A highly integrated K/Ka-band phased array with duplexing channels for transmitting and dual circularly polarized channels for receiving is presented. To increase both the efficiency and channel isolation, a novel architecture is proposed to integrate the horn antenna, polarizer, ortho-mode transducer (OMT), and filters within a very compact radiating aperture as the element. Based on this element, one large-scale phased array with 416 elements was developed, fabricated, and measured. Experimental results show that the proposed phased array has high aperture efficiency of larger than 56% in both transmitting and receiving channels, high channel isolations of 50 dB between different frequency channels and 20 dB between different polarization channels. Furthermore, beam scanning performance within ±20° and ±18° at 20 and 30 GHz are achieved, respectively. The developed multifunctional phased array is an attractive and feasible frontend for K-/Ka- band SatCom system.

中文翻译：

---

K/Ka波段卫星通信应用中多通道、高效率的高集成发射和接收相控阵

提出了一种高度集成的 K/Ka 波段相控阵，其具有用于发射的双工通道和用于接收的双圆极化通道。为了提高效率和通道隔离度，提出了一种新颖的架构，将喇叭天线、偏振器、正交模式换能器 (OMT) 和滤波器集成在一个非常紧凑的辐射孔径内作为元件。基于该元件，开发、制造和测量了一个具有 416 个元件的大型相控阵。实验结果表明，所提出的相控阵在发射和接收通道中均具有大于 56% 的高孔径效率，不同频率通道之间的通道隔离度高达 50 dB，不同极化通道之间的通道隔离度高达 20 dB。此外，在 20 和 30 GHz 下实现了 ±20° 和 ±18° 范围内的波束扫描性能，分别。开发的多功能相控阵是 K-/Ka-band SatCom 系统的一个有吸引力且可行的前端。