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A new 77GHz single-chip radar sensor has been developed, which encapsulates a GaAs p-HEMT transceiver MMIC with an on-chip patch antenna in a resin-molded package integrated with a resin collimating lens on the top to achieve an EIRP of 13.5dBm and a receiving gain of 8dB. The packaged sensor, measuring 6.5x4.4x6.0mm 3 with only DC and basebandfrequency leads, offers ease of handling with an extreme low-cost potential for a variety of applications. When adopted to an automotive ground speedometer integrated with an signal processing unit, the sensor demonstrated accurate and reliable detections of vehicle speed with a standard deviation of 1.5% under normal driving conditions.

9 In this letter, a novel current-mode operational amplifier (COA) is proposed. The proposed COA can operate at 2 V (4-1 V) supply voltage. For high frequency operation it has only an npn transistor in signal path. Finally, SPICE simulation are shown to verify the performance of the proposed COA.

A 24GHz Intruder detection radar with three vertically-switched-beam antennas has been developed to cover a fan-shaped ground area with 90 degs. in azimuth and 0 to over 14m in range, when mounted at a height of 5m. Each switched beam monitors a different range segment with a monopulse scheme employed to achieve the wide azimuth coverage. An experimental radar with a Tx/Rx module fully assembled with MMIC's successfully detected a human intruder with a position accuracy of 50cm when moving at 1.4m/s.