The merits of symmetrical and diagonally-symmetrical monopulse slot arrays

Author

Coetzee, J.C. ; Tan, W.L. ; Joubert, J.

Author_Institution

Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore

Volume

3

fYear

1999

fDate

1999

Firstpage

914

Abstract

The designer of monopulse slot arrays has to make a selection between either a symmetrical configuration where the quadrants are mirror images of each other, or a diagonally-symmetrical configuration where quadrants are mirror images of their respective diagonal counterparts. The symmetry of the former guarantees good difference mode pattern performance over an appreciable frequency range, but non-uniform inter-element spacing in the E-plane may give rise to sum pattern distortion. On the other hand, small variations in the off-centre-frequency input impedance for the sub-arrays of diagonally-symmetrical arrays may affect their difference mode performance. This paper presents a study on the advantages acid disadvantages of using the two different configurations by theoretically assessing the performance of a number of representative examples

Keywords

antenna radiation patterns; antenna theory; slot antenna arrays; E-plane; H-plane; diagonally-symmetrical monopulse slot arrays; difference mode pattern performance; mirror images; nonuniform inter-element spacing; off-centre-frequency input impedance; quadrants; sub-arrays; sum pattern distortion; symmetrical monopulse slot arrays; Africa; Design engineering; Feeds; Frequency; Impedance; Inspection; Magneto electrical resistivity imaging technique; Mirrors; Pattern analysis; Performance analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1999 Asia Pacific

Print_ISBN

0-7803-5761-2

Type

conf

DOI

10.1109/APMC.1999.833743

Filename

833743