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Radio Waves
Physics Presentation | Group 1 | Class 11-6 | SMK-SMAK Bogor
Sarah Maulina
Siti Safira Nur
Syiva Nooraini
Wihda Nooraini
Yudhistira Bayu Pratama
RADIO WAVES
Radio wave is form when electricity object
from the carrier wave has the combination of
electric field and magnetic field that vibrated
and propagated through the space and bring
the energy (electromagnetic radiation)and the
electricity object modulated with the audio
wave in the frequency radio wave at the
spectrum electromagnetic.
Frequency and
wavelength
Frequency (Hz)
104 – 108
Wavelength (m)
10-2 - 103
FREQUENCY LENGTH SPESIFIC WAVELENGTH APPLICATIONS
Low ( LF )
30-300 kHz
Long Wave
1.500 m
Long wave radio and long
distance communication
Medium ( MF )
300 kHz-3MHz
Medium Wave
300 m
AM Radio
High ( HF )
3 MHz-30 MHz
Short Wave
30 m
Short wave radio and
communication, amateur
radio
Very High ( VHF )
30-300 MHz
Very Short Wave
3 m
FM Radio, police, and
emergency service
Ultra High ( UHF)
300 MHz-3 GHz
Ultra Short Wave
30 cm
Television
Super High (SHF)
> 3 GHz
Microwave
3 cm
Radar, satellite
communication, telephone,
and TV channel
Classification of Radio Waves
Radio Waves SMAKBO
Microphone converts sound
waves into electrical signal
This signal is
combined with the
other signals which
is quickly vibrating
This combined signals
are converted into radio
waves and then emitted
through antenna
Spread through the air and
captured by the receiver
Tuner circuit filter
the radio waves
Electrical signal is converted
into sound waves
HOW RADIO WAVES ARE PRODUCED
Naturally occurring radio waves are made by lightning, or by
astronomical objects. Artificially generated radio waves are used
for fixed and mobile radio communication, broadcasting, radar
and other navigation systems, communications satellites,
computer networks and innumerable other applications.
 Amplitude Modulation
Reflected by the ionosphere
so it has a wide range.
Frequency (300 kHz – 3 MHz)
and the Wavelength is 300
m. The one who modulated
is the amplitude.
 Frequency Modulation
Not reflected by the ionosphere so it
has a narrow range. Frequency (30 –
300 MHz) and the Wavelength is 3 m.
the one who modulated is frequency.
James Clerk Maxwell
1831 - 1879
FOUNDER OF
David E. Hughes
FOUNDER OF
Heinrich Rudolf Hertz
1857-1894
FOUNDER OF
Edward Howard Armstrong
1890-1954
FOUNDER OF
Applications
1. FM Radio
2. AM Radio
3. Handy Talky
4. Radar
5. Telephone
6. Television
7. Satellite
Satellite
A satellite works by receiving
radio signals sent from the Earth
and resending the radio signals
back down to the Earth. In a
simple system, a signal is
reflected, or "bounced," off the
satellite. For example, it is
possible to bounce a signal off
the surface of the Moon back
down to Earth.
Radio waves are electromagnetic waves
which one has the longest wavelength
and the lowest frequency. It’s formed
when electrically charged object of wave
oscillator (carrier wave) modulated by
the audio waves with a lower frequency
of the radio signal. Usually used in
communications.
Source
• http://www.ekoratnoprihantoroindonesia.blogspot.com/2009/
06/perbedaan-gelombang-fm-dan-am.html
• http://aisyahipalima.blogspot.com/2011/08/tugas-fisika-
gelombang-elektromagnetik.html
• http://kelompokkami.wordpress.com/handy-talky/
• http://www.darvill.clara.net/emag/emagradio.htm
• http://www.agusbaha07.blogspot.com/2012/10/sejarahpenem
u-dan-perkembangan-radio.html
• http://en.wikipedia.org/wiki/Electromagnetic_spectrum
• http://jadiberita.com/42710/siapakah-sebenarnya-penemu-
radio/
• http://wawan.guru.sman1-slo.sch.id/2012/09/05/gelombang-
radio/

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Radio Waves SMAKBO

  • 1. Radio Waves Physics Presentation | Group 1 | Class 11-6 | SMK-SMAK Bogor Sarah Maulina Siti Safira Nur Syiva Nooraini Wihda Nooraini Yudhistira Bayu Pratama
  • 2. RADIO WAVES Radio wave is form when electricity object from the carrier wave has the combination of electric field and magnetic field that vibrated and propagated through the space and bring the energy (electromagnetic radiation)and the electricity object modulated with the audio wave in the frequency radio wave at the spectrum electromagnetic.
  • 3. Frequency and wavelength Frequency (Hz) 104 – 108 Wavelength (m) 10-2 - 103
  • 4. FREQUENCY LENGTH SPESIFIC WAVELENGTH APPLICATIONS Low ( LF ) 30-300 kHz Long Wave 1.500 m Long wave radio and long distance communication Medium ( MF ) 300 kHz-3MHz Medium Wave 300 m AM Radio High ( HF ) 3 MHz-30 MHz Short Wave 30 m Short wave radio and communication, amateur radio Very High ( VHF ) 30-300 MHz Very Short Wave 3 m FM Radio, police, and emergency service Ultra High ( UHF) 300 MHz-3 GHz Ultra Short Wave 30 cm Television Super High (SHF) > 3 GHz Microwave 3 cm Radar, satellite communication, telephone, and TV channel Classification of Radio Waves
  • 6. Microphone converts sound waves into electrical signal This signal is combined with the other signals which is quickly vibrating This combined signals are converted into radio waves and then emitted through antenna Spread through the air and captured by the receiver Tuner circuit filter the radio waves Electrical signal is converted into sound waves HOW RADIO WAVES ARE PRODUCED
  • 7. Naturally occurring radio waves are made by lightning, or by astronomical objects. Artificially generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, communications satellites, computer networks and innumerable other applications.
  • 8.  Amplitude Modulation Reflected by the ionosphere so it has a wide range. Frequency (300 kHz – 3 MHz) and the Wavelength is 300 m. The one who modulated is the amplitude.  Frequency Modulation Not reflected by the ionosphere so it has a narrow range. Frequency (30 – 300 MHz) and the Wavelength is 3 m. the one who modulated is frequency.
  • 9. James Clerk Maxwell 1831 - 1879 FOUNDER OF
  • 13. Applications 1. FM Radio 2. AM Radio 3. Handy Talky 4. Radar 5. Telephone 6. Television 7. Satellite
  • 14. Satellite A satellite works by receiving radio signals sent from the Earth and resending the radio signals back down to the Earth. In a simple system, a signal is reflected, or "bounced," off the satellite. For example, it is possible to bounce a signal off the surface of the Moon back down to Earth.
  • 15. Radio waves are electromagnetic waves which one has the longest wavelength and the lowest frequency. It’s formed when electrically charged object of wave oscillator (carrier wave) modulated by the audio waves with a lower frequency of the radio signal. Usually used in communications.
  • 16. Source • http://www.ekoratnoprihantoroindonesia.blogspot.com/2009/ 06/perbedaan-gelombang-fm-dan-am.html • http://aisyahipalima.blogspot.com/2011/08/tugas-fisika- gelombang-elektromagnetik.html • http://kelompokkami.wordpress.com/handy-talky/ • http://www.darvill.clara.net/emag/emagradio.htm • http://www.agusbaha07.blogspot.com/2012/10/sejarahpenem u-dan-perkembangan-radio.html • http://en.wikipedia.org/wiki/Electromagnetic_spectrum • http://jadiberita.com/42710/siapakah-sebenarnya-penemu- radio/ • http://wawan.guru.sman1-slo.sch.id/2012/09/05/gelombang- radio/