Title :
Minimising mutual coupling in thick substrate microstrip antenna arrays
Author :
Bamford, L.D. ; James, J.R. ; Fray, A.F.
Author_Institution :
Defence Res. Agency, Great Malvern, UK
fDate :
4/10/1997 12:00:00 AM
Abstract :
A new method based on the reaction concept, is used to assess the mutual coupling experienced by two adjacent circular microstrip antennas on a thick substrate. The coupling owing to surface waves is separated out from that due to the direct radiation and the large interference effects exhibited by the former create deep nulls in the overall mutual coupling characteristic: the nulls being dependent on the given choice of substrate geometry and element separation distance. Finally, the application of this coupling minimisation technique to practical arrays having many elements is briefly commented on
Keywords :
antenna radiation patterns; antenna theory; interference (signal); microstrip antenna arrays; substrates; adjacent circular microstrip antennas; deep nulls; direct radiation; element separation distance; interference effects; mutual coupling; reaction; substrate geometry; surface waves; thick substrate; thick substrate microstrip antenna arrays;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970448
