Electronically Reconfigurable Wlan Band-Notched Mimo Antenna For Ultra-Wideband Applications

A low-profile electronically reconfigurable WLAN band-notched dual port multiple-input multiple -output (MIMO) antenna design for ultra-wideband applications has been presented. Antenna elements exhibit good impedance match (S-11 <=-10 dB) over entire ultra-wideband (3.1 to 10.6 GHz) spectrum. The decoupling structure is used to improve isolation (S-12/S-21) above 20 dB over entire UWB band. Moreover, reconfigurable band-notching is achieved by inserting PIN diodes along the inverted L-shaped slots, in each radiator. Notch at WLAN (5.5 GHz) frequency band is achieved by switching the PIN diode to 'OFF' state. The antenna design is fabricated as well as measured, and the results suggests that the proposed design with switchable WLAN band-notch characteristics is suitable candidate for ultra-wideband applications.