College of Engineering

A master thesis was discussed in Department of Electrical Engineering / College of Engineering / University of Mosul entitled ” Design, Analysis and Simulation of a Microstrip Bandpass Filter For LTE Application ” submitted by postgraduate student (Anas Thamer Mustafa Mohammed) on Sunday, 29/08/2021.In this thesis, a Band-pass filter with a center frequency of (1.8GHz) was designed and implemented, which is the frequency that was adopted in the fourth-generation technology that was launched in Iraq with an upper cut-off frequency (1.85GHz) and a lower cutoff frequency (1.75GHz) and I used the (ADS) program to process simulation The message was divided into two main parts:The first section is the design of the Band-pass filter using the lumped elements of ripple (0.5dB) and (0.1dB), and then the process of converting the designed filter into transmission lines using the parallel-coupled line that is implemented using the microstrip and this is done by a full derivation process for the conversion process. To access the equations used to calculate the even pattern (Z0e) and the odd pattern (Z0o), as well as calculating the tolerance coefficients (Jn) and conducting the measurement process for the coefficients (S), which include insertion loss (S21) and return loss (S11).The second section included the process of implementing the filter designed using FR4 Lossy substrate with a dielectric constant of (4.3) and thickness (1.6 mm) and measurement of (S) parameters.A comparison was made between the simulation results and the practical results of the band-pass filter designed by the ripple (0.5dB) and (0.1dB) parallel-coupled line method. The practical results showed a good agreement with the simulation results, especially at ripple (0.1dB).