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- Title
VHF/UHF broadband four-way power combiner/divider using 0° hybrid and impedance transformer based on transmission lines.
- Authors
Hwiseob Lee; Wonseob Lim; Jongseok Bae; Wooseok Lee; Hyunuk Kang; Kang-Yoon Lee; Keum Cheol Hwang; Youngoo Yang
- Abstract
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 × 163 mm2. Based on the measured S-parameters, an ultrabroad 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.
- Subjects
VHF antennas; UHF antennas; POWER combiners (Electronics); HYBRID systems; IMPEDANCE spectroscopy; ELECTRIC transformers; ELECTRIC lines
- Publication
IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2017, Vol 11, Issue 12, p1748
- ISSN
1751-8725
- Publication type
Article
- DOI
10.1049/iet-map.2016.1112