Double-C patch antenna: A very compact radiating element

One can reduce dramatically the sizes of the planar antennas by introducing short-circuits in the structure of the antennas. In this paper we present a miniaturized C-patch antenna excited by means of a coaxial probe. The ant enna consists of two stacked C-shaped elements connected together with a ve rtical conducting plane. The antenna is designed on an air substrate and of fers attractive dimensions, being five times lower than those of a conventi onal half wavelength microstrip patch antenna operating at the same frequen cy. Firstly one presents the optimal geometry of the antenna and the result s of the simulations which are compared with measurements in regard to the input impedance and radiation patterns. From this optimal configuration, a study parametric has been investigated for the all sizes of the antenna, in order to show the influence of each one on the resonance frequency and the bandwidth. We will present also an application where this antenna is used in a proximity communication system between two computers.