Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329994
Abdul-Sattar Kaddour, C. A. Velez, S. Georgakopoulos
This paper presents a novel origami reflectarray unit-cell based on the Miura-Ori pattern. This origami unit-cell allows for efficient folding/unfolding, high packing efficiency and easy deployment. The unit-cell is composed of 4 parallelogram patches that can achieve 560° phase shift. A 20 × 20 element Miura-Ori reflectarray is optimized and designed to radiate a beam toward direction θ=20° and φ=0° at 8.425 GHz. A maximum realized gain of 26 dBi is obtained. The proposed antenna's main advantage is its ability to efficiently pack itself at its fully folded state to occupy 4 to 5 times smaller volume than the one at its fully deployed state. This is very important for small satellite applications.
{"title":"A Deployable and Reconfigurable Origami Reflectarray Based on the Miura-Ori Pattern","authors":"Abdul-Sattar Kaddour, C. A. Velez, S. Georgakopoulos","doi":"10.1109/IEEECONF35879.2020.9329994","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329994","url":null,"abstract":"This paper presents a novel origami reflectarray unit-cell based on the Miura-Ori pattern. This origami unit-cell allows for efficient folding/unfolding, high packing efficiency and easy deployment. The unit-cell is composed of 4 parallelogram patches that can achieve 560° phase shift. A 20 × 20 element Miura-Ori reflectarray is optimized and designed to radiate a beam toward direction θ=20° and φ=0° at 8.425 GHz. A maximum realized gain of 26 dBi is obtained. The proposed antenna's main advantage is its ability to efficiently pack itself at its fully folded state to occupy 4 to 5 times smaller volume than the one at its fully deployed state. This is very important for small satellite 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":"130936671","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/IEEECONF35879.2020.9329819
Ying Chen, R. Vaughan
This paper extends our previous design of dual-polarized crossed slot element to an array configuration. The radiating elements are crossed slots on the ground plane with simple symmetric stripline feed on both sides. A reflector is placed at the back of the array to enhance the forward radiation. A design of a $2times 2$ planar crossed slot array is presented. Simulation demonstrates a gain of around 15 dBi and −10 dB impedance bandwidth of about 16%. The isolation between two ports is less than −34 dB across the band. The results indicate our existing cross slot design can be extended to array configurations for higher gains while maintaining its good isolation and bandwidth.
{"title":"Low-Cost Dual-Polarized Crossed Slot Array","authors":"Ying Chen, R. Vaughan","doi":"10.1109/IEEECONF35879.2020.9329819","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329819","url":null,"abstract":"This paper extends our previous design of dual-polarized crossed slot element to an array configuration. The radiating elements are crossed slots on the ground plane with simple symmetric stripline feed on both sides. A reflector is placed at the back of the array to enhance the forward radiation. A design of a $2times 2$ planar crossed slot array is presented. Simulation demonstrates a gain of around 15 dBi and −10 dB impedance bandwidth of about 16%. The isolation between two ports is less than −34 dB across the band. The results indicate our existing cross slot design can be extended to array configurations for higher gains while maintaining its good isolation and bandwidth.","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":"132929505","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/IEEECONF35879.2020.9329463
Alexandra Ford
This paper presents the design, prototyping, and testing of an S-Band conformal array on a partial wing surface. The array elements are series fed microstrip patch antennas fabricated entirely through additive manufacturing (AM) technology using a combination of fused deposition modeling and thermal spray. A robust material set of ULTEM 9085 and copper alloy is used for a good balance of mechanical/environmental robustness and RF performance, while also offering a viable path forward for a future fielded design. The focus of this paper is on AM multi-material fabrication, fundamental print settings and material characterization, and antenna testing. AM characterization coupons are utilized to improve the accuracy of the RF antenna model, which showed excellent agreement with the prototype measurements.
{"title":"Prototyping an S-Band Conformal Line Array Antenna on a Partial Wing Surface","authors":"Alexandra Ford","doi":"10.1109/IEEECONF35879.2020.9329463","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329463","url":null,"abstract":"This paper presents the design, prototyping, and testing of an S-Band conformal array on a partial wing surface. The array elements are series fed microstrip patch antennas fabricated entirely through additive manufacturing (AM) technology using a combination of fused deposition modeling and thermal spray. A robust material set of ULTEM 9085 and copper alloy is used for a good balance of mechanical/environmental robustness and RF performance, while also offering a viable path forward for a future fielded design. The focus of this paper is on AM multi-material fabrication, fundamental print settings and material characterization, and antenna testing. AM characterization coupons are utilized to improve the accuracy of the RF antenna model, which showed excellent agreement with the prototype measurements.","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":"133054335","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/IEEECONF35879.2020.9330025
Yankai Ma, Shiwen Yang, S. Qu, Yikai Chen, Jun Hu, P. Rocca
A method for the design of 4D tiled arrays based on mixed integer second order cone programming (MISOCP) is presented. The method guarantees to simultaneously achieve the maximum directivity and lowest sidelobe level by exploiting the convexity of the problem with respect to the subarray weights and transforming the non-convex clustering problem into a convex one. Numerical simulations show that the reduction of directivity is only 3.77dB with up to 75% reduction in number of transmit/receive (T /R) modules when scanning to 30° for E/H plane as compared with conventional fully-populated Taylor array.
{"title":"Design of 4D Irregular Tiled Arrays Based on Mixed Integer Second Order Cone Programming","authors":"Yankai Ma, Shiwen Yang, S. Qu, Yikai Chen, Jun Hu, P. Rocca","doi":"10.1109/IEEECONF35879.2020.9330025","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330025","url":null,"abstract":"A method for the design of 4D tiled arrays based on mixed integer second order cone programming (MISOCP) is presented. The method guarantees to simultaneously achieve the maximum directivity and lowest sidelobe level by exploiting the convexity of the problem with respect to the subarray weights and transforming the non-convex clustering problem into a convex one. Numerical simulations show that the reduction of directivity is only 3.77dB with up to 75% reduction in number of transmit/receive (T /R) modules when scanning to 30° for E/H plane as compared with conventional fully-populated Taylor array.","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":"133492569","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/IEEECONF35879.2020.9330012
Oscar Céspedes Vicente, C. Caloz
We present a method to generate arbitrary free-space Bessel beams and particularly Non-Integer Cylindrical-Vectorial Bessel Beams (NI-CV-BBs). This method follows from a novel and insightful mathematical representation of NI-CV-BBs. It consists in distributing sources with prescribed conical angular spectrum and azimuthal phase distribution along a circle perpendicular to the axis of the desired beam. This construction is numerically demonstrated and we shall present at the conference an experimental realization of it in the form of a pair of cascaded inhomogeneous wave-plate metasurfaces.
{"title":"Generation of Free-Space Cylindrical Bessel Beams of Arbitrary Integer/Non-Integer Orders","authors":"Oscar Céspedes Vicente, C. Caloz","doi":"10.1109/IEEECONF35879.2020.9330012","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330012","url":null,"abstract":"We present a method to generate arbitrary free-space Bessel beams and particularly Non-Integer Cylindrical-Vectorial Bessel Beams (NI-CV-BBs). This method follows from a novel and insightful mathematical representation of NI-CV-BBs. It consists in distributing sources with prescribed conical angular spectrum and azimuthal phase distribution along a circle perpendicular to the axis of the desired beam. This construction is numerically demonstrated and we shall present at the conference an experimental realization of it in the form of a pair of cascaded inhomogeneous wave-plate metasurfaces.","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":"133496017","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/IEEECONF35879.2020.9330481
M. Laribi, T. Elkarkraoui, N. Hakem
In this paper, a compact, high gain, and circularly polarized patch antenna array design is proposed. The proposed structure is destined for the 5G wireless communications systems operating at 28 GHz band. The proposed antenna structure uses a loaded dielectric hemisphere Lens to focalize electromagnetic energy and enhance the gain. Simulation results shows that the antenna design covers about 0.5 GHz of bandwidth $(mathrm{S11} <-10 mathrm{dB})$ while delivering high gain of 15.3 dBi and an axial-ratio bandwidth $(mathrm{AR} < 3 mathrm{dB})$ of 0.35 GHz.
{"title":"Hight-Gain Circulary Polarised Patch Antenna Array At 28 GHz","authors":"M. Laribi, T. Elkarkraoui, N. Hakem","doi":"10.1109/IEEECONF35879.2020.9330481","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330481","url":null,"abstract":"In this paper, a compact, high gain, and circularly polarized patch antenna array design is proposed. The proposed structure is destined for the 5G wireless communications systems operating at 28 GHz band. The proposed antenna structure uses a loaded dielectric hemisphere Lens to focalize electromagnetic energy and enhance the gain. Simulation results shows that the antenna design covers about 0.5 GHz of bandwidth $(mathrm{S11} <-10 mathrm{dB})$ while delivering high gain of 15.3 dBi and an axial-ratio bandwidth $(mathrm{AR} < 3 mathrm{dB})$ of 0.35 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":"133550067","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/IEEECONF35879.2020.9330182
A. Vallecchi
An arrangement of three-dimensionally isotropic high index metamaterials composed of modified metallic crosses that are extended beyond a single unit cell to form an interleaved configuration with the arms of the crosses from all adjacent unit cells is developed. It is shown that at greater degrees of interleaving of the cross elements the metamaterials exhibit increasingly larger effective refractive indices at increasing miniaturization of the unit cell. The symmetry of the structure ensures that a polarization and propagation angle insensitive effective index is attained. Fabrication of the metamaterial is addressed by fused filament fabrication (FFF) 3D printing.
{"title":"3D Isotropic High Index Interleaved Metamaterials Realized by Additive Manufacturing","authors":"A. Vallecchi","doi":"10.1109/IEEECONF35879.2020.9330182","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330182","url":null,"abstract":"An arrangement of three-dimensionally isotropic high index metamaterials composed of modified metallic crosses that are extended beyond a single unit cell to form an interleaved configuration with the arms of the crosses from all adjacent unit cells is developed. It is shown that at greater degrees of interleaving of the cross elements the metamaterials exhibit increasingly larger effective refractive indices at increasing miniaturization of the unit cell. The symmetry of the structure ensures that a polarization and propagation angle insensitive effective index is attained. Fabrication of the metamaterial is addressed by fused filament fabrication (FFF) 3D printing.","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":"133674683","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/IEEECONF35879.2020.9330157
Bo Cheng, Zhengwei Du
A low-profile and broadband microstrip antenna with stable gain is proposed and studied. The radiation patch of the proposed antenna is shorted by two rows of shorting pins and is divided into six pieces by three slots. The antenna is fed by a microstrip line through a slot cut on the ground. Two resonance modes with broadside radiation are excited simultaneously. The proposed antenna achieves a broad operating band of 4.05-5.86 GHz and the relative bandwidth of 36.5% with a profile of 0.06 λ0 (λ0 is the center operating wavelength in the free space). It has an extremely stable gain of 5.7-6.5 dBi and stable radiation patterns without null in the operating band.
{"title":"A Broadband Microstrip Antenna with Stable Gain","authors":"Bo Cheng, Zhengwei Du","doi":"10.1109/IEEECONF35879.2020.9330157","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330157","url":null,"abstract":"A low-profile and broadband microstrip antenna with stable gain is proposed and studied. The radiation patch of the proposed antenna is shorted by two rows of shorting pins and is divided into six pieces by three slots. The antenna is fed by a microstrip line through a slot cut on the ground. Two resonance modes with broadside radiation are excited simultaneously. The proposed antenna achieves a broad operating band of 4.05-5.86 GHz and the relative bandwidth of 36.5% with a profile of 0.06 λ0 (λ0 is the center operating wavelength in the free space). It has an extremely stable gain of 5.7-6.5 dBi and stable radiation patterns without null in the operating band.","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":"132268860","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/IEEECONF35879.2020.9330116
L. Shafai, S. Sharma, C. Shafai
This Paper presents the pioneering contributions of Pedram Mousavi and Mojgan Daneshmand to antenna engineering, during their graduate programs at University of Manitoba. Their research covered two different aspects of antenna theory and design, but effort is made here to combine them under a unified topic of antenna “miniaturization and adaptive aperture antennas”. As such, the term miniaturization is meant to represent the miniaturization of the antenna geometry, for an isolated element, and total hardware miniaturization, for a large complex system of reflector antennas and phased arrays.
{"title":"Antenna Miniaturization and Adaptive Aperture Antennas","authors":"L. Shafai, S. Sharma, C. Shafai","doi":"10.1109/IEEECONF35879.2020.9330116","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330116","url":null,"abstract":"This Paper presents the pioneering contributions of Pedram Mousavi and Mojgan Daneshmand to antenna engineering, during their graduate programs at University of Manitoba. Their research covered two different aspects of antenna theory and design, but effort is made here to combine them under a unified topic of antenna “miniaturization and adaptive aperture antennas”. As such, the term miniaturization is meant to represent the miniaturization of the antenna geometry, for an isolated element, and total hardware miniaturization, for a large complex system of reflector antennas and phased arrays.","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":"133747888","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/IEEECONF35879.2020.9329559
Wei Li, H. Qian, Xun Luo
In this paper, a low-profile 21.6-45 GHz printed $1times 4$ antenna array with high gain and efficiency is presented. Such antenna array is composed of an in-phase 1:4 power divider and four slot antenna elements. Each antenna element fed by the $50 Omega$ microstrip input/output (I/O) port consists of a C-shaped slotline and two ring slots with embedded defected ground structure (DGS). Multiple resonances are introduced by the proposed structure to achieve a wide operation bandwidth. To verify the mechanism mentioned above, a wideband slot antenna array is implemented and fabricated with a compact size of $28times 40times 0.254 text{mm}^{3}$. The measured result exhibits a 70.3% impedance bandwidth operating from 21.6 to 45 GHz. With such high performance, the proposed wideband antenna array can be a good candidate for 5G communication systems.
{"title":"A 21.6-45 GHz Low-Profile Wideband Slot Antenna Array for 5G Wireless","authors":"Wei Li, H. Qian, Xun Luo","doi":"10.1109/IEEECONF35879.2020.9329559","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329559","url":null,"abstract":"In this paper, a low-profile 21.6-45 GHz printed $1times 4$ antenna array with high gain and efficiency is presented. Such antenna array is composed of an in-phase 1:4 power divider and four slot antenna elements. Each antenna element fed by the $50 Omega$ microstrip input/output (I/O) port consists of a C-shaped slotline and two ring slots with embedded defected ground structure (DGS). Multiple resonances are introduced by the proposed structure to achieve a wide operation bandwidth. To verify the mechanism mentioned above, a wideband slot antenna array is implemented and fabricated with a compact size of $28times 40times 0.254 text{mm}^{3}$. The measured result exhibits a 70.3% impedance bandwidth operating from 21.6 to 45 GHz. With such high performance, the proposed wideband antenna array can be a good candidate for 5G communication 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":"124150177","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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