Compact Low-Profile Dual-Port Single Wideband Planar Inverted-F MIMO Antenna

This letter presents a very simple low-profile and compact single-element two-port planar inverted-F antenna (PIFA) with applications in Wireless Local Area Networks (WLAN) and Long Term Evolution (LTE) bands. The two feeding plates are placed perpendicular to each other where polarization diversity is exploited due to the fact that the two ports are cross-polarized. To isolate the two feeding ports, a slot is etched on the ground plane. This single-element PIFA has a height of h=5 mm, which makes it suitable for handheld applications and covers a wide frequency band from around 2.1 to 2.9 GHz for dB, therefore having applications in WLAN (2.45 GHz) and LTE and Worldwide Interoperability for Microwave Access (WiMAX) band (2.5-2.7 GHz), and can be used as a 4G terminal antenna for diversity and multiple-input-multiple-output (MIMO) applications .