O'Sullivan, Créidhe and Murphy, J.Anthony and Trappe, Neil and Lanigan, William and Colgan, R. and Withington, Stafford (1999) The Gaussian Beam Mode Analysis of Phase Gratings. Proceedings of SPIE, 6893. pp. 358-371. ISSN 0277-786X

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Abstract

Phase gratings find useful application in array receivers as passive multiplexing devices in the local oscillator injection chain. In particular, the Dammann phase gating is one of the simplest class to model and manufacture, and can be used to generate multiple images of a single input beam in a quasi-optical system. It is a binary grating consisting of a regular arrangement of milled slots or recesses in some suitable transparent dielectric or conducting block of material. The basic operation of the phase grating can be understood in terms of Fourier optics. However, Gaussian beam mode analysis is a powerful tool when investigating the limitation of the grating in a real submillirneter system of finite throughput and bandwidth. This is especially the case when evaluating the coupling to an array of horn antenna feeds. In this paper we present the results of our investigation into the modelling of phase gratings using Gaussian beam modes analysis and discuss new experimental measurements.

Item Type:	Article
Keywords:	Gaussian Beam Mode Analysis; Phase Gratings; multiplexing devices; Dammann phase gating;
Academic Unit:	Faculty of Science and Engineering > Experimental Physics
Item ID:	9862
Identification Number:	https://doi.org/10.1117/12.763624
Depositing User:	Dr. Neil Trappe
Date Deposited:	31 Aug 2018 15:44
Journal or Publication Title:	Proceedings of SPIE
Publisher:	SPIE
Refereed:	Yes
URI:	https://www.spiedigitallibrary.org
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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