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2011-07-27 12:13:30
2011-07-27 12:13:30

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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A receiving antenna does "re-radiate" some of the power it receives, but not all. Some of the power it receives proceeds into the receiver ... which is the only way we detect the signal being received by the antenna.

omni-directional is the opposite of directional. A directional antenna receives or sends more signal from or to the front than the sides or back.

Radio receivers are designed to receive radio signals in conjunction with a receiving antenna.

Radiates and/or receives radio signals.

A television repeater can be a TV translator. It receives a distant station thru a receive antenna mounted high on a tower then re-broadcast this signal from transmit antenna(s) on a different channel, mounted on the same tower.

In the microphone, there is a diaphragm, which converts the DJ's voice into an electrical signal. This signal is sent along the wire to the antenna, which broadcasts it into the ether. Your home radio receives the signal through its aerial, then converts the signal from an electrical signal to audio - which is detected by your ear.

The size of an antenna depends upon the frequecny of the RF signal and the gain.

Replace the existing antenna with an active antenna.

To get the wave signal

To improve the signal :)

The on screen signal strength meter will help find the direction your antenna should point. Turn the antenna until you see the highest meter reading.

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 reflection - again, when properly matched.

Put an digital receiver at the end of it. The antenna does not change to receive a digital signal, it is passive.

An antenna booster takes in the antenna signal and reproduces it at a higher power. This will give you better reception and quality.

Get the signal meter on screen then rotate the antenna to the spot the meter reads the highest, this is the point of most signal. Leave the antenna in that position. spreading the rods apart results in more gain.

The mosquito's antennas are used to help them mate. A female sends out a vibrating signal, and the male can sense it with his antenna and send a signal back.

A digital antenna offers a clearer sound and signal than a regular antenna. There is no interference or static. However, while an analog antenna can get the signal through a hill, the digital antenna must be able to see the broadcast tower.**************************************************************There is no difference. An antenna is designed for a particular frequency or band of frequencies. The mode of modulation is totally irrelevant.

the digital signal is converted to analog signal after using by transmitted antenna

An active antenna is an antenna which has an amplifier attached very closely to it. The antenna/amplifier system is called an active antenna. It is used for receiving signals only. The idea is to set the signal-to-noise ratio (SNR) before the signal travels along a transmission line where it is susceptible to interference and loss.

While all GPS systems come with an internal antenna with which it uses to contact the satellites in orbit, there are accessories available. If you buy a antenna attachment, it can improve your signal quality.

Antenna amplifiers are used to strengthen the signal being supplied to an appliance such as your TV. Amplifiers are necessary when the signal is weak and interferes with your TV reception.

A hub resends the signal it receives out through all ports, except the port where it received it.A hub resends the signal it receives out through all ports, except the port where it received it.A hub resends the signal it receives out through all ports, except the port where it received it.A hub resends the signal it receives out through all ports, except the port where it received it.

Your radio signal works by using its signal to go to a tower and back to your radio (Via antenna).

Cell phone signal boosters usually use an additional antenna which is placed in an area where reception is relatively stable, often outside. The extra antenna inside will then rebroadcast and amplify the signal to the external antenna - essentially bouncing the signal from point to point until it gets to the spot with good reception.

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