Modified wideband planar inverted-F antenna with double shorting stubs for portable devices

This paper presents a simple low profile modified form of PIFA with two shorting stubs. Two shorting plates and a slot on the top radiating plate are used to do impedance matching for enhancing the impedance bandwidth of the antenna. This modified planar inverted-F antenna covers the frequency band from 1650 MHz to around 2600 MHz in a single band which covers most of the frequency bands used in mobile handset applications including LTE/AWS (1700), DCS (1800), LTE (1900), PCS (1900), UMTS/IMT (2000), LTE/AWS (2100), WLAN/Bluetooth (2450) and LTE/WiMAX (2600). Simulated results are compared with measured results to validate the conclusion.