Low-Cost, Circularly Polarized, and Wideband U-Slot Microstrip Patch Antenna with Parasitic Elements for WiGig and WPAN Applications

In this paper, a wideband circularly polarized well-matched square microstrip patch antenna with a λ/4 feeding network suitable for fifth generation applications at 60 GHz (v-band) is developed. In order to increase the antenna bandwidth a U-slot with two parasitic elements at 60 GHz is designed and simulated. A single layer element with more than 7.2 dBi gain at the frequency of 60 GHz is achieved. The proposed antenna has a wide bandwidth extend approximately from 53.3 GHz to 60.8 GHz of more than 87 % efficiency and VSWR less than 2. The proposed antenna exhibits a circular polarization with Axial Ratio (AR) ≤ 3 dB in frequency band from 56 GHz to 57.2 GHz (1.2 GHz). The analysis and optimization processes throughout this paper are carried out using High Frequency Surface Structure (HFSS) simulator and verified with Computer Simulation Technology (CST) simulator. Good agreement between the results by the two simulators is obtained.