Radio Propagation Characteristics

Front

What is Radio Frequency (RF)?

Back

RF refers to electromagnetic waves used in a wide range of communications, including radio, television, cordless phones, WLANs, and satellite communications.

Front

What is Radio Frequency (RF)?

Back

RF refers to electromagnetic waves used in a wide range of communications, including radio, television, cordless phones, WLANs, and satellite communications.

Front

What is the basic AC signal in radio communications?

Back

The most basic AC signal is a sine wave, which varies uniformly in voltage over time.

Front

What is the relationship between frequency (f), wavelength (λ), and the speed of light (c)?

Back

The relationship is given by the equation c = λf.

Front

What are the three routes a signal can travel from an antenna?

Back

1. Ground wave 2. Sky wave 3. Line of sight (LOS) propagation.

Front

What is ground wave propagation?

Back

In ground wave propagation, radio waves travel through the lowest portion of the atmosphere, hugging the earth.

Front

What is sky wave propagation?

Back

In sky wave propagation, higher-frequency radio waves radiate upward into the ionosphere and are reflected back to earth.

Front

What is line-of-sight (LOS) propagation?

Back

LOS propagation involves very high-frequency signals transmitted in straight lines directly from antenna to antenna.

Front

What is the difference between LOS and NLOS communication?

Back

LOS communication occurs without obstructions, offering better signal strength, while NLOS communication can occur with obstructions, leading to signal attenuation and reflection.

Front

What are the four main mechanisms of radio propagation?

Back

1. Reflection 2. Absorption 3. Diffraction 4. Scattering.