Radiowave

1. Radio Wave 11.2 group 1

2. Home Compiler Matters The Inventor Application Problem Conclusion Reference Definition How it Happen Classification

3. G roup 1 Anshori Suhendro (04) Aulia Ekayanty (06) Elisabet Siwi (12) Fauzan Rizqy Kanz (15) Radio wave

4. One of the electromagnetic wave. ( doesn’t need medium to propogate) The largest wave length 1 – 1000 meters The smallest frequency ranged between 10 4 until 10 7 hertz . The radio wave is mostly used in daily life such as in telecommunication. The examples are handphone, television and radio. Definition

5. 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.

6. According To The Frequency According To Wavelength According To Modulation System Classification of Radio Waves

7. According To Frequency FREQUENCY 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

8. 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)

9. According To Modulation System

10. According To Modulation System Amplitude Modulation (AM) A n information carrier have a big frequency , the range is between 550 kHz until 1.600 kHz C an be reflected by the Ionosphere th at caused AM has a high reach and u sed for communication over long distances . But AM is not clear because influenced by weather. The F requency Modulation (FM ) T he frequency ranged is about 88 kHz until 108 kHz. C an not be reflected by the Ionosphere th at caused FM has a narrow range. B ut FM is clear because not influence by the atmosphere (ionosphere).

11. 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 indu ction cause d 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 Maxwell 1873 David E. Hughes 1878

12. 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 10 8 m/s Δ t = Differences of temperature The Inventor

13. 1. Radio 2. Television 3. Cell phone 4. Tsunami detector 5 . Outer space observation Application in Daily Life

14. The Sample of Problem What the differences between AM and FM? Mention the radiowave based on the wave length! Explain the process about radio! (How people can heard the presenter‘s voice) What the relationship between wavelength and frequency? Why FM clearest than AM?

15. 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 10 4 until 10 7 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)

16. References http://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.html http://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