Question

Consider an air filled rectangular waveguide with dimensions a =1 cm and b = 0.7 cm. At 20 ghz operating frequency,it is operating in dominant te mode. The value of wave impedance

Answer 1

Answer:

The cutoff frequency of an electromagnetic waveguide is the lowest frequency for which a mode will propagate in it. In fiber optics, it is more common to consider the cutoff wavelength, the maximum wavelength that will propagate in an optical fiber or waveguide.A rectangular waveguide supports TM and TE modes but not TEM waves because we cannot define a unique voltage since there is only one conductor in a rectangular waveguide. The shape of a rectangular waveguide is as shown below. A material with permittivity e and permeability m fills the inside of the conductor.