Abstract
A compact planar antenna operating at a frequency range of 3-16 GHz is presented for wideband applications. The antenna is composed of a square patch fed by a microstrip line and a partial ground plane with a rectangular slot. The proposed antenna is very easy to be integrated with microwave circuitry for low manufacturing cost. The flat antenna has a compact structure and the total size is 29 mm x 22 mm. The result shows that the measured impedance bandwidth (VSWRa parts per thousand currency sign 2) of the proposed antenna is 3.2-15.44 GHz, with a notch from 4.7 to 5.8 GHz. The effects of the structure parameters on impedance bandwidth are also investigated. Details of the proposed compact planar antenna design are presented and discussed.