COMPACT PATCH ANTENNA WITH VERTICAL POLARISATION

Abstract

This communication proposes a compact, low-profile patch antenna with vertical polarization.A pair of shorted patches are excited in-phase to achieve the vertical polarisation. The principle is to excite two back-to-back arranged shorted patches to generate symmetrical electric-field (E-field) distributions normal to the ground plane. Based on this study, we found that the spacing in between the two patches have little influence on the radiation characteristics, which provides another flexibility in the design. In addition,the shape of the patch and the corresponding field distribution . To improve the impedance bandwidth,gain and reduces the power losses. In this work, the beam steering controlled by the transmitter’s frequency without use of any phase shifter . The beam steering is a simple function of the frequency.which can alter the phase or signal delay electronically, thus steering the beam of radio waves to a different direction. showing that the proposed antenna is suitable for potential surface-mount wireless applications.