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Frequency Diversity Antenna for WLAN Applications

A novel frequency diversity antenna is designed for WLAN applications. Square ring slot is incorporated in ground plane for achieving the frequency diversity. The proposed antenna contains rectangular slots which are incorporated in square patch. RT duroid 5880 substrate is used for simulation purpose. Extensive simulations are performed in CADFEKO for antenna design and analysis. The proposed antenna presents a basic model which is able to cover entire U-NII radio band which is used by IEEE802.11a devices and many wireless internet service providers. Copper slits are used as ideal switches in the rectangular slots to achieve frequency diversity.