Multiple-Feed Coupling Measurements For Luneburg Lens Antenna

Mutual coupling measurements between two feeds of a Luneburg lens are presented in this paper. A 356 mm diameter Luneburg lens with two WR90 feeds is used to perform measurements within the 8-11 GHz frequency range. Results of mutual coupling with and without lens are presented for different spacing between the feeds for both vertical and horizontal polarization. Measurements with four feeds are also presented.