A New Design of Dual-Port Active Integrated Antenna for 2.4/5.2GHz WLAN Applications

A new design of dual-port monopole-slot-like microstrip active integrated antenna (AIA) is presented and discussed in this paper. The primary designed passive antenna is capable of supporting two different WLAN bands at 2.4–2.84 GHz and 5.15–5.35 GHz due to its dual-port structure. In order to reduce the transmission coefficient between the two ports of antenna a coupling sleeve-arm and an inverted T-shaped slot are utilized on the ground plane of antenna each beneath one of the corresponding feed-lines which act as filtering structures at desirable frequencies. The proposed passive dual-port antenna is integrated with a power amplifier (PA) and a low noise amplifier forming a dualport microstrip AIA which can be used as a full-duplex transceiver at its operating WLAN frequency bands. The measured results for both passive and active antennas show that the designed antennas have proper radiation characteristics at their desired operation frequencies. The fabricated passive antenna exhibits dual-band performance at 2–3.42GHz and 4.5–5.6 GHz while the fabricated AIA covers 2.31– 2.82GHz (at PA port) and 4.45–5.5GHz (at LNA Port) with 13 dB and 9 dB gain level improvement respectively.