Texas Instruments CC13 Series, Application Report

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1 SWRA523B – September 2016 – Revised March 2017
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Copyright © 2016–2017, Texas Instruments Incorporated
CC13xx Antenna Diversity
Application Report
SWRA523B – September 2016 – Revised March 2017
CC13xx Antenna Diversity
ABSTRACT
This application report describes a preamble quality-based antenna-diversity patch for the CC13xx
SimpleLink™ Sub-1 GHz ultra-low power wireless microcontroller (MCU).
Recommended register settings discussed in this application report can be downloaded from
http://www.ti.com/lit/zip/SWRA523 .
Contents
1 Introduction
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2 Antenna Diversity Patch
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2
3 Building a Software Example
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4 Measurement Results
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5 References
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List of Figures
1 Antenna Diversity Flow Chart
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2 SmartRF™ Studio Setup for TX
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3 PER vs Input Power Level (6-Byte Preamble, 6-dB Attenuator on One Antenna)
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4 PER vs Input Power Level (8-Byte Preamble, 6-dB Attenuator on One Antenna)
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5 PER vs Input Power Level (6-Byte Preamble, 6-dB Attenuator on One Antenna)
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6 PER vs Input Power Level (8-Byte Preamble, 6-dB Attenuator on One Antenna)
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7 Block Diagram of Antenna Diversity Test Setup
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8 Antenna Diversity Test Board
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List of Tables
1 Register Overrides to be Removed from SmartRF™ Studio Code Export
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2 Register Override to be Added to the SmartRF™ Studio Code Export
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3 Configuration Registers
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4 Status Registers
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5 Typical 1% BER Sensitivity (20% PER, 3-Byte Payload)
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6 Test 1 PER for Boards Using ANT1, ANT2, or Diversity (DIV)
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7 Test 2 PER for Boards using ANT1, ANT2, or Diversity (DIV)
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8 Test 3 PER for Boards Using ANT1, ANT2, or Diversity (DIV)
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9 Test 4 PER for Boards Using ANT1, ANT2, or Diversity (DIV)
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Trademarks
SimpleLink, SmartRF are trademarks of Texas Instruments.
ARM, Cortex are registered trademarks of ARM Limited (or its subsidiaries).
All other trademarks are the property of their respective owners.