Title :
A Superconducting Microstrip Ultra-Wideband (UWB) Bandpass Filter at VHF-Band
Author :
Chen, Wei ; Guo, Xubo ; Cao, Bisong ; Zhang, Xiaoping ; Wei, Bin ; Zhang, Ying ; Lu, Xinxiang
Author_Institution :
Dept. of Phys., Tsinghua Univ., Beijing, China
Abstract :
A compact superconducting ultra-wideband filter with a passband from 125 to 260 MHz is demonstrated. The filter consists of ten shunt short-circuited stubs separated by connecting lines. The short-circuited stubs are grounded via a grounding strip that is attached to the box wall by a number of SiAl bonding wires. The filter is realized on two 2 in YBCO/LaAlO3 substrates, which are connected by two bonding wires. The measured results demonstrate an insertion loss of less than 0.08 dB and a return loss of better than 21 dB without tuning. Furthermore, the experimental results of the filter are in good agreement with the simulated ones.
Keywords :
VHF filters; band-pass filters; microstrip filters; superconducting filters; ultra wideband technology; VHF filters; frequency 125 MHz to 260 MHz; grounding strip; short-circuited stubs; superconducting microstrip bandpass filter; ultra wideband filters; Bandpass filter (BPF); microstrip; short-circuited stubs; superconducting; ultra-wideband (UWB);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2009.2029740
