Application Note
page 7 of 32
V1.0
2021-03-31
Distance2GoL (Software-Controlled FMCW) low-power radar shield using
BGT24LTR11 for range detection and human tracking
Introduction
Distance2GoL
Radar
Baseboard
XMC4700
BGT24LTR11
Shield
Distance2GoL
Figure 1
Distance2GoL demo platform
Note:
The BGT24LTR11 Shield in Distance2GoL platform is assembled for Software-Controlled FMCW
operation.
The circuitry for the BGT24LTR11 Shield (Software-Controlled FMCW) is designed to perform human target
range detection and tracking with low power consumption. In this approach, the BGT24LTR11 MMIC is
controlled using a software-based open-loop concept. Frequency is measured periodically and VCO is tuned
accordingly. This implementation has the advantage of reducing the PCB space, BOM cost and power
consumption by eliminating the external (Phase Locked Loop) PLL IC. System performance might be lower than
an external PLL, but can address a lot of applications like smart lighting, motion sensing or proximity detection,
etc.
