This article presents a compact microstrip-fed monopole antenna for application in WLAN (2.4-2.484 GHz) and UWB (3.1-10.6 GHz) bands. The radiating element of the proposed antenna consists of two arms that resonate at the fundamental frequencies of 2.45 and 3.5 GHz. A narrow slot is purposely embedded in the ground plane under the microstrip feed line to improve the impedance matching for the higher-order modes of the two radiating arms for achieving an ultra-wide-band response. A prototype of the designed antenna is fabricated and measured, and satisfactory radiation properties were observed. The measured 10-dB return-loss bandwidth (maximum peak gain) of the 2.4-GHz WLAN band is 0.17 GHz (4 dB), and that of the UWB band is 7.65 GHz (8.7 dB). In addition, a small group-delay variation of less than 1 ns was observed in the UWB.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering