Design of a Compact Bio-inspired Planar UWB Antenna for Cognitive Radio Applications

This work presents the design of a compact ultra-wideband bio-inspired planar antenna, with a bandwidth starting at 0.76 GHz up to 11 GHz, applicable for cognitive radio technology. The structure was developed in a FR4 substrate of 1.6 mm height and occupying an area of 140 × 133 mm ² . The gain of the proposed antenna is between (2-8.2) dBi and presents 97.2% of maximum radiation efficiency at 1 GHz. The development of the flower-shaped bio-inspired antenna using the Gielis formula is presented.