基于焦面场的多波束反射面天线二维DOA估计

doi:10.3969/j.issn.1001-506X.2020.01.04

Abstract

Abstract:

It is one of the important design processes in multi-beam reflector antennas to detect the direction of the interference signals by the two-dimensional direction of arrival (DOA) estimation algorithm with dense-focal-plane array feed. Because the signal received by elements of the dense-focal-plane array is determined by the focal-plane electric field of source signals, the array manifold of array feed is different from that of the conventional DOA planar array. The focal-plane field usually distributes uniformly; consequently, the signal strengths of array elements are different among each other and some of them are weak. Different array elements are adopted for different focal-plane fields. As a result, the array structures are not fixed and always are irregular. The correlation between the received signals of array elements will decrease after the reflection of the source signals by the reflector. All these factors determine that the DOA estimation of array feed has special features, so a two-dimensional DOA estimation method combining the focal-plane field for the multi-beam reflector antenna is proposed, and the simulation results validate its effectiveness and practicability.

Key words: direction of arrival (DOA) estimation, focal-plane field, multi-beam reflector, dense focal-plane array feed

CLC Number:

TN823

Shanhong HE, Mengqian JI, Liangyu XIE, Jin FAN. Two-dimensional DOA estimation for multi-beam reflector antenna based on focal-plane field[J]. Systems Engineering and Electronics, 2020, 42(1): 23-29.

Figures/Tables 6

References 30

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Two-dimensional DOA estimation for multi-beam reflector antenna based on focal-plane field

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