New motion sensor board uses Doppler Shift technology

MikroElektronika has launched a new motion sensor Click board to support the development of intrusion alarms, automatic door openers, presence-sensing applications, and more.

Microwave 4 Click uses the Doppler Shift phenomenon to sense motion. It is based on the PD-V12, a miniature high-frequency microwave transceiver from Ningbo Pdlux Electronic Technology. This motion sensor is a K-band Bi-Static Doppler transceiver module. It is housed in a metal can and provides a built-in resonator oscillator (CRO), supplying a stable operation as it enhances its front signal-receiving ability and decreases its blind area. The sensor detects the frequency shift between a transmitted and a received signal reflected from a moving object within the field of view of the transceiver.

The radiated power (EIRP) emissions of <3mW at maximum meet the FCC and CE regulations. The noise voltages at the output port inside an anechoic chamber are measured from 10Hz to 100Hz. The received signal strength (RSS) is measured at the total 1 Ways path loss of 70dB. The module utilises two antennas (for RX and TX) with a maximum gain of 0dBi and is intended to be installed in such a way that permits it to operate at closer than 20cm to users or nearby persons.

Comments Nebojsa Matic, CEO of MIKROE: “Microwave 4 Click is one of nearly 100 motion sensor Clicks and one of over 500 sensor Clicks that we offer. Our aim is to offer a very wide range of peripheral add-on boards to enable the embedded design engineer to have the widest possible choice.”

Click boards allow design engineers to change peripherals easily, cutting months off development time. The mikroBUS socket standard facilitates any Click board to instantly connect to the microcontroller or microprocessor on a main board. Many leading microcontroller companies, including Microchip, NXP, Infineon, Dialog, STM, Analog Devices, Renesas and Toshiba, now include the mikroBUS socket on their development boards.