Question 3.3: HIGHER ORDER MODE OF A COAXIAL LINE Consider a RG-401U semir...

Microwave Engineering

HIGHER ORDER MODE OF A COAXIAL LINE

Consider a RG-401U semirigid coaxial cable, with inner and outer conductor diameters of 0.0645 in. and 0.215 in., and a Teflon dielectric with $\ \epsilon_{r}= 2.2.$ What is the highest usable frequency before the $\ TE_{11}$ waveguide mode starts to propagate?

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