Abstract
A rectangular mushroom-like superstrate structure is proposed to design an antenna for dual-band wireless local area network (WLAN) applications. The proposed antenna consists of an array of mushroom-like rectangular patches and a planar slot antenna. Based on the dispersion diagram analysis, the proposed antenna can operate in two bands: The lower band is from 2.3 to 2.98 GHz, with -10-dB bandwidth of 25.8%, which is corresponding to zeroth-order resonant (ZOR) mode, and the upper band is from 5.02 to 5.84 GHz, with -10-dB bandwidth of 15.1% and average realized gain of 6.9 dB at boresight. The proposed antenna is feasible to cover the specification for dual-band WLAN applications in the 2.4-GHz (2400-2484 MHz) and 5-GHz (5150-5825 MHz) bands. Furthermore, the proposed antenna has a low profile of 4.2 mm and compact size of 33 ×30 mm 2 , which is suitable for installation in wireless handheld devices. The simulated and measured results are in good agreement to verify the good performance of the proposed antenna.
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