Federal Aviation Agency.
American National Standard Institute.
Federal Communications Commission (FCC).
Institute of Electrical & Electronics Engineers, Inc.
Frequency modulation (FM) and independent sidebands (ISB).
Continuous wave (CW) and amplitude modulation (AM).
Single side band (SSB) and FM.
SSB and ISB.
Low frequency (LF)
Medium frequency (MF).
High frequency (HF).
Very high frequency (VHF).
Very low-resistance dielectric
Very high-resistance dielectric.
Flexible coaxial cable.
Rigid coaxial cable.
When the frequencies are so high that their wavelength is miniscule.
to transmit on frequencies too low for ground propagation.
for high power at frequencies up to 30 megahertz (MHz) primarily.
To receive television frequencies over the air.
Their outer surface will arc from being very slightly damaged.
Their conductive material construction is easily dented.
Their effectiveness is hindered by moisture.
They can be destroyed by corrosion.
Inductance and resistance.
Inductance and capacitance
Resistance and capacitance.
Length and type of shielding.
Wavelength is inversely related to frequency.
Wavelength is directly related to frequency.
Wavelength is determined by the line length.
Wavelength is expressed in lambdas (λ).
No reflected waves
Maximum voltage across its open termination.
Maximum voltage across its shorted termination.
Resonant lines are often referred to as flat lines
Maximum power transfer results from a resonant line
Maximum power transfer results from a nonresonant line
Significant loss and damage to equipment results from using a nonresonant line.
Signal loss would be negligible.
Signal loss would be significant.
Current would be maximum at the termination.
Voltage would be minimum at the termination
Long distances with few interruptions.
From point to point along the Earth’s surface.
No more than 20 miles to the receive antenna
Through the air in a straight line from transmitter to receiver
Atmospheric conditions at the time of transmission.
Air and moisture content in the propagation path.
Soil and water in the propagation path.
soil and air in the propagation path
Atmospheric pressure, and temperature.
atmospheric pressure, and frequency.
Receive signal level, and temperature
Receive signal level, and frequency.
Here's an interesting quiz for you.