Compact inductor-capacitor resonators at sub-gigahertz frequencies

Qi-Ming Chen, Priyank Singh, Rostislav Duda, Giacomo Catto, Aarne Keränen, Arman Alizadeh, Timm Mörstedt, Aashish Sah, Andras Gunyho, Wei Liu, Mikko Möttönen

Research output: Contribution to journalArticleScientificpeer-review

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Compact inductor-capacitor (LC) resonators, in contrast to coplanar waveguide (CPW) resonators, have a simple lumped-element circuit representation but usually call for sophisticated finite-element method (FEM) simulations for an accurate modeling. Here we present a simple analytical model for a family of coplanar LC resonators where the electrical properties are directly obtained from the circuit geometry with a satisfying accuracy. Our experimental results on ten high-internal-quality-factor resonators (Qi≳2×105), with frequencies ranging from 300MHz to 1GHz, show an excellent consistency with both the derived analytical model and detailed FEM simulations. These results showcase the ability to design sub-gigahertz resonators with less than 2% deviation in the resonance frequency, which has immediate applications, for example, in the implementation of ultrasensitive cryogenic detectors. The achieved compact resonator size of the order of a square millimeter indicates a feasible way to integrate hundreds of microwave resonators on a single chip for realizing photonic lattices.
Original languageEnglish
Article number043126
Issue number4
Publication statusPublished - 7 Nov 2023
MoE publication typeA1 Journal article-refereed


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