Pub Date : 2014-07-06DOI: 10.1109/APS.2014.6905101
H. Nakano, K. Yoshida, J. Yamauchi
This paper presents the radiation characteristics of a low-profile circularly polarized loop antenna that has a left-handed property. The antenna height is set to be small (less than 0.03 wavelength). The gain, axial ratio, radiation efficiency, and VSWR are discussed.
{"title":"Left-handed loop antenna","authors":"H. Nakano, K. Yoshida, J. Yamauchi","doi":"10.1109/APS.2014.6905101","DOIUrl":"https://doi.org/10.1109/APS.2014.6905101","url":null,"abstract":"This paper presents the radiation characteristics of a low-profile circularly polarized loop antenna that has a left-handed property. The antenna height is set to be small (less than 0.03 wavelength). The gain, axial ratio, radiation efficiency, and VSWR are discussed.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"34 1","pages":"1550-1551"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84649036","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.2014.6904783
C. Furse, D. Ziegenfuss, S. Bamberg
The flipped classroom has gained tremendous recent popularity. This paper reports on a new faculty training program for helping and mentoring faculty to learn to teach with the flipped classroom. Several modules were piloted in 2013-2014, including active teaching, how to create video lectures, content selection for the flipped classroom, implementing flipped lectures, helping your students learn flipped, and assessing the flipped classroom. This program is available free online for interested faculty.
{"title":"Learning to teach in the flipped classroom","authors":"C. Furse, D. Ziegenfuss, S. Bamberg","doi":"10.1109/APS.2014.6904783","DOIUrl":"https://doi.org/10.1109/APS.2014.6904783","url":null,"abstract":"The flipped classroom has gained tremendous recent popularity. This paper reports on a new faculty training program for helping and mentoring faculty to learn to teach with the flipped classroom. Several modules were piloted in 2013-2014, including active teaching, how to create video lectures, content selection for the flipped classroom, implementing flipped lectures, helping your students learn flipped, and assessing the flipped classroom. This program is available free online for interested faculty.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"43 1","pages":"910-911"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88513932","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.2014.6904395
Nan-Keng Yeh, M. Kehn
There have been many papers about applications of substrate integrated waveguide (SIW). Only a few related to the use of mathematical methods to analyze SIW, however, were reported. We present an analytical method that is easy, quick and also accurate to obtain the modal dispersion diagrams and field distributions of SIWs. The closed-form characteristic equations and field expressions provide us insights into the modal behavior of the SIW, providing us the knowledge of the impact and influences which the various parameters have on the SIW, thereby saving a great deal of time in engineering and design often entailing lengthy simulations by full-wave solvers or even trial-and-error practices. We compare the dispersion diagrams and modal field distributions obtained by using our analytical method with those generated by CST Microwave Studio.
{"title":"Analysis of substrate integrated waveguides by asymptotic strips boundary conditions","authors":"Nan-Keng Yeh, M. Kehn","doi":"10.1109/APS.2014.6904395","DOIUrl":"https://doi.org/10.1109/APS.2014.6904395","url":null,"abstract":"There have been many papers about applications of substrate integrated waveguide (SIW). Only a few related to the use of mathematical methods to analyze SIW, however, were reported. We present an analytical method that is easy, quick and also accurate to obtain the modal dispersion diagrams and field distributions of SIWs. The closed-form characteristic equations and field expressions provide us insights into the modal behavior of the SIW, providing us the knowledge of the impact and influences which the various parameters have on the SIW, thereby saving a great deal of time in engineering and design often entailing lengthy simulations by full-wave solvers or even trial-and-error practices. We compare the dispersion diagrams and modal field distributions obtained by using our analytical method with those generated by CST Microwave Studio.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"23 1","pages":"127-128"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88601901","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.2014.6905336
A. Naghar, O. Aghzout, A. Vázquez Alejos, M. García Sánchez, M. Essaaidi
This paper presents an implemented calculator tool for the design of Edge/ Parallel Coupled Microstrip Band Pass Filters (PCMBPF) that makes use of the MATLAB software. This calculator allows estimating both the parameters required for the design of the PCMBPF and the electrical response which is obtained by means of the equivalent circuit of this type of filters. Based on the transmission line theory approach (TLTA), the calculator herein proposed is a good solution to simply obtain the design parameters of this type of filters given that all formulas required for the PCMBPF design are programmed using close-form mathematic expressions and the coupling matrix concept. In order to validate our calculator performance, we implemented the proposed filter in a commercial electromagnetic simulator CST MWs that considers a set of electromagnetic effects, and accurately determine the final filter design. Secondly, we compared these simulation outcomes with the measurement results, achieving a reasonable agreement.
{"title":"Development of a calculator for Edge and Parallel Coupled Microstrip band pass filters","authors":"A. Naghar, O. Aghzout, A. Vázquez Alejos, M. García Sánchez, M. Essaaidi","doi":"10.1109/APS.2014.6905336","DOIUrl":"https://doi.org/10.1109/APS.2014.6905336","url":null,"abstract":"This paper presents an implemented calculator tool for the design of Edge/ Parallel Coupled Microstrip Band Pass Filters (PCMBPF) that makes use of the MATLAB software. This calculator allows estimating both the parameters required for the design of the PCMBPF and the electrical response which is obtained by means of the equivalent circuit of this type of filters. Based on the transmission line theory approach (TLTA), the calculator herein proposed is a good solution to simply obtain the design parameters of this type of filters given that all formulas required for the PCMBPF design are programmed using close-form mathematic expressions and the coupling matrix concept. In order to validate our calculator performance, we implemented the proposed filter in a commercial electromagnetic simulator CST MWs that considers a set of electromagnetic effects, and accurately determine the final filter design. Secondly, we compared these simulation outcomes with the measurement results, achieving a reasonable agreement.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"31 1","pages":"2018-2019"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88716197","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.2014.6905209
W. McKinzie, D. Nair, B. A. Thrasher, M. A. Smith, E. D. Hughes, J. Parisi
We present a 60 GHz LTCC aperture-coupled patch antenna with an integrated Sievenpiper EBG structure used for suppression of TM mode surface waves. This is believed to be the first demonstration of a Sievenpiper EBG structure used inside a millimeterwave LTCC antenna. The merit of this EBG structure is to yield a predicted 6 dB improvement in broadside directivity. Without the EBG structure, edge diffraction of surface waves degrades the pattern into two main beams. The combination of a new LTCC material system (DuPont 9K7 GreenTape™) along with laser ablation processing for fine line and fine slot definition allowed the integration of a successful EBG structure with an aperture coupled patch antenna.
{"title":"60 GHz patch antenna in LTCC with an integrated EBG structure for antenna pattern improvements","authors":"W. McKinzie, D. Nair, B. A. Thrasher, M. A. Smith, E. D. Hughes, J. Parisi","doi":"10.1109/APS.2014.6905209","DOIUrl":"https://doi.org/10.1109/APS.2014.6905209","url":null,"abstract":"We present a 60 GHz LTCC aperture-coupled patch antenna with an integrated Sievenpiper EBG structure used for suppression of TM mode surface waves. This is believed to be the first demonstration of a Sievenpiper EBG structure used inside a millimeterwave LTCC antenna. The merit of this EBG structure is to yield a predicted 6 dB improvement in broadside directivity. Without the EBG structure, edge diffraction of surface waves degrades the pattern into two main beams. The combination of a new LTCC material system (DuPont 9K7 GreenTape™) along with laser ablation processing for fine line and fine slot definition allowed the integration of a successful EBG structure with an aperture coupled patch antenna.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"35 1","pages":"1766-1767"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87346518","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.2014.6905022
Ping Li, L. J. Jiang, H. Bağcı
A discontinuous Galerkin time-domain (DGTD) method is proposed for analyzing electromagnetic field interactions on graphene from microwave to terahertz frequencies. An impedance boundary condition (IBC) is utilized to model the graphene within the DGTD framework. The numerical flux is reformulated to take into account the IBC. Highly dispersive surface conductivity of graphene present in the resulting flux expression is approximated in terms of rational functions using the fast-relaxation vector-fitting technique. Via inverse Laplace transform, this facilitates the time domain matrix equations into an integral form for time variable t, finite integral technique (FIT) with recursive convolution method is employed to discrete and solve the matrix equations. The accuracy and applicability of the proposed IBC-DGTD is verified by numerical experiments.
{"title":"An IBC enhanced DGTD scheme for transient analysis of EM interactions with graphene","authors":"Ping Li, L. J. Jiang, H. Bağcı","doi":"10.1109/APS.2014.6905022","DOIUrl":"https://doi.org/10.1109/APS.2014.6905022","url":null,"abstract":"A discontinuous Galerkin time-domain (DGTD) method is proposed for analyzing electromagnetic field interactions on graphene from microwave to terahertz frequencies. An impedance boundary condition (IBC) is utilized to model the graphene within the DGTD framework. The numerical flux is reformulated to take into account the IBC. Highly dispersive surface conductivity of graphene present in the resulting flux expression is approximated in terms of rational functions using the fast-relaxation vector-fitting technique. Via inverse Laplace transform, this facilitates the time domain matrix equations into an integral form for time variable t, finite integral technique (FIT) with recursive convolution method is employed to discrete and solve the matrix equations. The accuracy and applicability of the proposed IBC-DGTD is verified by numerical experiments.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"27 1","pages":"1393-1394"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87425925","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.2014.6904550
Yi Wu, Chien-Chorng Chou, Wen-Yi Ruan, Chun-Han Yu, Shih-Chiao Huang, H. Chuang
This paper presents a 60-GHz CMOS 2 × 2 artificial magnetic conductor (AMC) monopole on-chip antenna array in 90-nm CMOS technology for phased-array RF receiving system. With the AMC structure, the radiation efficiency and power gain of the on-chip monopole antenna increases from 6% to 15% and from -9 to -5 dBi at 60 GHz, respectively. On-wafer beam steering measurement shows that the antenna-array main beam can scan to ±25° in the XZ plane. The chip size is 3.1 × 3.8 mm2.
{"title":"60-GHz CMOS 2 × 2 artificial-magnetic-conductor monopole on-chip antenna array for phased-array RF receiving system","authors":"Yi Wu, Chien-Chorng Chou, Wen-Yi Ruan, Chun-Han Yu, Shih-Chiao Huang, H. Chuang","doi":"10.1109/APS.2014.6904550","DOIUrl":"https://doi.org/10.1109/APS.2014.6904550","url":null,"abstract":"This paper presents a 60-GHz CMOS 2 × 2 artificial magnetic conductor (AMC) monopole on-chip antenna array in 90-nm CMOS technology for phased-array RF receiving system. With the AMC structure, the radiation efficiency and power gain of the on-chip monopole antenna increases from 6% to 15% and from -9 to -5 dBi at 60 GHz, respectively. On-wafer beam steering measurement shows that the antenna-array main beam can scan to ±25° in the XZ plane. The chip size is 3.1 × 3.8 mm2.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"os-51 1","pages":"436-437"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87251153","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.2014.6904447
D. Cavallo, W. Syed, A. Neto
We present an analytical formulation to model artificial dielectric layers (ADLs), for arbitrary field incidence. We first derive the solution for the magnetic current distribution on a single layer, under generic plane-wave illumination. This solution is found in closed-form by expanding the total current with proper entire-domain basis functions. Simple analytical expressions are also derived for the scattered field and the equivalent sheet impedance of the layer. The formulation is then extended to the multi-layer case, by including the higher-order interaction between parallel layers in analytical form. The method can be used, for example, to describe the radiation of a source located in the close proximity of the ADL. The theoretical analysis agrees well with simulations from commercial electromagnetic solvers and measurements from a X-band prototype.
{"title":"Closed-form analysis of the decoupling properties of artificial dielectric layers","authors":"D. Cavallo, W. Syed, A. Neto","doi":"10.1109/APS.2014.6904447","DOIUrl":"https://doi.org/10.1109/APS.2014.6904447","url":null,"abstract":"We present an analytical formulation to model artificial dielectric layers (ADLs), for arbitrary field incidence. We first derive the solution for the magnetic current distribution on a single layer, under generic plane-wave illumination. This solution is found in closed-form by expanding the total current with proper entire-domain basis functions. Simple analytical expressions are also derived for the scattered field and the equivalent sheet impedance of the layer. The formulation is then extended to the multi-layer case, by including the higher-order interaction between parallel layers in analytical form. The method can be used, for example, to describe the radiation of a source located in the close proximity of the ADL. The theoretical analysis agrees well with simulations from commercial electromagnetic solvers and measurements from a X-band prototype.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"44 1","pages":"231-232"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87358706","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.2014.6905099
Haixia Liu, Yingchun Fan, K. Zhou, Long Li, Xiao-wei Shi
The near-zero refractive index metamaterials (ZIM) have attracted more and more attentions because of their novel properties. In this paper, a theoretical analysis of a patch antenna with different ZIM superstrates has been given, which gives an insight into the mechanism of directivity enhancement using three different ZIM metamaterials as the antenna's superstrates. It shows that double near-zero (permittivity and permeability are near zero, DNZ) metamaterial superstrate can converge the aperture E-field and H-field of the antenna simultaneously. The increase of 9.2dB of radiation directivity can be obtained.
{"title":"High-directivity antenna using reconfigurable near-zero index metamaterial superstrates","authors":"Haixia Liu, Yingchun Fan, K. Zhou, Long Li, Xiao-wei Shi","doi":"10.1109/APS.2014.6905099","DOIUrl":"https://doi.org/10.1109/APS.2014.6905099","url":null,"abstract":"The near-zero refractive index metamaterials (ZIM) have attracted more and more attentions because of their novel properties. In this paper, a theoretical analysis of a patch antenna with different ZIM superstrates has been given, which gives an insight into the mechanism of directivity enhancement using three different ZIM metamaterials as the antenna's superstrates. It shows that double near-zero (permittivity and permeability are near zero, DNZ) metamaterial superstrate can converge the aperture E-field and H-field of the antenna simultaneously. The increase of 9.2dB of radiation directivity can be obtained.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"32 1","pages":"1546-1547"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84727578","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.2014.6904483
L. Foged, F. Saccardi, L. Scialacqua, L. Salghetti Drioli, J. A. Araque Quijano, G. Vecchi
This paper describes the application of the inversesource also named source-reconstruction technique [1-4] applied to the practical case of a space antenna intended for the European Navigation System GALILEO. The antenna (a pre-development flying on the GALILEO In Orbit Validation Element-B (GIOVE-B) satellite) consists in an array of 42 patch elements, divided into six sectors and fed by a two levels beam forming network (BFN) as described in [5]-[6]. The BFN provides complex excitation coefficients of each array element to obtain the desired iso-flux shaped beam pattern. The measurements have been performed in the new hybrid (Near Field and Compact Range) facility in the ESTEC CPTR as part of the installation and validation procedure [7]. The inverse-source technique has been applied to identify and filter out possible spurious signals presents in the hybrid facility and to isolate the sub-array radiations in order to highlight possible errors.
本文描述了反源(也称为源重建技术)的应用[1-4]，应用于欧洲导航系统GALILEO的空间天线的实际案例。天线(在伽利略在轨验证单元- b (GIOVE-B)卫星上飞行的预开发)由42个贴片单元阵列组成，分为六个扇区，由两级波束形成网络(BFN)馈电，如[5]-[6]所述。BFN提供了每个阵列单元的复杂激励系数，以获得期望的等通量形光束图。作为安装和验证程序的一部分，这些测量是在ESTEC CPTR的新型混合(近场和紧凑范围)设备中进行的[7]。反源技术已被应用于识别和滤除混合设备中可能出现的杂散信号，并隔离子阵列辐射以突出可能的错误。
{"title":"Diagnostic and investigation of sub-array radiation of large array antenna by inverse source technique","authors":"L. Foged, F. Saccardi, L. Scialacqua, L. Salghetti Drioli, J. A. Araque Quijano, G. Vecchi","doi":"10.1109/APS.2014.6904483","DOIUrl":"https://doi.org/10.1109/APS.2014.6904483","url":null,"abstract":"This paper describes the application of the inversesource also named source-reconstruction technique [1-4] applied to the practical case of a space antenna intended for the European Navigation System GALILEO. The antenna (a pre-development flying on the GALILEO In Orbit Validation Element-B (GIOVE-B) satellite) consists in an array of 42 patch elements, divided into six sectors and fed by a two levels beam forming network (BFN) as described in [5]-[6]. The BFN provides complex excitation coefficients of each array element to obtain the desired iso-flux shaped beam pattern. The measurements have been performed in the new hybrid (Near Field and Compact Range) facility in the ESTEC CPTR as part of the installation and validation procedure [7]. The inverse-source technique has been applied to identify and filter out possible spurious signals presents in the hybrid facility and to isolate the sub-array radiations in order to highlight possible errors.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"3 1","pages":"303-304"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86983228","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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