A log-periodic microstrip patch antenna design for dual band operation in next generation Wireless LAN applications

In this paper, the design and simulation study of a dual-band inset-fed log-periodic microstrip patch antenna is presented for next generation Wireless LANs. The microstrip antennas are preferred for applications where small size antennas are required which leads to the drawback like narrow bandwidth. To overcome this shortcoming in microstrip antennas, several design techniques are proposed one of which is log-periodic antenna design which is studied in this paper. The aim of this study is to propose an antenna design that can operate at both Wireless LAN frequency bands of 2.4GHz and 5GHz. The designed antenna consists of four radiating elements which cover IEEE 802.11 a/b/g Wireless LAN bands. Two inset-fed antenna elements are used for single frequency band i.e. for 2.4GHz and 5GHz bands. The dimensions of single element were calculated using transmission-line model. The layout of the antenna was simulated in momentum - an EM tool of Agilent´s Advance design (ADS) system simulator.