After the read, you will learn:
- The definition of magnet mount antenna
- The main items for the use of magnet mount antennas
- The application of magnet mount antenna
The main function of the magnet mount antenna is to radiate and receive radio waves.
What Is A Magnet Mount Antenna?
The main function of the magnet mount suction cap antenna is to radiate and receive radio waves.
The magnetic mount antenna is fixed in a certain place by passing the antenna through the suction cup at the bottom to avoid accidents. Because its suction cup base is relatively stable, it is widely used on vehicles.
In the wireless module industry, magnetic mount antennas are often used in conjunction with wireless modules to achieve the purpose of increasing the communication distance of the wireless modules.
First, the definition of magnet mount antenna
The composition of the magnet mount antenna, the conventional sucker mount antenna is mainly composed of four pieces: antenna radiator, strong magnetic base, feeder cable, and antenna connector.
1. The antenna radiator is made of stainless steel, pure copper, alloy, steel, etc.
The shape is generally whipped or rod shape. The radiator of the magnet mount antenna sucker antenna is actually a monopole (whip-shaped) antenna, and one arm of the symmetrical oscillator is perpendicular to an ideal conductor plane (ground).
According to the antenna principle, the resonant frequency of the line antenna is an integer multiple of 1/2 wavelength. Based on the principle of mirroring, on an ideal infinite plane, the ideal minimum electrical size of the magnet mount antenna is 1/4 wavelength. If you want to increase the gain, you can add the antenna rod at the center to increase the length of the antenna radiator (1/4 wavelength integer multiple).
2. The function of the strong magnetic base is to fix the entire antenna and ensure that the sucker antenna is in conductive contact with the attracted metal.
3. Feeder cable generally includes RG series (RG58, RG174), 3D wires, etc.
4. Common antenna connectors are N-type, SMA, BNC, TNC, I-PEX, and other RF connector types.
Among them, the commonly used connectors for sucker antennas are N-type, SMA, BNC, TNC, etc., which are denominated in males and females. When choosing an antenna, be sure it is necessary to purchase connectors that match the equipment.
Second, the main items for the use of magnet mount sucker antennas
Why should the magnetic sucker antenna be sucked on the metal?
The electrical performance of the antenna is closely related to the environment in which it is used. The resonant frequency is affected by the dielectric constant of the material surrounding the antenna. Its use and performance are inseparable from the design environment requirements and installation environment.
The radiator of the magnetic antenna mentioned above is a monopole antenna. According to the principle of mirroring, the monopole antenna of length h and its mirror image form a symmetrical element with a total length of 2h, and its field in the upper half of the space is the same as that of the symmetrical element. , The field strength in the lower half of the space is zero.
Generally speaking, the suction cup antenna is mainly used in cabinets, smart meters, smart devices, terminals, car roofs, or similar environments, so it is designed based on various cabinets and car body models so that the size is much larger than the metal grounding part of the communication frequency wave wavelength Become part of the antenna.
Therefore, the difference in the installation position will directly affect the changes in the electrical parameters of the original design of the antenna, especially the resonant frequency and the radiation direction.
The antenna’s suction cup changes as the antenna’s radiation direction change as it connects to different sizes of metal ground.
When magnet mount antennas are adsorbed on metal bodies of different sizes, their performance is completely different.
When we use the magnetic mount antenna, we recommend the following two points:
- It is required to be adsorbed on the top of the cabinet or locomotive to ensure the height and radiation direction in order to achieve the best performance of the antenna; if it is installed in other parts, it will cause the standing wave, the pattern and the elevation angle to change, which will affect the communication range.
- Try to install the antenna in a wide view, avoid installing it in a shaft or in a complex electromagnetic environment. Only in this way can the communication quality be improved and unpredictable interference phenomena such as background noise can be reduced.
Third, the application of magnet mount antenna
The magnet mount antenna has lots of advantages.
The magnet mount antenna has a better standing wave ratio and higher efficiency than the built-in antenna If the installation method is correct, and no customization is required; it has higher gain and longer transmission distance under the same frequency band and structure size as the glue stick antenna, which can be used according to actual needs Choose a different installation location.
In addition to the above advantages, the suction cup antenna also has a wide range of uses. In addition to the vending machines, express cabinets, and car radios that we see daily, it can also be applied to wireless modules and wireless gateways with medium gain requirements.
The sucker cup antenna magnet mount antenna can be used in outdoor electric boxes and vehicles. When used outdoors, the radome can be made of glass fiber-reinforced plastic, which is waterproof and windproof.
The magnetic base mount antenna magnet mount antenna can also be used in vending machines. The base of the antenna is a strong magnetic base suction cup, which is easy to install and not easy to fall.
The magnetic base mount antenna can also be used for wireless meter reading, the antenna structure is lightweight and beautiful in appearance.
Currently, the sucker antennas are supplied by C&T RF Antennas Inc and include various frequency bands, materials, and connectors for you to choose from.
We can also customize products for you individually to meet your individual needs if our standardized and large-scale products cannot meet your needs, welcome to contact the C&T RF Antennas Inc engineering antenna design team.
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