An Integrated Quasi-optical Analysis Method and Its Experimental Verification
- PDF / 523,774 Bytes
- 15 Pages / 439.37 x 666.142 pts Page_size
- 77 Downloads / 198 Views
An Integrated Quasi-optical Analysis Method and Its Experimental Verification Junsheng Yu & Shaohua Liu & Liang Xu & Xiaoming Liu & Hangsheng Su & Yuan Mai & Qingang Wei & C. Rieckmann & R. Donnan & Xiaodong Chen & C. Parini & Jungang Miao & Ming bai
Received: 19 June 2009 / Accepted: 11 September 2009 / Published online: 25 September 2009 # Springer Science + Business Media, LLC 2009
Abstract This paper gives an overview on the design and analysis technique for quasioptical systems developed at Queen Mary, University of London and Beijing University of Posts and Telecommunications (BUPT) in collaboration with Beihang University. The design and analysis technique in question is an integration of two numerical methods. One applies Gaussian beam mode analysis to transport signal beams between focusing reflectors while accounting for diffractive processes, the other computes the emergent beam fields of either transmission and/or reflection for signal conditioning components interleaved between reflectors. A three dimensional visual software is developed based on the integrated method. The paper also presents the experimental verification of this design and analysis technique based on a dual-path quasi-optical network. Keywords Quasi-optical . Integrated method . DGBA . PMM . Experimental verification
J. Yu (*) : S. Liu : L. Xu : X. Liu : H. Su : Y. Mai : Q. Wei International Research Lab, School of Electronic Engineering, Beijing University of Posts and Telecommunications, 279Box, 10 Xi Tu Cheng Road, Haidian District, 100876 Beijing, China e-mail: [email protected] X. Liu e-mail: [email protected] L. Xu : X. Liu : H. Su : C. Rieckmann : R. Donnan : X. Chen : C. Parini School of Electronic Engineering and Computer Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK J. Miao : M. bai School of Electronic and Information Engineering, Beihang University, 100083 Beijing, China J. Miao e-mail: [email protected]
182
J Infrared Milli Terahz Waves (2010) 31:181–195
1 Introduction In millimetre wave and sub-millimetre wave remote sensing and radio-astronomy applications, several Quasi-Optical (QO) reflectors are cascaded to form a feed system, which forms a feed-beam to the main antenna [1, 2]. Such QO antenna systems are used at increasingly high frequencies up to the THz-band. However, the methods for the design and verification of QO systems are limited at present [3]. Geometrical Optics (GO) does not account for boundary diffraction. The Geometrical Theory of Diffraction (GTD), an extension to GO, fails at caustics. The Uniform Theory of Diffraction (UTD) can overcome the drawback of GTD, but cannot be easily employed for multi-reflector systems because of its non-modularity. Physical Optics (PO) is accurate but expensive in terms of computation time and storage for electrically large system. Furthermore, in such a QO Network (QON), the signal pre-conditioning components, such as polarisers and dichroics are often used, and these further compound against the computing ability and
Data Loading...
