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
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?
3. In Problem #2, calculate the wavelength of the TE10 mode, , at GHz, if the mode propagates.
cm
the TE10 mode does not propagate
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: