Dual-frequency triangular planar inverted-F antenna

This paper presents the performance of a single-feed triangular planar inverted-F antenna with a V-shaped slot. Several prototypes of the proposed antennas with different shorting-wall widths are studied experimentally. The obtained results show that, by selecting a proper shorting-wall width, the proposed antenna not only has dual-frequency characteristic but also can achieve the impedance bandwidth of more than 30% in higher operating frequency band. In addition, the radiation pattern across the entire operating bandwidth is measured and discussed.