Direction of •= Constructive interference constructive interference Figure 24.26 An overhead view of two radio broadcast antennas sending the same signal, and the interference pattern they produce. ------

Direction of •= Constructive interference constructive interference Figure 24.26 An overhead view of two radio broadcast antennas sending the same signal, and the interference pattern they produce. ------

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Concept explainers

Frequency Modulation

Frequency modulation is a method or process of encoding the data of a specific signal (analog or digital) by modulating the carrier wave frequency according to the frequency of the modulated signal. Modulated signals are nothing more than information or data that should be conveyed after being converted into electronic signals.

Question

Figure 24.26 shows the interference pattern of two radio antennas broadcasting the same signal. Explain how this is analogous to the interference pattern for sound produced by two speakers. Could this be used to make a directional antenna system that broadcasts preferentially in certain directions? Explain.

Direction of
•= Constructive
interference
constructive
interference
Figure 24.26 An overhead view of two radio broadcast
antennas sending the same signal, and the interference
pattern they produce.
------

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Could this be used to make a directional antenna system that broadcasts preferentially in certain directions? Explain.

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