Miniaturized microstrip multipole low-pass filters using high-temperature superconducting YBa2Cu3O7-x thin films

Jeha Kim; Kwang-Yong Kang; Seok Kil Han; Sang Yeol Lee; Dal Ahn

doi:10.1117/12.218172

1 September 1995 Miniaturized microstrip multipole low-pass filters using high-temperature superconducting YBa₂Cu₃O_7-x thin films

Jeha Kim, Kwang-Yong Kang, Seok Kil Han, Sang Yeol Lee, Dal Ahn

Author Affiliations +

Proceedings Volume 2559, High-Temperature Microwave Superconductors and Applications; (1995) https://doi.org/10.1117/12.218172
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

We have designed the microstrip-type multipole (7-pole and 9-pole) lowpass filters consisting of both transmission lines and open stubs. The filters were fabricated on high temperature superconducting (HTS) YBa₂Cu₃O_7-(delta ) (YBCO) thin films grown on MgO(100) substrates by pulsed laser deposition. For 7-pole lowpass filter, the measured insertion losses were within 0.5 dB, and up to 8 GHz the passband shows very flat with ripples of less than 0.05 dB. For 9-pole filter, we observed the insertion loss of 5.0 dB and the ripples of 0.64 dB. The skirt became steep and the off-band rejection increased large as the number of poles increases.

Citation Download Citation

Jeha Kim, Kwang-Yong Kang, Seok Kil Han, Sang Yeol Lee, and Dal Ahn "Miniaturized microstrip multipole low-pass filters using high-temperature superconducting YBa₂Cu₃O_7-x thin films", Proc. SPIE 2559, High-Temperature Microwave Superconductors and Applications, (1 September 1995); https://doi.org/10.1117/12.218172

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