A Wideband Dipole Antenna Using a Impedance-matched Network

An impedance-matched network is introduced in this paper, which is composed of two capacitors, one inductor, and one resistor, and is used to broaden its bandwidth in the feeding point of the dipole antenna proposed by N. Amani. The form of the impedance-matched circuit and the value of every element are optimized by Genetic Algorithm in the commercial software, Advanced Design System (ADS). It is quite easier to the method used in the N. Amani's paper and with smaller volume. The bandwidth (VSWR<1.5) of 30-512MHz is obtained which is better than the result in original paper.