A Wideband Capacitive Probe-Fed Millimeter-wave Microstrip Antenna

A single-layer capacitive feeding structure is proposed to design a wideband millimeter wave microstrip antenna, which the radiating and feeding patches are located at a single layer. As the purpose of obtaining suited impedance, the radiating patch is fed by coupling of the feeding element which compensates the additional inductance of using probe-fed. The bandwidth (VSWR < 2) of the designed antenna is 52.5% (25.3 GHz~ 43.3 GHz).