Abstract
This project contains basic information, design, 3D projection, simulation, and analysis of Microstrip Bandpass Filter. The filter was composed of the feed lines connected to the two ports with the parallel coupled lines between them. The separation between these elements is reduced to the minimum for the purpose of reducing the error. Ultimately, the microstrip bandpass filter was designed with a 400 MHz bandwidth. We end up with these result: at the 4.43 GHz, S11 parameter is -9.868 dB and S22 is -1.808 dB, while at the 4.83 GHz, S11 is -9.995 dB and S22 is -1.826 dB.
Highlights
The filters can be considered as one of the crucial parts of the microwave system and any communication system
There are several ways for reducing the size of the filter, for example, it can be realized from dielectric substrates with big magnitudes of dielectric constant, but since this is the microstrip filter design, preferred method should be changing the geometry of the filter, because the big dielectric constant material will cause further losses [3]
The proposed design of the microstrip bandpass is fabricated on FR-4 material with relative permittivity εr = 4.4 and the thickness h = 1.55 mm, while the characteristic impedance is chosen as Z0 = 50Ω
Summary
The filters can be considered as one of the crucial parts of the microwave system and any communication system. The important roles in designing the bandpass filter are determining the maximal loss inside the pass domain, the minimal attenuation in the reject/stop domains and ensuring that the filter characteristics are like in transition domains [2] Designing these filters is accomplished by using one or more resonators, coupled to each other. These resonator parts can be represented as physical components that store electric and magnetic energy in a frequency - dependent way. These filters are widely used in many communication systems such as satellite, mobile and radar. There are several ways for reducing the size of the filter, for example, it can be realized from dielectric substrates with big magnitudes of dielectric constant, but since this is the microstrip filter design, preferred method should be changing the geometry of the filter, because the big dielectric constant material will cause further losses [3]
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