Wave Attenuation and Absorption Flashcards
1
Q
The electromagnetic energy is absorbed and scattered by the __________.
A
raindrops
2
Q
Because the attenuation is due to the spherical spreading of the wave, it is sometimes __________.
A
Space Attenuation
3
Q
____ causes severe absorption at microwave frequencies.
A
Precipitation
4
Q
Reduction of power
A
Absorption loss
5
Q
Wave attenuation is generally expressed in terms of ________.
A
𝜶 = 𝟏𝟎𝒍𝒐𝒈 𝑷𝑫𝟏/𝑷𝑫𝟐 =𝟏𝟎𝐥𝐨𝐠(𝒓𝟐/𝒓𝟏)^𝟐
6
Q
The reduction in power density due
to non free-space propagation.
A
Absorption
7
Q
The reduction in power density due to inverse square law presumes free-space propagation.
A
wave attenuation
