Off-Bragg Blazed Rectangular Groove Gratings for High Diffraction Efficiency Devices

Author

Chen, Weijie ; Beaulieu, Norman C. ; Michelson, David G. ; Jull, E.V.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada

Volume

61

Issue

4

fYear

2013

fDate

4/1/2013 12:00:00 AM

Firstpage

2342

Lastpage

2347

Abstract

Off-Bragg blazing of gratings for high efficiency frequency scanning antennas, multiplexers and demultiplexers, is described. Blaze angles occur in pairs and are related by a generalization of the Bragg condition applicable to all grating profiles. Off-Bragg blazing for TM polarization occurs for several perfectly conducting grating profiles, perhaps for all, as indicated by extensive numerical computations using a rigorous mode matching method on a perfectly conducting rectangular groove reflection grating. Design curves for groove dimensions which have high diffraction efficiencies and wide deviations with relatively shallow grooves are given.

Keywords

Bragg gratings; antennas; electromagnetic wave diffraction; electromagnetic wave polarisation; electromagnetic wave reflection; mode matching; multiplexing equipment; Blaze angles; TM polarization; demultiplexers; design curves; groove dimensions; high diffraction efficiency devices; high efficiency frequency scanning antennas; multiplexers; off-bragg blazed rectangular groove gratings; perfectly conducting grating profiles; perfectly conducting rectangular groove reflection grating; rigorous mode matching method; Bragg scattering; demultiplexing; electromagnetic scattering by periodic structures; frequency selective surfaces; gratings; microwave devices; millimeter wave antennas; multiplexing; periodic structures;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2013.2241715

Filename

6493429