Wideband Printed and Double-Sided Dipole Four Elements Array Antenna on 5.2GHz UNII Band

The feature of printed and doubled-sided dipole pair wideband antennas in application of 5.2 GHz UNII band operated in WLAN access point has been demonstrated in this paper. The printed dipole array antenna consists of one dipole array arranged back to back and can be easily implemented by printing on both sides of a dielectric substrate and is suitable for integration with monolithic microwave integrated circuit (MMIC) module. Based on the matching technology, which includes of a 50 Omega microstrip feed line with quarter-wavelength transformer matched circuits is designed. Properties of the radiator as an array element have also been investigated. Simulator IE3D is used to verify our analysis. Both simulation and measured data are pretty matched. According to the measured results, the measured gain for 5.2 GHz band is between 3.8 and 5 dB and the bandwidth with VSWR less than 2 is about 400 MHz.