A Novel Circular Disc Monopole Antenna for Dual-Band WLAN Applications
Keywords:
Dual-band, H-shaped ground plane, monopole antenna, WLANAbstract
This paper presents a novel and simple circular disc monopole antenna with a tunable Hshaped ground plane which provides two separate resonant modes to achieve 2.4- and 5.5-GHz dualband operation for wireless local area network (WLAN) applications. The proposed antenna is printed on a low cost substrate FR4 (?r=4.4) and excited using a 50 ? microstrip transmission line. Lower resonant mode of the antenna has an impedance bandwidth (|S11|<-10 dB) of 700 MHz (2250-2950 MHz), and the upper resonant mode has a bandwidth of 1100 MHz (4900-6000 MHz). For validation purposes, an antenna prototype was fabricated and tested. The measured and simulated results show relatively good agreement and confirm satisfactory radiation characteristics. Effects of varying the widths of the arms of the Hshaped ground plane on antenna performance have also been studied.
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References
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