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A simple circular-polarized antenna: circular waveguide horn coated with lossy magnetic material

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3 Author(s)
Lee, C.S. ; Hughes Aircraft Co., Los Angeles, CA, USA ; Shung-Wu Lee ; Justice, D.W.

It is shown that a circular waveguide horn coated with a lossy material in its interior wall can be used as an alternative to a corrugated waveguide for radiating a circularly polarized (CP) field. To achieve good CP radiation, the diameter of the structure must be larger than the free-space wavelength, and the coating material must be sufficiently lossy and magnetic. The device is cheaper and lighter in weight than the corrugated one

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Antennas and Propagation, IEEE Transactions on  (Volume:36 ,  Issue: 2 )