0
What basic law of electromagnetism explain how an antenna picks up a radio signal?
Wiki User
∙ 9y ago
RF energy is transmitted through an electromagnetic field. Once the field meets the receiving antenna, voltages are produced by using the antenna as a conductor. RF voltages induced by the antenna are passed on to the receiver then reconverted to transmitted RF information.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoThe basic law that says sound waves travel great distances is why an antenna can pick up a signal. Satellites are a good example of how computers and televisions pick up signals from space.
Add your answer:
Earn +20 pts
Explain the basic principles of physical science?
physics basic principle as determination changeability universality varifibility predictablity by jitendra chaudhary
What is Einstein's theory of relativity and what does each letter stand for?
e is energy c is the speed of light and m is the mass of the object or lightwave. C is constant while m is computable through basic calculations or through advanced upper level electromagnetism.
What are the properties of Electromagnetism?
An electromagnet is created when an Fe core is wrapped in a conductor and an electric current goes through the conductor; magnetism and electrical current have a symbiotic relationship -- when a conductor is moved in a magnetic field, electrons start to move and when electrons move through a conductor, a magnetic field is created around the conductor; a simple motor uses an electromagnet to do work.
What does radar use to determine velocity and location of objects?
Radar sends out a signal, either radio waves or microwaves. The signal then reflects off of objects and back to the radar. The radar logic calculates the time it takes for the signal to return and can then calculate the distance. The velocity is then measured by the rate of change in distance or by doppler shift. The doppler shift is a change in the frequency of the signal, as the signal is either compressed or stretched from impact with a moving object. The signal frequency is compressed if the object is moving toward the radar and stretched if the object is moving away. - - - - - Almost. Radar uses two inputs to determine the location of an object. The first is the length of time it takes the radar pulse to reach the target and return to the antenna. The speed of radio waves is 300,000 km/sec. Since it's got to go out and come back, divide that by two--so, if you send out 100 pulses per second and the antenna doesn't move, the radar can detect targets up to 1500 km away. (Since the antenna on a radar normally is movable, things get more complex than I want to get into at one in the morning, sorry.) The other is the position of the antenna. If your guy shows up at a 300-degree antenna position and it takes 0.01 millisecond for the pulse to return, he's 1.5 kilometers from your antenna at that specific azimuth. ----- Right on jmoreader. Also, the questioner should know that there are several different types of radar. Weather, Aircraft, or even the radar gun that cops use to check your speed. All of which work a little differently but rely on the same principles. A radar gun being the most simple as it doesn't really collect rangeing or position data, only velocity I believe. One interesting system is Composite Radar used for weather. There are inherent problems in using a single radar facility to view areas of rain, snow, or even turbulence within a storm cell. Most of the so called "curtain" effect is overcome by using several radar sites in different locations. When you view weather radar on television or elsewhere, the image you see is actually a computer generated image comprised from data collected by multiple radar locations. Viewing the weather from different "angles" provides a more complete and much more accurate image of the actual weather condition. As jmoreader pointed out, radar systems are generally quite complicated, but, the basic principles are fairly simple and common across the board. Send a signal out and analyze the return.
What is the first step in recording sound waves?
The first step is amplification of the sound that is picked up by a microphone. This usually consists of a basic 'pre-amp' section which brings the audio signal up to workable levels, and a secondary amplification which makes the signal strong enough to be processed by the recoding circuit.
How many channels do i get with basic cable?
That will depend on your location and the signal strength of your antenna. Use *1 for help in figuring out which antenna will work best for your location.
What has the author Eugene W Cowan written?
Eugene W. Cowan has written: 'Basic electromagnetism' -- subject(s): Electromagnetism
Meaning of propulsion system in maglev?
the basic system uses electromagnetism
What has the author E R Dobbs written?
E. R. Dobbs has written: 'Basic electromagnetism'
What the basic components of tansmitter?
The basic components of a transmitter are; transistors, capacitors, resistors, condenser, Inductor, and antenna.
Basic function of various blocks of c band satellite receiving system?
first basic function of various is Antenna
Why is reflection of signal useful?
Reflection of a transmitted signal is the basic premise of radar and sonar.
How do you hook up an external mp3 player to a 2006 Saturn Ion 2 with the basic stereo system?
purchase an FM mudulator. it wires to your antenna to give an input signal through an FM station(88.7 for example). i bought one at a car stereo shop.
What is Wireless transmission system?
A wireless transmission consists of at a minimum: input signal (the data or analog signal you wish to transmit), transmitter, 2 antennas, space (the final frontier) and a receiver/reproducer. This only makes one way transmission possible. You would need an additional: transmitter, receiver/reproducer and 2 antenna couplers (allows both a transmitter and receiver to use the same antenna) to have 2 way communication. A basic transmitter consists of a power source, a signal generator (oscillator), signal converter/amplifier, mixer (mixes the oscillator and amp signals to create the transmitted signal), output amplifier. a receiver is similar to a transmitter except instead of mixing the signal with the oscillator signal it removes the oscillator signal. Systems can be much more complicated depending on power needs (distance between antennas, frequency interference...) and application (encoder/decoder, security or digital conversion).
What is the basic function of an amplifier?
An amplifier will amplify a signal. For example, the antenna in a radio will receive an extremely weak signal; before it can be converted to a sound, it must be amplified (made stronger), by a factor of several million. Of course, since you can't produce energy out of nothing, an amplifier doesn't actually produce the energy for the strong version of the signal - it requires a power supply.
What is signal transmission?
Signal transmission is a process of transmitting data through basic understanding language of the network.
What are basic elements of digital signal processing?
The basic elements in digital signal processing are an analog to digital converter, digital signal processor, and digital to analog converter. This process can take an analog input signal, convert it to digital for processing and offer an analog output.
