Investigations on Shaped Mirror Systems in Quasi-Optical Mode Converters Based on Irradiance Moments Method

Hai Wang; Zejian Lu; Xiaoming Liu; Junsheng Yu; Yuan Yao; Xiaodong Chen; Limei Qi; Zhijiao Chen

doi:10.1155/2016/8043042

International Journal of Antennas and Propagation (Jan 2016)

Investigations on Shaped Mirror Systems in Quasi-Optical Mode Converters Based on Irradiance Moments Method

Hai Wang,
Zejian Lu,
Xiaoming Liu,
Junsheng Yu,
Yuan Yao,
Xiaodong Chen,
Limei Qi,
Zhijiao Chen

Affiliations

Hai Wang: BUPT-QMUL EM Theory & Application International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Zejian Lu: BUPT-QMUL EM Theory & Application International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Xiaoming Liu: BUPT-QMUL EM Theory & Application International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Junsheng Yu: BUPT-QMUL EM Theory & Application International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Yuan Yao: BUPT-QMUL EM Theory & Application International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Xiaodong Chen: School of Electronic Engineering and Computer Science, Queen Mary University of London, London E1 4NS, UK
Limei Qi: BUPT-QMUL EM Theory & Application International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Zhijiao Chen: BUPT-QMUL EM Theory & Application International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

DOI: https://doi.org/10.1155/2016/8043042
Journal volume & issue: Vol. 2016

Abstract

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A method of transforming high-order Gaussian beams (GBs) mode into circular symmetry fundamental Gaussian beam (FGB) mode with arbitrary waist size is presented using irradiance moments method in quasi-optical (QO) mode converters. The double shaped mirrors correcting amplitude and phase simultaneously are generated by a single incidence irradiance sampling data and known ideal output FGB taking advantage of linear moment matching technique and Fresnel diffraction theory, which can be applied to a wide frequency range especially significant for terahertz band. The numerical coding procedure of creating double correcting mirrors and its fast convergence speed are discussed at 325 GHz. Numerical and experimental comparisons reveal the conclusion that enhancing surface precision and increasing moments order can improve main lobe levels.

Published in International Journal of Antennas and Propagation

ISSN: 1687-5869 (Print); 1687-5877 (Online)
Publisher: Hindawi Limited
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Social Sciences: Transportation and communications: Cellular telephone services industry. Wireless telephone industry
Website: https://onlinelibrary.wiley.com/journal/8039

About the journal