Design of a Novel Wideband Printed Dipole Array Antenna

In this paper, a 32-element wideband low-profile printed-dipole array antenna is presented. Elliptical dipole is used as the array element, which exhibits a good wideband characteristic. Further bandwidth enhancement can be realized by loading a circular parasitic patch above the dipole. The parallel double transmission line, printed on the both sides of the substrate is utilized as feeding network, and a metal reflector is employed for gain enhancement and unidirectional radiation. The measurement results show that the antenna has an impedance bandwidth of 100% from 3GHz to 9GHz for VSWR <; 2.3, and stable directional radiation patterns. The total size is 3.6 λx3.6 λX0.38 A (A is the free-space wavelength at the center frequency).