A performance study on design and analysis of an extended sierpinski gasket fractal antenna for mm-wave femtocell applications were implemented. The initial analysis includes the design of different stages of basic sierpinski gasket fractal antenna and its performance characteristics like reflection coefficient, gain, and efficiency. The size of the basic equilateral triangle patch is around 5.193mm. The antenna is designed on Arlon Di-clad 880 mm substrate materials with the thickness 0.508mm and dielectric constant 2.2. The proposed antenna efficiently operates at frequencies from 24GHz to 61GHz with reflection coefficient values -10dB to -32dB. The simulated gains in dB values at resonant frequencies are from 02 to 16dB with almost 100% radiation efficiency. Later on, this design was extended and analyzed at different levels concerning various performance metrics. The designed extended sierpinski fractal antenna was radiated with the maximum electric field in a particular direction indicating directional antenna at various feed positions. The study shows that an extended Sierpinski fractal antenna had similar performance with three separately feeding positions. The proposed antenna can work with 5G femtocell applications where Femto base stations need miniaturized antennas for indoor communications.