How an antenna receives signal?
An antenna is built and tuned specifically to resonate at a certain frequency or set of frequencies. In receiving, this resonance will appear as an RF voltage across the antenna, or between the antenna and ground. This RF voltage is usually modulated in order to carry information, for example a radio station. You generally use a receiver of some kind to "decode" this information, and make it usable to humans again, for example, play the music as audio through a loudspeaker.
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What can I do to fix this everytime I key up my CB radio it causes my GPS receiver to lose signal and I have to unplug it and plug it in again to get signal back GPS is outside opposite of antennae?
Answer . There is no way to solve the problem. Because of the high power of the CB transmitter and the low power of the satellite signals, the CB signal clips the GPS recei…ver, and it can even damage your GPS.. More . The CB and the GPS unit work on entirely different frequencies, to be sure, but the fact that a several watt transmitter of any kind is right on top of a GPS unit can hammer the GPS. There is no way to "limit" the radiated power of the CB (if you still want it to work) so that it won't affect the GPS.
Antennas transfer energy from a cable into the airwaves efficiently. Any transmit antenna can also be a receive antenna and viceversa. If you wish to transmit high power from …an antenna, usually heat generation or high voltage is a concern that can destroy the antenna. To prevent problems, high power antennas require thicker wires and sometimes insulators to prevent overheating/burning and arcing. Many antennas can simply be made of wire of a simple length and they'll be very efficient. The length of an antenna changes it's efficiency to the cable. If you want the antenna to be efficient, you must size it to match the cable impedance. Usually the length of a single wire exiting above a metal plate is one quarter wavelength or 1/4 x 11,803/frequency in megahertz. For FM radio on an automobile, some antennas have motors that extend out of the body of the car. The height (inches) should be 1/4 x 11,803/100 megahertz or just under 30 inches. TV antennas above a house are most often a set of half wavelength wires, so change the 1/4 to 1/2 in the formula above. They use many different wire lengths to cover all the frequencies in the television band, which extends from about 50 megahertz to around 600 megahertz. Cell phone frequencies were picked partly to make the antennas small and partly so that cell phone reception can enter buildings with rebar reinforcement. Cell phone frequencies are roughly 800 megahertz and 1800 megahertz. Receiver antennas are often made smaller than either transmit or transceiver antennas. If you open up the back of an older transistor radio, you are likely to find a bar made of ferrite material with an insulator and wire wrapped around that. The wire is wrapped a number of turns to match the impedance required by the circuit. The ferrite bar is able to focus signals to itself which in turn induces a current in the coil. While impedance is an important issue, simple dipole antennas can be sized by the 468/Frequency in mHz formula. It will give the the length of an antenna in feet. You divide the outcome by 2 to find out what each side length should be. The impedance of an antenna can ofter be adjusted by its shape. The 90 degree V shape yields a near perfect 50 ohms impedance which is commonly used for transmitters and transceivers where as the flat top diode has a higher impedance. The ARRL has good books on antennas. You might want to go to the library and look at a few of them.
Do you need antenna to receive digital signals on LCD TV the TV has a built in HDTuner Can we use indoor antenna?
All TVs including new ATSC Digital ones use the same frequencies as older NTSC Analog sets. An amplified antenna is recommended because there is a threshold where a weak analo…g signal will be visible (with considerable static) but a digital tuner will not have sufficient strength to display a digital (no noise or static) picture. Outdoor roof Antennas work great as well, you don't need an HDTV antenna, discount stores should have one for around $30.
\nNo. There will be no analog signal to receive and process from the outdoor antenna. The only signal coming from the outdoor antenna will be digital. When the conversion is c…omplete. You will need to hook up your antenna directly to the TV. Your conversion box will be worthless as far as analog to digital is concerned.
To transmit and receive signals to and from multiple nodes in a three-story house what type of antenna should an access point use?
Omnidirectional Antenna would send and receive
If you run the antenna under test in the receiving mode, then while it is rotated, you'll monitor signals received by the antenna under test.. If you run the antenna under te…st in the transmit mode, then while you rotate it, you'll monitor signals received by a different antenna on the test range.. Either way, the varying signal must be monitored at the receiving end of the link.. It's a lot more convenient, and a simpler configuration, to have the signal monitor and the rotation/excitation controls for the antenna under test in the same place , in order to react appropriately to any funny things noted during the test run.
To transmit and receive signals to and from multiple nodes in a three-story house what type of antenna should an access point use.?
You should buy an omnidirectional antenna with a high gain (measured in dBi) if you have a wireless G or B router. If not, I recommend you to buy a wireless N router that come…s with 3 antennas. It really increases your signal strength and range. You don't need to have a wireless N adapter to use it, as it supports the older modulations
I think the question needs to know how to increase signal strength from Receiving Antenna. 1. Use Better and bigger Ground. This will not only increase signal but will al…so increase S/N ratio. 2. Generally increasing the size of antenna helps. 3. Use elements that can increase the effective area of the antenna. 4. Ensure that the antenna is well matched to the feeder feeding the RF signal.
NICs, radio antennas, Televisions, brain cells, and, theoretically, aliens, and you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Resolution is determined by the receiver, not the antenna.
The signal is 1080i
Most toys have a very poor antenna so simply making it bigger may give you an improvement. What actually are you trying to achieve? Is it a greater distance between transmitte…r and receiver ?
put a fork into the Ariel whole :)
To transmit and receive signals from multiple nodes in a three-story house what type of antenna should an access point use?
No. Satellite signals are very weak- after all, they are small devices, trying to spray a signal all over a continent. To pick them up requires an antenna pointed directly at …them (no fun watching five satellites at the same time!) and a bulky bit of technology called a "low noise amplifier". Neither could be built into an LCD TV. Sorry.
In a properly matched antenna, signal does not reflect back - the transmission line and antenna combination is seen, electrically, as an infinite line - so there is no reflect…ion - again, when properly matched.
To cut a wire or aluminium tubing length for a dipole antenna take your frequency in Megahertz that you want to tune the antenna to and divide that number by 468. This will be… the full wave length of the frequency you will be tuning to. For general purpose listening cut the antenna to mid frequency of the FM band. Cut this wire (or tubing) into two equal pieces. This will be the driven element feed point. For a yagi antenna cut a reflector 10% larger that the first cut and place it 1/2 wavelength behind the driven element on the boom. For the director cut the wire length (or tubing) 10% smaller that the driven element and place it on the boom 1/2 wavelength in front of the driven element. This will give you a three element yagi antenna.