Microstrip paralleled coupled lines band-pass filters; analyses, design and sensitivity

In the present work, the quasi-static spectral domain approach (SDA) is used for the analysis of the coupled suspended microstrip line with tuning septums and the broadside-coupled microstrip lines. The analysis and design of the microstrip half-wavelength coupled line band pass filter is also presented. The sensitivity of the filter response to the resonator structure parameters is considered. The obtained results are compared with the available published data and good agreement is found.