Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 67, Issue 7, Pages 3053-3063Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2019.2901678
Keywords
Ka-band; Miller effect; phase modulation; phase shifter; phased array; true-time delay; 28 GHz; wideband
Categories
Ask authors/readers for more resources
A new true-time delay phase shifter concept is proposed exploiting the distributed Miller effect in coupled transmission lines. Simultaneous change in Miller capacitance and inductance controlled by a single analog voltage changes the propagation delay of a transmission line with constant input impedance and insertion loss. The true-time delay line feature of the proposed architecture accommodates a wide bandwidth signal without group delay distortion. A theoretical framework for understanding Miller inductance from voltage and current duality and the distributed Miller effect using coupled wave equations is presented. As a proof of concept, a four-stage tunable delay line with a high-speed phase modulation capability was fabricated in a 45-nm RF SOI CMOS process and occupies an active area of 0.28 mm(2). The measured IC demonstrates a broadband tunable true-time delay with a measured group delay tuning range of 18 +/- 1 ps from 11 to 24 GHz. The measured phase shift ranges are 173 degrees and 182 degrees with insertion losses of 10.6 +/- 0.7 dB and 11.6 +/- 1 dB at 28 and 30 GHz, respectively. The measured dc power consumption is 22 mW from a 1.2-V supply.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available