A Microstrip PatchArray withAperture-Coupled Feeding forKa-Band Applications

Abstrac -A Ka-bandmicrostrip patchantenna array withaperture-coupled feeding ispresented inthispaper. Fora single element antenna, animpedance bandwidth (return loss < -10dB)of2GHzisachieved atthecentral operating frequency of30GHz.A 2x2arrayanda4x4 arrayaresimulated, andlarger arraywithmoreelements istheoretically estimated. Potential applications ofthe designed Ka-bandpatcharrayinclude thesatellite digital communications. I. INTRODUCTION Microstrip patchantennas arethefirst-choice in manycircumstances duetothelight weights andthin profile configurations. Different feeding methods are invented tosuit thestructures andmeetthebandwidth andpolarization requirements. Microstrip line feeding andcoaxial probe feeding arethedominating meansif therequirements forbandwidth andcross-polarizati on