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Design of Compact CPW‐FED Monopole Antenna for WLAN/WiMAX Applications Using a Pair of F‐Shaped Slits on the Patch

In this article, a compact and small coplanar waveguide fed (CPW‐fed) monopole antenna is proposed for wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications. In the proposed antenna, the main target is to present a compact structure with a step‐by‐step design procedure on the patch. The antenna consists of a slotted rectangular patch as radiator, a partial CPW‐ground plane. To excite WiMAX/WLAN bands, two F‐shaped slits are inserted into the rectangular patch that resonates at the frequencies of 3.5 and 5.4 GHz. By suitable adjusting the lengths of the F‐shaped design, much wider impedance bandwidth can be produced, especially at the lower band of WLAN/WiMAX. The size of the antenna is 15 × 15 × 1.6 mm3. A prototype of the designed antenna is constructed and experimentally investigated. The −10 dB S11 bandwidths of them are (3.15–4.63 GHz) and (4.75–6.62 GHz), respectively, which can cover both the WLAN bands (5.15–5.35 GHz and 5.725–5.825 GHz) and the WiMAX bands (3.4–3.6 GHz and 5.25–5.85 GHz). Proper omnidirectional radiation pattern characteristics and enough gains are obtained over the operating bands. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2337–2340, 2013