论文名称“A Scalable 32–38-GHz Transmitter and Receiver Phased Array With High Radiation Efficiency in UV-LIGA-Based Ceramic Packaging”。由于Ka波段属于毫米波位于大气窗口内，较微波频段具备更宽的绝对带宽，广泛用于无线通信和雷达系统。本文介绍了一种具备高辐射效率和可扩展性 32-38 GHz 天线封装（AiP）相控阵，集成了发射（Tx）和接收（Rx）功能，利用单元 AiP 模块和四通道波束形成集成电路（BFIC）。Al₂O₃ 陶瓷封装确保了可靠性、气密性和有效的散热能力。采用紫外光光刻、电镀和成型（UV-LIGA）工艺加工全金属天线，采用充气同轴互连以减少损耗。加工了一个 8 × 8 的原理样机，实测的 EIRP 和 G/T 值分别为67.2 dBm 和−4.1 dB/K°，在 E/H 面扫描范围超过 ± 50°，总辐射效率（TRE）超过80%。工作主要完成人：宋艾虎，王磊，程钰间。

论文链接：https://ieeexplore.ieee.org/document/10422737

Abstract-This article introduces a scalable 32-38-GHz antenna-in-packaging (AiP) phased array design with high radiation efficiency. It integrates transmit (Tx) and receive (Rx) functions via RF switches, utilizing four-antenna AiP modules and a four-channel beamforming integrated circuit (BFIC). Al₂O₃ ceramic packaging ensures reliability, gas tightness, and effective heat dissipation. Ultraviolet lithographie, galvanoformung and abformung (UV-LIGA) technology constructs full-metal antennas with air-filled coaxial interconnections to reduce loss. The meandering technique maintains a 0.5λ₀ element spacing. A decoupling structure prevents parasitic modes at 35.9 GHz and gold bands mitigate resonance at 34.4 GHz owing to the limitation of the ceramic packaging technology during phased array scans. An 8×8 demonstrator achieves an EIRP of 67.2 dBm and G/T of −4.1 dB/K at 35 GHz. The phased array scans ±50° in E- and H-planes, with a new metric, total radiation efficiency (TRE), measuring over 80% at 35 GHz and over 73% at 32-38 GHz. This design holds promise for Ka-band wireless communication and radar systems.

Index Terms—Gas-filled coaxial structure, all-metal AiP phased array, total radiation efficiency, UV-LIGA process