Abstract: According to one embodiment of the present invention, a directional radar transmitting and receiving system includes: a main control chip is configured to determine whether a pulse wave signal output by a sensor circuit board meets a triggering condition wherein each of a plurality of evaluation processes is satisfied, the evaluation processes including: a first evaluation process including: determining whether a width and an amplitude of the pulse wave signal meets a threshold amplitude; and a second evaluation process including: comparing a shape of the pulse wave signal output by the sensor circuit board with a pre-stored default triggering signal shape; and determining that the second evaluation process is satisfied when the shape of the pulse wave signal matches the pre-stored default triggering signal shape.

Abstract: A sensor board for transmitting and receiving directional radar signals including a non-conductive substrate having a plurality of first recesses distributed at intervals along at least one edge of the non-conductive substrate; a microwave oscillator including an RC oscillator circuit and a transistor Q1; an anti-coupling foil; a first filter circuit configured to filter an input power Vcc; a second filter circuit configured to filter an output signal; a receiving antenna; and a transmitting antenna including a first wire laid over the plurality of first recesses along the edge of the non-conductive substrate; and a plurality of first electrically conductive protrusions embedded in the first recesses, the first wire electrically connecting the first electrically conductive protrusions.

Abstract: A sensor board for transmitting and receiving directional radar signals including a non-conductive substrate having a plurality of first recesses distributed at intervals along at least one edge of the non-conductive substrate; a microwave oscillator including an RC oscillator circuit and a transistor Q1; an anti-coupling foil; a first filter circuit configured to filter an input power Vcc; a second filter circuit configured to filter an output signal; a receiving antenna; and a transmitting antenna including a first wire laid over the plurality of first recesses along the edge of the non-conductive substrate; and a plurality of first electrically conductive protrusions embedded in the first recesses, the first wire electrically connecting the first electrically conductive protrusions.

Abstract: A device for directional radar transmitting and receiving includes a sensor circuit board, including: an integrated microwave oscillator; a first wire mounted on a first face of the sensor circuit board, the first wire being configured to transmit a high-frequency microwave signal, and a second wire mounted on the first face of the sensor circuit board, the second wire being configured to receive a frequency-shifted signal, wherein the frequency-shifted signal is a reflection of the high-frequency microwave signal transmitted by the integrated transmitting antenna; and a main control board mounted facing a second face of the sensor circuit board, the second face of the sensor circuit board being opposite the first face of the sensor circuit board, the main control board being configured to supply the high-frequency microwave signal to the first wire and to process the frequency-shifted signal received by the second wire.

Abstract: According to one embodiment of the present invention, a directional radar transmitting and receiving system includes: a main control chip is configured to determine whether a pulse wave signal output by a sensor circuit board meets a triggering condition wherein each of a plurality of evaluation processes is satisfied, the evaluation processes including: a first evaluation process including: determining whether a width and an amplitude of the pulse wave signal meets a threshold amplitude; and a second evaluation process including: comparing a shape of the pulse wave signal output by the sensor circuit board with a pre-stored default triggering signal shape; and determining that the second evaluation process is satisfied when the shape of the pulse wave signal matches the pre-stored default triggering signal shape.