摘要:
本文采用一種振子型合成元作為陣元組成圓陣天線,通過一組加權,可控制陣中所有的元方向圖型都指向預先任意規(guī)定的相控方向。這在全向范圍內,任何方向都能形成強定向波束,以有效地獲取有用信號。在此基礎上,本文通過引入等效干擾源的概念,把Gabriel的各向同性元自適應直線陣理論擴展應用到有向元圓陣,對單元方向可控自適應圓陣專題進行了研究。它包括:陣遠區(qū)輻射圖型;單元方向可控圓陣系統(tǒng)輸入?yún)f(xié)方差矩陣的導出;單元方向可控自適應圓陣輻射圖型正交分解;陣系統(tǒng)輸出噪聲瞬態(tài)特性公式。
Abstract:
In this paper the element pattern-steerable adaptive circular arrays are described. The element consists of three-orthogonal dipoles. All the element radiation patterns in the array can be steered by a set of weightings to point to an arbitrary specified direction. Thus a high directional beam in an arbitrary directional position within a 3-dimensional space can be formed to capture a desired signal effectively. On the above basis the techniques of the adaptive linear array of uniformly spaced isotropic element investigated by W.F.Gabriel are generalized to the special topic of the element patternsteerable adaptive circular arrays by means of the concept of equivalent interference source. This paper discusses following theoretical aspects of the said arrays: the array farzone radiation field, the direction-controlled weighting factors of the element radiation pattern, the covariance matrix of the set of system inputs, the orthogonal resolution of the array output pattern, the transient characteristic for total output noise power of the array system.
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