What is the frequency band of shortwave radio transmission?

This question was previously asked in
RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 3)
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  1. 1.7 to 30 GHz
  2. 1.7 to 30 MHz
  3. 1.7 to 30 kHz
  4. 1.7 to 30 Hz

Answer (Detailed Solution Below)

Option 2 : 1.7 to 30 MHz
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Detailed Solution

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  • Shortwave radio refers to radio broadcasts on a portion of the radio spectrum in the frequency range of 1700 - 30000 kHz (1.7 to 30 MHz).
  • Because smaller wavelengths correspond to higher frequencies, shortwave radio received its name because its wavelengths are shorter than the longer wavelengths used in early radio communications.
  • Since the length of the antenna is directly proportional to the wavelength, hence short wavelength means the length of the antenna is also short.
  • For the short wavelength, high range of frequency is required generally in the range of MHz.
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