TY - JOUR
T1 - Design and performance of a compact forward-coupled HTS microstrip filter for a GSM system
AU - Zhang, Guoyong
AU - Zhu, MH
AU - Cao, BS
AU - He, WJ
AU - Guo, XB
AU - He, S
AU - Liu, Bin
AU - Wang, Yi
AU - Zhao, YG
AU - Liu, ML
AU - Han, ZH
AU - Gao, BX
PY - 2002/12/1
Y1 - 2002/12/1
N2 - A practical design technique for a compact forward-coupled microstrip bandpass filter structure is introduced based on a computer-aided simulation and optimization software TUMIC. The structure consists of a parallel array of fully aligned half-wavelength resonators. Aimed at the application in the front-end receiver of a GSM base station, a 9-pole high-temperature superconductor filter with 2.6% fractional bandwidth at 1732.5 MHz was designed and fabricated using double-sided YBCO thin films on a 30-mm x 30-mm X 0.5-mm LaAlO3 wafer. The S-parameter measurements show a good agreement with the simulated results. At 30 K, the filter has less than 0.4-dB insertion loss, 0.3-dB passband ripple, and better than 12-dB return loss.
AB - A practical design technique for a compact forward-coupled microstrip bandpass filter structure is introduced based on a computer-aided simulation and optimization software TUMIC. The structure consists of a parallel array of fully aligned half-wavelength resonators. Aimed at the application in the front-end receiver of a GSM base station, a 9-pole high-temperature superconductor filter with 2.6% fractional bandwidth at 1732.5 MHz was designed and fabricated using double-sided YBCO thin films on a 30-mm x 30-mm X 0.5-mm LaAlO3 wafer. The S-parameter measurements show a good agreement with the simulated results. At 30 K, the filter has less than 0.4-dB insertion loss, 0.3-dB passband ripple, and better than 12-dB return loss.
KW - microstrip bandpass filter
KW - high-temperature superconductor (HTS)
KW - wireless communications
UR - https://www.scopus.com/pages/publications/0036945824
U2 - 10.1109/TASC.2002.806311
DO - 10.1109/TASC.2002.806311
M3 - Article
VL - 12
SP - 1897
EP - 1901
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 4
ER -