24 GHz radar module minimises size & power

November 14, 2016 // By Graham Prophet
Presented as the smallest and lowest-power single transceiver available, this module by RFbeam Microwave employs low-cost 24 GHz industrial radar chips from Infineon.

Infineon and RFbeam Microwave (St. Gallen, Switzerland) have collaborated to produce the single Tx/Rx module; low-cost 24 GHz transceiver system modules from RFbeam use Infineon BGT24LTR11 and BGT24MR2 24 GHz radar sensors. They provide a plug-and-play-solution for original equipment manufacturers in need of either motion detection for persons or speed/distance measurement capabilities.


Possible fields of usage include advanced motion detection, speed, direction and distance measurement. Application examples in these fields are movement and presence detection which can be integrated in e.g. advertising panels. In traffic applications, the radar system can be used for red light management for roadworks or speed detection, as well as car classification systems such as toll roads or car park barriers.


RFbeam’s modules include antennas either with or without an integrated signal processing enabling manufacturers of industrial radar systems to optimize their system’s capability. If necessary, this allows for the detection of speed and direction of movement (approaching or retreating) in addition to the easier detection of motion only. The current RFbeam portfolio offers three modules with various antenna characteristics, for MCU signal processing and different options for Doppler, FMCW (frequency modulated) or FSK (frequency shift keying) operation modes.


The K-LD2 module uses the BGT24LTR11 radar chip. The K-LD2 is one of the smallest (25 x 25 mm) radar transceivers available with integrated signal processing and 80° x 34° antenna pattern. The module can be used for applications where indoor/outdoor motion detection is required.


The K-MD2 employs Infineon’s BGT24MR2 twin receiver MMIC. It supports speed, range and angle measurement and delivers a digital output. The integrated range-Doppler processing is suited for high-end traffic applications. Each module offers a reliable and robust solution defined for specific applications with a precise measurement of object detection.


The 24 GHz transceiver BGT24LTR11 and BGT24MR2 MMIC radar sensors offer a fully integrated low phase noise voltage controlled oscillator (VCO) and built-in temperature compensation circuit for VCO