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A Scalable 32-38-GHz Transmitter and Receiver Phased Array With High Radiation Efficiency in UV-LIGA-Based Ceramic Packaging

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 ceram...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2024-08, Vol.72 (8), p.4975-4985
Main Authors: Song, Ai Hu, Wang, Lei, Cheng, Yu Jian
Format: Article
Language:English
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Summary: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 0.5\lambda _{0} 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\times8 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.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2024.3357974