Folded meandered-patch monopole antenna for triple-band operation

The meandered patch is generally formed by cutting several linear slits in a planar conducting patch to meander the excited patch surface current path. The meandered patches are generally in planar structures. We demonstrate a novel antenna design utilizing a meandered patch folded into a compact three-dimensional structure. The proposed antenna is suitable for applications in mobile phones for GSM (global system for mobile communication, 890-960 MHz), DCS (digital communication system, 1710-1880 MHz) and PCS (personal communication system, 1850-1990 MHz) triple-band operations. In addition, owing to the proposed folding design, the antenna height is greatly reduced (to 8 mm) and can be mounted on top of a grounded substrate with a distance of 7 mm, leading to a low profile of only 16 mm (about 4.2% of the wavelength at 900 MHz) from the ground plane. This characteristic makes it very promising for the proposed antenna to be placed within the mobile phone housing, leading to a concealed mobile phone antenna.