Digital Uhf Vhf Tv Antena Outdoor tv aerial hdtv antenna amplified hd long range high gain tv antenna
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- Supplier: Shenzhen Ouchenyi Technology Co. Ltd.
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Product Overview
Description
one. What kind of antennas are there?
A: There are omnidirectional antennas and directional antennas, including single-polarized antennas, dual-polarized antennas, dual-frequency dual-polarized antennas, and ESC antennas.
two. What are electromagnetic waves?
Answer: There are many types of mobile antennas, and there are many classifications and orientations. According to their working status, they can be divided into two categories.
Omnidirectional, directional, when the high-frequency signal is transmitted from the beginning to the end along the feeder, the current or voltage of each point on the line will change according to the beat of the high-frequency oscillation. Like invisible waves. If the terminal load does not match the characteristic impedance of the feeder, the load cannot absorb all the power of the incoming high-frequency signal.
There is bound to be a part of the power from the terminal to return to the starting end through the feeder,
The former is called the incident wave and the latter is called the reflected wave. When the terminal load is matched,
The high-frequency power is completely absorbed by the terminal, and at this time, there are only incident waves on the feeder and no reflected waves.
three. What is radio wave propagation?
Answer: Radio communication is to convert information into electrical signals, and then modulate it into high-frequency oscillations.
The adjusted high-frequency current is transmitted by the transmitting antenna in the form of electromagnetic waves. When the electromagnetic waves propagate to the receiving site,
It is received by the receiving antenna and turned into a modulated high-frequency current that is amplified, demodulated, and
Extract information to achieve the purpose of communication.
Four. What is the role of antennas in radio communications?
Answer: The antenna is a transducer, and the transmitting antenna is a device that converts high-frequency electrical energy into electromagnetic waves.
The receiving antenna is a device that converts electromagnetic waves into high-frequency electrical energy.
Therefore, it occupies an extremely important position in radio communication, how is the installation quality of the antenna,
It plays an important role in the quality of mobile communication, so when designing and installing the antenna, we must pay great attention to ensuring the quality. . 3M long small feeder, why can't it be bent?
Five: 3M long small feeder, why can't it be bent
Answer: The 3-meter-long small feeder is called the horizontal line. Its function is to regularly send the electromagnetic waves received by the antenna to the 7/8 feeder.
If the small feeder is bent, the electromagnetic wave will be resisted and the standing wave ratio will be increased.
A: There are omnidirectional antennas and directional antennas, including single-polarized antennas, dual-polarized antennas, dual-frequency dual-polarized antennas, and ESC antennas.
two. What are electromagnetic waves?
Answer: There are many types of mobile antennas, and there are many classifications and orientations. According to their working status, they can be divided into two categories.
Omnidirectional, directional, when the high-frequency signal is transmitted from the beginning to the end along the feeder, the current or voltage of each point on the line will change according to the beat of the high-frequency oscillation. Like invisible waves. If the terminal load does not match the characteristic impedance of the feeder, the load cannot absorb all the power of the incoming high-frequency signal.
There is bound to be a part of the power from the terminal to return to the starting end through the feeder,
The former is called the incident wave and the latter is called the reflected wave. When the terminal load is matched,
The high-frequency power is completely absorbed by the terminal, and at this time, there are only incident waves on the feeder and no reflected waves.
three. What is radio wave propagation?
Answer: Radio communication is to convert information into electrical signals, and then modulate it into high-frequency oscillations.
The adjusted high-frequency current is transmitted by the transmitting antenna in the form of electromagnetic waves. When the electromagnetic waves propagate to the receiving site,
It is received by the receiving antenna and turned into a modulated high-frequency current that is amplified, demodulated, and
Extract information to achieve the purpose of communication.
Four. What is the role of antennas in radio communications?
Answer: The antenna is a transducer, and the transmitting antenna is a device that converts high-frequency electrical energy into electromagnetic waves.
The receiving antenna is a device that converts electromagnetic waves into high-frequency electrical energy.
Therefore, it occupies an extremely important position in radio communication, how is the installation quality of the antenna,
It plays an important role in the quality of mobile communication, so when designing and installing the antenna, we must pay great attention to ensuring the quality. . 3M long small feeder, why can't it be bent?
Five: 3M long small feeder, why can't it be bent
Answer: The 3-meter-long small feeder is called the horizontal line. Its function is to regularly send the electromagnetic waves received by the antenna to the 7/8 feeder.
If the small feeder is bent, the electromagnetic wave will be resisted and the standing wave ratio will be increased.
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