Fast and Efficient Approach for Computing the Nonlinearity in the Ring-Resonator-Based HTS Reaction-Type Filters

Abolfazl Mostaani | Seyed Mohammad Hassan Javadzadeh

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=137117
Date :  2019/11/29
Publish in :    IEEE Transactions on Applied Superconductivity
DOI :  https://doi.org/10.1109/TASC.2019.2948991
Link :  http://dx.doi.org/10.1109/TASC.2019.2948991
Keywords :Non-linearity, intermodulation distortion, superconducting ring resonator, reaction type filter.

Abstract :

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-In this paper, a fast and accurate method for computing the non-linearities such as Third-order Harmonic (H3) generation and Third-order Intermodulation Distortion (IMD3) in complex superconducting structures based on the Ring Resonators is proposed. First of all, a recap of the non-linearity in the superconductors and its physical concept are mentioned. Then, the non-linear circuit model of Superconducting Ring Resonators (SRRs) is reviewed and developed to be applicable to complex structures such as multi-pole SRR based reaction type Chebyshev filters. In the third section, it is shown that the combination of the Harmonic Balance (HB) method with the non-linear circuit model computes the non-linearity quickly and accurately. The method is applied to several SRR based structure and the computed non-linearity is compared with the measurements in order to prove the claim.