Tsung-Wen Chiu

An embedded tri-band planar inverted-F antenna with a branch-line shorting strip

By using a branch-line shorting strip, a novel planar inverted-F antenna (PIFA) suitable for the application as a GSM/DCS/PCS tri-band mobile phone internal antenna has been obtained. The proposed antenna has three resonant elements, two shorter radiating strips of slightly different lengths and one longer radiating strip, which are fabricated via stamping process and supported by a plastic holder. These three resonant elements share the branch-line shorting strip and generate three resonant modes, one on lower band from the first-order mode of the longer radiating strip for the EGSM (880-960 MHz) operation and two on upper band which is generated by the two shorter radiation strips, leading to a wide bandwidth covering the DCS (1710-1880 MHz) and PCS (1850-1990 MHz) bands. The proposed antenna has also a good radiation performance as the radiation efficiency more than 50%. Details of the antenna design and experimental results are presented and discussed

Planar Antennas for GSM/Wi-Fi Dual-Mode Mobile Phone Application

Recently, planar antennas have been widely applied in mobile phones as internal antennas due to the attractive features of low profile and small size [1, 2], such as the PIFAs (Planar Inverted-F Antennas) or patch antennas. Beside GSM system, there are many wireless applications integrated in portable mobile phone, such as Wi-Fi, bluetooth and GPS. In these cases, the antennas not only provide wide bandwidth to cover the operating bands, but also need to be integrated with other antennas with high isolation.

An embedded dual band antenna for folded type M-phone

An embedded novel planar inverted-F antenna with a notch ground plane has good impedance bandwidth for folded type mobile phone application is proposed. The proposed antenna patch is composed of radiator, frequency ratio tuner and a matching bridge, respectively. The radiator is located in top side of M-phone (no ground in this area). The proposed antenna, 7 mm in height, 30 mm in width and obtained bandwidth cover the EGSM (880-960 MHz) and DCS (1710-1880 MHz) bands. The loss between conducted power and TRP/TIS tested in working phone is less than 3 dB