q if b and a are the radii of the outer and inner


Q. If b and a are the radii of the outer and inner conductors, respectively, of a coaxial cable using a polyethylene dielectric (εr = 2.26), what ratio b/a is needed for the cable to have a characteristic impedance ¯ Z0 = R0 = (60/√εr ) ln (b/a) of 50?

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Electrical Engineering: q if b and a are the radii of the outer and inner
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