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T unable dual‐band filtering power divider with constant bandwidth and high selectivity
Author(s) -
Wu Bian,
Xu Yang,
Wu Yufeng,
Zhang Xiuyin
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30828
Subject(s) - bandwidth (computing) , wideband , multi band device , power dividers and directional couplers , return loss , band pass filter , electrical engineering , optoelectronics , materials science , physics , optics , telecommunications , engineering , antenna (radio)
A tunable dual‐band filtering power divider with constant bandwidth and high selectivity is proposed, which incorporates a wideband power divider with two tunable dual‐band filters. The filter provides a tunable dual‐mode dual‐band filtering response, and realizes a 90° phase shift to replace the middle quarter wavelength transmission line. As the bias voltage increases, the lower band increases from 1.1 to 1.5 GHz with a constant bandwidth of 40 MHz, while the higher band remains at 2.17 GHz with a fixed bandwidth of 60 MHz. During the wide tuning range, the return loss and isolation are always >15 dB, with a high selectivity due to multiple transmission zeros.