":"A Wide-Band Metasurface with Wide Angle Polarization Conversion","authors":"Fahad Ahmed, Iqra Aitbar, S. M. A. Shah, I. Shoaib, N. Shoaib","doi":"10.1109/IEEECONF35879.2020.9330055","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330055","url":null,"abstract":"The study presents simulation and analyses of a multifunctional single layer metasurface performing both linear and circular polarization conversion. The unit cell of the metasurface comprises of tilted umbrella shape with a slit in it achieving both linear and circular polarization conversion in frequency bands of (10.34-10.57 GHz and 13.53-16.98 GHz) and (10.14-10.219 GHz, 10.84-12.55 GHz and 18.12-18.98 GHz) respectively with more than 90% efficiency. The overall optimized structure of the unit cell results in a stable response for oblique incidence angle up to 45° both for both operations. The proposed metasurface offers a simple planar structure, with compact size and angular stability and is thus suitable for various applications like microwave filtering, satellite communication and polarization conversion devices.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124471354","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329522
Abdulrahman Aljurbua, H. Shaman, K. Sarabandi
This papers presents a fast full-wave method for generating data in bistatic subsurface SAR. The method considers a fix transmitter, a fixed target and a moving receiver that samples the scattered field. The method works by illuminating the target by the transmitter (in the absence of the receiver) and saving the resultant current distribution on the surface of the target. After that, the receiver is excited (in the absence of the target and the transmitter) and its field in the lower half space is saved. Reciprocity is then used to relate the voltage across the receiver terminals to the target current distribution and the field in the lower half space due to the receiver. Following this approach leads to a reduction in data generation time by a factor of $N/2$ where $N$ is the number of the samples required in the SAR simulation. The proposed method is evaluated by comparing the data it generates with the data generated by the brute-force full numerical approach.
{"title":"A Fast Full-Wave Data Generation Method for Bistatic Subsurface SAR","authors":"Abdulrahman Aljurbua, H. Shaman, K. Sarabandi","doi":"10.1109/IEEECONF35879.2020.9329522","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329522","url":null,"abstract":"This papers presents a fast full-wave method for generating data in bistatic subsurface SAR. The method considers a fix transmitter, a fixed target and a moving receiver that samples the scattered field. The method works by illuminating the target by the transmitter (in the absence of the receiver) and saving the resultant current distribution on the surface of the target. After that, the receiver is excited (in the absence of the target and the transmitter) and its field in the lower half space is saved. Reciprocity is then used to relate the voltage across the receiver terminals to the target current distribution and the field in the lower half space due to the receiver. Following this approach leads to a reduction in data generation time by a factor of $N/2$ where $N$ is the number of the samples required in the SAR simulation. The proposed method is evaluated by comparing the data it generates with the data generated by the brute-force full numerical approach.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127758150","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330396
K. Esselle
This paper serves as the introductory first presentation to the 2020 IEEE AP-S Industry-Focused Special Session on “Beam-Steerable Antenna Systems with High Gains for Mobile Satellite Terminals”. It presents a brief overview of established and emerging antenna technologies for Communication-On- The-Move (COTM) mobile satellite communication terminals and known or expected advantages and limitations of each technology.
{"title":"A Brief Overview of Antenna Technologies for Communications-On- The-Move Satellite Communication Mobile Terminals","authors":"K. Esselle","doi":"10.1109/IEEECONF35879.2020.9330396","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330396","url":null,"abstract":"This paper serves as the introductory first presentation to the 2020 IEEE AP-S Industry-Focused Special Session on “Beam-Steerable Antenna Systems with High Gains for Mobile Satellite Terminals”. It presents a brief overview of established and emerging antenna technologies for Communication-On- The-Move (COTM) mobile satellite communication terminals and known or expected advantages and limitations of each technology.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126379626","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330252
Divya Krishnan, A. Alphones
A meander line phase shifter based on liquid crystal (LC) material is used to electronically steer beam of an antenna arraydesigned for ka-band. Based on biasing voltage applied on LC based meander line phase shifter, phases can be adjusted for antenna elements to steer the main beam in the desired directions. For theexample of a $mathbf{1}times mathbf{4}$ array antenna with LC based meander line phase shifters, the main beam can be steered in the range of $pm mathbf{17}^{mathbf{o}}$.
{"title":"Liquid Crystal Material based Electronically Beam Steering Antenna at Ka-band for 5G Applications","authors":"Divya Krishnan, A. Alphones","doi":"10.1109/IEEECONF35879.2020.9330252","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330252","url":null,"abstract":"A meander line phase shifter based on liquid crystal (LC) material is used to electronically steer beam of an antenna arraydesigned for ka-band. Based on biasing voltage applied on LC based meander line phase shifter, phases can be adjusted for antenna elements to steer the main beam in the desired directions. For theexample of a $mathbf{1}times mathbf{4}$ array antenna with LC based meander line phase shifters, the main beam can be steered in the range of $pm mathbf{17}^{mathbf{o}}$.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126548020","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329900
Donghyun Kim, Sung Hoe Kim, Seung Gook Cha, Y. Yoon, B. Jang
In this paper, novel direction finding method based on deep neural network (DNN) and time modulation is proposed for resolution improvement. The proposed method has fast estimation time and simple system compared to the conventional method. The resolution improvement by the time modulation and DNN is three times higher than the previously studied method. In addition to, through an experiment, the proposed method has been validated to have higher resolution and similar accuracy.
{"title":"DNN-based Direction Finding by Time Modulation","authors":"Donghyun Kim, Sung Hoe Kim, Seung Gook Cha, Y. Yoon, B. Jang","doi":"10.1109/IEEECONF35879.2020.9329900","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329900","url":null,"abstract":"In this paper, novel direction finding method based on deep neural network (DNN) and time modulation is proposed for resolution improvement. The proposed method has fast estimation time and simple system compared to the conventional method. The resolution improvement by the time modulation and DNN is three times higher than the previously studied method. In addition to, through an experiment, the proposed method has been validated to have higher resolution and similar accuracy.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128022979","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329840
Jinqun Ge, Guoan Wang
This paper presents a novel engineered substrate enabled by patterned Permalloy (Ni80Fe20, Py) thin films for the development of miniaturized antenna with improved bandwidth. The perspective substrate is implemented with multiple layers of 100 nm thick Py thin film patterns embedded on arbitrary microwave substrate, and each Py layer consists of an array of Py patterns with a dimension of $15mumathrm{m}times 40mumathrm{m}$ and $5 mumathrm{m}$ gaps among them to suppress the magnetic loss. An equivalent permeability of 2.398 is achieved for engineered substrate embedding with 10 layers of Py thin films. A simple patch antenna has been implemented on the engineered substrate to demonstrate the efficacy of designing miniaturized antenna with improved bandwidth, compared to antenna on regular substrate, results show that the developed antenna on engineered substrate has a size reduction of 47.3% and an improved bandwidth of 49.6%.
本文提出了一种新型的工程衬底，该衬底由图案化的坡莫合金(Ni80Fe20, Py)薄膜实现，用于开发具有改进带宽的小型化天线。透视衬底是在任意微波衬底上嵌入多层100 nm厚的Py薄膜图案来实现的，每层Py由一个尺寸为$15mu mathm {m}$乘以40mu mathm {m}$和$5 mu mathm {m}$间隙的Py图案阵列组成，以抑制磁损耗。在工程衬底中嵌入10层Py薄膜，其等效磁导率为2.398。为了验证小型化天线的设计效果，我们在工程基板上实现了一个简单的贴片天线，与常规基板上的天线相比，研究结果表明，在工程基板上设计的天线尺寸减小了47.3%，带宽提高了49.6%。
{"title":"Thin Film Enabled Engineered Substrate for Miniaturized Antennas with Improved Bandwidth","authors":"Jinqun Ge, Guoan Wang","doi":"10.1109/IEEECONF35879.2020.9329840","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329840","url":null,"abstract":"This paper presents a novel engineered substrate enabled by patterned Permalloy (Ni80Fe20, Py) thin films for the development of miniaturized antenna with improved bandwidth. The perspective substrate is implemented with multiple layers of 100 nm thick Py thin film patterns embedded on arbitrary microwave substrate, and each Py layer consists of an array of Py patterns with a dimension of $15mumathrm{m}times 40mumathrm{m}$ and $5 mumathrm{m}$ gaps among them to suppress the magnetic loss. An equivalent permeability of 2.398 is achieved for engineered substrate embedding with 10 layers of Py thin films. A simple patch antenna has been implemented on the engineered substrate to demonstrate the efficacy of designing miniaturized antenna with improved bandwidth, compared to antenna on regular substrate, results show that the developed antenna on engineered substrate has a size reduction of 47.3% and an improved bandwidth of 49.6%.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128082788","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330355
S. Safavi-Naeini
Prof. Pedram Mousavi has been one of my closest and dearest friends and colleagues for more than 20 years. Extremely bright, highly innovative, very hardworking, a real problem solver, unbelievably positive, and above all a sincere and dependable friend. Mix all these with an amazing sense of humor, and then you have Pedram! In this talk I want to focus on Pedram's pioneering work on low-cost/complexity phased-array technologies and his significant contributions to commercial intelligent antenna technologies. Pedram's research work had substantial impact on the current extensive research programs on modular active phased-array system architecture at the University of Waterloo Centre for Intelligent Antenna and Radio Systems.
{"title":"Pedram Mousavi - Pioneering Research on Low-Cost/Complexity Phased-Array at Waterloo","authors":"S. Safavi-Naeini","doi":"10.1109/IEEECONF35879.2020.9330355","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330355","url":null,"abstract":"Prof. Pedram Mousavi has been one of my closest and dearest friends and colleagues for more than 20 years. Extremely bright, highly innovative, very hardworking, a real problem solver, unbelievably positive, and above all a sincere and dependable friend. Mix all these with an amazing sense of humor, and then you have Pedram! In this talk I want to focus on Pedram's pioneering work on low-cost/complexity phased-array technologies and his significant contributions to commercial intelligent antenna technologies. Pedram's research work had substantial impact on the current extensive research programs on modular active phased-array system architecture at the University of Waterloo Centre for Intelligent Antenna and Radio Systems.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125260017","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330344
K. Trivedi, D. Pujara
In this paper, the design of a closely spaced two-element ultrawide band (UWB) Surya Yantra shaped dielectric resonator antenna (DRA) array is presented. Novel rectangular loop-shaped defected ground structure (DGS) is introduced to reduce mutual coupling between DR elements. Fabrication and testing of the antenna array were carried out. Measured UWB of about 101% (3.1-9.4 GHz) was achieved. Mutual coupling below -15 dB is achieved over the entire band of interest using DGS. The proposed antenna array is a prominent candidate for MIMO applications due to its low mutual coupling, 101% UWB, the average gain of about 4.4 dBi, and fairly stable radiation pattern.
{"title":"Mutual Coupling Reduction using Defected Ground Structure in UWB DRA Array for MIMO Application","authors":"K. Trivedi, D. Pujara","doi":"10.1109/IEEECONF35879.2020.9330344","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330344","url":null,"abstract":"In this paper, the design of a closely spaced two-element ultrawide band (UWB) Surya Yantra shaped dielectric resonator antenna (DRA) array is presented. Novel rectangular loop-shaped defected ground structure (DGS) is introduced to reduce mutual coupling between DR elements. Fabrication and testing of the antenna array were carried out. Measured UWB of about 101% (3.1-9.4 GHz) was achieved. Mutual coupling below -15 dB is achieved over the entire band of interest using DGS. The proposed antenna array is a prominent candidate for MIMO applications due to its low mutual coupling, 101% UWB, the average gain of about 4.4 dBi, and fairly stable radiation pattern.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125667835","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330461
Koh Hashimoto, M. Higaki
A slotted substrate integrated waveguide (SIW) leaky-wave antenna (LWA) with a simple structure for millimeterwave security applications is proposed. The antenna is embedded in a double-sided copper clad substrate and is manufactured at low cost. The antenna is categorized as a periodic leaky-wave antenna (PLWA). The antenna is designed so that –1st order space harmonic radiates into the backward quadrant. This leads to the achievement of a wide scan angle in a limited bandwidth. The design of the antenna with 100 series radiating slots is demonstrated. The simulated beam scan angle of the designed antenna is 20.4 degrees over the bandwidth from 77 GHz to 81 GHz.
{"title":"Substrate Integrated Waveguide Leaky-Wave Antenna with Longitudinal Slots for Millimeter-Wave Security Applications","authors":"Koh Hashimoto, M. Higaki","doi":"10.1109/IEEECONF35879.2020.9330461","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330461","url":null,"abstract":"A slotted substrate integrated waveguide (SIW) leaky-wave antenna (LWA) with a simple structure for millimeterwave security applications is proposed. The antenna is embedded in a double-sided copper clad substrate and is manufactured at low cost. The antenna is categorized as a periodic leaky-wave antenna (PLWA). The antenna is designed so that –1st order space harmonic radiates into the backward quadrant. This leads to the achievement of a wide scan angle in a limited bandwidth. The design of the antenna with 100 series radiating slots is demonstrated. The simulated beam scan angle of the designed antenna is 20.4 degrees over the bandwidth from 77 GHz to 81 GHz.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125734928","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330501
Jianlin Zhang, Zheng Jiang, Bo Yuan, Yuanyue Guo, Dongjin Wang
A method for improving the detection efficiency of Microwave Staring Correlated Imaging (MSCI) is proposed in this paper. Via the judgment from Gram-Schmidt Orthogonalization and the process of expanded selection, a refined collection of feasible independent radiation fields are picked out from huge amount of original radiation fields, ensuring that the imaging matrix keeps a full rank property at the same time. Numerical imaging results based on the selected radiation fields demonstrate that the proposed method effectively improves the detection efficiency of MSCI, which makes MSCI better applied in fast imaging applications.
{"title":"Method for Improving Detection Efficiency of Microwave Staring Correlated Imaging","authors":"Jianlin Zhang, Zheng Jiang, Bo Yuan, Yuanyue Guo, Dongjin Wang","doi":"10.1109/IEEECONF35879.2020.9330501","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330501","url":null,"abstract":"A method for improving the detection efficiency of Microwave Staring Correlated Imaging (MSCI) is proposed in this paper. Via the judgment from Gram-Schmidt Orthogonalization and the process of expanded selection, a refined collection of feasible independent radiation fields are picked out from huge amount of original radiation fields, ensuring that the imaging matrix keeps a full rank property at the same time. Numerical imaging results based on the selected radiation fields demonstrate that the proposed method effectively improves the detection efficiency of MSCI, which makes MSCI better applied in fast imaging applications.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127904187","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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