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Circular-electric-mode hybrid coupler

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2 Author(s)
Sangster, A.J. ; Heriot-Watt University, Department of Electrical and Electronic Engineering, Edinburgh, UK ; McIntosh, D.J.

The circular-electric-mode hybrid coupler permits electromagnetic energy to be transferred from a circular waveguide, which supports a TE01 mode, to a coaxial waveguide also supporting a TE01 mode, or vice versa. The extent to which this transference occurs is controlled by a cylindrical-waveguide `drift┬┐┬┐ region, which supports both a TE01 and a TE02 mode. The coupling mechanism is closely analogous to that which occurs in the more familiar rectangular-waveguide hybrid, or Riblet, coupler. The paper provides a theoretical description of such a coupler, the results of which are shown to be in agreement with measurement. The theory represents a new application of the moment method.

Published in:

Microwaves, Antennas and Propagation, IEE Proceedings H  (Volume:132 ,  Issue: 3 )