A compact 24 GHz quadrature Doppler radar with front-end MMIC |
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| Authors: | Choul-Young Kim Songcheol Hong |
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| Affiliation: | 1. Electronics Engineering, Chungnam National University , Daejeon , Republic of Korea cykim@cnu.ac.kr;3. Department of Electrical Engineering , Korea Advanced Institute of Science and Technology , Daejeon , Republic of Korea;4. Department of and Computer Science , Korea Advanced Institute of Science and Technology , Daejeon , Republic of Korea |
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| Abstract: | A compact 24?GHz quadrature Doppler radar front-end monolithic microwave integrated circuit (MMIC) with Tx leakage canceller is developed. The chip is 3?×?2?mm2 and the front-end module is 3?×?3?cm2. The MMIC consists of a 24?GHz voltage-controlled oscillator, a Tx leakage canceller and two mixers. The radar module can measure speeds as low as 2.5?mm/s, which corresponds to a 0.41?Hz Doppler shift. The quadrature topology enables the signs of a Doppler shift to be detected and obviates the null point problems. |
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| Keywords: | GaAs MMIC microwave sensors RF front-ends velocity Doppler radar |
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