The CAL77A2T4R from Calterah Semiconductor Technology is a Automotive Radar Chipset with Frequency 76 to 81 GHz, Gain 46 to 82 dB, Tx power 12 dBm, Noise Figure 12 dB, Current 40 to 350 mA. Tags: Surface Mount, Transceiver. More details for CAL77A2T4R can be seen below.