A microstrip-fed wide-band tapered slot antenna

Research on wide-band, low-profile antennas has been steadily increasing in the past several years due to more demanding requirements from the aerospace industry. This paper presents the simulation investigations of a printed microstrip slot antenna. It provides a wide impedance bandwidth adjustable by variation of its parameters, such as the relative permittivity and thickness of the substrate, width, and location of the slot in the ground plane, and feed and ground plane dimensions. The ground plane is small,40 mm 63mm. The antennas intrinsic weakness (the bandwidth is narrow), limits its application. Research of expanding its bandwidth seems more important. This paper shows a kind of structure of expanding bandwidth of a microstrip-fed slot antenna.The benefit in the band keeps above the 3dB. And it makes the antenna keeping impedance matched well from 2.6GHz to 9GHz (S11 = -10dB).