Designa Coupled Line Microstrip Bandpass Filter at 1.8 GHz

In this paper, we will present a complete band pass filter design by using a microstrip coupled line, that is done by using ADS software to perform the simulation process, and then printed the filter designed by regular circuits printing method (PCB), using FR4 material at 1.8GHz center frequency, 1.85GHz upper cutoff frequency, and lower cutoff frequency at 1.75GHz, noting that the 1.8GHz frequency is included in the L band range that is being used for LTE application. To identify the filter properties which is conducted by measuring the s parameter, namely insertion loss and return loss. Finally, the comparison between the results of simulation and the measured results were accepted.