The communication distance is a very important indicator of the wireless module. Many users may find that the communication distance of the device cannot reach the nominal distance of the manual when using the device. In fact, the communication distance will be affected by many factors, and the ideal communication situation cannot be achieved simply by powering on the device. So when the communication distance does not achieve the effect we expected, what aspects should be improved?
power adjustment
First of all, the power supply should be considered. The operation of the wireless module will be affected by power supply noise, including various glitch voltages and high-frequency harmonics. It is necessary to use a suitable power supply for decoupling to eliminate voltage glitches on the power line. Ensure that the RF signal output by the antenna pin is stable and reliable.
At the same time, the wireless module is also a power-consuming device, which requires a stable power supply to ensure its working status. When choosing a power supply, it is also necessary to consider whether the power supply capacity of the power supply can support the power consumption of the module operation. It is best to ensure that the power supply performance of the power supply can have a margin of more than 30%.
Therefore, when planning wireless products, a power chip with a small ripple coefficient and sufficient load current should be selected as the power supply unit of the entire module so that the entire wireless system can maintain efficient and stable operation and ensure sufficient transmission distance.
Transmitter and Receiver Adjustment
The transmitter and receiver need to be adjusted accordingly for different application scenarios. For example, if several kilometers of wireless transmission are required, it is recommended to choose a wireless module with a transmission power of 30dBm, that is, more than 1W, and a higher receiving sensitivity, preferably with an additional power amplifier (PA) and a low-noise amplifier (LNA). module, otherwise it cannot guarantee such a long-distance wireless transmission effect.
antenna adjustment
The system gain of a wireless system is equal to the sum of the transmit power and the antenna gain, so the quality of the antenna gain has a great impact on the long-distance transmission effect of the wireless system. When the antenna and the system match each other, the higher the antenna gain, the farther the effective transmission distance of the entire system will be.
The common small suction cup antenna generally has a gain of 2.0dBi, and the gain of some outdoor antennas with relatively strong performance can reach 5-8dBi. If the effect of long-distance data transmission is not ideal, you can properly replace the antenna with a higher gain antenna, which can effectively extend the transmission distance.
In addition to the selection of the antenna, the installation of the antenna is also very important. When installing the assumption, try to install the antenna as high as possible, and at the same time adjust the position of the antenna to be parallel to the same horizontal plane, so as to ensure the antenna. The wireless signal sensing surface can reach the maximum state, to ensure the maximum strength of the electromagnetic signal sent and received, and to enhance the transmission distance of the wireless signal as much as possible.
transmission path
Although the wireless signal has no specific shape, it is transmitted in a straight line in the air. If obstacles are encountered during the transmission process, it will have a great impact on the transmission effect, especially metal obstacles, which not only have the effect of blocking wireless signals , Metal also has a certain absorption and reflection effect on electromagnetic waves, which seriously affects the quality of signal transmission. Therefore, when performing long-distance wireless transmission, it is necessary to choose a suitable transmission path, try to avoid the influence of various obstacles on the transmission, and ensure that the transmission channel is clean and smooth.
Working frequency adjustment
After entering the information society, wireless transmission has been integrated into every aspect of our life. Various wireless transmission devices can be seen everywhere in life, but wireless devices in the same frequency band will interfere with the communication of other surrounding devices. Therefore, during the actual installation of the equipment, it is necessary to conduct a survey of the electromagnetic environment at the installation site, and try to select a cleaner channel frequency point to avoid mutual interference with other equipment in the environment.
The communication distance is a relatively complex index in the wireless transmission system, and this index will be affected by various factors and environments. If you want to achieve the ideal communication distance, you need to consider as comprehensively as possible, and try to eliminate adverse effects from all aspects to ensure the stable operation of the wireless system.
Ebyte Electronic Technology Co., Ltd. specializes in R&D and production of wireless data transmission modules with various functions in various frequency bands. The products have been widely used in various application scenarios such as the Internet of Things, medical care, smart homes, and highways. If you have any needs, please contact email: service-es-@cdebyte.com or visit the website: https://www.es-ebyte.com/
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