Acconeer A111 - Table of Contents

Hardware and physical integration guideline PCR Sensor A111
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2022-03-08 © 2022 by Acconeer – All rights reserved
Table of Contents
1 Introduction .................................................................................................................................... 4
1.1 Radar loop equation ................................................................................................................ 4
1.2 Radar loop radiation pattern ................................................................................................... 5
2 HW Integration - Schematics ......................................................................................................... 6
2.1 Power ..................................................................................................................................... 6
2.2 SPI Interface ........................................................................................................................... 7
3 PCB layout ..................................................................................................................................... 8
3.1 Sensor ground plane size ........................................................................................................ 8
3.2 Impact of PCB routing and nearby components ..................................................................... 8
3.3 Impact of conformal coating ................................................................................................. 10
3.4 Sensor underfill .................................................................................................................... 11
4 Physical Integration ...................................................................................................................... 12
4.1 Radome integration .............................................................................................................. 12
4.2 Radome thickness ................................................................................................................. 14
4.3 Radome distance ................................................................................................................... 15
4.4 Impact on the radiation pattern ............................................................................................. 17
4.5 Multi-layer radome integration ............................................................................................. 19
5 Physical Integration - Lens ........................................................................................................... 21
5.1 Focal distance ....................................................................................................................... 22
5.2 Radiation pattern .................................................................................................................. 24
5.3 FZP Lens Design .................................................................................................................. 26
6 Appendix A: Materials ................................................................................................................. 29
7 References .................................................................................................................................... 30
8 Revision ....................................................................................................................................... 31
Disclaimer ............................................................................................................................................ 32