Asymptotic transition region theory for edge diffraction. II. Calculation of diffraction losses in multireflector antennas

Author

Kildal, Per-Simon

Author_Institution

ELAB-RUNIT, Norwegian Inst. of Technol., Trondheim, Norway

Volume

38

Issue

9

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1359

Lastpage

1365

Abstract

For pt.I see ibid., vol.38, no.9, p.1350-8 (1990). Asymptotic formulas that can be used to calculate diffraction losses in a multireflector antenna without having to integrate rapidly varying fields over the reflector surfaces and the aperture are presented. Two kinds of losses caused by edge diffraction are considered: the reduction in antenna efficiency and the increase in spillover. The asymptotic formulas are obtained from the standard transition region field introduced in part I and are expressed in terms at the Δρ defined there

Keywords

antenna theory; electromagnetic wave diffraction; geometrical optics; reflector antennas; antenna efficiency; asymptotic transition region theory; diffraction losses; edge diffraction; geometrical optics; multireflector antennas; reflector antennas; spillover; Antenna feeds; Antenna theory; Aperture antennas; Observatories; Optical diffraction; Optical surface waves; Optical waveguide theory; Optical waveguides; Reflector antennas; Satellite antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.56986

Filename

56986