Microstrip-fed printed dipole antenna for 2.4/5.2 GHz WLAN operation

In order to satisfy the 2.4 GHz band of IEEE 802.11b and the 5.2 GHz band of the IEEE 802.11a WLAN standard, dual-band operation in the 2.4 GHz (2412-2484 MHz) and 5.2 GHz (5150-5350 MHz) bands are demanded in practical WLAN applications. A new microstrip-fed dual frequency printed dipole antenna is presented. With an inverted-L slit embedded into both arms of the dipole, a dual-band operation is generated in a single antenna. The proposed design does not require separate dipole arms to achieve two separate operating bands, and it has a shorter length of arm than the design in Suh et al. (2000). The proposed antenna can easily be excited by a 50-Ω microstrip line and a pair of parallel metal strips between the dipole and the microstrip line, and good impedance matching can be obtained for operating frequencies within both 2.4 and 5.2 GHz bands.