Rotation of plane of polarisation of a beam of microwaves by corrugated reflection surfaces
Abstract
Possibilities for the use of a corrugated reflection surface as a twist reflector in the microwave range are investigated. Reflection measurements were made in a microwave anechoic chamber for a plane-polarized wave oriented with its plane of polarization at an angle of 45 deg with respect to the reflector grooves which was normally incident on an aluminum reflector with corrugation depth approximately a quarter wavelength and period less than half a wavelength. At this orientation, the reflected wave is plane polarized in a plane perpendicular to the plane of the incident wave, having undergone a tilt of the plane of polarization through 90 deg. As the angle of incidence is increased, the angle of orientation of the electric field vector with respect to the corrugations which is required to produce a 90 deg twist is observed to increase, along with the suppression ratio. It has also been observed that the tilt of the plane of polarization caused by two surfaces in succession is additive.
- Publication:
-
Electronics Letters
- Pub Date:
- April 1982
- DOI:
- 10.1049/el:19820230
- Bibcode:
- 1982ElL....18..338P
- Keywords:
-
- Beams (Radiation);
- Corrugating;
- Microwave Transmission;
- Polarization Characteristics;
- Surface Reactions;
- Wave Reflection;
- Aluminum;
- Incident Radiation;
- Reflected Waves;
- Rotating Bodies;
- Surface Geometry;
- Electronics and Electrical Engineering