RF PIN Diodes Triggered Frequecny Reconfigurable Multiband (UMTS/Bluetooth/WiMAX) Antenna for Applications in Wireless system

This research article presents applications for three wireless bands: Universal Mobile Telecommunication System (UMTS: 1920MHz-2170MHz), Bluetooth (2.402GHz-2.480GHz) and WiMAX (3.30GHz-3.80GHz) wireless system. Proposed antenna contains three quarter-wavelength stub printed on one surface for above said three applications and rectangular ground plane on opposite side. FR4 microwave substrate is used for design and analysis purpose and also the application bands are reconfigured by using three PIN diodes. Desired radiation patterns are obtained in expected principal planes of antenna. Also gain of the antenna remains almost constant in operating bands and maximum gain of 89%.