Pub Date : 2014-07-06DOI: 10.1109/APS.2014.6904794
W. Syed, D. Cavallo, A. Neto, P. van Zeijl
In this contribution, we present a 60 GHz design of a connected array of slots combined with artificial dielectric layers (ADLs). The antenna array consists of 2×8 connected-slot elements, fed coherently with a corporate feeding network. The array is loaded with an artificial dielectric slab with high permittivity, which has the advantage of enhancing the forward radiation without supporting surface waves. The ohmic losses introduced by the metallic inclusions of the ADLs are very low due to the non-resonant nature of the electrically small patches. Simulated results are presented, showing desired fan-beam radiation characteristics and a relative bandwidth of 33%.
{"title":"Design of connected array loaded with artificial dielectric at 60 GHz","authors":"W. Syed, D. Cavallo, A. Neto, P. van Zeijl","doi":"10.1109/APS.2014.6904794","DOIUrl":"https://doi.org/10.1109/APS.2014.6904794","url":null,"abstract":"In this contribution, we present a 60 GHz design of a connected array of slots combined with artificial dielectric layers (ADLs). The antenna array consists of 2×8 connected-slot elements, fed coherently with a corporate feeding network. The array is loaded with an artificial dielectric slab with high permittivity, which has the advantage of enhancing the forward radiation without supporting surface waves. The ohmic losses introduced by the metallic inclusions of the ADLs are very low due to the non-resonant nature of the electrically small patches. Simulated results are presented, showing desired fan-beam radiation characteristics and a relative bandwidth of 33%.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"34 1","pages":"931-932"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73942283","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.2014.6905006
B. Fuchs
A general procedure, based on the SemiDefinite Relaxation (SDR) technique, is presented to solve efficiently a wide range of difficult (because non-convex) array synthesis problems. This powerful approximation technique is easy to implement and the so-approximated problem can then be efficiently solved using off-the-shelf numerical routines. Examples of shaped beam and reconfigurable array synthesis are shown to illustrate the potentialities of the proposed approach.
{"title":"Array synthesis problems via convex relaxation","authors":"B. Fuchs","doi":"10.1109/APS.2014.6905006","DOIUrl":"https://doi.org/10.1109/APS.2014.6905006","url":null,"abstract":"A general procedure, based on the SemiDefinite Relaxation (SDR) technique, is presented to solve efficiently a wide range of difficult (because non-convex) array synthesis problems. This powerful approximation technique is easy to implement and the so-approximated problem can then be efficiently solved using off-the-shelf numerical routines. Examples of shaped beam and reconfigurable array synthesis are shown to illustrate the potentialities of the proposed approach.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"15 1","pages":"1361-1362"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74561882","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.2014.6905146
N. Chamberlain, Mauricio Sanchez Barbetty, G. Sadowy, Ezra M. Long, K. Vanhille
This paper describes results of measurements of a 2×2 `unit cell' of dual-polarized metal patch elements intended for electronically scanned array applications. The unit cell is the fundamental building block of a linear array feed to a cylindrical parabolic reflector. The transmit and receive elements are arranged on a triangular grid which provides good isolation between separate transmit and receive modules, obviating the need for circulators. The 2×2 unit cell and associated feed network was implemented in PolyStrata® technology. Measurements agree very well with simulations in HFSS, with the overall loss of the element and interconnect estimated as 0.5dB at 94 GHz.
{"title":"A dual-polarized W-band metal patch antenna element for phased array applications","authors":"N. Chamberlain, Mauricio Sanchez Barbetty, G. Sadowy, Ezra M. Long, K. Vanhille","doi":"10.1109/APS.2014.6905146","DOIUrl":"https://doi.org/10.1109/APS.2014.6905146","url":null,"abstract":"This paper describes results of measurements of a 2×2 `unit cell' of dual-polarized metal patch elements intended for electronically scanned array applications. The unit cell is the fundamental building block of a linear array feed to a cylindrical parabolic reflector. The transmit and receive elements are arranged on a triangular grid which provides good isolation between separate transmit and receive modules, obviating the need for circulators. The 2×2 unit cell and associated feed network was implemented in PolyStrata® technology. Measurements agree very well with simulations in HFSS, with the overall loss of the element and interconnect estimated as 0.5dB at 94 GHz.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"13 1","pages":"1640-1641"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78926556","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.2014.6905396
A. Lapovok, R. Nizkiy, I. Shikhov, O. Grimalsky
Problem of electromagnetic scattering by a system of wires, conductive surfaces and magnitodielectric volumes is solved. It is reduced to solution of volume-surface integral equations (VSIE). For approximation of equivalent electric and magnetic currents basis functions based on Rao-Wilton-Glisson (RWG) and Shaubert-Wilton-Glisson (SWG) functions are used. Integral equations are used in a form which unites formulations for different regions. To ensure linear independence of basis functions and absence of artificial charges inside volume elements the spanning tree of the graph representing topology of the mesh is constructed. Proposed method coupled with multilevel fast multipole algorithm (MLFMA) is applied to scattering on perfectly conducting sphere coated by dielectric layer.
{"title":"Selection of basis functions for volume-surface integral equation using spanning tree","authors":"A. Lapovok, R. Nizkiy, I. Shikhov, O. Grimalsky","doi":"10.1109/APS.2014.6905396","DOIUrl":"https://doi.org/10.1109/APS.2014.6905396","url":null,"abstract":"Problem of electromagnetic scattering by a system of wires, conductive surfaces and magnitodielectric volumes is solved. It is reduced to solution of volume-surface integral equations (VSIE). For approximation of equivalent electric and magnetic currents basis functions based on Rao-Wilton-Glisson (RWG) and Shaubert-Wilton-Glisson (SWG) functions are used. Integral equations are used in a form which unites formulations for different regions. To ensure linear independence of basis functions and absence of artificial charges inside volume elements the spanning tree of the graph representing topology of the mesh is constructed. Proposed method coupled with multilevel fast multipole algorithm (MLFMA) is applied to scattering on perfectly conducting sphere coated by dielectric layer.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"80 1","pages":"2138-2139"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78217647","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.2014.6904469
Hsien kang Tseng, P. Hsu
An integrated dual planar inverted-F antenna (PIFA) with tunable antenna height for handheld devices is proposed. The antenna is composed of two conventional PIFAs merged together through a common metallic strip and a shorting pin connected to the ground plane. The two L-shaped slots on the ground plane are used to reduce the mutual coupling between the planar antenna elements and the chassis, and to decrease the height of the proposed antenna. Good isolation is obtained in the frequency band of 2.25 ~ 2.6 GHz for IEEE 802.11n wireless local area network (WLAN) application. Design and measurement results are presented and discussed.
{"title":"Integrated dual planar inverted-F antenna with tunable antenna height for handheld devices","authors":"Hsien kang Tseng, P. Hsu","doi":"10.1109/APS.2014.6904469","DOIUrl":"https://doi.org/10.1109/APS.2014.6904469","url":null,"abstract":"An integrated dual planar inverted-F antenna (PIFA) with tunable antenna height for handheld devices is proposed. The antenna is composed of two conventional PIFAs merged together through a common metallic strip and a shorting pin connected to the ground plane. The two L-shaped slots on the ground plane are used to reduce the mutual coupling between the planar antenna elements and the chassis, and to decrease the height of the proposed antenna. Good isolation is obtained in the frequency band of 2.25 ~ 2.6 GHz for IEEE 802.11n wireless local area network (WLAN) application. Design and measurement results are presented and discussed.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"23 1","pages":"275-276"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78507188","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.2014.6904793
D. Papantonis, J. Volakis
Recent efforts on tightly-coupled dipole arrays (TCDA) have yielded conformal, low profile designs that demonstrate remarkable bandwidths. In [1], a TCDA with integrated balun (TCDA-IB) and substrate loading was presented. In the current paper, we extend this work to a dual-polarization TCDA that scans up to 45°. It exhibits an infinite array bandwidth of 13.5:1 (290MHz-3.9GHz) with an active VSWR<;3 and total efficiency (including reflection) >60% in all planes. The validity of the design is verified fabricating and testing an 8x8 prototype with a measured bandwidth of 11:1.
{"title":"Dual-polarization TCDA-IB with substrate loading","authors":"D. Papantonis, J. Volakis","doi":"10.1109/APS.2014.6904793","DOIUrl":"https://doi.org/10.1109/APS.2014.6904793","url":null,"abstract":"Recent efforts on tightly-coupled dipole arrays (TCDA) have yielded conformal, low profile designs that demonstrate remarkable bandwidths. In [1], a TCDA with integrated balun (TCDA-IB) and substrate loading was presented. In the current paper, we extend this work to a dual-polarization TCDA that scans up to 45°. It exhibits an infinite array bandwidth of 13.5:1 (290MHz-3.9GHz) with an active VSWR<;3 and total efficiency (including reflection) >60% in all planes. The validity of the design is verified fabricating and testing an 8x8 prototype with a measured bandwidth of 11:1.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"37 1","pages":"930-930"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75899165","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.2014.6904828
P. E. Sieber, D. Werner
A reconfigurable dual-band circularly polarizing conformal patch antenna is demonstrated in the S-band. The dual-band behavior is achieved via the implementation of reactive end-loading without the use of shorting pins or any other connection to ground. Through the integration of variable capacitive or resistive elements into the reactive end-load, it is demonstrated that the second resonance frequency can be varied whereas the fundamental resonance remains unaffected.
{"title":"A reconfigurable dual-band circularly polarizing miniturized conformal patch antenna exhibiting small frequency ratios","authors":"P. E. Sieber, D. Werner","doi":"10.1109/APS.2014.6904828","DOIUrl":"https://doi.org/10.1109/APS.2014.6904828","url":null,"abstract":"A reconfigurable dual-band circularly polarizing conformal patch antenna is demonstrated in the S-band. The dual-band behavior is achieved via the implementation of reactive end-loading without the use of shorting pins or any other connection to ground. Through the integration of variable capacitive or resistive elements into the reactive end-load, it is demonstrated that the second resonance frequency can be varied whereas the fundamental resonance remains unaffected.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"285 1","pages":"1001-1002"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74959989","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.2014.6904559
L. F. Carrera-Suárez, D. Navarro-Mendez, M. Baquero-Escudero, Sara Martinez, A. Valero-Nogueira
A compact twist connecting a Ridge-Gap Waveguide and a Groove-Gap Waveguide at 38 GHz is presented. This twist is intended for feeding an array antenna. Simulations show a return loss better than 20 dB between 37.3 GHz and 38.3 GHz. The insertion loss is below 0.4 dB within the same frequency band. This bandwidth may be enough for many applications.
{"title":"A novel twist between Gap Waveguides for compact slot-array antennas","authors":"L. F. Carrera-Suárez, D. Navarro-Mendez, M. Baquero-Escudero, Sara Martinez, A. Valero-Nogueira","doi":"10.1109/APS.2014.6904559","DOIUrl":"https://doi.org/10.1109/APS.2014.6904559","url":null,"abstract":"A compact twist connecting a Ridge-Gap Waveguide and a Groove-Gap Waveguide at 38 GHz is presented. This twist is intended for feeding an array antenna. Simulations show a return loss better than 20 dB between 37.3 GHz and 38.3 GHz. The insertion loss is below 0.4 dB within the same frequency band. This bandwidth may be enough for many applications.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"19 1","pages":"456-457"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74997893","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.2014.6904390
Hyunsoo Lee, Ki-Hwan Jung, I. Koh
A criterion to choose one of two far-field approximations for Sommerfeld integral for impedance half-plane problem is proposed. It is dependent on the given impedance value and the antenna locations.
给出了阻抗半平面问题的索默菲尔德积分的两种远场近似的选择准则。它取决于给定的阻抗值和天线位置。
{"title":"Criterion to choose far-field approximation for Sommerfeld integral for impedance half-plane","authors":"Hyunsoo Lee, Ki-Hwan Jung, I. Koh","doi":"10.1109/APS.2014.6904390","DOIUrl":"https://doi.org/10.1109/APS.2014.6904390","url":null,"abstract":"A criterion to choose one of two far-field approximations for Sommerfeld integral for impedance half-plane problem is proposed. It is dependent on the given impedance value and the antenna locations.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"150 1","pages":"117-118"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77374805","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.2014.6905069
M. Abdel-Mageed, Sidharath Jain, K. Panayappan, R. Mittra
This paper describes a technique for realizing an Iso-flux Pattern Antenna (IPA) suitable for operation in the Ka band, although the proposed design methodology is general and equally applicable to other frequencies as well. The IPA is designed to radiate at a specific elevation angle, while suppressing radiation along the zenith. The electrical performance of the designed antenna has been verified in terms of the magnitude and phase of the field distribution as well as the far-field pattern radiated by the aperture distribution.
{"title":"Design of antennas with an Iso-flux Pattern to achieve suppression of radiation along zenith","authors":"M. Abdel-Mageed, Sidharath Jain, K. Panayappan, R. Mittra","doi":"10.1109/APS.2014.6905069","DOIUrl":"https://doi.org/10.1109/APS.2014.6905069","url":null,"abstract":"This paper describes a technique for realizing an Iso-flux Pattern Antenna (IPA) suitable for operation in the Ka band, although the proposed design methodology is general and equally applicable to other frequencies as well. The IPA is designed to radiate at a specific elevation angle, while suppressing radiation along the zenith. The electrical performance of the designed antenna has been verified in terms of the magnitude and phase of the field distribution as well as the far-field pattern radiated by the aperture distribution.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"163 1","pages":"1487-1488"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77538894","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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