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Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)最新文献

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Formulating wideband array-pattern optimizations 制定宽带阵列方向图优化
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-25 DOI: 10.1109/PAST.2000.859003
D. Scholnik, J. Coleman
{"title":"Formulating wideband array-pattern optimizations","authors":"D. Scholnik, J. Coleman","doi":"10.1109/PAST.2000.859003","DOIUrl":"https://doi.org/10.1109/PAST.2000.859003","url":null,"abstract":"Custom design of wideband digital array patterns requires a systematic approach to mapping design specifications to a program understandable by optimization engines. We show that, as in the narrowband case, wideband array patterns are closely related to multidimensional FIR filter responses, suggesting the adaptation of powerful and efficient filter design techniques to the array problem. Previously reported FIR filter design techniques are then applied to an example array-pattern design.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126274026","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: 29
Photonics for airborne phased array radars 机载相控阵雷达光子学
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858979
D. Dolfi, D. Mongardien, S. Tonda, M. Schaller, J. Chazelas
{"title":"Photonics for airborne phased array radars","authors":"D. Dolfi, D. Mongardien, S. Tonda, M. Schaller, J. Chazelas","doi":"10.1109/PAST.2000.858979","DOIUrl":"https://doi.org/10.1109/PAST.2000.858979","url":null,"abstract":"In future generation phased array radars, signal distributions will have to fulfil strict performance criteria. These include high isolation from both electromagnetic interference and crosstalk between module or subarray feeds with increased instantaneous bandwidths, dramatic reduction in size and weight with respect to current radars, and performance compatible with growing requirements such as low phase noise and high dynamic range. Photonics and microwave technologies offers new opportunities for controlling many thousands of array elements together with handling the wide bandwidth of shared aperture antennas. Photonics technologies will provide an interconnect solution for future airborne phased array radar antennas, which have conformality, bandwidth, EMI immunity, size,and weight requirements increasingly difficult, if not impossible, to meet using conventional electrical interconnect methods. Future system requirements are reported together with results of newly developed high performance wideband analog microwave links and of demonstrated approaches for true time delay architectures.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123441632","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: 17
Closed-loop beam forming experiment for an onboard phased array fed reflector antenna 星载相控阵馈电反射面天线的闭环波束形成实验
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858919
Y. Imaizumi, S. Harada, M. Shimizu, K. Yamamoto, K. Araki
{"title":"Closed-loop beam forming experiment for an onboard phased array fed reflector antenna","authors":"Y. Imaizumi, S. Harada, M. Shimizu, K. Yamamoto, K. Araki","doi":"10.1109/PAST.2000.858919","DOIUrl":"https://doi.org/10.1109/PAST.2000.858919","url":null,"abstract":"This paper describes the beamforming procedure for phased array fed reflector antennas and gives the results of a beamforming experiment for a receiving phased array fed reflector antenna. In the experiment, the main beams are aimed at two target directions. The results indicate that the procedure adequately compensates for the mechanical errors of the reflector, alignment errors of the antenna system, and phase and amplitude errors of the BFN. The experimental results confirm the effectiveness of the proposed beamforming procedure and algorithm.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116002600","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
Constant elevation pattern notch design in a rectangular phased array having a triangular lattice 具有三角形晶格的矩形相控阵中的恒定仰角图样缺口设计
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858958
J. Mulcahey, Kaichang Chang
{"title":"Constant elevation pattern notch design in a rectangular phased array having a triangular lattice","authors":"J. Mulcahey, Kaichang Chang","doi":"10.1109/PAST.2000.858958","DOIUrl":"https://doi.org/10.1109/PAST.2000.858958","url":null,"abstract":"When designing the aperture distribution for a constant elevation pattern notch in a rectangular, planar phased array with a triangular lattice, the designer may be tempted to set the excitation of each element individually, based on sampling a desired continuous distribution at each element's unique location. It can be shown that for some types of aperture distributions, such as a principal-plane notch on one side of the main beam, this can cause unacceptable lobes to appear away from the principal planes. The resolution to this problem is to first generate the distribution for the elements in one (odd) column, and then directly apply these excitations to the elements in the adjacent (even) column. This has the effect of increasing the periodicity of sidelobe features in k-space, which causes a notch to appear in the sidelobe structure of the grating lobes at the desired location.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129034681","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
Design of the cross-dipole antenna with near-hemispherical coverage in finite-element phased array by using genetic algorithms 基于遗传算法的有限元相控阵近半球形交叉偶极子天线设计
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858961
Cheng-Nan Hu, Ching-Song Chuang, Der-Chorng Chou, Koong-Jeng Liu, C. Hung
{"title":"Design of the cross-dipole antenna with near-hemispherical coverage in finite-element phased array by using genetic algorithms","authors":"Cheng-Nan Hu, Ching-Song Chuang, Der-Chorng Chou, Koong-Jeng Liu, C. Hung","doi":"10.1109/PAST.2000.858961","DOIUrl":"https://doi.org/10.1109/PAST.2000.858961","url":null,"abstract":"A cross-dipole antenna surrounded by four pins is used as a radiating element for a finite-element phased array. To achieve near-hemispherical radiation coverage and high gain under the consideration of mutual coupling effects, a method using genetic algorithms to optimize the design parameters of a cross-dipole antenna is presented. A method of moment code performs the task of evaluating each of the antenna designs generated by the genetic algorithm (GA) during the optimization process. To illustrate the capabilities of this approach, the numerical results are compared to the measured ones, showing excellent agreement in the comparison.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116262315","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: 11
Optically controlled phased-array antenna using wavelength-selective true time delay 波长选择性真时延光控相控阵天线
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858976
B. Jalali, S. Yegnanarayanan
{"title":"Optically controlled phased-array antenna using wavelength-selective true time delay","authors":"B. Jalali, S. Yegnanarayanan","doi":"10.1109/PAST.2000.858976","DOIUrl":"https://doi.org/10.1109/PAST.2000.858976","url":null,"abstract":"A novel all-optical tunable optical delay line device is used as a true-time-delay generator for squint-free beam steering in optically-controlled microwave phased-array antennas. The mapping of optical wavelength to the microwave beam direction permits a hardware efficient architecture for the optical control unit that can easily scale to large aperture antenna arrays. The performance of a complete optically controlled phased array antenna system employing such single-chip time-delay devices is reported. Extension to two-dimensional antenna arrays with independent control of azimuth and elevation by using mid-stage optical wavelength conversion is proposed and demonstrated. An optical true-time-delay steered two-element X band antenna was assembled to verify the wide instantaneous bandwidth operation.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126199406","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: 5
Effects of amplifier nonlinearities on DOA estimation 放大器非线性对DOA估计的影响
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858934
J. Yin, Y. Lu, B. P. Ng
{"title":"Effects of amplifier nonlinearities on DOA estimation","authors":"J. Yin, Y. Lu, B. P. Ng","doi":"10.1109/PAST.2000.858934","DOIUrl":"https://doi.org/10.1109/PAST.2000.858934","url":null,"abstract":"This article presents the study of the nonlinear effects of amplifier gain compression and intermodulation on the accuracy of direction of arrival (DOA) in a digital array receiving system. Based on analysis and realistic computer simulation, it is shown that the gain compression has little effect on DOA estimation but the third-order intermodulation may significantly degrade DOA estimation.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121935706","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
Digital beamforming in a compact 20-32 MHz radar 紧凑型20-32 MHz雷达中的数字波束形成
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858929
R. Dinger, E. Nelson, R. L. Powers
{"title":"Digital beamforming in a compact 20-32 MHz radar","authors":"R. Dinger, E. Nelson, R. L. Powers","doi":"10.1109/PAST.2000.858929","DOIUrl":"https://doi.org/10.1109/PAST.2000.858929","url":null,"abstract":"Most current research and development programs in the field of digital beamforming are concerned with systems that operate in the traditional microwave frequency bands or higher. This paper discusses digital beamforming in a novel high frequency (HF) radar that operates from 20 to 32 MHz. Under the STEEL TRAP sensor program of the Department of Defense, we developed a semi-portable HF radar to measure the scattering properties of air targets. Earlier semi-portable HF radars, as well as most skywave HF radars, have used analog beamforming and frequency-modulated continuous wave (FMCW) waveforms. The STEEL TRAP HF radar (STHFR) radiates a pulsed waveform and has an eight-element receiving array that forms beams digitally. This paper describes the beamforming approach and the technique used for determining target angular position, and presents examples taken from a series of scattering measurements of a sounding rocket.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127924074","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
Focuser-based hybrid antennas for one-dimensional beam steering 基于聚焦器的一维波束控制混合天线
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858986
A. S. Reutov, A. Shishlov
{"title":"Focuser-based hybrid antennas for one-dimensional beam steering","authors":"A. S. Reutov, A. Shishlov","doi":"10.1109/PAST.2000.858986","DOIUrl":"https://doi.org/10.1109/PAST.2000.858986","url":null,"abstract":"In this paper, an approach to the synthesis of FHA for limited field of view in one plane is developed. From the considered examples, it can be seen that in the case of limited field of view, the FHA allows us to appreciably reduce the feed array size and the controlled element number as compared with the HA with parabolic cylindrical reflector. The considered approach to FHA synthesis can be generalized in several directions: (a) offset system with no blockage, (b) dual-reflector system with ordinary (commercial) main parabolic reflector and a small focuser-subreflector, (c) HA with a divergent reflector for extended field of view, etc.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130763074","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
Locator with super-scanning phased array and its basic features 超扫描相控阵定位器及其基本特点
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510) Pub Date : 2000-05-21 DOI: 10.1109/PAST.2000.858936
V. Ginzburg
{"title":"Locator with super-scanning phased array and its basic features","authors":"V. Ginzburg","doi":"10.1109/PAST.2000.858936","DOIUrl":"https://doi.org/10.1109/PAST.2000.858936","url":null,"abstract":"The locator (tomograph) with super-scanning phased array antenna has the following basic unique possibilities: optimal energy distribution and resolving power in the surveyed space redistribution; reception of contour object's images in the far (Fraunhofer) zone with linear resolution independent of distance; super-resolution of objects in a group within visibility layers due to intentional increase of interval between reflected signals; increase of potential of the locator due to redistribution of the energy in the survey zone. It is shown that the locator with super scanning phased array antenna can be adaptive. This possibility can decrease vastly the total energy radiated into the atmosphere, in comparison with existing radars and lidars, i.e., can decrease the warming of the atmosphere.","PeriodicalId":278152,"journal":{"name":"Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131144988","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
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