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1998 Symposium on Antenna Technology and Applied Electromagnetics最新文献

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The evolution network of resonance structures 共振结构的演化网络
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861745
E. Nefyodov
{"title":"The evolution network of resonance structures","authors":"E. Nefyodov","doi":"10.1109/ANTEM.1998.7861745","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861745","url":null,"abstract":"A history of evolution of resonance structure theory and technique for microwave and millimeter-wave bands at 20-th century is considered. We will attend predominantly for two classes of resonance structures, namely: a) closed resonators (fig. 1); b) opened resonators (fig. 2); c) resonators with “nonfocusing” mirrors (fig. 3–6).","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121424764","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
Dielectric resonator antennas for SAR applications SAR应用的介电谐振器天线
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861686
D. Cheng, G. Séguin, Y. Antar
{"title":"Dielectric resonator antennas for SAR applications","authors":"D. Cheng, G. Séguin, Y. Antar","doi":"10.1109/ANTEM.1998.7861686","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861686","url":null,"abstract":"Over the last decade, considerable interest has been focused on the study of dielectric resonator antennas (DRAs). Recent studies have shown that DRAs exhibit wider impedance bandwidth, no surface wave, less conductor losses and smaller size when compared with microstrip patch antennas. These properties make them attractive for consideration for SAR antenna applications.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121493896","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 of broadband multi-stage microwave amplifiers using optimization approach 宽带多级微波放大器的优化设计
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861786
F. Tavakkol-Hamedani
{"title":"Design of broadband multi-stage microwave amplifiers using optimization approach","authors":"F. Tavakkol-Hamedani","doi":"10.1109/ANTEM.1998.7861786","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861786","url":null,"abstract":"Introducing a new power gain named as unilateral power gain, an efficient optimization approach for designing broadband multi-stage microwave amplifiers is presented. Using this approach a broadband microwave amplifier is designed and the results are shown.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122986180","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 of a 60 GHz subharmonic mixer MMIC 60 GHz次谐波混频器MMIC的设计
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861792
C. J. Verver, T. Laneve, M. Stubbs
{"title":"Design of a 60 GHz subharmonic mixer MMIC","authors":"C. J. Verver, T. Laneve, M. Stubbs","doi":"10.1109/ANTEM.1998.7861792","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861792","url":null,"abstract":"The design of a subharmonically pumped (SHP), monolithic microwave integrated circuit (MMIC) mixer for future wireless communications applications is described. The mixer uses an anti-parallel diode pair to achieve frequency translation by mixing the RF signal with the second harmonic of the fundamental LO pump. The circuit was fabricated by Triquint Semiconductor Inc. using their GaAs MMIC PHEMT process. The overall chip size is 1.2 mm × 1.3 mm. Measured conversion loss is 13 dB with a 61 GHz RF input signal and RF port return loss is better than 10 dB over a 61.4 to 62.5 GHz frequency range. Simulation predicts a conversion loss of 13 dB over 59 to 61 GHz band and an RF port return loss of better than 10 dB over this range. The simulated 1-dB compression point occurs with an RF input power level of 5 dBm.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"10 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126198522","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
A photo-conductive microwave switch 一种光导微波开关
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861709
P. Grant, M. Denhoff, M. Gao, R. Mansour
{"title":"A photo-conductive microwave switch","authors":"P. Grant, M. Denhoff, M. Gao, R. Mansour","doi":"10.1109/ANTEM.1998.7861709","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861709","url":null,"abstract":"While this work is completely concerned with a semiconductor switch, the origin of the requirement was based on hybrid superconductive/semiconductive electronics. High temperature superconductivity (HTS) allows planar microwave circuits to be built with performance levels not possible with conventional thin film materials. By combining HTS elements with semiconductor elements it is now possible to consider building highly integrated microwave systems for example, a hybrid superconductive/semiconductive receiver has been demonstrated[1]. There are significant performance advantages to be realized by cooling the semiconductive components, particularly lower noise and higher gain. However, power dissipation becomes a very critical concern since all power dissipated in the device must be extracted by a cooling system that is an expensive part of any HTS system. Power dissipation is a key factor in choosing a switch device for a hybrid system.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127435438","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 coplanar Ka-band balanced common-gate amplifier in 0.8 μm GaAs mesfet 0.8 μm GaAs介面共面ka波段平衡共门放大器
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861771
P. Shearing, A. Freundorfer, Y. Antar
{"title":"A coplanar Ka-band balanced common-gate amplifier in 0.8 μm GaAs mesfet","authors":"P. Shearing, A. Freundorfer, Y. Antar","doi":"10.1109/ANTEM.1998.7861771","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861771","url":null,"abstract":"A balanced amplifier utilizing 0.8 μm MESFET common-gate (CG) transistors was demonstrated to provide 6 dB of gain at 30 GHz and a 3 dB bandwidth of 3.5 GHz. The power at 1 dB gain compression was 9.67 dBm for the amplifier. The amplifier also demonstrated unconditional stability over the full frequency range. To our knowledge, this is the highest frequency amplifier with gain ever demonstrated with a process of this kind.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129307511","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
Measurement characterization of 37.2GHz indoor radio channels in terms of antenna radiation patterns and threshold levels 37.2GHz室内无线电信道在天线辐射方向图和阈值水平方面的测量特性
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861780
L. Talbi, G. Delisle, K. Hettak
{"title":"Measurement characterization of 37.2GHz indoor radio channels in terms of antenna radiation patterns and threshold levels","authors":"L. Talbi, G. Delisle, K. Hettak","doi":"10.1109/ANTEM.1998.7861780","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861780","url":null,"abstract":"In order to construct efficient communication systems for indoor radio networks and personal communication network (PCN) systems, a great deal of effort has been expended and considerable quantities of information obtained on the propagation of radio transmissions, mostly in the form of experimental measurements. This paper intends to add some experimental results conducted at 37.2GHz and aiming the investigation of the effect of the antenna radiation patterns on the indoor line of sight propagation channel. For narrowband results, cumulative distribution functions for the received signal envelope are given to determine multipath characteristics in a number of indoor microcell channels employing directional and omnidirectional antennas. A model for assessment of the unit-cell size, based on experimental data, is reported. In addition, wideband results have been performed using the same type of antennas and the RMS delay spreads have been obtained for different threshold levels.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131041978","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
On the repeated solution of matrix equations in imaging techniques 成像技术中矩阵方程的重复解
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861688
I. Ciric
{"title":"On the repeated solution of matrix equations in imaging techniques","authors":"I. Ciric","doi":"10.1109/ANTEM.1998.7861688","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861688","url":null,"abstract":"In various imaging procedures or in linear optimization it is necessary to solve large systems of linear algebraic equations with a few equations being changed many times. Once a complete solution of an n × n system is obtained by applying a classical Gaussian elimination method [1]-[4], for instance, the updated solution of the system, when its last equation is changed, requires 2n2 arithmetic operations for large systems.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115584573","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
Small spiral-loaded antenna 小型螺旋加载天线
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861744
H. Nakano, H. Mimaki, M. Sugama, J. Yamauchi, K. Hirose
{"title":"Small spiral-loaded antenna","authors":"H. Nakano, H. Mimaki, M. Sugama, J. Yamauchi, K. Hirose","doi":"10.1109/ANTEM.1998.7861744","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861744","url":null,"abstract":"Recently, we have analyzed a spirally-wound antenna [1][2] proposed by Fenwick using the method of moments. The analysis shows that the. input impedance is very low (less than 4 ohms). It is also shown that the frequency bandwidth is very narrow (less than 0.2% for a criterion of VSWR = 2 to an input resistance at resonance). In this paper, we realize higher input resistance over a wider frequency band than the Fenwick's antenna. For this, a relatively small spiral-loaded antenna, proposed in Fig. 1, is analyzed. The radiation characteristics are presented and discussed.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124309118","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
An integrated receiver for wireless applications 用于无线应用的集成接收器
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861702
B. Frank, M. Keller, H. Hammad, P. Shearing, A. Freundorfer, Y. Antar
{"title":"An integrated receiver for wireless applications","authors":"B. Frank, M. Keller, H. Hammad, P. Shearing, A. Freundorfer, Y. Antar","doi":"10.1109/ANTEM.1998.7861702","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861702","url":null,"abstract":"This paper will present the development of a 30GHz integrated receiver for wireless applications. The purpose is to demonstrate the feasibility of implementing such a device as a monolithic microwave integrated circuit (MMIC) using an inexpensive and readily available technology, a 0.8 μm MESFET process. The receiver module consists of a broadband antenna, a 30 GHz balanced common gate amplifier, a single balanced downconvert mixer, and a 28 GHz dielectric resonator oscillator. Simulations using HP Libra Series IV indicate the conversion of an RF signal at 30 GHz to a signal at 2 GHz with an estimated conversion loss of 2 dB and a noise figure of 13 dB.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121377613","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
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