Radio Wave11.2 group 1

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The Inventor

Application

Problem

Conclusion

Reference

Definition

How it Happen

Classification

Group 1Anshori Suhendro (04)

Aulia Ekayanty (06)Elisabet Siwi (12)

Fauzan Rizqy Kanz (15)

Radio wave

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

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.

According To The Frequency According To Wavelength

According To Modulation System

Classification of Radio Waves

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

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)

According To Modulation System

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).

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

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

1. Radio2. Television3. Cell phone

4. Tsunami detector5. Outer space observation

Application in Daily Life

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?

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)

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