Waveguide to microstripline polarization converter having a coup

Details Waveguide to microstripline polarization converter having a coup Waveguide to microstripline polarization converter having a coup

1989-06-21

1991-08-27

LaRoche, Eugene R.

Wave transmission lines and networks

Wave mode converters

333 26, 343756, 343786, H01P 117, H01P 5107

Patent

active

050436830

ABSTRACT:
A capacitively coupled printed patch (3) as a high efficiency device to couple orthogonally polarized energy between a microstripline (5) and a waveguide (1). Coupling between the microstripline (5) and the patch (3) is achieved by the microstripline terminating in a narrow strip probe (4), the end of which lies close to, but not in contact with, an edge of the patch (3). Two separate probes (4) arranged mutually orthogonally are used to effect independent polarized couplings to produce independent linear orthogonal signals or independent left- and right-handed circularly polarized signals. The microstriplines (5) and patch (3) are supported on a common substrate (8) which extends transversely through the waveguide (1). The waveguide wall has a quarter-wavelength thickness (T) so that its inner edge (10) appears continuous to energy passing through the substrate (8). One application is in a satellite TV receiving system where it is required to isolate two signals sharing a common channel but having orthogonal polarizations.

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Carven, K. and Mink, J.; "Microstrip Antenna Technology"; IEEE Trans on Antennas and Propagation; vol. AP-29, No. 1; Jan. 1981; pp. 16, 17.

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