In this work, 4 element Quad Koch fractal dipole (QKFD) on Yagi-Uda was designed and simulated using 4NEC2 software. First iteration of Quad Koch fractal on Yagi-Uda for radar application with 0.042λ at the feeder is considered. The presented antenna exhibits resonance at 2.9 and 7.4 GHz and demonstrated 67 dBi gain at 2.9 GHz having Return loss is (−20;99dB) < −10. The parameters such as VSWR, 511, HPBW and Fr/B ratio are studied. And we noticed that the maximum radiation pattern is along the reflector side. The Proposed antenna can be used for a radar, Ariel communication, wireless communication and industrial manufactures uses designed frequency.