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2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference最新文献

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Transient-imposed limitations of negative group delay circuits 负群延迟电路的瞬态限制
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552523
M. Kandic, G. Bridges
{"title":"Transient-imposed limitations of negative group delay circuits","authors":"M. Kandic, G. Bridges","doi":"10.1109/ANTEM.2010.5552523","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552523","url":null,"abstract":"In this paper the transients in gain compensated negative group delay (NGD) circuits are investigated. The study is conducted on an active unity gain NGD circuit with an RLC resonator integrated in the feedback loop of an operational amplifier. The circuit operates at a center frequency of 454MHz, and it is cascadable. The single stage circuit exhibits a NGD of 1.52ns and a gain of 0.69dB, with a fractional bandwidth of 23%. The circuit transient response to a step-modulated sinusoidal input is measured for a single-stage and two-stage circuits, showing a good agreement with analytical results. The analytical study is extended to general NGD multi-stage circuits based on RLC resonators and shows an exponential relationship between the transient level and the square of achieved NGD. We show that when considering information transfer applications, there is a limit on achievable NGD.","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"03 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129631550","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}
引用次数: 10
A push-push VCO using a phase shifter with 90° branch line hybrid circuit 一种采用移相器和90°支路混合电路的推推式压控振荡器
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552560
Takayuki Tanaka, Shuhei Mizoguchi, K. Kawasaki, M. Aikawa
{"title":"A push-push VCO using a phase shifter with 90° branch line hybrid circuit","authors":"Takayuki Tanaka, Shuhei Mizoguchi, K. Kawasaki, M. Aikawa","doi":"10.1109/ANTEM.2010.5552560","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552560","url":null,"abstract":"In this paper, a wideband push-push VCO using a phase shifter is presented. The phase shifter consists of a 90˚ branch line hybrid circuit and varactor diodes. The oscillator is a positive feedback type oscillator. In the oscillator, the oscillating frequency can be changed by using the phase shifter as the electrical length of the feedback loops determine the oscillating frequency. The circuit structure is very simple and compact due to the double-sided MIC structure. This type of push-push oscillator is suitable for a wideband VCO compared with a negative resistance type one. In the experiment, the developed push-push VCO in Ku-band achieves wide tuning frequency range of 1.2 GHz (relative bandwidth =7.5%).","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128232357","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}
引用次数: 3
Compact multiband omni-directional printed antennas 紧凑的多波段全向印刷天线
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552550
A. A. Saeed, S. Shams, A. Allam
{"title":"Compact multiband omni-directional printed antennas","authors":"A. A. Saeed, S. Shams, A. Allam","doi":"10.1109/ANTEM.2010.5552550","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552550","url":null,"abstract":"This article presents a design of a printed antenna with simply shaped radiator element for multi-operating bands of the wireless communication systems. With a simple design configuration including different U shapes on a printed FR4 substrate, the proposed antennas covering the GPS (1575 MHz), Mobile-WiMAX (3400–3600 MHz) and 5 GHz WLAN (5150– 5350/ 5725–5825 MHz) bands. Several properties of the proposed antennas in multiband operation, such as radiation pattern and measured return loss are numerically and experimentally investigated.","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125546808","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}
引用次数: 2
RCM SAR antenna capabilities RCM SAR天线能力
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552515
A. Fourmault, C. Grenier, P. Allan, G. Richardson
{"title":"RCM SAR antenna capabilities","authors":"A. Fourmault, C. Grenier, P. Allan, G. Richardson","doi":"10.1109/ANTEM.2010.5552515","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552515","url":null,"abstract":"This paper presents a top-level description of the RADARSAT Constellation Mission (RCM) Synthetic Aperture Radar (SAR) Antenna design and main operational modes and provides some Antenna RF performance predictions (gain pattern characteristics and pattern cuts).","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127846983","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}
引用次数: 1
Small-folded, printed quadrifilar helix antenna for GPS applications 用于GPS应用的小折叠印刷四线螺旋天线
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552579
J. Rabemanantsoa, A. Sharaiha
{"title":"Small-folded, printed quadrifilar helix antenna for GPS applications","authors":"J. Rabemanantsoa, A. Sharaiha","doi":"10.1109/ANTEM.2010.5552579","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552579","url":null,"abstract":"A new approach to designing a small printed quadrifilar helical antenna (PQHA) is presented. The printed wire is spiral in shape. The entire system is designed using Ansoft HFSS. A size reduction of 43% is obtained compared to a conventional PQHA. A dual band antenna working in L1/L2 GPS application is realized with a good gain and a good circular polarisation. Good agreement with the experimental results is obtained.","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114199502","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}
引用次数: 12
Drop shape, size and canting angle Distributions in stratiform and convective rain: Some examples and their impact on XPD-CPA relation 层状雨和对流雨中雨滴形态、大小和倾斜角分布:若干实例及其对XPD-CPA关系的影响
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552528
M. Thurai, V. Bringi, Gwo-Jong Huang
{"title":"Drop shape, size and canting angle Distributions in stratiform and convective rain: Some examples and their impact on XPD-CPA relation","authors":"M. Thurai, V. Bringi, Gwo-Jong Huang","doi":"10.1109/ANTEM.2010.5552528","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552528","url":null,"abstract":"1-minute drop size distributions in rain from measurements using 2D video disdrometer are used to identify stratiform and convective rain, and the respective drop shapes are examined separately. Canting angle distributions have also been determined in stratiform rain, under low wind conditions and confirmed independently using polarimetric radar based estimates. Studies are ongoing in this area.","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114260771","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}
引用次数: 0
A novel dual mode circular waveguide horn antenna 一种新型双模圆波导喇叭天线
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552570
Z. A. Pour, L. Shafai
{"title":"A novel dual mode circular waveguide horn antenna","authors":"Z. A. Pour, L. Shafai","doi":"10.1109/ANTEM.2010.5552570","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552570","url":null,"abstract":"Horn antennas have been used in diverse applications in communication systems, electromagnetic sensing, radio frequency heating, and antenna measurement, as well as feeds in lens and reflector antennas [1]. The application of pure-mode horn antennas is limited to array elements because of their poor electrical characteristics. In symmetric reflectors, an optimum feed must provide symmetric field patterns for both the field amplitude and phase to optimize the gain performance [2]. The corrugated conical horn is an example of this optimum feed [3]. Another example is the multimode horn antenna. Potter [4] designed a dualmode horn antenna to provide low sidelobe levels and symmetric patterns. Koch designed a multimode coaxial feed to optimize the spillover and the aperture efficiency of reflector antennas [5]. The applications of multi-mode horns are not limited to feeds in symmetric reflectors as the higher order modes can be appropriately combined to illuminate an offset reflector antenna to cancel or decrease the crosspolarization level, as reported in [6–8].","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121951414","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}
引用次数: 7
Dielectric boundary conditions with the meshless radial point interpolation method 介质边界条件的无网格径向点插值法
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552474
Yiqiang Yu, Z. Chen
{"title":"Dielectric boundary conditions with the meshless radial point interpolation method","authors":"Yiqiang Yu, Z. Chen","doi":"10.1109/ANTEM.2010.5552474","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552474","url":null,"abstract":"A systematic approach to incorporating dielectric boundary conditions in the meshless Radial Point Interpolation Method (RPIM) is presented in this paper. In the standard RPIM method, direct implementation of dielectric interface boundary conditions has posed a technical challenge as the radial basis function used for the local interpolation of field values is a continuous and smooth. Since field quantities may be discontinuous across a dielectric interface, a new set of RPIM equations for the updates of field variables at the dielectric interfaces are derived where continuous electric flux densities are computed instead of electric fields. Numerical results show that the simulation accuracy of the RPIM is significantly improved with small extra computational overhead.","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"86 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127992643","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}
引用次数: 2
A novel design of circularly polarized sectoral M-PRS antenna 圆极化扇形M-PRS天线的一种新设计
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552495
M. Hajj, T. Monediere, B. Jecko, R. Chantalat
{"title":"A novel design of circularly polarized sectoral M-PRS antenna","authors":"M. Hajj, T. Monediere, B. Jecko, R. Chantalat","doi":"10.1109/ANTEM.2010.5552495","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552495","url":null,"abstract":"A novel circularly polarized sectoral antenna on a Metallic Partially Reflective Surface (M-PRS) for wireless application within [5.15–5.35] GHz is proposed. By using double layers of M-PRS working on orthogonal polarizations as a superstrate with a single patch feeding by two ports, circular polarization is achieved. This antenna provides two perpendicular polarizations, vertical and horizontal, circular with a sectoral radiation pattern in the azimuth plane. The details of simulation results for the proposed design are presented and discussed.","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125476528","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}
引用次数: 2
Slant path rain attenuation synthesizers for tropical and equatorial regions 用于热带和赤道地区的倾斜路径雨水衰减合成器
2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference Pub Date : 2010-07-05 DOI: 10.1109/ANTEM.2010.5552393
M. Rodrigues, L. Mello, M. Pontes, G. Carrie, L. Castanet
{"title":"Slant path rain attenuation synthesizers for tropical and equatorial regions","authors":"M. Rodrigues, L. Mello, M. Pontes, G. Carrie, L. Castanet","doi":"10.1109/ANTEM.2010.5552393","DOIUrl":"https://doi.org/10.1109/ANTEM.2010.5552393","url":null,"abstract":"In tropical and equatorial areas, the terrestrial telecommunications infrastructure is less developed than in temperate regions and there is a strong need to implement satellite communication systems in the next few years. These systems have the advantage of serving wide regions with a short deployment time and the possibility to reach a large market size for economic profitability. For new consumer applications, C-band is unattractive because the deployment of new systems with small terminals is incompatible with the large antennas required to protect the existing systems.","PeriodicalId":161657,"journal":{"name":"2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121407321","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}
引用次数: 4
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