Nrf52840 small antenna

RE: Nrf52840 small antenna

helsing — Thu, 30 Jan 2025 14:31:05 GMT

Did you have a look at the mentioned antennas?

[quote user="katrindqaws"]

they need large space

this pic is a sample

[/quote]

Is this an example of a solution being too large? What is your requirement? What type of application is it? Do you have room for a connector + an off board antenna (for example made from flexible print)?

RE: Nrf52840 small antenna

katrindqaws — Fri, 17 Jan 2025 20:17:55 GMT

they need large space

this pic is a sample

RE: Nrf52840 small antenna

X4ce — Thu, 16 Jan 2025 04:00:20 GMT

You can look for a 2.4Ghz 50ohm chip antenna.

RE: Nrf52840 small antenna

katrindqaws — Wed, 15 Jan 2025 19:11:10 GMT

i want a small antenna that can be implement in a 5mm * 5mm pcb, PCB antennas require large space

RE: Nrf52840 small antenna

helsing — Mon, 06 Jan 2025 14:23:56 GMT

Hi katrin,

How small do you need the antenna to be? The smallest solution is probably a chip-antenna. We generallly do not provide recommendations, however, the prototyping platforms, Thingy:53, Thingy:91 X and Thingy:91 are all using small chip-antennas and will provide you with some examples. The BOM is available in the hardware files for example, Thingy:91 hardware files (there are two BOM-folders in the .zip files, look in PCA****->Production files->BOM).

Please see the nRF52840 Dongle for an example showing a small PCB-antenna. You may copy the antenna from the dongle hardware files, just keep in mind this antenna needs to be tuned for your specific custom PCB + casing. If you make the antenna a little bit longer than what you need you can tune it by cutting the PCB and shortening the trace.

PCB-antennas are said to provide more flexibility for tuning, however, chipantennas are widely used as well.

RE: Nrf52840 small antenna

X4ce — Sat, 04 Jan 2025 08:53:31 GMT

Hi,

You can find detailed PCB & Antenna guideline here.

Regards