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RFbeam Microwave GmbH | Schuppisstrasse 7 | CH-9016 St. Gallen | www.rfbeam.ch | K-LD2 | data sheet

09/2018 - Revision B | Page 1/20

– Small and low cost digital 24 GHz radar motion detector

– Detection distance up to 15m (human) 30m (cars)

– High immunity against interferences

– Integrated FFT signal processing with digital outputs

– Sensitivity and hold time can be set using analogue inputs

– Advanced detection data read-out over serial interface

– Wide power supply range from 3.2 to 5.5V

– 2 × 4 patch antenna with 80°/ 34° beam aperture

– General movement detection applications

– Door opener

– Illumination of advertising boards

– Touch free switches

– Security systems

– Indoor and outdoor lighting control applications

– Object speed measurement systems

– Industrial sensors

The K-LD2 is a fully digital and low cost radar movement detector.

The digital structure makes it very easy to use in any stand-alone

or MCU based application where a movement detection or speed

measurement is required.

The sensor includes a 2 × 4 patch radar front-end with an asymme-

trical beam and a powerful signal processing unit with two digital

outputs for signal detection information. The sensitivity and the hold

time are adjustable using analogue inputs with potentiometers. The

serial interface features a powerful command set to read-out advan-

ced detection data or to fully customize the detection algorithm.

There is no need to write own signal processing algorithms or

handle small and noisy signals. This module contains everything

that is necessary to build a simple, yet reliable movement detector.

A very small footprint of 25 × 25 × 6.5 mm gives maximum flexibility

in the product development process.

A powerful evaluation kit (K-LD2-EVAL) with signal visualization

on a PC is available.

Features

Applications

Description

data sheet

K-LD2

radar transceiver

Figure 1: K-LD2 block diagram

Tx

Rx

signal processing unit

voltage regulator

detect

miscellaneous

serial interface

sensitivity

hold time

24.125 GHz

K-LD2

Block Diagram