hi...i want to design a patch antenna with 12% bandwidth and 120 degree beamwidth..so far i ve achieved 115 degree beamwidth and 8.8% bandwidth with meander line element on a rtduroid substrate (er=2.2) n i have also introduced an airgap of 25.4mm between ground and substrate..freq of operation is L band
how can i improve my bandwidth without reducing the beamwidth?
anybody please help me out...
Bandwidth can be increased creating more than one resonance.
Aperture-coupled patch is a suitable feeding method that allows this. How are you feeding the patch?
Other methods are stacked patches and coplanar parasitic elements, among others.
Look for chapter 9 of "Microstrip Antenna Design Handbook" by Garg, Bhartia, Bahl, and Ittipiboon (Artech House, 2001).
Regards
Bandwidth can be increased creating more than one resonance.
Aperture-coupled patch is a suitable feeding method that allows this. How are you feeding the patch?
Other methods are stacked patches and coplanar parasitic elements, among others.
Look for chapter 9 of "Microstrip Antenna Design Handbook" by Garg, Bhartia, Bahl, and Ittipiboon (Artech House, 2001).
Regards
Beamwidth does not depend strongly of the feeding method, but mainly of the geometry.
Take into account that beamwidth is different in the E and H planes.
Regards