Open AccessDual‐band bandpass Wilkinson power divider of controllable bandwidths
Author(s) -
Pang YiHsin,
Li ZhongHe
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.3645
Subject(s) - wilkinson power divider , passband , band pass filter , chebyshev filter , return loss , bandwidth (computing) , resonator , multi band device , power dividers and directional couplers , insertion loss , impedance matching , electrical engineering , electronic engineering , electrical impedance , frequency divider , engineering , telecommunications , antenna (radio)
In this reported work, quarter‐wavelength stepped‐impedance resonators with K inverters have been employed to realise a dual‐band bandpass Wilkinson power divider (WPD). The individual bandwidth of each passband can be controlled with the dualband resonators and K inverters. A systematic design approach of the power divider is provided with the aid of the even–odd mode analysis and verified by circuit simulation. A 2.45/5.8 GHz WPD with a Chebyshev response has also been implemented for validation. The measured fractional bandwidth of 20 dB return loss (1/| S 11 |) is 7.0%/4.1% which is consistent with the theoretical design. In addition to the 3 dB power division, an insertion loss of 0.8/1.2 dB is obtained. Isolation of 20.1/19 dB at the centre frequency is also achieved. Full‐wave simulated data are also presented and show good agreement with measured results. Compared with other dual‐band bandpass power dividers, the proposed circuit exhibits better impedance matching and bandwidth.