An internal triple-band planar inverted-F antenna

A novel internal triple-band planar inverted-F antenna (PIFA) for operating at Personal Communication Services/International Mobile Telecommunications (PCS/IMT)-2000/Bluetooth bands is proposed. The proposed antenna can be reduced in size by using a radiating element with thickness and a via hole. A broadband characteristic is obtained by optimizing the thickness of the radiating patch and the offset gap between patch and ground. Dual resonant frequencies are obtained by optimizing the slit lengths and the location of the via hole. The proposed antenna is well suited as an internal antenna due to its small size and wide bandwidth, of about 42%, which covers the PCS (1.75-1.87 GHz), IMT-2000 (1.92-2.17 GHz) and Bluetooth (2.402-2.48 GHz) bands. The design of the proposed antenna and experimental results are discussed.