Performance Analysis of a Wilkinson Power Combiner-Fed Patch Antenna for 300-GHz Arrayed Photomixers

Abstract

We analyzed the performance of a microstrip patch antenna fed by a 2 by 1 Wilkinson power combiner at 300 GHz. Simulation results show that a 2.54 dB gain in total radiated power can be achieved when the Wilkinson power combiner is used to feed the antenna compared to a single-port power feed. Results further show that the combiner provides a good isolation of -21.5 dB between the input ports. Additionally, the peak power in the +z (theta =0) direction for both xz and yz planes increases by 4.8 dB.