Having a project about microwave engineering course

Discussion in 'Homework Help' started by Darknight7, Jan 1, 2013.

  1. Darknight7

    Thread Starter New Member

    May 21, 2012
    Please help us about our project homework;
    Here is the question;

    Design a five section high pass lumped element filter with 1 dB equal-ripple response, a cut-off frequency of 1 GHz and an impedance of 50 Ohms. Plot the amplitude and phase response of the filter. Obtain microstrip realization for a dilecetric material of εr=9 and thickness 0.5 mm.

    What are the whole steps which toolbox should we use matlab sth. please show us the steps and help us to find the solutions ?
  2. bertus


    Apr 5, 2008
  3. Papabravo


    Feb 24, 2006
    What you need for an equal ripple response is a Chebyshev filter. There are tables available that give component values for a lumped element low pass filter with a corner frequency of 1 radian per second. This prototype filter is then scaled up to the frequency of interest.

    You can also transform the prototype low pass filter to a high pass, bandpass, or band stop filter (aka Notch filter).

    All this and more is contained in van Valkenburg,Analog Filter Design
    or online at

    Can't help with Matlab. I use Excel and LTSpice for this stuff.