摘要： 为了满足星载Ka波段相控阵天线瞬时工作带宽大、同时多波束的需求，设计了一种基于子阵内相移和子阵间延迟的宽带模拟多波束相控阵天线。设计的28×28单元阵列分为4个子阵列结构，子阵列内的每个单元使用移相器，子阵列之间使用延迟线。这种移相器和延迟线的组合控制方案可以实现相控阵天线的宽带广角扫描。仿真结果表明，在800 MHz的瞬时工作带宽和±54°的扫描角下，所提出的天线的指向精度偏差不超过0.4°，增益恶化不超过0.5 dB。同时，采用封装天线（AiP）架构实现了天线的轻薄化、集成化，适用于宽带多波束星载相控阵天线的设计。

中图分类号：TN86 文献标志码：A DOI: 10.16157/j.issn.0258-7998.244901
中文引用格式： 何凌云，梁宇宏. 宽带多波束星载相控阵天线技术[J]. 电子技术应用，2024，50(6)：77-83.
英文引用格式： He Lingyun，Liang Yuhong. Wideband multi-beam technology for satellite-borne phased array antennas[J]. Application of Electronic Technique，2024，50(6)：77-83.

Wideband multi-beam technology for satellite-borne phased array antennas

Abstract： To meet the requirements of large instantaneous operating bandwidth and simultaneous multi-beams of the satellite-borne Ka-band phased array antenna, a wideband analog multi-beam phased array antenna based on intra-subarray phase shift and inter-subarray delay is designed. The designed 28×28 unit array is divided into four subarray structures, with phase shifters used for each unit within the subarrays and delay lines used between the subarrays. This combined control scheme of phase shifters and delay lines can achieve wide-band and wide-angle scanning of phased array antennas. The simulated results show that, at an instantaneous operating bandwidth of 800 MHz and a scanning angle of ± 54°, the pointing accuracy deviation of the proposed antenna is no more than 0.4°, and the gain deterioration is no more than 0.5 dB. At the same time, the Antenna-in-Package (AiP) architecture is used to achieve the lightness, thinness, and integration of antennas, which is suitable for the design of wideband multi-beam satellite-borne phased array antennas.

Key words : wideband；multi-beam；satellite-borne phased array