CPW-fed Triangular Monopole Antenna for Wideband Dual-frequency Application

A novel wide-band design of a finite ground coplanar waveguide (CPW)-fed monopole antenna is presented for simultaneously satisfying wireless local area network (WLAN) and worldwide interoperability for Microwave Access applications. And simple wideband dualfrequency design of a coplanar waveguide (CPW)-fed triangular planar monopole antenna is proposed.. Both theoretical and experimental results of bandwidths and radiation characteristics for prototypes of the proposed antenna have been presented. The measured ?10 dB impedance bandwidth at the lower band (1.71 GHz) is about 240 MHz and that at the upper band (5.62 GHz) reaches about 2 GHz, which cover the DCS1800 and the IEEE 802.11 WLAN standards, respectively. Good monopole-like radiation patterns with antenna gains of 2.3–3.6 dBi and 3.9– 5.6 dBi over the lower and upper bands, respectively, have also been obtained.