Narrow Wall Slotted Planar Array Antenna by using Differential Feed at X Band

A 8×8 narrow wall planar slotted array antenna by using differential feed with enhanced gain and reduced cross polarization radiation at X band has been proposed. A H-plane tee is designed to feed the narrow wall planar slotted waveguide array by using series-shunt rectangular couplers. Metallic flares are added to narrow wall of each waveguides to reduce the cross polarization level. The simulated gain is 23.3dB and 26.9dB without the differential feed and with the differential feed respectively, at 10GHz frequency.