explain any three question
Answers
Explanation:
BAND PASS FILTER:
A band-pass filter or bandpass filter (BPF) is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.
Bandpass filters are widely used in wireless transmitters and receivers. The main function of such a filter in a transmitter is to limit the bandwidth of the output signal to the band allocated for the transmission. This prevents the transmitter from interfering with other stations.
Folded Dipole:
an antenna in the form of an elongated horizontal loop resembling a dipole in appearance with connections at the middle of one or both of the two parallel sides.
Write down one reason for Modulation:
Modulation allows us to send a signal over a bandpass frequency range. If every signal gets its own frequency range, then we can transmit multiple signals simultaneously over a single channel, all using different frequency ranges. Another reason to modulate a signal is to allow the use of a smaller antenna.
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