The design of maximally flat band pass filter for 10 GHz center frequency with 500 MHz bandwidth for X band applications is presented in this paper. An analytical approach is discussed here along with design using EDA tool. The simulated and measured values of various parameters such as insertion loss − 1.3 dB, return loss − 22.65 dB, group delay 1.35 nS and VSWR 1.16 are compared. The measured values insertion loss − 1.3 dB, return loss − 22.65 dB, group delay 1.35 nS and VSWR 1.16 offers a very good filter response. It gives slight compromising results. The physical dimensions of the micro strip filter structure are tuned manually for better result after the analytical calculations of the dimensions. It gives clear picture that the length of the micro strip lines has major role in shifting the pass band, width and space between the lines plays a conformal contribution in varying the bandwidth, attenuation levels. The filter is matched to 50 Ω micro strip lines at both ends.