433MHz RF Transmitter And Receiver Module: Factors Affecting Distance

After purchasing the 433MHz RF transmitter and receiver module sold by the manufacturer, the customer finds that the transmission distance is shorter than the distance described in the product, which may cause it to not be used normally. I believe anyone with experience knows that the use distance will be shorter than the product introduction distance.

What factors affect the transmission distance of the 433MHz RF transmitter and receiver module?

1. The transmission distance introduced by the manufacturer's product is a more accurate data tested in an open area with a better environment. Customers buy it and use it with more environmental interference, such as building walls, trees, etc.
2. After the power supply is used for a period of time, the voltage will decrease, resulting in a decrease in the transmission distance.
3. In order to reduce the transmission time, some users increase the rate of the 433MHz RF transmitter and receiver module, resulting in a reduction in the transmission distance.
4. The antenna is one of the factors that affect the transmission distance of the module.

How to improve the transmission distance of the 433MHz RF transmitter and receiver module?

For the first situation above, when the transmission distance is not far enough, you can choose some places with fewer obstacles to increase the distance.

For the second situation above, if you want to increase the transmission distance, you can replace a power supply with a large capacitance and a stable voltage.

In view of the third situation above, the transmission rate can be lowered when in use, so that the transmission distance of the 433MHz RF transmitter and receiver module can be increased.

In view of the fourth situation above, it is recommended to use a high gain antenna to make the transmission farther. In addition, increase the height of the antenna and try to keep the antenna at least 2 meters away from the ground, so that a better transmission distance can be achieved.

The above are the factors that affect the transmission distance of the 433MHz RF transmitter and receiver module. The method described above can basically solve the problem of insufficient transmission distance. It should be noted that: When buying, you can ask about the actual transmission distance in a more complex environment. The distance used should be similar to the distance introduced. For example, the use distance is 5000 meters, and the module with a transmission distance of 2500 meters is selected when purchasing. This kind of module cannot be used normally.