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The paper describes a dual-band miniaturized printed monopole for integration in modern wireless systems. The printed monopole is augmented with two arms, resonant at slightly different frequencies, providing a broadened response for the upper band. The achieved bandwidth for the high band is 36%. These antennas are proposed for the emerging dual-mode multi-band WLAN transceivers, which operate over a wide range of bands as dictated by national authorities. Measured and simulated data, including return loss, antenna gain and radiation patterns, are presented. The numerical method employed was the finite integration technique.
Ammann, M., Farrell R.: Dual-band monopole antenna with stagger-tuned arms for broadbanding. IWAT 2005. IEEE International Workshop onAntenna Technology: Small Antennas and Novel Metamaterials, pp.278-281. 7-9 March, 2005.