Resonator-loaded monopole antenna with triple band performance for WLAN/WiMAX applications

This paper presents an asymmetric loaded monopole for applications requiring efficient triple band performance. The design is based on the concept of non resonant traps using two different loading resonators to obtain the triple band performance. The first band is mainly produced by the first resonance of the monopole, the mid band is added by the large resonator and the third band is a combination of the effects of the small resonator and the second resonance of the monopole. As proof of concept an asymmetric triple band monopole for WLAN (802.11) / WiMAX (802.16) systems has been designed, fabricated and measured.