Amplifiers

Wavelength and Frequency
Wavelength and Frequency
Frequency Band Designations
Previous
Frequency P L S C X Ku K Ka
Designations
Current
Frequency C D E F G H I J K
Designations
0.5 1.0 2.0 3.0 4.0 6.0 8.0 10.0 12.4 18.0 20.0 26.5 40.0
FREQUENCY (GHz)
Wavelength and Frequency
For all forms of wave, the velocity, wavelength, and frequency are related such that
λ = wavelength in meters (m)
F = frequency in hertz (Hz)
ε r = relative dielectric constant of propagation medium
c = velocity of light (300,000,000 m/s)
µ r = relative permeability of propagation medium
The dielectric (ε) is a property of the medium in which the wave propagates.The value of ε is defined as 1.000 for a perfect
vacuum, and very nearly 1.0 for dry air (typically 1.006). In most practical applications, the value of ε in dry air is taken to be
1.000. For mediums other than air or vacuum, however, the velocity of propagation is slower, and the value of ε relative to a
vacuum is higher.Teflon ® , for example, can be made with dielectric constant values (ε) from about 2 to 11.
Frequency vs.Wavelength
Frequency
Wavelength
1 MHz 300 meters (m)
10 MHz 30 m
100 MHz 3 m
300 MHz 1 m—100 centimeters (cm)
1 GHz 30 cm
10 GHz 3 cm
100 GHz 3 millimeters (mm)
300 GHz 1 mm—10 -3 m
3 x 10 14 1 micron—10 -6 m
84