一種利用幅值抖動形成陣列零陷的方法

曾云寶; 黃才試; 彭濤; 王文博

一種利用幅值抖動形成陣列零陷的方法

計量
- 文章訪問數(shù): 2266
- HTML全文瀏覽量: 88
- PDF下載量: 898
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2005-04-11
- 修回日期: 2005-08-30
- 刊出日期: 2006-11-19

Array Pattern Nulling by Amplitude-Only Perturbations

摘要

摘要: 該文提出了一種在陣元關(guān)于陣列中心對稱的線陣中利用幅值抖動形成零陷的方法，該方法能夠在多個強(qiáng)干擾源方向或在較寬的范圍形成深度零陷, 而不影響主瓣, 同時克服了傳統(tǒng)幅值抖動方法零陷深度不足、旁瓣水平高的缺陷。該方法使得移相器只需用來控制主瓣方向, 加快了響應(yīng)速度。仿真表明，該算法實(shí)現(xiàn)簡單，且其性能可與復(fù)權(quán)值控制方法的性能相比。同時由于幅度抖動的對稱性, 在中心對稱的線陣中只需要天線數(shù)目一半的衰減器, 成本較低。
- 幅值抖動; 零陷; 衰減器
Abstract: A new method based on amplitude-only perturbations for the pattern synthesis of linear antenna array with prescribed nulls is proposed. It is capable of steering narrow and broad nulls with satisfactory nulls depth in the directions of strong interference signals and acceptable sidelobe level in the beam pattern without affecting the main beam. The phase shifters are only used to steer the main beam toward the desired direction. In so doing, the responsed time can be reduced. Simulation results show that this method is easier to realize, and its capability is comparable to that of controlling complex weights (both amplitude and phase). Besides, the fact that the amplitude perturbations of the elements are symmetrical about the center of the array means that the amount of attenuators is halved.

HTML全文

參考文獻(xiàn)(1)

Steyskal H, Shore R A, Haupt R L. Methods for null control and their effects on the radiation pattern. IEEE Trans. on Antennas Propagation, 1986, AP-34(3): 404- 409.[2]Shore R A. Nulling a symmetric pattern location with phase-only weight control. IEEE Trans. on Antennas and Propagation, 1984 AP-32(5): 530533.[3]Ismail T, Dawoud M. Null steering in phased arrays by controlling the elements positions[J].IEEE Trans. on Antennas Propagation.1991, 39(11):1561-1566[4]Hejres J, Richie J. Adaptive pattern nulling utilizing the elevations of the antenna array elements. Antennas and Propagation Society International Symposium, 1993, AP-S(28): 694 - 697.[5]Steyskal H. Simple method for pattern nulling by phase perturbation. IEEE Trans. on Antennas Propagation, 1983, AP-31(1): 163-166.[6]Steyskal H. Wide-band nulling performance versus number of pattern constraints for an array antenna. IEEE Trans. on Antennas and Propagation, 1983, AP-31(1): 159163.[7]Shpak D J. A method for the optimal pattern synthesis of linear arrays with prescribed nulls. IEEE Trans. on Antennas and Propagation, 1996, AP-44(3): 286294.[8]Er M H. Technique for antenna array pattern synthesis with[9]controlled broad nulls. IEE Proc[J].Microwave Antennas and Propagation.1988, 135(6):375-[10]Er M H. Linear antenna array pattern synthesis with prescribed broad nulls. IEEE Trans. on Antennas and Propagation, 1990, AP-38(9): 14961498.[11]Guney K, Akdagl A. Null steering of linear antenna arrays using modified Tabu search algorithm. in Book Series of Progress in Electromagnetics Research, Kong J A (Editor), 2001, 33: 167182.[12]Vu T B. Method of null steering without using phase shifters. IEE Proc.- H, 1984, 131: 242 246.[13]VU T B. Null steering by controlling current amplitude only. antennas and propagation society international symposium, 1984, 22: 811814.[14]VU T B. Pattern nulling in difference pattern by amplitude control. IEEE Trans. on Antennas and Propagation, 1985, AP-33( 6): 669 - 671.[15]Hosny M, Ibrahim. Null steering by real-weight controlA method of decoupling the weights. IEEE Trans. on Antennas and Propagation, 1991 AP-39(11): 1648 1650.[16]Liao W P, Chu F L. Array pattern synthesis with null steering using genetic algorithms by controlling only the current amplitudes[J].Int. J. Electronics.1999, 86:445-

相關(guān)文章

施引文獻(xiàn)

資源附件(0)

訪問統(tǒng)計