A broadband directional coupler based on ferrite cores

A broadband directional coupler based on ferrite cores is proposed for high frequency (HF)/Very high frequency (VHF)/Ultra High Frequency (UHF) communication systems. The transformer‐type coupler is composed of two double‐aperture ferrite cores and 1‐mm‐diameter strands. The ferrite cores with diffe...

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Bibliographic Details
Published inElectronics letters Vol. 57; no. 6; pp. 267 - 269
Main Authors Liu, Lei, Song, Nan, Wang, Zheng‐Bin
Format Journal Article
LanguageEnglish
Published Stevenage John Wiley & Sons, Inc 01.03.2021
Wiley
Subjects
Bandwidths
Broadband
Circuits
Communications systems
Directional couplers
Ferrites
Insertion loss
Ratios
Ultrahigh frequencies
Very high frequencies
Voltage standing wave ratios
Waveguide and microwave transmission line components
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Summary:A broadband directional coupler based on ferrite cores is proposed for high frequency (HF)/Very high frequency (VHF)/Ultra High Frequency (UHF) communication systems. The transformer‐type coupler is composed of two double‐aperture ferrite cores and 1‐mm‐diameter strands. The ferrite cores with different relative permeabilities are screened to achieve an ultra‐wide bandwidth (5 –1000 MHz). The coupler demonstrates excellent electric performances. The voltage standing wave ratio of each port is less than 1.2, a stable −20 dB coupling level is maintained over the operating bandwidth and the insertion loss is less than 0.8 dB. Such couplers have compact sizes and are of very low cost.
ISSN:0013-5194
1350-911X
DOI:10.1049/ell2.12117