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Updated: Apr 15, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Reliable and integrated technique for determining resonant frequency in radio frequency resonators. Application to a
Rigoberto Jauregui1, Estibaliz Asua1, Joaquin Portilla1
1Department of Electricity and Electronics, University of the Basque Country (UPV/EHU), Leioa 48940, Spain.
Abstract:
This paper presents a reliable and integrated technique for determining the resonant frequency of radio frequency resonators, which can be of interest for different purposes. The approach uses a heterodyne scheme as phase detector coupled to a voltage-controlled oscillator. The system seeks the oscillator frequency that produces a phase null in the resonator, which corresponds to the resonant frequency. A complete explanation of the technique to determine the resonant frequency is presented and experimentally tested. The method has been applied to a high-precision displacement sensor based on resonant cavity, obtaining a theoretical nanometric precision.
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