This article presents a 1024-element dual-polarized Ku-band (10.7–12.7 GHz) satellite communication (SATCOM) receive (RX) phased array. The array consists of four 16 $\times16$ subarray tiles, each of which comprises 64 eight-channel beamformer chips, 256 dual-channel low-noise amplifiers (LNAs), and 256 dual-polarized antennas built on an affordable printed circuit board (PCB). The antennas spaced at $\lambda $ /2 spacing at 12.2 GHz in an equilateral triangular grid allow scanning up to x±70° in all planes while maintaining a cross-polarization level $ < -30$ dB. The use of LNAs just after the antennas enables a low-noise operation with an antenna gain-to-noise temperature (G/T) of 10.5 dB/K ( $T_{\mathrm {ant}} =20$ K) at broadside while maintaining a directivity of 34 dB at 11.7 GHz. Also, a two-pole/two-zero filter is placed between the LNA and the beamformer chip to greatly attenuate any transmit leakage signal at 14–14.5 GHz. The lightweight, low-cost PCB with all silicon chips and a thickness of 3.4 mm presents a viable candidate for Ku-band SATCOM ground and Satcom-On-The-Move (SOTM) terminals.

中文翻译：

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具有 >10dB/KG/T 和嵌入式发射抑制滤波器的 1024 单元 Ku 波段 SATCOM 双极化接收器

本文介绍了一个 1024 个单元的双极化 Ku 波段 (10.7–12.7 GHz) 卫星通信 (SATCOM) 接收 (RX) 相控阵。该数组由四个 16 $\times16$ 子阵列瓦片，每个瓦片包括 64 个八通道波束形成器芯片、256 个双通道低噪声放大器 (LNA) 和 256 个双极化天线，它们构建在经济实惠的印刷电路板 (PCB) 上。天线间隔为 $\lambda $ 等边三角形网格中 12.2 GHz 时的 /2 间距允许在所有平面上进行高达 x±70° 的扫描，同时保持交叉极化水平 $ < -30$ D b。在天线之后使用 LNA 可实现低噪声操作，天线增益噪声温度 (G/T) 为 10.5 dB/K ( $T_{\mathrm {ant}} =20$ K) 在宽边，同时在 11.7 GHz 保持 34 dB 的方向性。此外，在 LNA 和波束形成器芯片之间放置了一个二极点/二零滤波器，以极大地衰减 14–14.5 GHz 的任何发射泄漏信号。带有全硅芯片且厚度为 3.4 毫米的轻质、低成本 PCB 是 Ku 波段卫星通信地面和卫星通信移动 (SOTM) 终端的可行候选者。