WIFI module long-distance image transmission signal interference problem handling and wireless built-in/external antenna detailed explanation, the emergence of wireless module solves the problem of inconvenient wiring in many scenarios. In outdoor remote monitoring requirements, wireless applications are more flexible and cost-effective than traditional wired monitoring. Later maintenance is more convenient. Therefore, wireless WiFi is very popular in modern remote monitoring needs. However, wireless uses microwaves to transmit signals, so it is inevitable to experience signal interference outdoors. The following will show you how to deal with the interference of buildings or similar equipment.
1. Interference from buildings
When the WIFI module long-distance image transmission encounters the shielding of the object during the transmission process, if the signal transmission distance is not far, in the shielded environment, its transmission direction will change to a certain extent, resulting in signal reflection and attenuation. Although the signal can be received, the received signal strength is weak and the bandwidth is greatly reduced. Therefore, when choosing the installation location of the wireless transmission equipment, the middle should be as clear as possible, and the middle from the transmitting end to the receiving end should be visible to avoid the attenuation of the microwave signal. The monitoring center can receive high-strength wireless signals, thereby improving the monitoring effect. If there is occlusion between the transmitter and receiver, but it is unavoidable, we can avoid intermediate occlusion through elevated equipment or relays.
2. Interfere with similar equipment
Similar devices also have more interference, like WiFi on the same frequency. The signal source, power supply, etc. in the system, in this case, you can adjust the frequency of the WIFI module's long-distance image transmission, select a clean channel, or change the position of the transmitter or receiver of the wireless device, and open the distance between the devices. How to judge whether the WiFi is interfered can be judged by monitoring the screen. If there are phenomena such as packet loss, image instability, clutter, black stripes, ripples, etc., if it means that the long-distance image transmission of the WIFI module is interfered, you need to check the causes one by one.
Not all devices will interfere with wireless devices, such as mobile, Unicom signal towers, walkie-talkies, wireless, etc., and have no effect on wireless microwave devices. In the case of interference sources, the frequency of the equipment can be adjusted, or the installation location far away from the interference source can be selected, thereby greatly reducing the interference to wireless microwave equipment.
As a professional wireless WiFi supplier in the industry, Ferry Smart has 20 years of experience in stable wireless WiFi transmission.
WIFI module long-distance image transmission built-in antenna and external antenna related knowledge in detail. Friends who know the wireless transmission industry know that the wireless module is a transmission device used to transmit audio, video and data signals. The signals generated by the wireless must be transmitted through the antenna, that is, the wireless must be used in conjunction with the antenna. There are two types of common wireless WiFi, one is external and the other is internal. Let us introduce the difference between internal and external antennas.
WIFI module long-distance image transmission built-in antenna:
Since the antenna is integrated with the device, the built-in antenna is small and easy to install. However, the built-in antenna is generally used in short-range wireless transmission systems, because the gain of the built-in antenna is generally small, and the transmission distance must be relatively short. Wireless modules with built-in antennas are generally used within a range of several kilometers. The transmit and receive angles of the device are generally large. The angles can be divided into 30°, 60°, 90° and 180°. The larger the angle, the closer the transmission distance. The monitoring points are relatively close and can be viewed directly at the receiving end. As long as two or more monitoring points on the front end are visible within the receiving angle of the wireless device, the back end can use multiple transmit and receive.
WIFI module long-distance image transmission external antenna:
It is recommended to use an external high-gain antenna to achieve a wireless module of more than 20 kilometers. Because the gain of the built-in antenna is generally not too large, the external antenna is generally used for long-distance wireless transmission systems. In some cases, the video signal needs to be transmitted through multiple receptions, and the angle of the built-in antenna is relatively small. If you need to increase the reception angle, use an external antenna. At the same time, as the transmission distance stretches and extends beyond 10 kilometers or 10 kilometers, the transmission and reception angles of wireless long-distance WiFi will be between 10 degrees and a few degrees. Antenna gain 24dbi.29dbi.32dbi.34dbi, wirelessly through the plug-in, different gain antennas collect data signals like a bowl, the farther the centralized transmission distance is.
When building a wireless transmission system, it is usually necessary to judge according to the situation on site. After all, different environments, different point distributions, and different transmission distances can choose different products. Users don't need to worry too much about these knowledge. When formulating wireless transmission solutions, Ferry Smart's professional technicians will configure appropriate antennas for users according to their specific needs to ensure the stable transmission of users' wireless transmission systems.
