Bluetooth onboard antenna

QWE4562009 · Published on 2021-10-13 17:15

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Bluetooth onboard antenna

There is a Bluetooth chip manufacturer in China, which mainly targets Nordic products. Some models can even be pin-to-pin, but their Bluetooth antenna is a bit strange. RF and GND are short-circuited. I don’t understand what’s going on? Who knows?

Is it to increase the radiation area of RF? Then RF should not be short-circuited with GND!

Take NB-IOT or 4G antenna as an example. The RF antenna base has only one pin, which is connected to the RF feed point. The other four pins are connected to GND, and there is absolutely no short circuit with RF!

EricCheng · Published on 2021-10-13 17:43

It is recommended to understand the antenna feed end

xxhhzz · Published on 2021-10-13 17:51

This is the case for all PCB antennas. The important thing is that RF and GND cannot be simply understood as short circuits.

QWE4562009 · Published on 2021-10-13 18:21

Nobody knows?

qwqwqw2088 · Published on 2021-10-13 21:01

2.4G antenna design reference on PCB board

bobde163 · Published on 2021-10-14 08:48

First, learn about the antenna design principle. The problem you mentioned is normal.

Fred_1977

RF high-frequency circuits must be analyzed using the concept of magnetic fields, and cannot be analyzed using the circuit method of low-frequency signals.

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