How to increase range of a BLE chip

Thread Starter


Joined Mar 24, 2020

I have an RN4871 Bluetooth chip and integrated it with my micro. The chip is scanning for nearby BLE devices and reporting them to the host micro via UART. However, I see that the range of this chip is just 10 m. I could buy RN4870 and increase the range to 50m, but that's still not enough.

I see that the power output of the chip is 0dBm (1mW) and the max transmit power is 100mW (20dBm) for BLE 5.1. Apparently there is no way to increase this. Lame, I know.

So my only option is to find an antenna that has a higher gain compared to the built-in antenna (5dBm) of the chip and replace it with it. Can somebody back me up on my idea? I want to use a chip antenna as its easy, small and not affected by its surroundings. What Antenna parameters should I consider before picking a new chip antenna for this Ble chip (RN4871U).

Also, is there a better way to increase the range of the chip?


Thank you
Varun R