Chapter 14: Waveguide and Antenna Fundamentals

Quiz

1. A parallel-plate guide has a height of 1 cm, and it is filled with material whose dielectric constant is . Find the highest frequency  up to which single-mode TEM-wave operation is possible.

, GHz

, MHz

, GHz

, GHz



2. A rectangular hollow waveguide has a cross-section of () mm. What is the frequency range within which a single mode (the dominant TE10 mode) exists?

, GHz

, GHz

, GHz

, GHz



3. In Problem #2, calculate the wavelength of the TE10 mode, , at  GHz, if the mode propagates.

 cm

 cm

the TE10 mode does not propagate

 cm



4. A slab of glass ( ) has thickness . It is surrounded by air ( ). What is the shortest (free-space) wavelength  at which single-mode operation can be ensured?



5. In the far (radiation) zone, the field intensity (E or H) radiated by an antenna depends on the distance r from the antenna as:



6. In the far (radiation) zone, the average power density radiated by an antenna depends on the distance r from the antenna as: