Research papers

A frame based Gaussian beam expansion method which can be used for analysis of quasi-optical beam waveguides is presented. The method is tested for the scattered field of an ellipsoid at 321 GHz and 3.21 THz. Publication: Proceedings 13th Intl….

Two ways of modelling a compact range design are presented, and the coupling to a given antenna under test (AUT) is determined and compared to the AUT far field. The compact range models are both based on physical optics (PO)….

In this paper bolometric detectors applied in conjunction with reflector antenna feed horns that support multiple modes are studied. As an example, the preliminary design of the Planck telescope is used to calculate both the receiving pattern of the feed…

The design of a sector-beam antenna is described. The azimuth and elevation patterns are subject to stringent requirements on gain and isolation. A PO based synthesis method is applied to generate a shaped reflector surface that radiates the desired pattern…

A comparison of the Fast Fourier Transform (FFT) and direct numerical integration to solve the PO integral is presented, with special emphasis on the achieved accuracy and the CPU time consumption. The concept of second order FFT is introduced. It…