Dual band microstrip antenna for wireless LAN application

This paper discusses the design of the multiband microstrip antenna operating at frequency 2.4 GHz and 5.2 GHz. The aim of the project is to design a dual band microstrip antenna which will be operating in the wireless LAN band, IEEE 802.11 a/b/g. The dimensions of the single elements of the operating frequencies were calculated using transmission line model. Two elements of inset fed microstrip antenna were used for each frequency band. In this paper, there are four elements to cover the frequency band for WLAN application. The simulation process was done using the Agilent ADS software. The scaling factor of 1.03 has been chosen for the design starting from the lowest resonating frequency at 2.4 GHz band, while at 5.2 GHz band, the scaling factor is 1.05. The difference on the scaling factors was contributed by the losses that occurred when combining both of the antenna elements from both bands of frequency. The antenna has been fabricated on the FR4 microstrip board with /spl epsi//sub /spl tau// = 4.5 and tan /spl delta/ = 0.019 using the wet etching technique.