Title :
Design and Performance of Transmit Filters Using HTS Bulk Resonators for IMT-Advanced Applications
Author :
Saito, A. ; Teshima, H. ; Obara, H. ; Ono, S. ; Kimura, M. ; Sekiya, N. ; Hirano, H. ; Hirano, S. ; Ohshima, S.
Author_Institution :
Yamagata Univ., Yonezawa
fDate :
6/1/2007 12:00:00 AM
Abstract :
A transmit band pass filter using circular-disk high-temperature superconductor (HTS) bulk resonators was designed with a 5.0 GHz center frequency and a 100 MHz bandwidth for use in international mobile telecommunication (IMT) advanced applications. The frequency response and electromagnetic field were calculated using a three-dimensional simulator. The mode of the resonator was used because it had the smallest diameter. Using stripline (SL) resonators enhanced both the unloaded quality factor and the coupling between the input/output ports and resonators. The frequency response of the designed SL 3-pole Chebyshev filter meets the requirements of IMT-Advanced applications. Additionally, the maximum surface current of the HTS bulk filter was approximately 86% less than that of a conventional hairpin filter.
Keywords :
Chebyshev filters; band-pass filters; circuit simulation; high-temperature superconductors; strip line resonators; superconducting resonators; 3D simulator; Chebyshev filter; HTS bulk resonators; circular-disk high-temperature superconductor bulk resonators; conventional hairpin filter; electromagnetic field; frequency 100 MHz; frequency 5.0 GHz; frequency response; input port; international mobile telecommunication advanced applications; output port; stripline resonators; transmit band pass filter; Band pass filters; Bandwidth; Chebyshev approximation; Electromagnetic fields; Frequency response; High temperature superconductors; Q factor; Resonator filters; Stripline; Superconducting filters; HTS bulk; maximum surface current; stripline resonator; transmit band pass filter;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.897314
