Open AccessVHF/UHF broadband four‐way power combiner/divider using 0° hybrid and impedance transformer based on transmission lines
Author(s) -
Lee Hwiseob,
Lim Wonseob,
Bae Jongseok,
Lee Wooseok,
Kang Hyunuk,
Lee KangYoon,
Hwang Keum Cheol,
Yang Youngoo
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.1112
Subject(s) - power dividers and directional couplers , ultra high frequency , wilkinson power divider , broadband , electrical engineering , electrical impedance , transformer , quarter wave impedance transformer , impedance matching , electric power transmission , characteristic impedance , engineering , high impedance , hybrid coupler , electronic engineering , frequency divider , telecommunications , damping factor , voltage
This study presents a broadband four‐way power combiner/divider for very high frequency (VHF) to ultra‐high frequency (UHF) bands using 0 ∘ hybrids and impedance transformers based on transmission lines. The 0 ∘ hybrids were used as in‐phase power combiners or dividers, and 1 : 4 impedance transformers were adopted to transform the impedance so that all input and output ports had a 50 Ω impedance. Each component was analysed using equivalent circuits. The overall size of the implemented four‐way power combiner/divider module was 110 × 163mm 2 . Based on the measured S ‐parameters, an ultra‐broad bandwidth from 8.0 to 600 MHz was achieved with an insertion loss <1.0 dB, reflection coefficients below −10.0 dB, isolation among the ports less than −15.0 dB, and magnitude and phase imbalances less than ±0.1 dB and 0.5 ∘ , respectively.