Long Range Transmitter 88-108MHZ Dipole Fm Antenna
- Transportation:
- Ocean, Land, Air, Express, Others
- Port:
- SHENHZEN, GUANGZHOU, HONGKONG
Quantity:
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Basic Info
| Place of Origin: | CHINA |
|---|---|
| Productivity: | 20000000 |
| Supply Ability: | 200000 |
| Certificate: | ISO9001 |
| Transportation: | Ocean,Land,Air,Express,Others |
| Port: | SHENHZEN,GUANGZHOU,HONGKONG |
Product Description
Product Description
The signal receiving ability of car radio antenna is not determined by a single factor, but the result of the joint action of several key design factors. Although the size of automobile antenna is an important factor affecting the receiving ability of radio signals, it is by no means the only decisive condition.
In the precision system of car radio, FM/AM antenna is like a pair of "band catcher Gemini", which realizes the accurate capture of signal world with tacit division of labor. The working principle of this pair of golden partners is deeply bound to the "wavelength-frequency inverse proportion law" of electromagnetic waves-just like the relationship between the velocity of a river and the width of the river, the low-frequency AM signal is like a rushing river, the wavelength can reach hundreds of meters or even thousands of meters, and an antenna with enough length is needed as a "signal fishing net". By extending the physical size, the interaction range with electromagnetic waves is expanded, just like fishing a big fish in deep water with a long net, so that every inch of antenna becomes an effective carrier for capturing low-frequency signals.
The essence of this design logic is to make the antenna length and the wavelength scale of AM signal form resonance matching: when the antenna length is close to 1/4 of the signal wavelength, the electromagnetic induction efficiency reaches the peak, just like the resonance principle of strings and sound waves, which makes the weak low-frequency signal excite stronger current oscillation on the antenna, thus dragging the distant broadcast signal into the receiving system.
The high-frequency signal in FM band is like a smart jumping stream with short wavelength. At this time, the shorter antenna design can give full play to its advantages, just like catching small fish with a smart net, which can quickly respond to the changes of high-frequency signals and realize efficient reception.
However, the vehicle-mounted environment is complex and changeable, and the signal transmission is vulnerable to all kinds of interference. Pursue the ultimate size simply, just like paying attention to the fishing net size and ignoring the weaving process, which is far from enough to maximize the signal reception. Only by comprehensively considering more influencing factors can the antenna become the real "king of signal catchers".
Parameters such as gain and standing wave are also the core factors affecting antenna performance. Gain reflects the antenna's ability to concentrate the input power, and high gain means that it can receive weak signals more efficiently. Standing wave reflects the matching degree between antenna and transmission line, and low standing wave ratio can reduce signal reflection and improve transmission efficiency. Only by comprehensively considering these parameters can the antenna performance be optimized.
The directional design of antenna can be called "directional radar" of car radio. Through precise technical optimization, it can accurately focus the signal in a specific direction like a radar locking the target, and greatly improve the receiving sensitivity. In the complex electromagnetic environment, this design can effectively shield the "noise interference" of signals in other frequency bands and resist the "turbulent impact" of electromagnetic interference, so that every note captured by the car radio is pure and clear, and the sound quality is always stable.
The choice of materials is also a key link that affects signal transmission. High-quality conductive materials are like an unimpeded "high-speed passage", and metals with outstanding conductivity such as copper and aluminum are undoubtedly ideal building materials for building this passage. They can minimize the energy loss in the signal transmission process, make the signal transmission more efficient, not only capture weak signals quickly, but also ensure the stable output of signals, bringing users high-quality radio enjoyment.
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