Dual-band bow-tie slot antenna fed by coplanar waveguide

A dual-band coplanar waveguide (CPW)-fed bow-tie slot antenna is proposed, which consists of a bow-tie slot, a pair of sector parasitic patches and a modified grounded plane with a band-notch property. The impedance matching, the resonant mode, the radiation patterns and the current distributions are studied. To generate dual-band characteristics, a V-shaped slot is etched on the radiating ground. Experimental and simulated results demonstrate that the antenna exhibits two separate impedance bandwidths of 1450 MHz (about 32.8% centred at 4.43 GHz) and 3500 MHz (about 37.8% centred at 9.25 GHz), which satisfy aircraft radar and X-band applications.