Atmel AVR10004: RCB256RFR2 – Hardware User Manual [APPLICATION NOTE]
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4.7
PCB layout description
This section discusses critical layout details, important for derived PCB designs. A derived design should carefully
consider the following details:
•
Establish a solid ground plane for the antenna. The PCB area has to be considered as a counterpart of the
antenna. The PCB interacts with the radiated electromagnetic wave
•
Isolate digital noise from the antenna and the RF and analog radio transceiver sections to ensure maximum
possible radio transceiver performance
•
Isolate digital noise from the reference crystal to ensure maximum possible transmit signal purity and receiver
performance, especially when operating in high data rate ISM modes
•
Reduce any kind of spurious emissions well below the limits set by the individual regulatory organizations
Layout details 1 to 9, as shown in
are described in the following sub-sections.
