Explain need of modulation.
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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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Answer: heyy
To reduce the size of antenna or aerial
Explanation:plz mark as brainly
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