A novel quadruple-fed rectangular patch antenna with improved bandwidth performance

A novel quadruple feeding mechanism for a rectangular patch antenna is proposed. A successive phase shift caused by path inequality between four possible symmetrical feeding points is introduced, in order to achieve wideband operation at the 2 GHz frequency band. This work is an extension to the idea of acquiring a pair of resonances and forcing them to behave in a consolidated way. This concept is verified in previous work and is herein stretched to the limit that a rectangular patch could provide speaking in terms of symmetry, i.e. using four feeding points. The proposed antenna exhibits a fractional bandwidth of 3.46 %, almost four times as much as the conventional single-fed patch does. Furthermore, the antenna presents circular polarization and an elevationuniform radiation pattern. VSWR, Impedance matching as well as Antenna and Radiation Efficiency are also presented and annotated.