Design and implementation of dual-band square patch antenna for wireless LAN of 2.4GHz and 5.7GHz

In this paper, we design and implement the dual-band square patch antenna for IEEE 802.11b (2.4GHz /spl sim/ 2.4835 GHz) and IEEE 802.11a (5.725GHz /spl sim/ 5.825GHz) frequency bands. The antenna was designed by using H-shaped slots. We designed patch antenna by using computer simulation program Ansoft Ensemble, and then some tuning followed with measurements. Measured -10dB bandwidths are 114MHz, 172MHz for low-band and high-band, respectively. And measured S/sub 11/, maximum gains and half-power beamwidths are, -28dB, 8.45dBi, 72/spl deg/ for low-band at 2.440GHz and -16dB, 6.31dBi, 46/spl deg/ for high-band at 5.775GHz, respectively.