Work

A Closed-Loop Impedance Tuner With Integrated Reflectometer and High-Voltage Tuning Switches

Year: 2025

Type: article

Abstract: In this work, a closed-loop radio frequency (RF) frontend impedance tuning system with high-voltage impedance tuning switches monolithically integrated with an RF reflectometer is presented. An RF application-specific integrated circuit (ASIC) integrating a low-power scalar RF reflectometer and two RF tuning switches is designed and manufactured in${90}{\,}\text{nm}$RF SOI CMOS switch technology. A hardware prototype closed-loop tuning system is built with the designed ASIC along with a commercial impedance tuning IC, aiming for tuning at operating frequencies between 690 and${900}{\,}\text {MHz}$. The circuit can process signals with power greater than${18}{\,}\text {dBm}$, while the RF voltage handling capability reaches${63}{\,}\text {V}$with the linearity of$\text {IIP}_{{3}}={84}{\,}\text {dBm}$in the signal path. The designed ASIC consumes${46}{\,}{{\mu }\text {W}}$and${184}{\,}{{\mu }\text {W}}$in idle and conversion mode, respectively.

Source: IEEE Microwave and Wireless Technology Letters

DOI: 10.1109/lmwt.2025.3630277

Authors: Ting-Li Hsu, Amelie Hagelauer, Valentyn Solomko

Institutions: Technical University of Munich, Infineon Technologies (Germany)

Language: English

Topic: Radio Frequency Integrated Circuit Design

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $2,645