Is it possible to get UWB certification of Japan with DW3210?


As I know, Qorvo has QM33110W chipset for Japan support.

But is it possible to get UWB certification of Japan using DW3210?

For example, adjust Tx power or modify something,…

Please answer my question.

Thank you.

Hi @EddieKu ,

No it’s not possible.

DW3xxx does not support a pulse shape which can comply with ARIB STD-T91 Overview of ARIB Standards (STD-T91)|Association of Radio Industries and Businesses

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Thank you for your information.

According ARIB STD-T91 as you mentioned, available frequency in Japan is as below,

Indoor usage: 3.4GHz or above and below 4.8GHz, 7.25GHz or above and below
Outdoor usage: 7.587GHz or above and below 8.4GHz, 7.25GHz or above and
below 9GHz

QM33xxxW is supported 5, 9 channel, so I can use channel 9.

But allowed Tx average power is very low as -70dBm.

So I think it’ too hard to communicate using TWR in long range.

Is it right my thought?

Thank you.

Hi @EddieKu ,

where did you found the -70 dBm information. This limit should be for other bands.
For Ch9 uwb band, the limit for STD-T91 is the same defined by FCC (-41.3 dBm /MHz).

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Ok, thank you.

It’s possible to using channel 9 up to -41.3dBm in Japan.

Thank you for your information again.

Hi @EddieKu ,

If you targeting to satisfy ARIB-T91, then we would strongly recommend using a bandpass filter to suppress out of band emissions. QM33120WDK1 is also using the same bandpass filter and can give you an idea about the overall performance.

Furthermore, to measure the peak power on a spectrum analyser, 50 MHz resolution bandwidth is required to satisfy 0 dBm / 50 MHz peak power limitation.


Kind regards,

the Decawave DW3210 module is not specifically listed as a certified product for Ultra-Wideband (UWB) operation in Japan. To legally operate UWB devices in Japan, they must comply with the local regulations and certification requirements set by the Ministry of Internal Affairs and Communications (MIC).

To ensure compliance with the regulations in Japan, it is essential to check the certification status of the DW3210 module with the appropriate regulatory bodies or consult with the module manufacturer or distributor. They can provide information on whether the module has obtained the necessary certifications for operation in Japan or if additional steps need to be taken to comply with Japanese regulations.

Please note that regulatory requirements for UWB devices can vary by country, and it is crucial to adhere to the specific regulations of the region where the product will be used to avoid any non-compliance issues.