Surface mountable radar modules for touch-free switches

Operating in the 24.0 GHz to 24.25 GHz ISM band, the Infineon transceiver features a fully integrated low phase noise voltage controlled oscillator (VCO) and built-in temperature compensation circuit for VCO stabilisation.

Additionally it has full ESD protection, 200 GHz bipolar SiGe: C technology B7HF200 and single supply voltage of 3.3 V. These features make the Infineon MMIC the ideal part at the heart of the new InnoSenT series.

The ultra-compact design of the SMR offering (20 mm x 15 mm x 3 mm) eases the integration, allowing installation even in the smallest space available. It provides a perfect solution for Security Applications, Home-Automation, Lighting Control, Intelligent Machine Control, Touch-free Switches, and Movement Detection.

Radar used in motion detection applications increases accuracy when compared to passive infrared (PIR) technology. It allows a more precise measurement of object detection and provides new capabilities such as the detection of speed and direction of moving objects. Radar is also superior to camera based systems by allowing detection of the objects while keeping identities anonymous.

The SMR series currently comprises three types with different antenna characteristics. In addition to the option of simple motion detection with a corresponding evaluation, it is also possible to determine speed information and direction of movement to the detected object from the returned data.

The Silicon Germanium radar MMIC from Infineon was designed with the Doppler-radar applications in mind, which enables additional functionalities. Beside 24 GHz fundamental voltage controlled oscillator (VCO) it also brings variants for FMCW (frequency modulated) or FSK (frequency shift keying) operation mode to this series.