| Title |
Fabrication & Characteristics of SIR Microsrip Bandpass Filters using Deposition of High-Tc Superconducting Epitaxial Films |
| Authors |
박경국(Park, Kyung-Kuk) ; 정동철(Chung, Dong-Chul) ; 정용채(Jeong, Yong-Chae) ; 임성훈(Lim, Sung-Hun) ; 임성우(Yim, Seong-Woo) ; 한병성(Han, Byoung-Sung) |
| Keywords |
HTS microstrip bandpass filter ; Stepped Impedance Resonator(SIR) ; Epitaxial films ; Impedance ratio(K) ; pulse Laser Deposition(PLD) system. |
| Abstract |
In this paper, we designed and fabricated High-Tc Superconducting (HTS) microstrip bandpass filters using Stepped Impedance Resonators(SIR) and studied on their characteristics. The high-T_c superconducting Y_1Ba_2Cu_3O_{7-x} epitaxial films were deposited by Pulse Laser Deposition (PLD) system on MgO. The fabricated filters were designed so as to operate in Ku band with central frequency 17.25 GHz, bandwidth 2.896% and ripple 0.01 dB. These filters were composed of parallel coupled microstrip SIR of which impedance ratio (K) are 0.5, 1.5. In the measured response, HTS filters had showed insertion loss below -0.5 dB. For comparison with normal conducting filter, we fabricated the Au counterpart that consists of the resonators as K=1.5 in the same dimension and measured performance of the Au filter. In comparison, HTS filter designed optimally got superior response to gold conterpart. |