NJR4234BW series (24GHz Distance Measurement Module, Digital Output type)

24GHz Distance Measurement Modules –Digital Output Type–

NJR4234BW series

Distance measurement sensor using the 24GHz microwave
Measurement distance of 20 m for a pedestrian (B type)
Antenna, Microwave RF circuit, Base-band IF circuit, MCU and also signal processing are integrated
Low-profile package
Low-power-consumption: 37 mA @ 3.3 V power supply
Unique Signal Processing / Algorithm Installation
• High sensitivity mobile object detection (Patented Technology)
• Distance measurement signal processing
• Automatic calibration and gain control
• Radio interference prevention
Adopted UART and digital CMOS output for interface

Products Line-up

Part No. Detection
Antenna Type RF Frequency Region
/ Regulation
NJR4234BWF1C1 Distance Measurement
Stationary Objects
Moving Objects
2 x 4 type
Range: 20m
(B type)
24.05 to 24.25 GHz Japan
/ Technical Conformity
NJR4234BWF2C1 24.15 to 24.25 GHz Europe
/ CE - RE Directive
NJR4234BWF3C1 24.075 to 24.175 GHz U.S.A.
/ FCC Certification


Items Parameters
RF Frequency 24.05 to 24.25 GHz
Output Transmission Power
B type: +12 dBm typ., +13.8 dBm max.
Antenna Angle B type: 42 ° / 28 °
Input Voltage 2.9 to 3.6 V
Current Consumption 37 mA typ. [average]
250 mA max. [peak]
Operating Temperature Range -20 to +60 ℃
(w/o Interfaces & Screws)
B type: (L) 38 x (W) 38 x (H) 4.2 mm
Outline Drawing - B type -

Evaluation Kit

Part No. for Evaluation Kit: NJR4234K
Contents List • Evaluation Board
• USB Cable
• GUI (Download from below)
∗ Sensor module itself needs to be prepared separately.