Design of a high selective triple band integrated reconfigurable filtering antenna for wideband and narrowband applications

Abstract The manuscript contributes a novel triple band integrated reconfigurable filtering antenna for wideband and narrowband applications. First, a compact dual band reconfigurable filter is conferred composed of two folded half-wavelength high impedance T-shaped resonators. The lower half of the feed lines comprises T-shaped resonator to obtain a passband from 2.8 to 3.5 GHz in order to cater WiMax band. The resonator at the upper half of the feed lines generates a passband from 5.15 to 5.75 GHz for WLAN operations. A transmission line is inserted underneath the feeding line to establish additional transmission zeroes. Two uniform impedance resonators (UIRs) are incorporated to the proposed dual band filter so that it can discard a band from 5.35 to 5.45 GHz by creating a notch at 5.4 GHz. Presence of notch band separates the WLAN band into two sub-bands. Thus, the proposed dual band filter can be easily reconfigured to a triple band bandpass filter. Later, a broadband antenna is implemented using a ground ring and an inverted L-shaped resonator which is radiating from 2.6 to 6 GHz. In the end, the filter is integrated with the antenna structure to develop the suggested triple-band reconfigurable filtering antenna. The developed filtering antenna is fabricated that perceives a fine agreement between the measured and the simulated response.