Title :
An HTS narrow bandwidth coplanar shunt inductively coupled microwave bandpass filter on LaAlO3
Author :
Vogt, Andreas ; Jutzi, Wilhelm
Author_Institution :
Karlsruhe Univ., Germany
fDate :
4/1/1997 12:00:00 AM
Abstract :
Coplanar waveguide bandpass filters with shunt inductively coupled resonators using high-temperature superconductors (HTS´s) on LaAlO3 substrates were developed for high packing density, narrow bandwidth, and low power applications. The computer-aided design and measurements on resonators to test weak end-coupling are described in this paper. A coplanar three-pole Chebychev bandpass filter with 1.8% 3-dB bandwidth at 10 GHz and 1.3-dB insertion loss at 77 K was fabricated and measured. The maximum superconducting current density of the filter is evaluated
Keywords :
Chebyshev filters; band-pass filters; barium compounds; circuit CAD; coplanar waveguides; coupled circuits; high-temperature superconductors; lanthanum compounds; microwave filters; resonator filters; superconducting microwave devices; superconducting resonators; yttrium compounds; 1.3 dB; 10 GHz; 77 K; Chebychev bandpass filter; LaAlO3; YBaCuO-LaAlO3; bandwidth; computer-aided design; coplanar shunt; coplanar waveguide; high-temperature superconductors; inductively coupled filters; inductively coupled resonators; insertion loss; microwave bandpass filter; packing density; superconducting current density; weak end-coupling; Application software; Band pass filters; Bandwidth; Coplanar waveguides; Design automation; High temperature superconductors; Insertion loss; Loss measurement; Superconducting filters; Testing;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
