A novel miniaturized triple-band antenna

In this work we have theoretically analysed a bi-layer waveguide placing a magnetic metamaterial on Double Positive (DPS) material and then implemented the waveguide as substrate for microstrip patch antenna and achieved 30% size reduction. This patch antenna operates at three different bands and the radiation gain at each band is quite high with a moderate bandwidth of each band. These bands have potential applications in WLAN and WiMAX devices. Flexibility for band tuning is possible in this antenna.