Across
- 4. relative permittivity of the ionosphere at radio frequency is ____ than unity
- 5. tangential electric field for the perfect conductor is
- 6. ground wave propagation is useful for ______ communication
- 7. frequencies used in scatter transmission
- 9. frequencies used in tropospheric scattering
- 10. propagation in VHF band is by
- 12. the phenomenon of microwave signals follow the curvature of earth is called
- 13. D-layer disappears at ______
- 14. absorption of electromagnetic waves by the atmosphere depends on
Down
- 1. MUF and skip distance occur in which type of propagation
- 2. wave remains unaffected during day and night
- 3. when wave passes from air into ionosphere
- 4. propagation used in television broadcasting
- 8. which layer does not exist during day time
- 11. when an electromagnetic wave is moving in free space, it suffers from _____