The radar front end TRA_120_002 is a compact IC module characterized by a high measurement resolution in the 120-GHz ISM band between 122.0 and 123.0 GHz. Its transmitter and receiver branch have separate signal lines.

The focus of radar MMIC TRA_120_002 is on maximum integration. Here both antennas, one for transmitter and one for receiver branch, are monolithically integrated in the chip to offer lowest size and loss. Please also see our hybrid integrated MMIC radar TRX_120_001.


The radar chips provide measurement signals for distance and speed measurement of objects as an analogue signal. In combination with a subsequent external signal evaluation at the customer side, possible applications are the investigation of material surfaces, the measurement of layer thicknesses and other properties of the measured objects. The main application area of the 120 GHz transceiver radar front end is for short range radar systems with an operation range of up to 10 meters. By using dielectric lenses or mirrors, the range can be increased beyond 100 metres.

In addition, radar is a widely deployed long range sensing solution for safety and convenience features such as automated emergency braking (AEB), automated parking and adaptive cruise control (ACC), leveraging frequencies between 76 GHz to 81 GHz. As vehicle OEMs look to continually improve sensing resolution, radar is now becoming increasingly important for in cabin Driver and Occupant Monitoring Systems (DMS/OMS), leveraging higher frequencies from 120 GHz to 140 GHz enabling vital sign detection, including heartbeat and respiration, to ensure occupant safety. These higher, license free frequencies also support the use of antenna on chip techniques that significantly simplify PCB design, minimize sensor form factor and reduce cost criteria particularly important for DMS/OMS applications where external antennas impose industrial design limitations unacceptable to automotive manufacturers.

No handling of high frequencies on PCB

The high-frequency radar signal is already converted to a lower frequency in the radar front end IC. The IC’s output is an analogue signal with a frequency of max. 2 GHz. This allows for routing and signal processing of all signals on cost-efficient PCBs. It can therefore be implemented on standard FR4 boards and combined with other IC components for control loops, voltage stabilization, frequency modulation and AD conversion.

Product Details

Article NumberTRA_120_002
Frequency120 GHz
Frequency Range


119.3 GHz / 125.8 GHz
Operation ModeFMCW / CW
Single Supply Voltage3.3 V
Current Consumption128 mA
PackageQFN 32: 5 x 5 mm²
Evaluation Boards / KitsEVALKIT SiRad Easy® r4

Differences between TRX 120_001 and TRA_120_002

The radar antennas of the TRA 120_002 are monolithically integrated on the silicon chip and encapsulated in the housing. To achieve increased directivity, the antennas of the TRX_120_001 were designed as larger patch antennas and integrated in a separate carrier from the circuit within the QFN package. This results in different sizes and performance characteristics of the two radar modules with respect to radiation, beam characteristics and range. These can be further optimized by a combined set-up of the radar ICs with silicon and plastic lenses or reflectors.

Bar Die

These chips are also available as bare die when bought in large quantities.
For more information please contact our sales department.

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