Abstract
A new type of microstrip bandpass filter is presented with a center frequency operation at 2.5GHz which lies in the S-band frequency range. The filter is designed to be much smaller compared to the same type of parallel-coupled bandpass filter. The simulation results are excellent and the filter is suitable for integration within various microwave subsystems.
Highlights
Bandpass filters are filters containing one or more combination of capacitance and inductance which are designed mathematically to respond to design frequencies while rejecting all other out of band frequencies
Further optimization and tuning of the microstrip circuit would produce an equivalent microstrip circuit with certain percentage of size reduction relatively compared to the parallel-coupled filters
The center frequency is designed to be at 2.5GHz, which describes the operation of the filter with a maximum gain
Summary
Bandpass filters are filters containing one or more combination of capacitance and inductance which are designed mathematically to respond to design frequencies while rejecting all other out of band frequencies. The main goal of the design is printed filter size reduction compared to conventional printed parallel-coupled bandpass filters. The most efficient way in order to obtain a filter with maximum size reduction is by using the microstrip technique in which each filter’s lumped component is realized as microstrip transmission line [1]. Further optimization and tuning of the microstrip circuit would produce an equivalent microstrip circuit with certain percentage of size reduction relatively compared to the parallel-coupled filters.
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