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Influence of dichroic plate thickness on polarisation of transmitted electromagnetic waves

Parker, Edward A., Cahill, R. (1981) Influence of dichroic plate thickness on polarisation of transmitted electromagnetic waves. IEE Proc Part H: Microwaves, Optics and Antennas, 128 (6). pp. 317-320. ISSN 0143-7097. (doi:10.1049/ip-h-1:19810055) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1049/ip-h-1:19810055

Abstract

A computer model, described in previous papers, is used to calculate the crosspolarised component of the field transmitted through waveguide dichroic plates, with thickness in the range 1.0 mm to 2.0 cm. A linearly polarised feed operating over the frequency range 19.0 to 26.0 GHz is placed 4.0 cm from the plate centre. The crosspolar levels vary more rapidly with frequency for the thicker plates and, on average, are marginally lower when the waveguides are arranged in an equilateral triangular lattice, rather than on a square lattice. With both lattices the levels fall below ¿30 dB in all planes over narrow ranges of frequency. The locations of these minima depend on the plate thickness and the lattice geometry, and are determined by the TE11 and TE*11 modes. They occur when both modes are in phase at the guide apertures on the output side of the plate.

Item Type: Article
DOI/Identification number: 10.1049/ip-h-1:19810055
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Depositing User: Ted Parker
Date Deposited: 14 Mar 2014 09:23 UTC
Last Modified: 29 May 2019 11:59 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/38762 (The current URI for this page, for reference purposes)
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