A low cost UWB printed dipole antenna with high performance

Abstract

This paper introduces a new ultra-wideband (UWB) printed circular dipole antenna with a hidden feed line. The specific feeding removes any radiation pattern disturbance generally met with this kind of antenna when fed with a coaxial or a microstrip line. The dipole is smaller than a quarter-wavelength unlike more traditional dipole. For a low cost realization, the antenna has been implemented on a FR4 substrate. Measurements have been done and show good performance both in terms of matching and radiation pattern over a wide frequency bandwidth. The design and the measurements are presented hereafter.