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A novel miniature planar monopole antenna with multiband operation for penta-band Wireless Wide Area Network (WWAN) applications is presented. The antenna fabricated on a ceramic substrate consists of a tuning strip and two distinct pairs of driven and coupled strips, and occupies a compact size of only 83(L)×6(W)×0.8(H) mm3 to be easily embedded inside the laptop computer as an internal antenna. By properly designing the antenna operated as a shorted monopole, two wide bands at about 820–985 and 1700–2180 MHz suitable for GSM850/900 and DCS/PCS/UMTS operations can be achieved. Omnidirectional radiation patterns with appreciable gain over the penta-band are obtained so that the proposed antenna is well suited to be embedded inside the laptop computer for WWAN applications.
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Liu et al. (2010) studied this question.
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