Designing Microstrip Low-Pass Filter with Cutoff Frequency 3GHz

Abstract: The aliasing phenomenon became a problem in communication systems when an input signal includes high frequency components. These higher frequencies can fold on the lower frequency spectrum and appear as erroneous signals that cannot be distinguished from valid sampled data. Therefore, will design low-pass filter with cut-off frequency 3GHz using Microstrip technique which will work to remove and reject these high frequencies, in addition to microstrip technique, would be design lowpass filter using lumped elements to make comparison between them. There are two methods which can used to design Microwave Filters, the first method is Image parameters and the second is Insertion Loss method. These methods will explain. RF and microwave filters may be designed as lumped element or distributed element circuits; they may be realized in various transmission line structures, such as waveguide, coaxial line, and microstrip. In practice, high-performance microwave filters with minimized size and weight are playing an important role for design and fabrication of high-efficiency miniaturized microwave systems. Software simulation is done by using Microwave Office V.6.4 software, Graphs, and Electronics circuits will be presented