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U-Slot Dual Band Aperture Coupled Microstrip Antenna for WLAN And WiMAX Applications

Microstrip antennas are very cheap and their cost of fabrication is also very less. Most of the wireless communication systems are based on these antennas. Though it has many advantages, there is one drawback which is narrow bandwidth. Aperture coupling technique helps to improve this bandwidth upto some extent. Therefore, this technique has been used in the design which is demonstrated in this paper. Here the substrates used in aperture feeding have thickness of 1.57mm. This antenna has bandwidth of 74.5 MHz at 3.62 GHz frequency and 111 MHz at 5.772 GHz frequency. Both these operating frequencies have application in WLAN and WiMAX bands. The simulation is done using CST 2010 software.