2. (Application) Suppose KDVS, the campus radio station, were to transmit from t

Question

2. (Application) Suppose KDVS, the campus radio station, were to transmit from two antennas set /4 apart (see figure). Also, suppose there is a constant phase difference associated with the waves coming from each antenna such that each maximum from antenna A is emitted a time T/4 earlier than those of antenna B (the words an electrical engineer might use for this are "the signal from A is /2 ahead of the signal from antenna B). source source w a) For each of the four principal compass points of north (N), south (S), west (W), and east (E), determined whether the signals from the two antennae interfere: constructively; destructively; or partially. Justify your answers using a phase chart and a sketch of one or two circular wavefronts from each source Why might KDVS decide to transmit its signal in this manner, instead of from just one antenna? Where would KDVS locate its transmitters if it "phased them" like this (e.g., northern Davis)? b)

Explanation / Answer

a) North: Destructively

South: Destructively

West: Partially

East: Partially

b) It might not want to transmit its signal in north and south direction

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