Application Note
page 3 of 33
V1.7
2022-08-01
XENSIV™ BGT60LTR11AIP shield
60 GHz radar system platform
Introduction
1
Introduction
1.1
60 GHz radar system platform
The BGT60LTR11AIP MMIC is a fully integrated microwave motion sensor including AIP elements, built-in
motion and direction of motion detectors and a state machine allowing fully autonomous operation of the
MMIC without any external microcontroller. An integrated frequency divider with a Phase-Locked Loop (PLL)
provides VCO frequency stabilization. These features make the small-sized radar solution a compelling, smart
and cost-effective replacement for conventional passive infrared (PIR) sensors in low-power or battery-
powered applications. The MMIC is designed to operate as a Doppler motion sensor in the 60 GHz ISM-band.
The MMIC has four quad-state (QS1-4) input pins that give the performance parameters flexibility even when it
is running in autonomous mode. These pins are used for configuration of the MMIC as explained in section 3.9.
The MMIC supports multiple operation modes, including autonomous mode and SPI mode, which can be
selected via the QS1 pin (see Table 4).
In autonomous mode, the detection threshold (or sensitivity) is set via QS2 pin (see Table 5) and has 16
different levels to fulfill a configurable detection range from 0.5 m up to 7 m with a typical human target Radar
Cross-Section (RCS). The hold time is also configurable in 16 levels via QS3 pin (see Table 6), which allows
detection status holding up to 30 minutes. The device operating frequency can be configured via QS4 pin (see
Table 7) and has 4 different possible frequencies between 61.1 and 61.4 GHz for BGT60LTR11AIP MMIC. In this
mode, the integrated detectors deliver digital output signals indicating motion and direction of motion
(approaching or departing) of a human target.
In SPI mode, a full flexibility regarding radar MMIC parameters configuration e.g. detection threshold, hold time
and operating
frequency…, is off
ered by writing into the MMIC registers the wanted configuration, using an
external microcontroller unit (MCU). In this mode, the integrated detectors, if not disabled, will also deliver
digital outputs indicating motion and direction of motion. If further signal processing is needed, the radar raw
data can be extracted and sampled from BGT60LTR11AIP MMIC and then used for developing customized
algorithms for maximum performance.
The BGT60LTR11AIP shield demonstrates the features of the BGT60LTR11AIP MMIC and gives the user a
“plug
and play” radar solution
. The shield can also be attached to an Arduino MKR board or an Infineon Radar
Baseboard MCU7. A radar Graphical User Interface (GUI), is available via
Infineon Developer Center (IDC)
in
order to display and analyze acquired data in time and frequency domain.
BGT60LTR11AIP MMIC
BGT60LTR11AIP shield
BGT60LTR11AIP Demo
= Radar Baseboard MCU7
+ BGT60LTR11AIP shield
Figure 1
BGT60LTR11AIP shield using BGT60LTR11AIP MMIC
