Low power radar module induction module power intelligent motion sensing, new low power radar module, lighting control, automatic door, security alarm and other traditional motion sensing applications add "intelligent". The FR radar sensor is a Doppler motion sensor in the form of a single package radar solution in the 24GHzISM band. When operating in automatic mode, the low-power radar module induction module can detect a person at a distance of 15 meters, with a power consumption of less than 5 milliwatts.
The high integration of low power radar module induction module overcomes the complex problems of antenna design, radio frequency knowledge and radar signal processing. This radar sensor can be hidden in products because it transmits and receives through non-metallic materials, allowing radar technology to be applied in everyday life. The low-power radar module sensor can be integrated into laptops, tablets, TVS and speaker systems to wake up when motion or direction of motion is detected. It can put the system to sleep or lock down if no movement is detected within a specified time, saving power and eliminating the need to use keywords to activate the system. The MMIC package includes a pair of wide-beam transmitting and receiving antennas. The horizontal and vertical half-power beamwidths of the two antennas are 80 degrees to achieve maximum coverage.
The low power radar module induction module is integrated with a voltage controlled oscillator (VCO) to generate 24GHz radar signal and stabilize it through a phase-locked loop. The transmit signal chain consists of a medium power amplifier with a configurable output power, controlled through a serial external interface (SPI). Integrated power detector monitors transmitted power. The MMIC has a low noise orthogonal receiver - a low noise amplifier in front of the quadrature zero down conversion mixer, which can bring high sensitivity. Derived from the internal VCO signal, the RC polyphase filter generates the orthogonal local signal of the orthogonal mixer.
The low-power radar module induction module integrated analog baseband consists of a low-power sample-holding circuit, followed by externally configurable high-pass filters, variable-gain amplifiers, and low-pass filters. Integrated target detectors are analog comparators that generate pulses based on the movement of targets ahead of the radar. The detector provides two digital output signals, one indicating movement and the other indicating direction of movement towards or away from the target. The detector circuit has user-configurable hold times, hit counters, and detection thresholds, providing flexibility and reliable protection against false alarms. The hold time is the duration of the detector output remaining active after target detection, and the hit counter is the number of comparator output pulses required to determine effective target detection.
In order to flexibly set performance parameters in automatic mode, the low power radar module induction module MMIC has four four-state input pins QS1-QS4. For example, the user can choose four thresholds to increase or decrease the sensitivity of the detector. For experienced radar users, semi-automatic and SPI operating modes can be selected via QS1 pins. In these modes, the original low-power radar module induction module data can be extracted to a PC or external microcontroller for signal processing through a customized algorithm. For external processing, the evaluation board can be connected to an ArduinoMKR board or a radar base board.
The low power radar module induction module provides presentation software and a radar graphical user interface to display and analyze data in both the time and frequency domains, and the sensor meets ETSI and FCC requirements. As a fully integrated microwave motion sensor, low power radar module induction module provides motion information and direction information, and is controlled by state machine. Radar has unprecedented simplicity in fully automatic mode.
Low power radar module induction module Small Mmics contain two antennas in a double platen package, so the user does not need to carry out complex antenna design. In addition, it enables standard FR4 materials to be used in PCB designs for MMIC. The low power radar module induction module requires a small support circuit: low noise voltage regulator, 38.4MHz crystal vibration, and an external capacitor. Two leds indicate the function of the radar sensor: green for detecting the target and red for direction of movement.
PCB is equipped with motion sensor MMIC support circuit. In addition to simplifying system integration, the low power radar module induction module integration solution enables rapid prototyping to evaluate product functionality. The demonstration board shown is a complete solution for showing the function of the radar sensor MMIC, which can be used directly on the system between the VCC and the ground power supply. Low-power radar module induction modules are small, convincing and cost-effective alternatives to conventional passive infrared sensors in low-power or battery-powered applications.
