How to Address Interference Challenges in 2.4GHz Chip Applications

This article focuses on introducing the application of Yufanmicro's 2.4GHz chip, G350, and delves into the selection of working frequencies for 2.4GHz wireless technology along with solutions to address interference problems.

Choosing the Right Working Frequency:

The frequency range for 2.4GHz wireless technology spans from 2.400GHz to 2.4835GHz. When utilizing a 2.4GHz chip, the primary concern is ensuring that the working frequency falls within the designated range. It's advisable to leave a slight frequency margin, for example, opting for 2.405GHz or 2.4830GHz, as certain factors such as the chip's frequency deviation, 2.4GHz crystal oscillator error, and PCB trace routing might impact the actual working frequency.

Resolving Interference Challenges:

Interference is a common issue in 2.4GHz applications. To address different scenarios, the following solutions can be employed:

a. Frequency Hopping Technology: When severe interference occurs in a specific frequency band, employing frequency hopping technology is beneficial. Frequency hopping enables the 2.4GHz chip to move between multiple frequency points. It's recommended to use five frequency points and evenly distribute them within the 2.4GHz band. This way, even if some frequency points encounter interference, effective communication can still be achieved. The choice of frequency points can be adjusted based on the Received Signal Strength Indication (RSSI) values.

b. Frequency Hopping Time Intervals: To ensure effective frequency hopping, the reception time at a frequency point on the receiving end should be longer than the time it takes for the transmitting end to send data on each frequency point. Otherwise, the receiving end may miss signals from the transmitting end.

c. Handling Interference from Multiple Devices: When dealing with multiple products operating simultaneously, the chip's filtering capabilities may become insufficient as the number of devices increases. In such cases, setting different frequency hopping tables can be a solution, ensuring that each device has its own unique frequency table. This way, multiple devices can operate together without interfering with one another. This measure can be achieved based on the chip's unique code.

In summary, when working with 2.4GHz chips, careful attention should be paid to selecting the appropriate working frequency. To tackle interference issues, utilizing frequency hopping technology is recommended. Additionally, to address interference from multiple devices, employing different frequency hopping tables can enable seamless operation of multiple devices.

Yufan Micro offers the G350 2.4GHz chip and also provides a 2.4GHz + MCU 2-in1 integrated chip. For any 2.4GHz chip requirements, feel free to contact Yufanmicro anytime.