Pub Date : 2014-07-06DOI: 10.1109/APS.2014.6904835
X. Duan, Rong-Lin Li
A novel center-fed Global Navigation Satellite System (GNSS) antenna is proposed in this paper. The antenna is composed of two layers of microstrip patches, a folded ground plane and three choke rings. Simulated and measured results show that two frequency bands for return loss >10 dB cover GPS L2 (1.193~1.247 GHz) and GPS L1 (1.545~1.625 GHz) with good axial ratio (AR) performance. The radiation patterns with AR<;3 dB cover the whole half upper space and the forward to backward ratio (FBR) is higher than 30 dB in the operating bands. The antenna is suitable for GNSS applications.
{"title":"A novel center-fed dual-band circularly polarized antenna for GNSS applications","authors":"X. Duan, Rong-Lin Li","doi":"10.1109/APS.2014.6904835","DOIUrl":"https://doi.org/10.1109/APS.2014.6904835","url":null,"abstract":"A novel center-fed Global Navigation Satellite System (GNSS) antenna is proposed in this paper. The antenna is composed of two layers of microstrip patches, a folded ground plane and three choke rings. Simulated and measured results show that two frequency bands for return loss >10 dB cover GPS L2 (1.193~1.247 GHz) and GPS L1 (1.545~1.625 GHz) with good axial ratio (AR) performance. The radiation patterns with AR<;3 dB cover the whole half upper space and the forward to backward ratio (FBR) is higher than 30 dB in the operating bands. The antenna is suitable for GNSS applications.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"26 1","pages":"1015-1016"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78677745","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 : 2014-07-06DOI: 10.1109/APS.2014.6904739
Lianfeng Zou, C. Caloz
We introduce the concept of a “phasenna,” which is a combination of a phaser (component providing a specified group delay versus frequency response) and an antenna. Such a device is intended for Radio Analog Signal Processing (RASP) applications where the processed signal is to be transmitted in a wireless fashion. A linear group delay (real-time spectrum analyzing) phasenna, obtained by altering a log-periodic dipole antenna (LPDA), is demonstrated to illustrate the concept.
{"title":"Concept of combined phaser-antenna - “phasenna”? - for wireless Radio Analog Signal Processing (R-ASP)","authors":"Lianfeng Zou, C. Caloz","doi":"10.1109/APS.2014.6904739","DOIUrl":"https://doi.org/10.1109/APS.2014.6904739","url":null,"abstract":"We introduce the concept of a “phasenna,” which is a combination of a phaser (component providing a specified group delay versus frequency response) and an antenna. Such a device is intended for Radio Analog Signal Processing (RASP) applications where the processed signal is to be transmitted in a wireless fashion. A linear group delay (real-time spectrum analyzing) phasenna, obtained by altering a log-periodic dipole antenna (LPDA), is demonstrated to illustrate the concept.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"1 1","pages":"822-823"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78939165","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 : 2014-07-06DOI: 10.1109/APS.2014.6904494
Sangkil Kim, M. Tentzeris, H. Aubert
In this paper, a novel inkjet-printed flexible broadband multilayer coupler on a polyimide film (Kapton) in substrate integrated waveguide (SIW) technology is implemented for the first time. A flexible broadband microstrip-to-SIW interconnect is inkjet-printed and its flexibility is tested. An inkjet-printed multilayer coupler is also demonstrated based on the flexible SIW interconnect.
{"title":"An inkjet-printed flexible broadband multilayer SIW coupler for antenna array systems","authors":"Sangkil Kim, M. Tentzeris, H. Aubert","doi":"10.1109/APS.2014.6904494","DOIUrl":"https://doi.org/10.1109/APS.2014.6904494","url":null,"abstract":"In this paper, a novel inkjet-printed flexible broadband multilayer coupler on a polyimide film (Kapton) in substrate integrated waveguide (SIW) technology is implemented for the first time. A flexible broadband microstrip-to-SIW interconnect is inkjet-printed and its flexibility is tested. An inkjet-printed multilayer coupler is also demonstrated based on the flexible SIW interconnect.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"48 1","pages":"324-325"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76306675","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 : 2014-07-06DOI: 10.1109/APS.2014.6904839
P. Nayeri, Fan Yang, A. Elsherbeni
Planar reflectarray antennas with parabolic-torus phase distribution are investigated for high-gain beam-scanning applications. Analytical expressions for the reflectarray aperture phase distribution are derived for the generalized offset configuration. A Ka-band planar reflectarray with 30 dB gain and 40 degree scan coverage is demonstrated. The study reveals that planar reflectarrays with parabolic-torus phase distribution show a momentous promise for high-gain beam-scanning.
{"title":"Offset parabolic-torus-phase reflectarray antenna","authors":"P. Nayeri, Fan Yang, A. Elsherbeni","doi":"10.1109/APS.2014.6904839","DOIUrl":"https://doi.org/10.1109/APS.2014.6904839","url":null,"abstract":"Planar reflectarray antennas with parabolic-torus phase distribution are investigated for high-gain beam-scanning applications. Analytical expressions for the reflectarray aperture phase distribution are derived for the generalized offset configuration. A Ka-band planar reflectarray with 30 dB gain and 40 degree scan coverage is demonstrated. The study reveals that planar reflectarrays with parabolic-torus phase distribution show a momentous promise for high-gain beam-scanning.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"115 1","pages":"1025-1026"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76088389","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 : 2014-07-06DOI: 10.1109/APS.2014.6905355
A. H. Panaretos, D. Brocker, D. Werner
An ultra-thin wideband absorber is proposed comprised of two cascaded layers. The first layer is a pixelized Frequency Selective Surface (FSS) engineered to exhibit the response of a series RLC circuit. The FSS is placed at a small but useful distance above a mushroom-type artificial magnetic conductor (AMC). The admittances of the two structures cancel each other resulting in an almost zero input reactance within the frequency range of interest. A -10dB return loss is achieved for normal incidence from 9-13 GHz, while the total thickness of the structure does not exceed 2 mm.
{"title":"Ultra-thin wideband absorbers comprised of pixelized Frequency Selective Surfaces","authors":"A. H. Panaretos, D. Brocker, D. Werner","doi":"10.1109/APS.2014.6905355","DOIUrl":"https://doi.org/10.1109/APS.2014.6905355","url":null,"abstract":"An ultra-thin wideband absorber is proposed comprised of two cascaded layers. The first layer is a pixelized Frequency Selective Surface (FSS) engineered to exhibit the response of a series RLC circuit. The FSS is placed at a small but useful distance above a mushroom-type artificial magnetic conductor (AMC). The admittances of the two structures cancel each other resulting in an almost zero input reactance within the frequency range of interest. A -10dB return loss is achieved for normal incidence from 9-13 GHz, while the total thickness of the structure does not exceed 2 mm.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"34 1","pages":"2056-2057"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87968823","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 : 2014-07-06DOI: 10.1109/APS.2014.6905041
J. Chalas, K. Sertel, J. Volakis
Characteristic modes are used to design a multi-antenna NVIS system on-board an electrically small UAV. By analyzing the radiation eigenmodes of the UAV platform, optimal NVIS patterns are constructed, and mounting locations which maximize desirable antenna-platform coupling are identified. The optimal NVIS pattern is then approximated using discrete monopole antennas as feeding elements. The excitation level of each feed can be inferred by relative excitation of each UAV characteristic mode in the NVIS pattern. Discussions on the pattern accuracy, bandwidth, and efficiency of this approach as a function of feeding element number will be presented.
{"title":"NVIS synthesis for electrically small aircraft using characteristic modes","authors":"J. Chalas, K. Sertel, J. Volakis","doi":"10.1109/APS.2014.6905041","DOIUrl":"https://doi.org/10.1109/APS.2014.6905041","url":null,"abstract":"Characteristic modes are used to design a multi-antenna NVIS system on-board an electrically small UAV. By analyzing the radiation eigenmodes of the UAV platform, optimal NVIS patterns are constructed, and mounting locations which maximize desirable antenna-platform coupling are identified. The optimal NVIS pattern is then approximated using discrete monopole antennas as feeding elements. The excitation level of each feed can be inferred by relative excitation of each UAV characteristic mode in the NVIS pattern. Discussions on the pattern accuracy, bandwidth, and efficiency of this approach as a function of feeding element number will be presented.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"70 1","pages":"1431-1432"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87071748","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 : 2014-07-06DOI: 10.1109/APS.2014.6904502
N. A. Estep, D. Sounas, A. Alú
Conventional non-reciprocal devices use ferromagnetic materials and an impressed external magnetic bias to break time-reversal symmetry. This solution typically leads to impractically large devices, losses and it is incompatible with integrated circuit technology. We discuss here a different approach to realize non-reciprocal microwave components and materials, based on biasing meta-molecules with the angular-momentum vector. We show that this solution can provide as large non-reciprocity and isolation as magnetically-biased ferrite components, but without their drawbacks. In particular, we present the design and realization of an integrated, magnetic-free, compact microwave circulator realized with conventional circuit components on a dielectric substrate, fully compatible with integrated circuit technology. By using appropriate spatiotemporal modulation of a magnetic-free distributed-element resonating ring, we report over 47 dB isolation and a deeply subwavelength size. We also envision the realization of non-reciprocal metasurfaces and metamaterials based on the same principle.
{"title":"Magnetic-free, fully integrated, compact microwave circulator using angular-momentum biasing","authors":"N. A. Estep, D. Sounas, A. Alú","doi":"10.1109/APS.2014.6904502","DOIUrl":"https://doi.org/10.1109/APS.2014.6904502","url":null,"abstract":"Conventional non-reciprocal devices use ferromagnetic materials and an impressed external magnetic bias to break time-reversal symmetry. This solution typically leads to impractically large devices, losses and it is incompatible with integrated circuit technology. We discuss here a different approach to realize non-reciprocal microwave components and materials, based on biasing meta-molecules with the angular-momentum vector. We show that this solution can provide as large non-reciprocity and isolation as magnetically-biased ferrite components, but without their drawbacks. In particular, we present the design and realization of an integrated, magnetic-free, compact microwave circulator realized with conventional circuit components on a dielectric substrate, fully compatible with integrated circuit technology. By using appropriate spatiotemporal modulation of a magnetic-free distributed-element resonating ring, we report over 47 dB isolation and a deeply subwavelength size. We also envision the realization of non-reciprocal metasurfaces and metamaterials based on the same principle.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"4 1","pages":"340-341"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87723217","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 : 2014-07-06DOI: 10.1109/APS.2014.6904655
A. Hammar, Y. Karandikar, Per Forsberg, A. Emrich, J. Stake
We present the design, fabrication and measurements of a smooth walled spline feed horn antenna for the satellite borne climate research instrument STEAMR operating at 340 GHz. A method has been developed which, for a certain desired beam waist, can be used to optimize the horn profile for high Gaussicity and ultra-low sidelobes. The simulated performance of the horn achieves a beam waist of 1.9 mm over the band 323-357 GHz with Gaussian coupling efficiency exceeding 98%. The peak cross-polar sidelobes are below -28 dB over the required frequency band. For cost effective manufacturing with high repeatability, the smooth wall spline profile is drilled in out from a metal block using a custom made broach. To validate the design and fabrication, planar measurements of the phase and amplitude have been performed and from measured E-field vital horn parameters have been extracted.
{"title":"A 340 GHz high Gaussicity smooth spline horn antenna for the STEAMR instrument","authors":"A. Hammar, Y. Karandikar, Per Forsberg, A. Emrich, J. Stake","doi":"10.1109/APS.2014.6904655","DOIUrl":"https://doi.org/10.1109/APS.2014.6904655","url":null,"abstract":"We present the design, fabrication and measurements of a smooth walled spline feed horn antenna for the satellite borne climate research instrument STEAMR operating at 340 GHz. A method has been developed which, for a certain desired beam waist, can be used to optimize the horn profile for high Gaussicity and ultra-low sidelobes. The simulated performance of the horn achieves a beam waist of 1.9 mm over the band 323-357 GHz with Gaussian coupling efficiency exceeding 98%. The peak cross-polar sidelobes are below -28 dB over the required frequency band. For cost effective manufacturing with high repeatability, the smooth wall spline profile is drilled in out from a metal block using a custom made broach. To validate the design and fabrication, planar measurements of the phase and amplitude have been performed and from measured E-field vital horn parameters have been extracted.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"72 1","pages":"649-650"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86137360","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 : 2014-07-06DOI: 10.1109/APS.2014.6905429
G. Kubické, C. Bourlier, P. Pouliguen
For a three-dimensional (3-D) problem, this paper shows that the Babinet Principle (BP) can be seen as a good approximation of Physical Optics (PO) for the shadow radiation. Indeed, an original demonstration of the shadow contour theorem (from Ufimtsev) is given which shows that the shadow component of PO does not depend on the shape of the object, but only on its contour. Moreover, we also show mathematically that the reflected component of PO vanishes in the forward scattering (FS) direction. Simulations are provided to illustrate the link between the BP and the PO.
{"title":"Shadow radiation: Relations between Babinet principle and Physical Optics","authors":"G. Kubické, C. Bourlier, P. Pouliguen","doi":"10.1109/APS.2014.6905429","DOIUrl":"https://doi.org/10.1109/APS.2014.6905429","url":null,"abstract":"For a three-dimensional (3-D) problem, this paper shows that the Babinet Principle (BP) can be seen as a good approximation of Physical Optics (PO) for the shadow radiation. Indeed, an original demonstration of the shadow contour theorem (from Ufimtsev) is given which shows that the shadow component of PO does not depend on the shape of the object, but only on its contour. Moreover, we also show mathematically that the reflected component of PO vanishes in the forward scattering (FS) direction. Simulations are provided to illustrate the link between the BP and the PO.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"12 1","pages":"2204-2205"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86273554","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 : 2014-07-06DOI: 10.1109/APS.2014.6904733
Daichi Higashi, H. Deguchi, M. Tsuji
This paper proposes new reflectarray elements for dual-polarization and wideband use. These elements provide linear phase property with the same slop characteristics for dual polarization, thereby achieving the desirable reflection phase over wide frequency range. To verify effectiveness of the proposed elements, we present an offset reflectarray designed by using them, and also confirm wideband frequency characteristics numerically and experimentally.
{"title":"Omega-shaped resonant elements for dual-polarization and wideband reflectarray","authors":"Daichi Higashi, H. Deguchi, M. Tsuji","doi":"10.1109/APS.2014.6904733","DOIUrl":"https://doi.org/10.1109/APS.2014.6904733","url":null,"abstract":"This paper proposes new reflectarray elements for dual-polarization and wideband use. These elements provide linear phase property with the same slop characteristics for dual polarization, thereby achieving the desirable reflection phase over wide frequency range. To verify effectiveness of the proposed elements, we present an offset reflectarray designed by using them, and also confirm wideband frequency characteristics numerically and experimentally.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"1 1","pages":"809-810"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86274100","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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