How to improve the anti-interference capability of wireless module?

The anti-interference capability of wireless module cannot be specifically digitized, so it is generally not placed as a regular parameter in the data sheet of the wireless module.

Whether the anti-interference capability matters or not?

The answer is YES ,anti-interference capability is very important.

Under the same transmission power and receiving sensitivity, the wireless module with stronger anti-interference capability can transmit longer distances.

Why does improving anti-interference capability can increase the communication distance?

During the wireless module communication, sources ofinterference are ubiquitous (magnetic fields, metals, walls, etc.). When thesignal is transmitted in the air, it will be constantly interfered by theinterference source,and the signal will be attenuated,when the signal isattenuated to a certain extent, the receiver will not receive the transmittedsignal,. As a result, the communicationdistance is shortened.

Can theinterference source be completely circumvented?

There is no way to completely avoid the interference source even wired communication. the best way is to improve the anti-interference capability of the wireless module. The followings are the solutions to improve the anti-interference capability:

1. Keep away from interference sources

Try to avoid using wireless modules in the places where there are many sources of interference (avoiding interference sources is the most effective and direct way). If you have to work in such an environment with many sources of interference, please see below.

2. Bandwidth

In the field of wireless communication, the narrower the bandwidth, the better the anti-interference capability.so,properly modifying the bandwidth can improve the wireless module’s anti-interferencecapability during communication.

3. Reducethe transmission rate

The faster transmission rate will cause the signal strength to decay faster. Properly reducing the transmission rate can enhance the signal strength, there by improving the anti-interference capability of the wireless module.

4. Directional antenna

Wireless module can use a high-gain directional antenna,

A directional antenna is an antenna which transmitting and receiving electromagnetic waves is particularly strong in specific directions,while transmitting and receiving electromagnetic waves in other directions is zero or very small. The use of directional antennas is to increase the strength of the signal.

5. Shielding case

Adding a Shielding case on the wireless module is the best way to improve the anti-interference capability . The shielding case can shield the influence of certain external interference sources from the chip, meanwhile,Shielding case can also prevent interference and radiation from wireless module to the outside environment when wireless module is working. For deails, pls refer to:https://www.nicerf.com/articles/detail/wireless-module-plus-shielding-cover.html

6. Filter

The filter is distinguished according to the frequency. For example, 433MHz can only use the filter of the corresponding frequency. Its main function is to filter out other frequencies that are not 433MHzto prevent interference from other frequency bands, thusachieving anti-interference ability effect.

If you have a better way to improve the anti-interference capability, you can share it with us. Please feel free to contact us.