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Bandwidth Enhancement of the Small-Size Internal Laptop Computer Antenna Using a Parasitic Open Slot for Penta-Band WWAN Operation

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4 Author(s)
Kin-Lu Wong ; Dept. of Electr. Eng., Nat. Sun Yat-sen Univ., Kaohsiung, Taiwan ; Wei-Ji Chen ; Liang-Che Chou ; Ming-Ren Hsu

By embedding a parasitic open slot in the antenna ground of a small-size internal laptop computer antenna, enhanced bandwidth for the antenna's lower band to cover the GSM850/900 operation (824-960 MHz) can be achieved. The internal laptop computer antenna in this study is a small-size coupled-fed shorted T-monopole, whose length along the top edge of the display ground of the laptop computer is 43 mm only. The antenna can also provide a wide upper band to cover the GSM1800/1900/UMTS operation (1710-2170 MHz). With the inclusion of the parasitic open slot, the total antenna length along the top edge of the display ground is 48 mm only, and the occupied antenna volume is 10 × 3.5 × 48 mm3 above the top edge of the display ground, which is the smallest for the internal penta-band WWAN laptop computer antenna that have been reported for the present. Detailed results of the proposed parasitic open slot on bandwidth enhancement of the internal WWAN laptop computer antenna are presented.

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Antennas and Propagation, IEEE Transactions on  (Volume:58 ,  Issue: 10 )