It is often desirable to radiate most of the energy from a radio transmitter in particular directions rather than uniformly in all directions. Pairs or rows of antennas are often used to produce the desired radiation pattern. As an example, consider two identical vertical antennas 400 m apart, operating at 1500 kHz = 1.5 * 106 Hz (near the top end of the AM broadcast band) and oscillating in phase. At distances much greater than 400 m, in what directions is the intensity from the two antennas greatest?
It is often desirable to radiate most of the energy from a radio transmitter in particular directions rather than uniformly in all directions. Pairs or rows of antennas are often used to produce the desired radiation pattern. As an example, consider two identical vertical antennas 400 m apart, operating at 1500 kHz = 1.5 * 106 Hz (near the top end of the AM broadcast band) and oscillating in phase. At distances much greater than 400 m, in what directions is the intensity from the two antennas greatest?
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It is often desirable to radiate most of the energy from a radio transmitter
in particular directions rather than uniformly in all directions. Pairs or
rows of antennas are often used to produce the desired radiation pattern.
As an example, consider two identical vertical antennas 400 m apart,
operating at 1500 kHz = 1.5 * 106 Hz (near the top end of the AM
broadcast band) and oscillating in phase. At distances much greater than
400 m, in what directions is the intensity from the two antennas greatest?
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