Pub Date : 2016-06-01DOI: 10.1109/APS.2016.7696211
B. Kolundžija
The paper presents short history of research, development, and usage of higher order basis functions (HOBFs) in thin-wire and boundary element analysis, which are related to application of method of moments (MoM) to surface integral equations (SIEs). Typical example showing advantages of HOBFs is presented. Challenges for HOBFs are outlined.
{"title":"Higher order basis functions: 50 Years of research, development and practice","authors":"B. Kolundžija","doi":"10.1109/APS.2016.7696211","DOIUrl":"https://doi.org/10.1109/APS.2016.7696211","url":null,"abstract":"The paper presents short history of research, development, and usage of higher order basis functions (HOBFs) in thin-wire and boundary element analysis, which are related to application of method of moments (MoM) to surface integral equations (SIEs). Typical example showing advantages of HOBFs is presented. Challenges for HOBFs are outlined.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"44 1","pages":"1007-1008"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74673571","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 : 2016-06-01DOI: 10.1109/APS.2016.7696128
Xueli Liu, Shun Yao, Pablo J. González, S. Georgakopoulos
This paper presents a novel design of ultrawideband origami quasi-taper antenna that can be reconfigured to operate from 1.28 GHz to 4.12 GHz at 3 different states of height, and the operating bandwidths at the 3 states are respectively 1.28 GHz-1.64 GHz (25%), 1.64 GHz-3.56 GHz (74%) and 3.56 GHz-4.12 GHz (14.6%). Therefore, this antenna can be applied for kinds of wireless communications in L band and S band with unidirectional radiations. Simulated realized gain at the 3 states of antenna height in their operating frequency bands are respectively greater than 6 dB (H=271 mm), 8.5 dB (H=147 mm) and 5 dB (H=57 mm). Right-hand circular polarization happens at state 2 from 2.04 GHz to 3.56 GHz (fractional circular polarization bandwidth=54%), and the CP bandwidth is better than the standard monofilar and previously proposed origami conical spiral antenna, while polarizations at the other 2 states are either linear or elliptical in their operating frequency bands.
本文提出了一种新颖的超宽带折纸准锥形天线设计，该天线可以在1.28 GHz至4.12 GHz 3种不同的高度状态下重新配置，工作带宽分别为1.28 GHz-1.64 GHz(25%)、1.64 GHz-3.56 GHz(74%)和3.56 GHz-4.12 GHz(14.6%)。因此，该天线可用于单向辐射的L波段和S波段的各种无线通信。天线高度3种状态下在其工作频段内的模拟实现增益分别大于6 dB (H=271 mm)、8.5 dB (H=147 mm)和5 dB (H=57 mm)。在2.04 GHz ~ 3.56 GHz范围内，右旋圆极化发生在状态2(分数圆极化带宽=54%)，CP带宽优于标准单丝天线和先前提出的折纸锥形螺旋天线，而其他2种状态的极化在其工作频带内为线性或椭圆极化。
{"title":"A novel ultra-wideband origami reconfigurable quasi-taper helical antenna","authors":"Xueli Liu, Shun Yao, Pablo J. González, S. Georgakopoulos","doi":"10.1109/APS.2016.7696128","DOIUrl":"https://doi.org/10.1109/APS.2016.7696128","url":null,"abstract":"This paper presents a novel design of ultrawideband origami quasi-taper antenna that can be reconfigured to operate from 1.28 GHz to 4.12 GHz at 3 different states of height, and the operating bandwidths at the 3 states are respectively 1.28 GHz-1.64 GHz (25%), 1.64 GHz-3.56 GHz (74%) and 3.56 GHz-4.12 GHz (14.6%). Therefore, this antenna can be applied for kinds of wireless communications in L band and S band with unidirectional radiations. Simulated realized gain at the 3 states of antenna height in their operating frequency bands are respectively greater than 6 dB (H=271 mm), 8.5 dB (H=147 mm) and 5 dB (H=57 mm). Right-hand circular polarization happens at state 2 from 2.04 GHz to 3.56 GHz (fractional circular polarization bandwidth=54%), and the CP bandwidth is better than the standard monofilar and previously proposed origami conical spiral antenna, while polarizations at the other 2 states are either linear or elliptical in their operating frequency bands.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"96 1","pages":"839-840"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74682060","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 : 2016-06-01DOI: 10.1109/APS.2016.7696734
Zhe Geng, H. Deng
In this work an innovative beamforming approach is presented to effectively eliminate wireless interference and clutters using bistatic multiple-input multiple-output (MIMO) radar antenna arrays. It is demonstrated via simulations that both mainlobe and sidelobe interferences can be successfully removed without affecting target detection.
{"title":"Adaptive interference and clutter rejection processing for bistatic MIMO radar","authors":"Zhe Geng, H. Deng","doi":"10.1109/APS.2016.7696734","DOIUrl":"https://doi.org/10.1109/APS.2016.7696734","url":null,"abstract":"In this work an innovative beamforming approach is presented to effectively eliminate wireless interference and clutters using bistatic multiple-input multiple-output (MIMO) radar antenna arrays. It is demonstrated via simulations that both mainlobe and sidelobe interferences can be successfully removed without affecting target detection.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"5 1","pages":"2055-2056"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74879496","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 : 2016-06-01DOI: 10.1109/APS.2016.7696715
M. Salmasi, M. Potter
Maxwell's equations are discretized on a Face-Centered-Cubic (FCC) lattice instead of simple cubic to improve grid isotropy of the numerical simulation. Explicit update equations and numerical dispersion expressions are derived. The method is tested by simulating a dipole in a large computational domain to demonstrate the improved grid isotropy of the FCC lattice compared to the cartesian (standard Yee) grid. Also, a rectangular resonator is simulated, and the resonant frequencies are found to show the accuracy of the method.
{"title":"FDTD discretization of Maxwell's equations on a face-centered-cubic grid","authors":"M. Salmasi, M. Potter","doi":"10.1109/APS.2016.7696715","DOIUrl":"https://doi.org/10.1109/APS.2016.7696715","url":null,"abstract":"Maxwell's equations are discretized on a Face-Centered-Cubic (FCC) lattice instead of simple cubic to improve grid isotropy of the numerical simulation. Explicit update equations and numerical dispersion expressions are derived. The method is tested by simulating a dipole in a large computational domain to demonstrate the improved grid isotropy of the FCC lattice compared to the cartesian (standard Yee) grid. Also, a rectangular resonator is simulated, and the resonant frequencies are found to show the accuracy of the method.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"54 1","pages":"2017-2018"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72956787","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 : 2016-06-01DOI: 10.1109/APS.2016.7696349
K. Kona, S. Rengarajan
We investigate a linear array of microstrip patches consisting of excited elements spaced >λ with two parasitic patches in between. Varactor-controlled reactances are used to terminate the parasitic elements, to provide variable coupling between patches and to vary the reactive part of the input impedance of excited elements. A full wave analysis model is used to obtain the impedance matrix of the system. Subsequently a genetic algorithm optimization is used to obtain the reactance terminations to scan over an angular range of 0 to 45° in the H-plane. This low cost array can adaptively reconfigure for arbitrary shaped beams, and has the ability to steer a null.
{"title":"Scanning mircostrip arrays using controlled mutual reactance with parasitic elements","authors":"K. Kona, S. Rengarajan","doi":"10.1109/APS.2016.7696349","DOIUrl":"https://doi.org/10.1109/APS.2016.7696349","url":null,"abstract":"We investigate a linear array of microstrip patches consisting of excited elements spaced >λ with two parasitic patches in between. Varactor-controlled reactances are used to terminate the parasitic elements, to provide variable coupling between patches and to vary the reactive part of the input impedance of excited elements. A full wave analysis model is used to obtain the impedance matrix of the system. Subsequently a genetic algorithm optimization is used to obtain the reactance terminations to scan over an angular range of 0 to 45° in the H-plane. This low cost array can adaptively reconfigure for arbitrary shaped beams, and has the ability to steer a null.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"64 1","pages":"1283-1284"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73214746","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 : 2016-06-01DOI: 10.1109/APS.2016.7696539
S. Yan, G. Vandenbosch
This paper proposes a pattern reconfigurable wearable antenna based on a composite right/left-handed transmission line (CRLH TL). By turning switches on or off, the antenna can resonate both at the zeroth-order mode and the +1 mode, yielding a monopole and a patch like radiation pattern, respectively. Both operating modes cover the 2.4 GHz industrial, scientific and medical (ISM) band. The antenna is fabricated with textile material. It is robust under deformations and shows a low specific absorption rate (SAR).
{"title":"Wearable pattern reconfigurable patch antenna","authors":"S. Yan, G. Vandenbosch","doi":"10.1109/APS.2016.7696539","DOIUrl":"https://doi.org/10.1109/APS.2016.7696539","url":null,"abstract":"This paper proposes a pattern reconfigurable wearable antenna based on a composite right/left-handed transmission line (CRLH TL). By turning switches on or off, the antenna can resonate both at the zeroth-order mode and the +1 mode, yielding a monopole and a patch like radiation pattern, respectively. Both operating modes cover the 2.4 GHz industrial, scientific and medical (ISM) band. The antenna is fabricated with textile material. It is robust under deformations and shows a low specific absorption rate (SAR).","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"73 1","pages":"1665-1666"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73346311","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 : 2016-06-01DOI: 10.1109/APS.2016.7695904
S. Manafi, M. Al-Tarifi, D. Filipović
A V-W band quad-ridge horn antenna with stabilized gain and minimum differential E-H plane half power beamwidth (HPBW) is discussed. Multi-step flaring and corrugations on a finite ground plane are applied to achieve required stable gain above 16 dBi from 45 to 110 GHz. The computational studies conducted in HFSS are verified with CST and it is demonstrated that the designed antenna achieves gain variation <; 2 dB, VSWR <; 2:1, difference in E-H plane HPBWs of <; 10°, and acceptable patterns over the entire frequency band.
{"title":"45–110 GHz quad-ridge horn antenna","authors":"S. Manafi, M. Al-Tarifi, D. Filipović","doi":"10.1109/APS.2016.7695904","DOIUrl":"https://doi.org/10.1109/APS.2016.7695904","url":null,"abstract":"A V-W band quad-ridge horn antenna with stabilized gain and minimum differential E-H plane half power beamwidth (HPBW) is discussed. Multi-step flaring and corrugations on a finite ground plane are applied to achieve required stable gain above 16 dBi from 45 to 110 GHz. The computational studies conducted in HFSS are verified with CST and it is demonstrated that the designed antenna achieves gain variation <; 2 dB, VSWR <; 2:1, difference in E-H plane HPBWs of <; 10°, and acceptable patterns over the entire frequency band.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"47 1","pages":"391-392"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73351464","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 : 2016-06-01DOI: 10.1109/APS.2016.7696792
T. Fujimoto, Takuya Yoshida
In this paper, a printed inverted-F antenna for circular polarization is proposed. A rectangular element is loaded at the feeding element perpendicularly. The circular polarized wave is radiated in the frequency range between the first resonant frequency and the second resonant frequency produced by the rectangular element. The relationships between the geometrical parameters of the loaded rectangular element and the antenna characteristics (return loss and axial ratio) are investigated.
{"title":"A printed inverted-F antenna for circular polarization","authors":"T. Fujimoto, Takuya Yoshida","doi":"10.1109/APS.2016.7696792","DOIUrl":"https://doi.org/10.1109/APS.2016.7696792","url":null,"abstract":"In this paper, a printed inverted-F antenna for circular polarization is proposed. A rectangular element is loaded at the feeding element perpendicularly. The circular polarized wave is radiated in the frequency range between the first resonant frequency and the second resonant frequency produced by the rectangular element. The relationships between the geometrical parameters of the loaded rectangular element and the antenna characteristics (return loss and axial ratio) are investigated.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"41 1","pages":"2171-2172"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73579851","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 : 2016-06-01DOI: 10.1109/APS.2016.7695860
Dawei Li, D. Wilton, D. Jackson, Ji Chen
In this paper, a two-level asymptotic subtraction method is developed to remove all unbounded singularities that appear in the curl-type layered-medium Green's function (LMGF) for uniaxial media. This allows for a more robust and more accurate interpolation scheme for the efficient evaluation of the curl-type operators in the LMGF.
{"title":"Two-level singularity extraction for curl-type operators in layered-medium green's functions","authors":"Dawei Li, D. Wilton, D. Jackson, Ji Chen","doi":"10.1109/APS.2016.7695860","DOIUrl":"https://doi.org/10.1109/APS.2016.7695860","url":null,"abstract":"In this paper, a two-level asymptotic subtraction method is developed to remove all unbounded singularities that appear in the curl-type layered-medium Green's function (LMGF) for uniaxial media. This allows for a more robust and more accurate interpolation scheme for the efficient evaluation of the curl-type operators in the LMGF.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"30 1","pages":"303-304"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75355684","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 : 2016-06-01DOI: 10.1109/APS.2016.7696280
J. Pourahmadazar, R. Karimian, T. Denidni
This paper presents a novel beam shaping/steering phase array system using substrate integrated waveguide (SIW) fed Yagi-Uda array antenna. This structure employs an integrated waveguide structure Lens as a beam shaping network (BSN). The proposed microwave lens is Rotman type integrated lens in substrate. A prototype phase array system is designed with 7 beam ports, 9 array ports, and 8 dummy ports. A 10 GHz SIW-fed Yagi-Uda antenna is proposed with nonplanar director element as radiating elements with scanning capability over (-24°, +24°). Throughout this paper, the design process of the proposed 8-12 GHz phase array system has been demonstrated in details.
{"title":"8–12-GHz beam-shaping/steering phased antenna array system using SIW fed nonplanar director Yagi-Uda antenna","authors":"J. Pourahmadazar, R. Karimian, T. Denidni","doi":"10.1109/APS.2016.7696280","DOIUrl":"https://doi.org/10.1109/APS.2016.7696280","url":null,"abstract":"This paper presents a novel beam shaping/steering phase array system using substrate integrated waveguide (SIW) fed Yagi-Uda array antenna. This structure employs an integrated waveguide structure Lens as a beam shaping network (BSN). The proposed microwave lens is Rotman type integrated lens in substrate. A prototype phase array system is designed with 7 beam ports, 9 array ports, and 8 dummy ports. A 10 GHz SIW-fed Yagi-Uda antenna is proposed with nonplanar director element as radiating elements with scanning capability over (-24°, +24°). Throughout this paper, the design process of the proposed 8-12 GHz phase array system has been demonstrated in details.","PeriodicalId":6496,"journal":{"name":"2016 IEEE International Symposium on Antennas and Propagation (APSURSI)","volume":"59 1","pages":"1145-1146"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75564398","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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