120 GHz RADAR TRANSCEIVER – TRA_120_002

TRAˍ120ˍ002 is an integrated transceiver circuit for the 122-GHz ISM band with antennas on chip. It includes a low-noise amplifier (LNA), quadrature mixers, a poly-phase filter, a voltage controlled oscillator, divide-by-32 outputs, and transmit and receive antennas.

The RF signal from the oscillator is directed to the RX path via buffer circuits. The RX signal is amplified by the LNA and converted to baseband by two mixers with quadrature local oscillator (LO). The 120-GHz LO has four analog tuning inputs with different tuning ranges and tuning slopes. The tuning inputs can be combined to obtain a wide frequency tuning range. The analog tuning inputs together with the integrated frequency divider and external fractional-N PLL can be used for frequency modulated continuous wave (FMCW) radar operation. With fixed oscillator frequency it can be used in continuous wave (CW) mode. Other modulation schemes are possible as well by utilizing analog tuning inputs. The IC is fabricated in SG13S SiGe BiCMOS technology of IHP GmbH

120 GHz RADAR TRANSCEIVER Datasheet

Features of 120 GHz RADAR TRANSCEIVER – TRA_120_002

• Radar front end (RFE) with on-chip antennas for 122-GHz ISM band
• Single supply voltage of 3.3V
• Fully ESD protected device
• Low power consumption of 380mW in continuous operating mode
• Integrated low phase noise push-push VCO
• Receiver with homodyne quadrature mixer
• RX and TX dipole on-chip antennas
• Large bandwidth of up to 7GHz
• QFN32 leadless plastic package 5 × 5mm²
• Pb-free, RoHS compliant package
• IC is available as bare die as well 

Application Of 120 GHz RADAR TRANSCEIVER – TRA_120_002

The main field of application for the 120-GHz transceiver radar frontend (RFE) is in short range radar systems with a range up to about 10meters. By using dielectric lenses, the range can be increased considerably. The RFE can be used in FMCW mode as well as in CW mode. Although the chip is intended for use in the ISM band 122GHz -123GHz, it is also possible to extend the bandwidth to the full tuning range of 7GHz.

The radar chips provide measurement signals for distance and speed measurement of objects as an analogue signal. In comnbination with a subsequent external signal evaluation at customer side, possible applications are the investigation of a 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.

Block Diagram of 120 GHz RADAR TRANSCEIVER – TRA_120_002

• ARTICLE NUMBER: TRA_120_002
• FREQUENCY: 120 GHz
• FREQUENCY RANGE MIN/MAX: 119.3 GHz / 125.8 GHz
• OPERATION MODE: FMCW / CW
• SINGLE SUPPLY VOLTAGE: 3.3 V
• CURRENT CONSUMPTION: 128 mA
• PACKAGE: QFN 32: 5 x 5 mm²
• EVALUATION BOARDS / KITS: EVALKIT SiRad Easy® r4