Frequency reconfigurable bow-tie antenna array

A novel frequency reconfigurable bow-tie antenna array for Bluetooth, worldwide interoperability for microwave access (WiMAX) and wireless local area network (WLAN) applications is presented. This array comprises four double-sided bow-tie elements and an ultra-wideband feed network. By controlling the states of the pin diodes loaded on the radiators, the effective electrical lengths of bow-tie elements can be changed, thus the operating band of the array can be electronically switched between three different frequency bands. A prototype was fabricated and measured, and the results are in good agreement with the simulations, which shows that this array is a good candidate for multi-radio wireless applications.