Title :
Effect of profile errors with large correlation diameter on axisymmetric antenna crosspolarisation
Author :
Jervase, Joseph A. ; Ghobrial, S.I.
Author_Institution :
University of Khartoum, Electrical Engineering Department, Faculty of Engineering & Arch., Khartoum, Sudan
Abstract :
The effect of profile errors with large correlation diameter on the boresight crosspolarisation of axisymmetric antennas is investigated. An expression for boresight isolation as a function of the correlation diameter, the r.m.s. surface error and the polarisation efficiency of the antenna is given. Curves of isolation as a function of the r.m.s. surface error and the correlation diameter are given for polarisation efficiencies of 0.99 and 0.999 (i.e. for antennas with peak off-axis cross-polarisation of ¿25.3 dB and ¿35.4 dB, respectively).
Keywords :
antenna theory; reflector antennas; axisymmetric antenna cross polarisation; boresight isolation; correlation diameter; profile errors;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19800470
