Design of a Miniaturized Superconducting Bandpass Filter by Evaluating the Kinetic Inductance in the K-Inverter

Haruichi KANAYA
Koji KAWAKAMI
Keiji YOSHIDA

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C    No.2    pp.145-150
Publication Date: 2006/02/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.2.145
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Superconducting High-frequency Devices)
Category: 
Keyword: 
HTS passive device,  bandpass filter,  quarter-wavelength resonator,  meander line,  coplanar waveguide,  

Full Text: PDF(980KB)>>
Buy this Article


Summary: 
We propose a design theory of the miniaturized high temperature superconducting (HTS) coplanar waveguide (CPW) bandpass filter (BPF), which is composed of meanderline quarter-wavelength resonator, J- and K-inverters. The J- and K-inverters are realized by using interdigital gap and meander-shape inductor. To evaluate the kinetic inductance of the K-inverter, we fabricate the YBCO resonator connected with K-inverters and redesigned the YBCO filter parameters. Finally, we designed and fabricated the YBCO CPW quarter-wavelength resonator BPF by taking account of the kinetic inductance of the K-inverter. The experimental results are in agreement with the design parameters.