radiowave
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TRANSCRIPT
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Radio Wave11.2 group 1
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Home
Compiler
Matters
The Inventor
Application
Problem
Conclusion
Reference
Definition
How it Happen
Classification
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Group 1Anshori Suhendro (04)
Aulia Ekayanty (06)Elisabet Siwi (12)
Fauzan Rizqy Kanz (15)
Radio wave
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One of the electromagnetic wave. (doesn’t need medium to propogate) The largest wave length 1 – 1000 meters The smallest frequency ranged between 104 until 107 hertz. The radio wave is mostly used in daily life such as in telecommunication. The examples are handphone, television and radio.
Definition
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How it Happen?
Radio waves created from electric charge that accelerated through the conductor wires. This
charges generated by the electronic circuit called an oscillator.
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According To The Frequency According To Wavelength
According To Modulation System
Classification of Radio Waves
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According To FrequencyFREQUENCY LENGTH Specific Wavelength Applications
Low (LF)
30 kHz – 300 kHz
Long Wave
1500 m
Long wave radio and long distance communication
Medium (MF)
300 kHz – 3 mHz
Medium Wave
300 m
Local medium wave and long distance radio
High (HF)
3 mHz – 30 mHz
Short Wave
30 m
Short wave radio and communication, amateur radio and CB
Very High (VHF)
30 mHz – 300 mHz
Very Short Wave
3m
FM Radio, police, and emergency service
Ultrahigh (UHF)
300 mHz – 3 GHz
Ultra Short Wave
30 cm
TV (line 4, 5)
Super High (SHF)
> 3 GHz
Microwave
3 cm
Radar, satellite communication, telephone, and TV channel
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According To Wavelength
Long wavelength (1500 M)
Medium Wave (300 M)
Short wave (30 M)Very short Waves (3 M)
Ultra short Wave (30 Cm)The microwave (3 Cm)
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According To Modulation System
Amplitude Modulation (AM) An information carrier have a big frequency ,the range is between 550 kHz until 1.600 kHz Can be reflected by the Ionosphere that caused AM has a high reach and used for communication over long distances. But AM is not clear because influenced by weather.
The Frequency Modulation (FM) The frequency ranged is
about 88 kHz until 108 kHz. Can not be reflected by the
Ionosphere that caused FM has a narrow range.
But FM is clear because not influence by the atmosphere (ionosphere).
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The Inventor
The basic theory of the propagation of electromagnetic waves was first described by him, in his paper reporting on the Royal Society on A dynamical theory of the electromagnetic field, based on the results of his research work between 1861 and 1865.
He was the first person that transmit and receive radio waves when he found that the balance of induction caused interference to the phone line. He demonstrated his discovery to the Royal Society in 1880 but just say that's just an induction.
James Clerk Maxwell1873 David E. Hughes
1878
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He was the first to prove the theory of Maxwell through experiments, demonstrated that radio radiation had all the properties of waves (now called Hertzian waves), and discovered that the electromagnetic equations could be formulated into the equation partial derivatives called the wave equation.Heinrich Rudolf Hertz
1886/1888 s = distance of objects that captured radar c = 3 x 108 m/sΔt = Differences of temperature
The Inventor
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1. Radio2. Television3. Cell phone
4. Tsunami detector5. Outer space observation
Application in Daily Life
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The Sample of Problem
1. What the differences between AM and FM?2. Mention the radiowave based on the wave
length!3. Explain the process about radio! (How people
can heard the presenter‘s voice)4. What the relationship between wavelength and
frequency?5. Why FM clearest than AM?
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Conclusion
• Radio wave is one of the electromagnetic wave.• If the wavelength high, the frequency is low.• If the wavelength low, the frequency is high.• The radio wave the largest wave length 1 – 1000 meters and
the smallest frequency ranged between 104 until 107 hertz.• FM is clearest than AM because FM can’t be reflected by
ionosphere so not influenced by atmosphere.• Process of Radio is A->Z (sending process) then Z->A (receiving process)
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Referenceshttp://klikharry.com/2012/05/09/gelombang-radio/
http://fisika-indonesia.blogspot.com/2011/06/makalah-gelombang-elektromagnetik.html
http://matamatafisika.wordpress.com/2012/10/18/jaringan-gelombang-radio-dan-serat-optik/
http://sumber-ilmu-dunia.blogspot.com/2010/03/ilmu-fisika-gelombang-radio.htmlhttp://www.adityarizki.net/2012/01/sistem-kerja-radio-i-transmitter/
http://pakteo.wordpress.com/2010/02/09/pemancar-radio/http://id.answers.yahoo.com/question/index?qid=20110411192233AAkQNYl