TRX_120_089

The TRXˍ120ˍ089 is an integrated transceiver circuit for the 122-GHz ISM band with antennas in package. The IC comprises an integrated VCO, a frequency divider, a gain-controlled power amplifier, a gain-controlled low-noise amplifier, a quadrature mixer, a poly-phase filter, as well as transmit and receive antennas. The VCO frequency can be tuned by two analog inputs – Vfine and Vcoarse. These two tuning inputs combined can be used to obtain the full tuning range of greater than 6GHz. The RF signal from the oscillator is directed to the RX and TX paths via a local oscillator (LO) amplifier followed by a power divider. The RX signal is amplified by an LNA and converted to baseband by a quadrature mixer.

The on-chip VCO, together with the integrated frequency divider and external fractional-N PLL, can be used for frequency-modulated continuous wave (FMCW) radar operation. With a fixed oscillator frequency, it can be used in continuous wave (CW) mode. Other modulation schemes, such as FSK, can be implemented by utilizing the analog tuning inputs