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There are two primary types of electrical amplification available for any application.
The first type, transistor amplification, is what you are most likely familiar with. This is the common form of amplification used today in most consumer products like radios and car amplifiers. However, before the invention of the transistor, vacuum tubes did the same job. Tubes are electrical switches mounted inside of glass enclosures that are under vacuo. They resemble light bulbs. In radio transmission, however, these vacuum tubes are commonly the size of a household clothes dryer. These tubes amplify the frequency before the voltage is sent up the radio station's transmission tower. At the top of the tower, a broadcast antenna is mounted. These antennae are special shapes and lengths that correspond to both the frequency and direction of the intended transmission.
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Are radio waves a form of sound or light?
When you listen to the radio, you are hearing sound, which has no resemblance to light, radio waves, or x-rays. However, the sounds you hear are created in the radio receiver, using information that was carried to your location by means of radio waves.
How do you change the frequency on a radio controlled car?
To change the frequency on a radio controller car, you change the crystal in the transmitter and receiver.
What is narrow bandwidth antenna?
An antenna (or aerial) is an electrical device which converts electric currents into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter applies an oscillating radio frequency electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals, that is applied to a receiver to be amplified. An antenna can be used for both transmitting and receiving.Antennas are essential components of all equipment that uses radio. They are used in systems such as radio broadcasting, broadcast television, two-way radio, communications receivers, radar, cell phones, and satellite communications, as well as other devices such as garage door openers, wireless microphones, bluetooth enabled devices, wireless computer networks, baby monitors, and RFID tags on merchandise.Typically an antenna consists of an arrangement of metallic conductors ("elements"), electrically connected (often through a transmission line) to the receiver or transmitter. An oscillating current of electrons forced through the antenna by a transmitter will create an oscillating magnetic field around the antenna elements, while the charge of the electrons also creates an oscillating electric field along the elements. These time-varying fields radiate away from the antenna into space as a moving electromagnetic field wave. Conversely, during reception, the oscillating electric and magnetic fields of an incoming radio wave exert force on the electrons in the antenna elements, causing them to move back and forth, creating oscillating currents in the antenna.Antennas may also contain reflective or directive elements or surfaces not connected to the transmitter or receiver, such as parasitic elements, parabolic reflectors or horns, which serve to direct the radio waves into a beam or other desired radiation pattern. Antennas can be designed to transmit or receive radio waves in all directions equally (omnidirectional antennas), or transmit them in a beam in a particular direction, and receive from that one direction only (directional or high gain antennas).The first antennas were built in 1888 by German physicist Heinrich Hertz in his pioneering experiments to prove the existence of electromagnetic waves predicted by the theory of James Clerk Maxwell. Hertz placed dipole antennas at the focal point of parabolic reflectors for both transmitting and receiving.
What are radiowaves and how they are formed?
Radio waves Radio waves are electromagnetic waves occurring on the radio frequency portion of theelectromagnetic spectrum.Discovery and utilizationRadio waves were first predicted by mathematical work done in 1865 by James Clerk Maxwell. Maxwell noticed wavelike properties of light and similarities in electrical and magnetic observations. He then proposed equations, that described light waves and radio waves as waves of electromagnetism that travel in space. In 1887, Heinrich Hertzdemonstrated the reality of Maxwell's electromagnetic waves by experimentally generating radio waves in his laboratory. Many inventions followed, making practical the use of radio waves to transfer information through space. Nikola Tesla and Guglielmo Marconi are credited with inventing systems to allow radio waves to be used for communication.For more information go to:http:/en.wikipedia.org/wiki/Radio_waves
What is FM transmitter and what are the different FM transmitters?
FM transmitter : In this case the frequency of a carrier signal is modulated/altered in accordance with that of frequency of modulating signal. TYPES OF FM TRANSMITTER: 1> directly modulated FM transmitter. 2>indirectly modulated FM transmitter. an FM transmitter is a portable device that plugs into the headphone jack or proprietary output port of a portable audio or video device, such as a portable media player, CD player, or satellite radio system. The sound is then broadcast through the transmitter, and plays through an FM broadcast band frequency. Purposes for an FM transmitter include playing music from a device through a car stereo, or any radio.
What do baby monitors have to do with Electromagnetic waves?
The monitoring device is a radio transmitter that sends signals to the radio transmitter. Radio waves are a type of Electromagnetic waves.
What is the output of a radio transmitter?
radio waves
How does a microwave produce micro waves?
Same way a radio transmitter produces radio waves. The device is called a magnetron, which is sometimes used as a pars pro toto for the whole microwave oven.
How much energy does radio waves carry?
that depends mostly on the transmitter power and the square of the distance from the transmitter.
How do different obstacles affect radio waves?
Radio waves hit all obstacles the same, but the waves will differ in the distance of the wave and/or the object from the transmitter.
Is it true that the transmitter of a radio station combines an electronic signal with a sound waves?
No. The transmitter of a radio station emits an electromagnetic signal that has been modified by sound waves that were converted into an electronic signal.
What is a radio waves energy?
(The power of the radio transmitter) times (the length of time it continues to transmit)
How does microwaves travel to make a phone work?
They travel just like the radio waves that make your car radio work. They are sent from a transmitter - and picked up by your phone - the phone sends radio waves back to the transmitter to complete the circuit.
What do radio waves come out of?
They come out of a transmitter, usually through an antenna system.
How are radio signals broadcast?
from transmitter through air molecules in the form of waves
Who invented the radio player?
If you're asking, who invented radio, an Italian inventor named Marconi is generally credited with the invention of radio around the end of the Nineteenth century.A radio is not a player, it is a device consisting of a transmitter, which changes sound waves into radio waves that can travel great distances. The second part of a radio is called a receiver. It receives the radio waves the transmitter sends out and converts them back to audible sound.
How does a usb radio transmitter work?
Radio transmission occurs when sound or pictures are changed into waves and transmitted. Radio waves are then sent to receivers. The more powerful that a signal is, the further the signal will travel
