Microwave stepped-impedance filter design: a comparative study of Chebychev and maximally-flat filters

Authors

  • Agwu, O. E Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture Umudike, Nigeria.
  • Amadi, C. C Department of Computer Engineering, Michael Okpara University of Agriculture, Umudike, Abia state.
  • Enebe, C. C Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture Umudike, Nigeria.

Keywords:

Microwave, Filter, Chebychev, Maximally-Flat, Stepped-Impedance

Abstract

This paper reports microwave stepped-impedance filter design: a comparative study of Chebyshev and maximally-flat filters. First, the MATLAB tool was used to observed both filters High-pass/Low-pass response, Cut-off frequency, Percentage of ripple in the pass-band and the Number of poles as the key parameter indicators and the results obtained compared for both filters. Secondly, by setting the maximum insertion loss at 0.5dB, cut-off frequency at 4GHz, attenuation at 15dB for 6GHz and input/output impedance at 50, the ADS software accompanied with some stipulated data was used for the simulation of the two filters by using the same design specifications for both filters and the results obtained also compared for both filters. By setting the frequency range to sweep through 1.0GHz to 15GHz at 1.0MHz intervals with characteristic impedance of 50Ω the design filter characteristics was observed and simulation results of lumped element filter has been presented. These filters were converted into planar filters, which were also simulated and analysed using ADS software. Finally, a number of iterations of end correction was done in order to compensate for the effect of stray capacitance and inductance.

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Published

2023-03-18

Issue

Vol. 1 No. 1 (2023): MAIDEN EDITION|UNIZIK Journal of Engineering and Applied Sciences

Section

Articles