NOVEL DESIGN OF A PRINTED MONOPOLE ANTENNA FOR WLAN/WiMAX APPLICATIONS.

In this article, a novel design of a printed coplanar waveguide (CPW)-fed monopole antenna is implemented to simultaneously satisfy wireless local area network (WLAN,) and worldwide interoperability for microwave access (WiMAX) applications. First, a printed half-elliptic monopole antenna constructed for broadband operation. A printed half-elliptic monopole antenna, with two sections of the metal surface etched, was then investigated to obtain a dual-band operation with two bands: 2.30 to 4.15 GHz and 4.93 to 5.83 GHz. The low band (2.5 to 2.7 GHz) is quite near the middle band (3.3 to 3.8 GHz) of WiMAX, resulting in a large coupling effect or interference between these two bands; a band-reject function is needed to suppress the undesired frequency band between the low band and the middle band of WiMAX. Therefore, by etching two narrow slits on the dual-band printed mono pole antenna, a triple-band antenna design for WLAN/WiMAX applications can be obtained. The low cost, ease of manufacture, good impedance match and good radiation pattern properties of the proposed antenna are also investigated. [ABSTRACT FROM AUTHOR]