A Low-Profile Distributed Conformal Phased Array Antenna with Hemispherical Beam Coverage

2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting Pub Date : 2020-07-05 DOI:10.1109/IEEECONF35879.2020.9329756

Hong Sheng Lin, Y. Cheng

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引用次数: 3

Abstract

A novel low-profile distributed conformal phased array antenna (DCPAA) with hemispherical beam coverage is presented in this paper. All conventional spherical phased array antennas (SPAAs) have large beam coverage but high profile because of their spherical carrier. In this design, the proposed low-profile DCPAA is reconfigured by readjusting positions and directions of some antenna elements on the conventional SPAA symmetrically. Elements in distributed areas of the DCPAA cooperate to realize the distributed virtual aperture synthesis. In this case, the low-profile DCPAA can roughly keep the original effective radiation aperture of the SPAA and their performances are almost the same. Thus, the profile of the proposed DCPAA is 44.45% lower than that of the SPAA. In addition, the gain flatness of the low-profile DCPAA is as same as that of the SPAA (1.3 dB) within hemispherical beam coverage. Moreover, the DCPAA has only 0.5 dB gain loss within the scanning range compared with the SPAA.

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半球形波束覆盖的低轮廓分布共形相控阵天线

提出了一种具有半球形波束覆盖的低轮廓分布共形相控阵天线。传统的球形相控阵天线由于采用球形载波结构，具有较大的波束覆盖范围和较高的姿态。在本设计中，通过对称地调整传统SPAA上一些天线元件的位置和方向，对所提出的低姿态DCPAA进行重新配置。dpaa分布区域内的元件相互协作，实现分布式虚拟孔径合成。在这种情况下，低轮廓dpaa可以大致保持SPAA原有的有效辐射孔径，两者的性能基本相同。因此，拟议的DCPAA的剖面比SPAA低44.45%。此外，在半球形波束覆盖范围内，低轮廓dpaa的增益平坦度与SPAA相同(1.3 dB)。此外，与SPAA相比，DCPAA在扫描范围内的增益损失仅为0.5 dB。

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2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting

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