Tell You What Is The 3-axis Car Satellite TV Antenna

Tell you what is the 3-axis Car Satellite TV Antenna
The 3-axis car satellite TV antenna is a converter that converts the traveling wave propagating on the transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or vice versa. A component used in a radio to transmit or receive electromagnetic waves. Radio communication, radio, television, radar, navigation, electronic warfare, remote sensing, radio astronomy and other engineering systems, all use of electromagnetic waves to transmit information, rely on 3-axis car satellite TV antenna to work. In addition, in the use of electromagnetic waves to transmit energy, non-signal energy radiation also need 3-axis car satellite TV antenna. General 3-axis car satellite TV antenna is reversible, that is, the same 3-axis car satellite TV antenna can be used as a launch 3-axis car satellite TV antenna can also be used to receive 3-axis car satellite TV antenna. The same 3-axis car satellite TV antenna is the same as the basic characteristic parameters for transmitting or receiving. This is the reciprocal theorem of the 3-axis car satellite TV antenna.
3-axis car satellite TV antenna radiation is a radio wave, the receiver is also a radio wave, but the transmitter through the feeder into the 3-axis car satellite TV antenna is not a radio wave, to receive 3-axis car satellite TV antenna can not radio waves directly Fed by the feeder into the receiver, which must pass through the energy conversion process. Here we take a radio communication equipment as an example to analyze the signal transmission process, and then explain the 3-axis car satellite TV antenna energy conversion.
At the transmitter, the modulated high-frequency oscillating current (energy) generated by the transmitter is transmitted via a feeder device to a 3-axis automotive satellite TV antenna (the feeder can be transmitted directly with frequency and form, direct current or electromagnetic waves) 3-axis car satellite TV antenna will be high-frequency current or guided wave (energy) into radio waves - free electromagnetic waves (energy) to the surrounding space radiation (see Figure 1); at the receiving end, radio waves (energy) by receiving 3-axis car The satellite television antenna is converted to high frequency current or guided wave (energy) to the receiver via a feeder device. From the above process can be seen, 3-axis car satellite TV antenna is not only radiation and receive radio waves device, but also an energy converter, is the circuit and space interface devices.
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The role of 3-axis car satellite TV antenna
In any radiocommunication apparatus, there is always a means for radiating electromagnetic energy and receiving electromagnetic energy from the space, which is a 3-axis car satellite television antenna. The role of a 3-axis satellite satellite television antenna is to transmit a digital signal or analog signal modulated to a radio frequency to a spatial radio channel or receive a digital or analog signal modulated at a radio frequency from a spatial radio channel.
3 axis automotive satellite TV antenna problem from the electromagnetic field theory, 3-axis automotive satellite TV antenna problem is essentially a 3-axis car satellite TV antenna generated by the spatial electromagnetic field distribution, and by the spatial electromagnetic field distribution determined by the electrical characteristics. The electromagnetic field at any point in the space satisfies the electromagnetic field equation - the Maxwell equation and its boundary conditions. Therefore, the 3-axis automotive satellite TV antenna problem is a special form of time-varying electromagnetic field problems. From the signal system point of view, 3-axis car satellite TV antenna problem can be understood as a study by the electromagnetic excitation source generated by the electromagnetic response characteristics. From the point of view of the communication system, the 3-axis car satellite TV antenna can be understood as the signal transmission and receiver, and the radio signal strength between the 3-axis car satellite TV antenna is satisfied to meet the channel transmission equation and the multipath fading characteristic.