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What kind of itterations was done here

  1. Jun 1, 2017 #1
    Hello , in the attached photo there is a an examle in which we want a 20dB coupling with 1dB ripple, so Cmax is -19 and Cmin is -21.
    in the marked table in red they do a "trial and error"' itterations

    what kind of itterations?, why they pick each time a different C_max?
    C max is -19 dB which is 0.112202
    C max and Cmin are given to us from the question

    Thanks
    sMJkNOV.jpg
     
  2. jcsd
  3. Jun 2, 2017 #2
    ok they pick combinations of C1 and C2 , for what purpose?

    in the solution they say
    that at minimum point:

    theta=pi/2
    C_min=-21dB=0.089125
    C=C_1*sin(3/2*pi)+(C_2-C_1)sin(pi/2)=-C_1+C_2-C_1=C_2-2*C_1

    eq1.
    0.089125=C_2-2*C_1

    C_max=-19dB=0.1122


    there are lots of combinations for C_1 and C_2 to match eq1. how do i test a combination to see that it fits?
    what is the addional criteria for C1 and C2 to fit?
    Thanks
     
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