Dual-Band Printed Dipole Antenna with Parasitic Element for Compensation of Frequency Space Attenuation

Abstract

A Dual-band printed dipole antenna is proposed for 2.45 GHz Bluetooth (ISM) and wireless area network (WLAN) 5.8 GHz applications. The objective of the special design is to compensate the space attenuation difference between the frequency of 2.45 GHz and the frequency of 5.8 GHz. Like the space attenuation difference is about 3.5 dB, the studied antenna must to have 3 dB more gain at 5.8 GHz than at 2.45 GHz. The prototype is fabricated and measured, and the results are in good agreement with the simulated ones. The presented antenna achieves directional radiation in the two operating bands, and gets the performances that reflection coefficient better than -10 dB with sufficient bandwidth and gain 5-8 dB, making it suitable for the base station in wireless communications.