shortwaves
Long-distance radio signals
Shortwaves are radio waves with frequencies between about 3 and 30 megahertz, capable of traveling long distances by bouncing off the ionosphere.
Before satellite communication, shortwave radio was the primary means of international broadcasting: We listened to the BBC on shortwave.
The term also refers to the radios that receive these frequencies: He collected vintage shortwaves.
Two-letter chemical abbreviation
- megahertzOne million oscillations per second
- kilohertzThousand-cycle frequency unit
- spectrumContinuous range of values
- bandwidthData transmission capacity
amplitude · modulation · waveform · harmonic · interference · oscillation · resonance · cycle
Broadcast signal receiver
- transmitterSignal-emitting device
- receiverOne who accepts transmission
- tuningAdjusting pitch accuracy
- broadcastTransmitted media signal
ham · amateur · transceiver · ionosphere · propagation · skip · CW · Morse
Involving electric and magnetic fields
- radiationEnergy propagation through space
- propagationAct of spreading widely
- ionosphereCharged upper atmospheric layer
- reflectionReturned light or thought
refraction · atmosphere · skywave · absorption · fading · sunspot · solar · geomagnetic
HF
Two-letter chemical abbreviation
- megahertzOne million oscillations per second
- kilohertzThousand-cycle frequency unit
- spectrumContinuous range of values
bandwidth · amplitude · modulation · waveform · harmonic · interference · oscillation · resonance · cycle · polarization
antenna
Broadcast signal receiver
- transmitterSignal-emitting device
- receiverOne who accepts transmission
- tuningAdjusting pitch accuracy
broadcast · ham · amateur · transceiver · ionosphere · propagation · skip · CW · Morse · waveband
electromagnetic
Involving electric and magnetic fields
- radiationEnergy propagation through space
- propagationAct of spreading widely
- ionosphereCharged upper atmospheric layer
reflection · refraction · atmosphere · skywave · absorption · fading · sunspot · solar · geomagnetic
shortwaveslong waves
Extended ocean swells
low frequency · VLF · microwaves · VHF · UHF
shortwavesFM
Carrier wave frequency variation
FM radio · AM · AM radio · satellite radio · digital radio
- shortwave radioReceiver for distant transmissions