Design of CPW-fed Capacitive Coupled Patch Antenna for WiGig Applications

— The area of microstrip antennas has seen some inventive work in recent years and is one of the most dynamic fields of antenna theory. The ever increasing need for mobile communication and the emergence of newer technologies require an efficient design of antenna of smaller size for wider frequency range applications such as WiGig. The design, simulation, and characterization of a CPW-fed microstrip antenna capable of covering the entire IEEE 802.11ad (WiGig) frequency band (57–66 GHz) has been presented in this paper. A conductor-backed (CB) coplanar waveguide (CPW)-fed loop slot couples the energy to the patch antenna, resulting in a broad bandwidth. The substrate used here is quartz substrate (r=3.9, tan δ=0.0002 at 60 GHz), on top of which an SU-8-based three-dimensional (3-D) structure with air cavities has been placed. The patch metallization is deposited on top of this 3-D structure. Simulation of the proposed antenna has been carried out for different geometries and impedance tuning coupling mechanisms. Parametric study was included to determine the effect of design towards the antenna performance. The design was optimized to meet the best possible result. The proposed antenna has also found to be promising to be embedded with devices employing WiGig applications.