Bandwidth improvement for crossed-dipole type antennas using a tuning plate

Significant bandwidth improvement is achieved on the crossed-dipole antenna using the tuning plates. The tuning plate was tested on the foursquare and fourpoint antennas. The test models demonstrate that a tuning plate increases the bandwidth of crossed-dipole type antennas up to 25% over that for the same antenna without the tuning plate. The foursquare and fourpoint antennas with the tuning plate are good candidates for dual-polarized, multi-functional antenna applications and for MIMO systems.