Design of Compact L/Ka-Band Shared-Aperture Patch Antenna Array

Design of a L/Ka-band shared-aperture patch antenna array is investigated. Compared with previously reported dual-band antenna architectures with wide frequency separation utilizing a multilayer structure, the current configuration presents a compact dual-band design over a single substrate. The L-band and Ka-band antennas consist of 2×2 and 14×10 microstrip patch antenna arrays respectively. The L/Ka-band patch arrays are excited through microstrip corporate feed networks. The design is optimized to achieve adequate impedance match for the array at L and Ka-bands. Antenna gains of 7.74 dBi and 26.20 dBi are obtained at the corresponding resonant frequencies at the L and Ka-bands respectively.