In the 21st century, telecommunications has entered the era is so powerful. When a couple of decades ago the phone was a luxury home, now named cell phone (mobile phone) has an everyday item. The price is getting cheaper made mushroomed. But did you know that behind all this is that the energy transfer events are so phenomenal
Who does not know or mobile phone (mobile phone)? Introduced in the 1980s, today's communications tools have become fixtures of everyday. Many people in cities in particular, young and old often seen showing it off when it is not in use. Placed in a pants pocket, tucked at the waist, or some are intentionally kept hold while occasionally used for pointing. The price is more affordable to make this stuff can be owned only by the not-rich.
Whatever it is, a tool increasingly cute and attractive size has also been considered as a 'friend' on a trip or at a very practical move. He could hook us up with relatives, colleagues, and even the grumpy boss from anywhere. Telecommunications technology has enabled it can be used anywhere. Especially with the launch of mobile satellites, which in turn allows small objects can be used in remote areas (remote areas), even from the middle of the ocean. One that makes it superior to phone home, namely its cordless or wireless.
The revolution in the field of telecommunication has indeed been through a terrible stage. When daily activities has so overlaps (overlap), is further advanced equipment becomes a decisive tool. It can be used as a messenger and important news than as a medium for light conversation, in which young people used to call 'chat slang'.
However, did you know that to reach this stage, hundreds of engineers have spent many years in laboratoirum to uncover the mysteries behind it. Starting from studying the mysteries of electromagnetic waves, the properties of radio waves following classifications, until air or atmospheric parameters of the media perambatanannya. All of this is related to the energy transfer invisible, so anything related to it can still be referred to as a natural phenomenon. If in the city within a certain time interval there are two million people conversing with colleagues by phone, we did not ever truly understand how crowded spark or an electromagnetic wave radiation generated each milling.
Mobile devices themselves are not really sophisticated. This tool is basically just a radio transceiver (transmitter-receiver/pengirim-penerima) ordinary, like walkie-talkies or handie-talkies are often standard equipment so police or security officers. The main part of the telecommunications equipment is an oscillator for generating a radio signal, radio frequency amplifier, mixer (mixer), wave counter (detector), and the audio signal amplifier.
Then why is it called a mobile phone? This title seems to depart from the stretch signal booster antenna network built RBS (radio base station) is a catcher and spreader device signals. For a city, the network operator or so-called provider (whether it's Telkomsel or Satelindo) ordinary share in the form of cells that form an imaginary, in which each cell is represented by an antenna RBS. That's why mobile phone (mobile phone) is to be known also as a mobile phone.
The smaller
Trace back, in its history, both mobile phones and other wireless telecommunications equipment, principally related to the results of two experiments conducted scientist named James Clerk Maxwell (1831-1879) and Heinrich Hertz (1857-1894). Maxwell managed to uncover some of the natural phenomenon of electromagnetic waves which insists that the speed of electric-magnetic radiation is equal to the speed of propagation of light, which is about 186,000 miles (300,000 km) per second. Meanwhile, on different occasions, Hertz equip Maxwell with the results of scientific study reveals that the radio waves are part of this natural phenomenon. To appreciate the efforts Hertz, the world scientific community then use the name 'Hertz' as the unit of frequency or cycles per second.
In the characteristics and functions of different electromagnetic waves themselves can be sorted out by the spectrum becomes (ranging from the largest to the narrowest wavelength): radio waves, microwaves, infrared, light / visible light, ultraviolet light, X-rays, and gamma rays . In particular, radio waves occupy the wavelength region of several kilometers to 0.3 meters, while the frequency of a few Hertz up to 10 ^ 9 Hertz. The wave is then broken down to thousands of channels and is used internationally for various purposes under the supervision of the International Telecommunication Union.
At first, the radio itself only used a limited circle in the army. Form the first handheld radio in the beginning is still as big and heavy bricks. In this form, he is still far from practical. However, the benefits of high makes it used anywhere. On the battlefield it can be used as the sender equipment orders, results reconnaissance, and command a very strategic. In the event of World War II, the shape and strength many times repaired. In the decade of the 70s, the shape can be reduced with the invention of transistors that can represent dozens of components is large, and by the decade of the 80s is getting smaller again with the successful creation of the integrated circuit which can contain dozens or even hundreds of electronic components to the components of which only amounted to buttons. This finding makes telecommunications equipment becomes increasingly bermasyakat because production costs are becoming increasingly cheaper and wider benefits. Digital technology also makes these devices even better.
In the history of telecommunications, Indonesia itself was stuck as the fourth country in the world after the U.S. consumer communications satellite, the Soviet Union, and Canada. The first satellite was named SKSD Palapa A slide in 1976 that was used as a 'unifying' archipelago. Operation performed by Perumtel (now PT Telkom). In addition to long-distance telecommunications commercial purposes, it is also used as the sender of television signals in addition to governmental purposes. Satellite itself functions just as a relay station receiver and router * high frequency signal that is not reflected layer of the atmosphere. If SKSD Palapa tend to operate for the purposes of government, the other agencies, PT Indosat (Indonesia Satellite Corporation), also operate the satellites, but for commercial purposes even if only on a lease.
In the 70's, maybe some of us still remember how excited can enjoy series Akbar Muhammad Ali boxing match. This is thanks to the support Intelsat Indosat hired for the purpose of commercialization of the broadcast television world. These satellites are also used for the benefit of the international conversation. As soon as the opening of the telecommunications network utilization also makes various telecommunication companies worldwide are racing to another commercial innovation. Indosat, for example, has recently introduced 12 services that can be connected to 250 countries. Starting from IDD 001, Conference Call, Precard, Virtual Net, Indonesia Direct, to free phone. In the services are then called Indosat @ your life is, the user is becoming increasingly easier to contact anyone anywhere in the world.
