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Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]最新文献

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Probabilistic approach for evaluating multiconductor transmission lines coupling 评估多导体传输线耦合的概率方法
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851687
V. Kontorovich, R. M.
{"title":"Probabilistic approach for evaluating multiconductor transmission lines coupling","authors":"V. Kontorovich, R. M.","doi":"10.1109/ANTEM.2000.7851687","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851687","url":null,"abstract":"An analytic method to probabilistically predict the electromagnetic coupling in multiconductor transmission lines is described. This method is based on the a priori application of minimum information (maximum entropy method MEM) of the random properties of the geometry of the multi conductor transmission lines and of the excitation signals. This model was used to analyze the electromagnetic coupling a printer circuit board with two microstrip on a ground plane, it is the typical three conductors transmission line. The results show that the proposal gives a good superior limit for the values of the electromagnetic coupling within 3dB.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125211406","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 consideration on beam-shaping of microstrip array antenna 微带阵列天线波束整形问题的思考
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851747
J. Yahagi, M. Haneishi
{"title":"A consideration on beam-shaping of microstrip array antenna","authors":"J. Yahagi, M. Haneishi","doi":"10.1109/ANTEM.2000.7851747","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851747","url":null,"abstract":"In this paper. we presented a basic design technique for and a radiation properties of the shaped-beam planar array composed of MSA elements. Experimental results showed. that the antenna has high performances in terms of both radiation patterns and return-loss characteristics.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116759355","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 comparison between N-type and P-type InP LHL IMPATT diodes n型和p型InP LHL impat二极管的比较
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851663
E. El-Badawy, S. H. Ibrahim, H. El-Motaafy
{"title":"A comparison between N-type and P-type InP LHL IMPATT diodes","authors":"E. El-Badawy, S. H. Ibrahim, H. El-Motaafy","doi":"10.1109/ANTEM.2000.7851663","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851663","url":null,"abstract":"This paper presents a comparison between the performance of N- and P-type InP IMPATT diodes. This is important to deeply understand the operation of these devices. For the P-type diodes, it is found that the operation is always according to the conventional IMPATT mode. The depletion-layer-width modulation is the main factor responsible for the lower efficiency. This effect causes the induced current to undergo a dip at the worst time in the cycle and delays the extraction of the carriers. It is indicated that the velocity-field characteristic of N-type InP material is the main factor responsible for the high-efficiency operation of N-type IMPATTs. During this high-efficiency operation, the avalanche-generated packet of electrons is bunched and accelerated. It may also be prematurely collected. This causes the induced current to have one or two additional peaks at the proper phase angles in the RF cycle.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120957623","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
Design and analysis of a microstrip fed dual-frequency planar printed antenna 微带馈电双频平面印刷天线的设计与分析
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851737
Ming-Sze Tong, Mingwu Yang, Yinchao Chen
{"title":"Design and analysis of a microstrip fed dual-frequency planar printed antenna","authors":"Ming-Sze Tong, Mingwu Yang, Yinchao Chen","doi":"10.1109/ANTEM.2000.7851737","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851737","url":null,"abstract":"A microstrip fed dual-frequency planar printed antenna (DF-PPA) is proposed. This antenna can operate in parallel at two distinct frequency bands that are commonly used in nowadays communication systems, viz., the GSM and DCS 1800, at the operating frequencies of 0.9 GHz and 1.8 GHz, respectively. To increase its compactness, the proposed antenna is operated in quart-wave mode by inserting the shorting strips, as well as a slot which separates the operating frequencies. The antenna has the advantages of being physically compact and easy to manufacture. A computer-aided design (CAD) tool, based on the Finite Difference Time Domain (FDTD) Maxwell solver, was employed in order to optimize the characteristics of the DF-PPA, including the return loss, the matching of the input impedance and the far-field radiation patterns.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126004873","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
The Probability Density Function for a sum of N linearly polarized time-harmonic plane waves N个线性极化时谐平面波和的概率密度函数
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851709
J. E. Roy
{"title":"The Probability Density Function for a sum of N linearly polarized time-harmonic plane waves","authors":"J. E. Roy","doi":"10.1109/ANTEM.2000.7851709","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851709","url":null,"abstract":"It is known that under the assumption that N phasors are statistically independent and stationary (which assumption leads to the Probability Density Function (PDF) for the phase of each phasor to be uniform over an interval of length 2π), the Blanc-Lapierre transformation gives the expression for the PDF of the magnitude of the sum of N phasors as a function of the PDF of the magnitude of each phasor. This expression, however, does not take into account the polarization, only the phase and magnitude of the field. This paper includes the polarization as well.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115515038","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
Floquet's Theorem application for the design of holographic antennas Floquet定理在全息天线设计中的应用
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851690
K. Levis, A. Ittipiboon, A. Petosa
{"title":"Floquet's Theorem application for the design of holographic antennas","authors":"K. Levis, A. Ittipiboon, A. Petosa","doi":"10.1109/ANTEM.2000.7851690","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851690","url":null,"abstract":"This paper describes the research and development of a holographic antenna designed based on Floquet's Theorem by treating the antenna as a periodically loaded traveling-wave structure. The general idea is to suppress two undesirable side lobes, thus improving the efficiency of the antenna, by increasing the thickness and permittivity of the dielectric slab on which the microstrip quasi-periodic grating is etched.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122836428","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
Helix Design for cylindrical helix antennas with matching sections 设计具有匹配截面的圆柱形螺旋天线
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851725
M. Slater, C. Trueman
{"title":"Helix Design for cylindrical helix antennas with matching sections","authors":"M. Slater, C. Trueman","doi":"10.1109/ANTEM.2000.7851725","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851725","url":null,"abstract":"A helix antenna must be designed to meet a performance specification: minimum gain, 3 dB beamwidth between a minimum and a maximum value; maximum axial ratio; and a frequency bandwidth over which these values must be maintained. A design consists of specifying the diameter, the pitch angle and the number of turns. A computer program called Helix Design is presented for developing specific designs for a helix antenna over an infinite ground plane. Assuming that the circumference of the helix is one wavelength in the center of the bandwidth, Helix Design identifies all combinations of pitch and turns that meet the specification. The enhanced version of Helix Design described in this paper lets the user terminate the helix with a tapered “matching section”, and compare the performance of helices without and with the matching section. The Helix Design program can create a movie of the antenna performance as a function of frequency over the specified bandwidth. Helix Design should help engineers to rapidly focus on the pitch and number of turns that can realize a particular specification.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114608874","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
Near-field radar cross section of complex structures 复杂结构的近场雷达截面
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851682
S. Kashyap, A. Louie, W. Chamma
{"title":"Near-field radar cross section of complex structures","authors":"S. Kashyap, A. Louie, W. Chamma","doi":"10.1109/ANTEM.2000.7851682","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851682","url":null,"abstract":"This paper concerns the computation of the near-field radar cross section (RCS) of a complex structure such as a ship or an aircraft. We develop a physical optics-based scheme that allows the computation and summation of reflections from different parts of a structure. These reflections arrive at different angles at the near-field observation point. This is in contrast to the far-field case where all the reflections arrive at the same angle at the observation point at infinity. We show the results of our computations for some simple canonical shapes, as well as some complex structures, and compare them with the results obtained from other methods.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129525480","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
Parametric studies on WAIM sheets for waveguide phased array antennas 波导相控阵天线波形片的参数化研究
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851720
Satish K. Sharma, A. Sebak, L. Shafai
{"title":"Parametric studies on WAIM sheets for waveguide phased array antennas","authors":"Satish K. Sharma, A. Sebak, L. Shafai","doi":"10.1109/ANTEM.2000.7851720","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851720","url":null,"abstract":"In this paper, the HFSS program is used to carry out a parametric study on WAIM sheets when used with phased array antennas. From the observation of parametric study results, it may be revealed that the selection of material, sheet thickness, and spacing need to be optimized for the optimum WAIM performance. The proposed empirical expression may be used to predict the probable location of the WAIM sheet spacing, S, for improving the performance of the WAIM sheet when used in front of phased arrays.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128220531","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
Fabrication of a microwave MEMS switch 微波MEMS开关的研制
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851661
M. Denhoff, P. Grant, M. Harry, M. Yu
{"title":"Fabrication of a microwave MEMS switch","authors":"M. Denhoff, P. Grant, M. Harry, M. Yu","doi":"10.1109/ANTEM.2000.7851661","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851661","url":null,"abstract":"We are developing a fabrication process for a microelectro-mechanical system (MEMS) microwave switch. Our aim is to make a switch that operates from dc to 40 GHz with low insertion loss and high isolation. The, electrostatically activated, switch is based on a coplanar waveguide design with a cantilever or bridge mounted contact to open and close the switch. The fabrication process is not reliable yet, but we have made a working switch with an on state insertion loss less than 0.3 dB and an off state isolation of 45 dB at 4 GHz. Material properties and mechanical design are important in the operation of the switch.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129153083","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
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