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首页> 外文期刊>IEEE Transactions on Antennas and Propagation >A Low-Cost Ka-Band Circularly Polarized Passive Phased-Array Antenna for Mobile Satellite Applications
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A Low-Cost Ka-Band Circularly Polarized Passive Phased-Array Antenna for Mobile Satellite Applications

机译：用于移动卫星应用的低成本 Ka 波段圆极化无源相控阵天线

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摘要

This paper presents a low-profile, high-performance, and low-cost Ka-band circularly polarized (CP) passive phased-array antenna (PAA) system. A 1 x 4 passive subarray operating at the Ka-band frequency band is investigated, developed, and tested as a possible building block for mobile satellite communication systems. In particular, a CP antenna integrated with a high-performance passive phase shifter is presented and experimentally verified. A new low-cost and low-profile magnetic actuator is proposed to precisely control the phase state of the phase shifter. A 3-D printed polymer package is utilized to enclose the phase shifter and reduce the environmental effects. The proposed CP passive PAA achieves high-performance right-hand CP radiation with high cross-polarization discrimination over a wide scan angle from 0 degrees to +/- 38 degrees over the frequency band (29.5-30.5 GHz). An axial ratio (AR) < 3 dB is demonstrated over the entire scanning range. Moreover, the measured radiation efficiency is 60% at boresight. The gain drops by 1 dB at +/- 38 degrees scanning angles.
机译：本文提出了一种低调，高性能，低成本的Ka波段圆极化（CP）无源相控阵天线（PAA）系统。研究，开发和测试了在Ka频段工作的1 x 4无源子阵列，将其作为移动卫星通信系统的可能构件。特别是，提出并通过实验验证了集成有高性能无源移相器的CP天线。提出了一种新型的低成本，薄型的磁致动器，以精确控制移相器的相位状态。利用3-D印刷聚合物封装来封装移相器并减少环境影响。拟议中的CP无源PAA在频带（29.5-30.5 GHz）上从0度到+/- 38度的宽扫描角上实现了具有高交叉极化辨别力的高性能右侧CP辐射。在整个扫描范围内，轴比（AR）<3 dB。此外，在视轴上测得的辐射效率为60％。在+/- 38度的扫描角度下，增益下降1 dB。

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