| 摘要 |
<p>The present invention relates to a short-range motion detecting device and, more specifically, to a short-range motion detecting device capable of stably generating signals to detect motions and at the same time accurately detecting motions of an object in a short range. According to an embodiment of the present invention, the short-range motion detecting device is able to perform roles of an oscillator and a mixer with a simpler structure than a single antenna or existing Doppler sensors, so the device is able to integrate high-frequency circuits and stably generate signals to detect motions. At the same time, the device has a simple filtering structure and is strong against noise, thereby accurately detecting motions at lower costs than existing Doppler sensors and accordingly providing the optimum characteristics as a sensor to detect the motion of an object within a 1-meter range. As a result, costs and the size can be significantly reduced.</p> |
