A study of amplitude and phase shaping effects in beam waveguides

Author

Rengarajan, S.R. ; Galindo-Israel, V. ; Imbriale, W.

Author_Institution

Dept. of Electr. & Comput. Eng., California State Univ., Northridge, CA, USA

fYear

1990

fDate

7-11 May 1990

Firstpage

1502

Abstract

Results of an investigation into the shaping amplitude and phase distribution of a low-frequency input pattern into a beam waveguide are presented. Dual offset shaped reflectors can be designed to realize the amplitude and phase distribution of such an input pattern. The desired object functions for the dual reflector synthesis and their aperture were determined using the spherical wave expansion method. The results obtained show that for beam waveguide designs using reflectors of diameters less than 27 lambda , there is insufficient control of the output phase center at the second aperture. For larger-sized reflectors, it is possible to have some design tradeoffs between spillover loss and defocusing by controlling the input aperture amplitude and phase distribution.<>

Keywords

antenna feeders; antenna radiation patterns; reflector antennas; waveguide antennas; amplitude shaping effects; beam waveguides; dual offset shaped reflector antennas; input aperture amplitude; low-frequency input pattern; object functions; output phase center; phase distribution; phase shaping effects; reflector synthesis; spherical wave expansion method; spillover loss; Apertures; Diffraction; Frequency; Gaussian distribution; Geometrical optics; Laboratories; Mirrors; Optical design; Optical waveguides; Propulsion;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115401

Filename

115401