A multi-band internal antenna for all commercial mobile communication bands and 802.11a/b/g/n WLAN.

An internal antenna for mobile phones with small volume is proposed. The proposed antenna is based on a planar inverted F-antenna (PIFA) with a coupled feeding structure. The proposed antenna realized on a printed circuit board to reduce fabrication costs. The coupled feeding structure helps the antenna have broadband characteristic which includes all commercial service bands, GSM850 / GSM900 / GPS / GSM1800 / GSM1900 / WCDMA2100 / 802.11b/g / LTE2600 (824–2690 MHz) as well as 802.11a/n (5150–5825 MHz). The antenna gain is in the range of −0.1–3.5 dBi over 824–2690 MHz and 2.3–2.8 dBi over 5150–5825 MHz. And the antenna efficiency is in the range of 615150–93 % over 8245150–2690 MHz and 695150–81 % over 51505150–5825 MHz. In addition, the effect of SAM head phantom is tested using a simulation. As a result, it was verified that the performance does not change significantly. The total size including system circuit area and no-ground area is 100 5150× 40 × 0.8 mm3. The SAR results for the proposed antenna are presented as proper values. As a result, the designed antenna is suitable for small mobile devices and slim wireless applications. [ABSTRACT FROM PUBLISHER]