In these three ISM bands, the 2.4 GHz band attracts the
most attention. The reason is although FCC has announced
that these three ISM band need no permit, the application
of it is not exactly the same. Only the 2.4 GHz band is the
internationally recognized band without a permit. In other
words, wireless devices based on this band can be
commonly used in most countries. Hence, academia and
industry have attached great importance to this band.
NRF2401A works in the 2.4 GHz. When the pin of
transceiver chip is few and its package is small, it is
conducive to reduce the size of PCB (printed circuit board),
and suitable for measure system design. NRF2401A
adopts a 24-pin QFN package, only 5×5mm, which is the
smallest package size of RF chip in this industry
In these three ISM bands, the 2.4 GHz band attracts themost attention. The reason is although FCC has announcedthat these three ISM band need no permit, the applicationof it is not exactly the same. Only the 2.4 GHz band is theinternationally recognized band without a permit. In otherwords, wireless devices based on this band can becommonly used in most countries. Hence, academia andindustry have attached great importance to this band.NRF2401A works in the 2.4 GHz. When the pin oftransceiver chip is few and its package is small, it isconducive to reduce the size of PCB (printed circuit board),and suitable for measure system design. NRF2401Aadopts a 24-pin QFN package, only 5×5mm, which is thesmallest package size of RF chip in this industry
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