A 22-to-25GHz CMOS Non-Magnetic Balanced Circulator Achieving at Least 20dB TX-RX Isolation for an Antenna VSWR of 2

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A 22-to-25GHz CMOS Non-Magnetic Balanced Circulator Achieving at Least 20dB TX-RX Isolation for an Antenna VSWR of 2

Conference Paper (2026)

Author(s)

Heqi Deng (TU Delft - QCD/Babaie Lab)

Ehsan Shokrolahzade (TU Delft - Electrical Engineering, Mathematics and Computer Science)

Niels Fakkel (TU Delft - QCD/Babaie Lab)

Marco Spirito (TU Delft - Electrical Engineering, Mathematics and Computer Science)

Fabio Sebastiano (TU Delft - Electrical Engineering, Mathematics and Computer Science, TU Delft - QCD/Sebastiano Lab)

Masoud Babaie (TU Delft - QCD/Babaie Lab, TU Delft - Electrical Engineering, Mathematics and Computer Science)

Research Group

QCD/Babaie Lab

DOI related publication

https://doi.org/10.1109/ISSCC49663.2026.11408990 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:b3683afc-fc76-4e92-94b6-e57fe098dd7e

More Info

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Publication Year

2026

Language

English

Research Group

QCD/Babaie Lab

Pages (from-to)

562-564

Publisher

IEEE

ISBN (electronic)

9798331589363

Event

2026 IEEE International Solid-State Circuits Conference, ISSCC 2026 (2026-02-15 - 2026-02-19), San Francisco, United States

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Abstract

This paper presents a mm-wave non-magnetic balanced circulator that bridges the gap between the high insertion loss (IL) of electrical balance duplexers and the transmitter (TX)to-receiver (RX) isolation degradation of conventional circulators under varying antenna (ANT) voltage standing wave ratio (VSWR). Using quadrature couplers, a balance network, and (non)-reciprocal branches, it achieves <5.2dB TX-to-ANT IL, <4.2dB RX-to-ANT IL, and >20dB TX-to-RX isolation over a >2.2GHz bandwidth at VSWR=2.