How much does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?
How can linearly polarized Yagi antennas be used to produce circular polarization?
Where should a high Q loading coil be placed to minimize losses in a shortened vertical antenna?
Why should an HF mobile antenna loading coil have a high ratio of reactance to resistance?
What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
What happens to the SWR bandwidth when one or more loading coils are used to resonate an electrically short antenna?
What is an advantage of using top loading in a shortened HF vertical antenna?
What happens as the Q of an antenna increases?
What is the function of a loading coil used as part of an HF mobile antenna?
What happens to feed-point impedance at the base of a fixed length HF mobile antenna when operated below its resonant frequency?
Which of the following conductors would be best for minimizing losses in a station's RF ground system?
Which of the following would provide the best RF ground for your station?