A Novel Wideband Microstrip Diversity Antenna for Mobile Communications

In this paper a novel printed diversity antenna designed on a ground plane with size of PCMCIA card of a laptop, is proposed. The antenna by using two similar and symmetric monopoles is designed to operate in 5GHz band and present low mutual coupling, sufficient gain and finally suitable data transmit rate. The operation band includes 5.2GHz and 5.8GHz WLAN applications and 5.6GHz HYPERLAN and 5GHz Wimax. The low mutual coupling is achieved by using optimized structure of ground plane and additional branches two monopoles on the back of substrate. The radiation pattern for proposed antenna in resonance frequency is shown when exciting ever monopole and in general cover complimentary space region. The diversity performance is evaluated by calculating the envelope correlation coefficient and mean effective gain to prove that the proposed antenna can provide pattern diversity.