“…Today, a single communicating device is expected to be capable of operating in multiple frequency bands based on applications such as WLAN, GPS, Bluetooth, WiMax, cellular mobile communication, and so on. To achieve compactness in the design of all components and circuits, considerable research has been conducted and is ongoing [1]. Furthermore, from an antenna design perspective, a single antenna with compact size has to operate in multiple frequency bands, which remains a challenging task.…”