Open AccessTri‐band superconducting bandpass filter with high selectivity
Author(s) -
Heng Yong,
Guo Xubo,
Cao Bisong,
Wei Bin,
Zhang Xiaoping,
Chen Wei,
Ying Zhijun,
Song Xiaoke
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.0648
Subject(s) - band pass filter , fabrication , filter (signal processing) , materials science , m derived filter , optoelectronics , prototype filter , impedance matching , electrical impedance , selectivity , electronic engineering , superconductivity , constant k filter , filter design , physics , electrical engineering , engineering , chemistry , condensed matter physics , biochemistry , catalysis , medicine , alternative medicine , pathology
A tri‐band superconducting filter at L‐band comprising three high‐pole single‐band sub‐filters with sharp band‐edges is presented to meet the high selectivity requirement. Matching junctions with high‐impedance branch lines are used to connect the sub‐filters and to reduce the channel interactions. MgO and LaAlO 3 substrates are utilised in the design and fabrication procedure to reduce the filter size and achieve a high performance. The whole filter has a compact size of 43 × 39.1 mm, and the measured results match well with the simulations.