User's Manual
Table Of Contents
- 1 Introduction
- 2 Disclaimer
- 3 Overview
- 4 Functional description
- 5 PCB layout description
- 6 Mechanical description
- 7 Electrical characteristics
- 8 Abbreviations
- References
- EVALUATION BOARD/KIT IMPORTANT NOTICE
- 9 Table of contents
10
Atmel AVR2092
8427A-AVR-10/11
5 PCB layout description
This section describes critical layout details to be carefully considered during a PCB
design. The PCB design requires an optimal solution for the following topics:
• Create a solid ground plane for the antenna. The PCB has to be considered as a
part of the antenna; it interacts with the radiated electromagnetic wave
• Isolate digital noise from the antenna and the radio transceiver to achieve
optimum range and RF performance
• Isolate digital noise from the 16MHz reference crystal to achieve optimum
transmitter and receiver performance
• Reduce any kind of spurious emissions below the limits set by the individual
regulatory organizations
The REB232ED PCB design further demonstrates a low-cost, two-layer PCB solution
without the need of an inner ground plane.
The drawing in Figure 5-1 sho
ws critical sections using numbered captions. Each
caption number has its own subsection below with detailed information.
Figure 5-1. Board layout – RF section.