Abstract
Fractal is a geometrical shape that is built by simple repeating instructions. One of fractal geometry is Cohen-Minkowski. This paper discussed the implementation of the Cohen-Minkowski fractal of first and second iterations of mikrostrip dipole antenna. The antenna is designed by using FR4 substrate with dielectric constant of 4.4 and 1.6 mm thickness. The design parameters include voltage standing wave ratio (VSWR), return loss, radiation pattern and gain obtained from simulation of AWR design environment. Simulation and optimization showed that optimal design is successfully achieved. The minimum VSWR is 1.024 at frequency of 433 MHz and return loss is −38.7 dB. Radiation pattern is omnidirectional with gain of 4.668 dB. Simulations also showed that 40.32% horizontal arm length reduction of the simulated dipole antenna results bandwidth increment of 46.13% at <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{VWSR} < 2$</tex> .
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