APS009: Using the DW1000 with an external power amplifier
© Decawave 2015 This document is confidential and contains information which is proprietary to
Decawave Limited. No reproduction is permitted without prior express written permission of the
author
TABLE OF CONTENTS
LIST OF FIGURES ............................................................................................................................................... 2
LIST OF TABLES ................................................................................................................................................ 2
1 INTRODUCTION ........................................................................................................................................ 4
1.1 OVERVIEW ................................................................................................................................................. 4
1.2 COMPLIANCE WITH REGULATIONS ................................................................................................................... 4
1.2.1 LAES compliance ............................................................................................................................. 4
1.2.2 Caution advised............................................................................................................................... 4
1.3 HARDWARE AND SOFTWARE MODIFICATIONS .................................................................................................... 4
2 HARDWARE IMPLEMENTATION ............................................................................................................... 6
2.1 OVERVIEW ................................................................................................................................................. 6
2.2 CONTROL SIGNALS ....................................................................................................................................... 6
2.3 POWER SUPPLIES ......................................................................................................................................... 6
2.4 RF PATH .................................................................................................................................................... 6
2.4.1 Overview / Basic scheme ................................................................................................................ 6
2.4.2 Detailed schematic .......................................................................................................................... 7
2.4.3 PCB layout ....................................................................................................................................... 9
3 SOFTWARE IMPLEMENTATION ............................................................................................................... 10
3.1 INTRODUCTION ......................................................................................................................................... 10
3.2 REGISTER PROGRAMMING ........................................................................................................................... 10
3.3 CODE CHANGES ......................................................................................................................................... 10
4 OTHER CONSIDERATIONS ....................................................................................................................... 12
4.1 INTRODUCTION ......................................................................................................................................... 12
4.2 EFFECT ON ANTENNA DELAY & ITS CALIBRATION ............................................................................................... 12
4.3 RECEIVER SIGNAL-BASED EFFECTS .................................................................................................................. 12
4.3.1 Effect on range bias & its correction ............................................................................................. 12
4.3.2 Potential receiver saturation ........................................................................................................ 12
4.4 RECEIVER ACCUMULATOR WRAP-AROUND ...................................................................................................... 12
5 REFERENCES ........................................................................................................................................... 13
6 DOCUMENT HISTORY ............................................................................................................................. 13
7 MAJOR CHANGES ................................................................................................................................... 13
8 ABOUT DECAWAVE ................................................................................................................................ 14
9 APPENDIX 1: COMPONENT SPECIFICATIONS .......................................................................................... 15
9.1 BALUN ..................................................................................................................................................... 15
9.2 POWER AMPLIFIER ..................................................................................................................................... 16
9.3 RF SWITCH ............................................................................................................................................... 17
LIST OF FIGURES
FIGURE 1: BASIC SCHEME .............................................................................................................................................. 7
FIGURE 2: HARDWARE SCHEMATIC .................................................................................................................................. 8
FIGURE 3: PCB LAYOUT ................................................................................................................................................ 9
LIST OF TABLES
TABLE 1: DW1000 PINS ASSOCIATED WITH THE CONTROL OF AN EXTERNAL PA SCHEME ........................................................... 6
