HBT Power Detector utilizing an Ultra-compact Transformer-based Coupler for 5G BIST

Abstract

This paper presents the design of a fully integrated power detector circuit in IHP SG 13S technology composed of a 15 dB coupling transformer-based coupler and a read-out circuit designed for built-in self-test (BIST). A dynamic range of 23 dB is achieved on an extremely compact footprint of 350 µm x 400 µm and low power consumption of 2 mW. To the best of the authors' knowledge, this is the power detector with the smallest on-chip footprint at 5th generation (5G) mobile communications frequencies.