Compact Dual-Band Microstrip Antenna for IEEE 802.11a WLAN Application

A compact dual-band rectangular microstrip antenna (RMSA) is realized by two different single-slotted single-band rectangular microstrip antennas with slotted ground plane. Each open-ended slot in the single-slotted antenna is responsible to generate a wide impedance band that is shifted to lower frequencies by the effect of the ground slot. The length and position of each open-ended slot is varied to operate the antenna in a suitable resonant band (5.15–5.35 and 5.725–5.825 GHz). The proposed antenna meets the required impedance bandwidth, necessary for dual-band IEEE 802.11a WLAN application (5.125–5.395 and 5.725–5.985 GHz). The dimension of the antenna (12
$\,\times\,$
8
$\,\times\,$
1.5875 mm
$^{3}$
) shows an average compactness of about 53.73% with respect to a conventional unslotted rectangular microstrip patch antenna.