A Dual-Band Slotted Antenna at 2.4/5.8GHz for ISM Band Applications

This paper presents a microstrip antenna with dual-band operating frequencies by etching multiple slots on the radiating patch of the antenna. In wireless communication systems, microstrip antenna operating at multiple frequencies are in demand and has a significant influence for ISM (Industrial Scientific Medical) applications. The proposed antenna is specifically designed to operate at both 2.4 and 5.8 GHz ISM frequency band. The dual-band antenna was designed and simulated using CST-MWS software with a patch dimension of
$39.4\ \text{mm}\times 39.5\ \text{mm}\times 1.575\ \text{mm}$
, and mounted on a RT/duroid 5880 substrate with a dielectric constant
$\varepsilon_{r}=2.2$
, loss tangent of
$\delta=0.0009$
and thickness of 1.575 mm. Based on the results, the antenna exhibit an
$S_{11}$
of −29.23 dB and VSWR of 1.07 at 2.4 GHz, and
$S_{11}$
of −18.55 dB and VSWR of 1.26 at 5.8 GHz. The good consistency between
$S_{11}$
predicted and measured results confirm the antenna's ability to be implemented for ISM band applications such as Wi-Fi, WLAN and wireless sensor network.