TY - JOUR
T1 - Narrow-band filter for the frequency range of 1.9 GHz using double-sided YBCO films on 10-mm-square and 20-mm-square LaAlO3 substrates
AU - Wang, L. M.
AU - Horng, Mao Yuan
AU - Liu, Chen Chung
AU - Tsao, Jyh Haur
AU - Sung, H. H.
AU - Yang, H. C.
AU - Horng, H. E.
N1 - Funding Information:
Manuscript received August 4, 2002. This work was supported by the National Science Council of the republic of China and the Da-Yeh University for under Grants NSC 90-2112-M-212-001 and DEE-9121. L. M. Wang, M.-Y. Horng, C.-C. Liu, J.-H. Tsao, and H. H. Sung are with Department of Electrical Engineering, Ta-Yeh University, Chang-Hwa 515, Taiwan, R.O.C. (e-mail: [email protected]). H. C. Yang is with Department of Physics, National Taiwan University, Taipei, Taiwan, R.O.C. H. E. Horng is with Department of Physics, National Taiwan Normal University, Taipei, Taiwan, R.O.C. Digital Object Identifier 10.1109/TASC.2003.813707
PY - 2003/6
Y1 - 2003/6
N2 - Narrow-band microstrip hairpin-type filters are designed for wireless-communication applications. We have fabricated the high-Tc superconducting filters by pattering YBa2Cu3Oy (YBCO) films deposited on 10-mm-square and 20-mm-squáre, 0.6-mm-thick LaAlO3 substrates. The form of hairpin-resonator band-pass filter can be thought of as an alternative version of parallel-couple-resonator filter, except that the open-circuited ends of the resonator are folded back. Our 3-pole 10-mm-square filter has a 2.5-dB maximum insertion loss and 16 MHz bandwidth at 1.94 GHz, while 3-pole 20-mm-square filter has a 0.45-dB maximum insertion loss and 30 MHz bandwidth at 1.94 GHz both with the air-gap height of 3 mm. By mechanically changing the height of air gap between the filter pattern and the top housing plane, the center of frequency of the filter was varied from 1.92 to 2.0 GHz, corresponding to a frequency shift of about 5%. The influences of wafer sizes and housing height on filter performance are discussed.
AB - Narrow-band microstrip hairpin-type filters are designed for wireless-communication applications. We have fabricated the high-Tc superconducting filters by pattering YBa2Cu3Oy (YBCO) films deposited on 10-mm-square and 20-mm-squáre, 0.6-mm-thick LaAlO3 substrates. The form of hairpin-resonator band-pass filter can be thought of as an alternative version of parallel-couple-resonator filter, except that the open-circuited ends of the resonator are folded back. Our 3-pole 10-mm-square filter has a 2.5-dB maximum insertion loss and 16 MHz bandwidth at 1.94 GHz, while 3-pole 20-mm-square filter has a 0.45-dB maximum insertion loss and 30 MHz bandwidth at 1.94 GHz both with the air-gap height of 3 mm. By mechanically changing the height of air gap between the filter pattern and the top housing plane, the center of frequency of the filter was varied from 1.92 to 2.0 GHz, corresponding to a frequency shift of about 5%. The influences of wafer sizes and housing height on filter performance are discussed.
KW - High-T superconducting filters
KW - Microstrip hairpin-type filters
KW - Resonators
KW - YBCO films
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U2 - 10.1109/TASC.2003.813707
DO - 10.1109/TASC.2003.813707
M3 - Conference article
AN - SCOPUS:0041440210
SN - 1051-8223
VL - 13
SP - 272
EP - 275
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2 I
T2 - 2002 Applied Superconductivity Conference
Y2 - 4 August 2002 through 9 August 2002
ER -