The audio power of human voice is concentrated at about 300Hz. Antennas of the appropriate size for this frequency are impractically large, so that to send voice by radio the voice signal must be used to modulate a higher frequency (carrier) for which the natural antenna size is smaller. a. What is the length of an antenna one-half wavelength long for sending radio at 300 Hz? b. An alternative is to use a modulation scheme, so that the bandwidth of the signal is a narrow band centered on the carrier frequency. Suppose we use a half-wave antenna to have a length of 1 m. What carrier frequency would you use?

The audio power of human voice is concentrated at about 300Hz. Antennas of the appropriate size for this frequency are impractically large, so that to send voice by radio the voice signal must be used to modulate a higher frequency (carrier) for which the natural antenna size is smaller. a. What is the length of an antenna one-half wavelength long for sending radio at 300 Hz? b. An alternative is to use a modulation scheme, so that the bandwidth of the signal is a narrow band centered on the carrier frequency. Suppose we use a half-wave antenna to have a length of 1 m. What carrier frequency would you use?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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