A NEW DESIGN OF DUAL-PORT ACTIVE INTEGRATED ANTENNA FOR 2.4/5.2 GHZ 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 difierent WLAN bands at 2.4{2.84GHz and 5.15{5.35GHz due to its dual-port structure. In order to reduce the transmission coe-cient 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 flltering structures at desirable frequencies. The proposed passive dual-port antenna is integrated with a power amplifler (PA) and a low noise amplifler forming a dual- port 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{5.6GHz while the fabricated AIA covers 2.31{ 2.82GHz (at PA port) and 4.45{5.5GHz (at LNA Port) with 13dB and 9dB gain level improvement respectively.