Title :
Narrow passband high-temperature superconducting filters of highly compact sizes for personal communication service applications
Author :
Kwak, June Sik ; Lee, Jong Hyun ; Hong, Jin Pyo ; Han, Seok Kil ; Kim, Wan Sun ; Char, Kook Rin
Author_Institution :
Dept. of Phys., Hanyang Univ., Seoul, South Korea
fDate :
3/1/2003 12:00:00 AM
Abstract :
A novel highly compact high-temperature superconducting filter based on spiral lumped elements was demonstrated for personal communication system applications. The filter consists of eight-pole microstrip resonators enclosed in a substrate 0.5 × 5 × 32 mm. The filter was designed to have a bandwidth of 17 MHz and a center frequency of 1760 MHz. A low insertion loss of 0.4 dB in the passband with an out-of-band rejection loss of about -70 dB was observed at 65 K. Measured characteristics of the filter showed good agreement with simulated responses.
Keywords :
band-pass filters; high-temperature superconductors; microstrip filters; microstrip resonators; mobile radio; resonator filters; superconducting filters; superconducting microwave devices; superconducting resonators; -70 dB; 0.4 dB; 17 MHz; 1760 MHz; 65 K; compact size; insertion loss; microstrip resonator; narrow passband high temperature superconducting filter; out-of-band rejection loss; personal communication service; spiral lumped element; Band pass filters; Bandwidth; Frequency; Microstrip filters; Microstrip resonators; Passband; Personal communication networks; Resonator filters; Spirals; Superconducting filters;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.811032
