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Directivity compensation of crossed waveguide directional coupler  

Kim, Dong-Hyun (Department of Telecommunication Engineering, Cheju National University)
Yang, Doo-Yeong (Research Institute of Advanced Technology, Cheju National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.44, no.9, 2007 , pp. 63-69 More about this Journal
Abstract
The directivity of crossed waveguide directional coupler is generally decreased according as coupling coefficient of it increase. In this paper, the geomertical parameters of crossed slot pair for directivity improvement is modified and the formulas for design of it are proposed. The crossed waveguide directional coupler designed upon the formulas is fabricated with the WR42 waveguide in K-band. The measured results show that the coupling coefficient is 21.5 dB and directivity is minimum 23.9 dB over the operating frequency from 18GHz to 26.5GHz.
Keywords
Directivity; coupling coefficient; crossed waveguide directional coupler; WR42 waveguide; K-band;
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