Excitation techniques of loop current mode of ground antenna

Abstract

Excitation techniques of the antenna, which induce loop current mode on the ground plane, are described in this paper. The antenna element is a small rectangular ground clearance connected by a capacitor. It can be excited by a direct feeding, shunt-driven, or resonated loop feeding, and each feeding method gives a different impedance bandwidth of the antenna at the 2.4 GHz frequency band.