5.8 GHz single transistor microwave motion sensor

Abstract

The invention discloses a 5.8 GHz single transistor microwave motion sensor. The 5.8 GHz single transistor microwave motion sensor includes a circuit board and a microwave movement sensor circuit disposed on the circuit board, wherein the microwave sensor circuit includes an oscillating mixing unit and a signal transceiver unit, the oscillating mixing unit and the signal transceiver unit are respectively disposed on a circuit layer and an antenna layer of the multi-layer circuit board, the oscillating mixing unit is a triode, the signal transceiver unit is a microstrip transceiver antenna, thetriode is disposed on the circuit layer, and the microstrip transceiver antenna is disposed on the antenna layer. The 5.8 GHz single transistor microwave motion sensor is advantaged in that one transistor is utilized to complete signal transmission, reception and frequency conversion, functions of a traditional 5.8 GHz microwave motion sensor needing more than two transistors are achieved, the single microstrip antenna is utilized to form signal transmission and reception, the circuit is made to be more simplified, cost is lower, and the 5.8 GHz single transistor microwave motion sensor is easy to promote and apply.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a 5.8GHz single-transistor microwave mobile sensor. Background technique [0002] The microwave motion sensor is a Doppler effect transceiver module using a dielectric resonator oscillator and a microstrip patch antenna technology to achieve low current consumption, high temperature stability, high sensitivity and flat shape, and is an ideal low-cost motion detector. A wide range of infrared + microwave double-detection detectors, microwave infrared motion detectors, automatic door sensors, light control switches, anti-theft alarms, etc., are usually used in anti-theft systems. The composition ratio of this module and infrared sensors can effectively reduce false alarms . Microwave is an electromagnetic wave with a wavelength of 1 to 1000 mm. It has the properties of electromagnetic waves and is different from ordinary radio waves and light waves. Compared with electromagnetic ...

AI Technical Summary

Problems solved by technology

[0003] With the development of smart home technology and security technology, microwave mobile sensors are more and more used in the field of smart home technology and security technology. Microwave mobile sensors are used in smart homes to detect moving objects. In smart homes, generally 5.8 The mobile object detection sensor in the GHzISM frequency band, however, most of the 5.8GHz microwave mobile sensors in the market currently have the following problems: the traditional 5.8GHz microwave mobile sensor requires a transistor for microwave signal generation and a diode for a mixing circuit, This solution has the problems of complex circuit structure and high production cost. Moreover, with the demand for miniaturization of electronic products, how to reduce the volume and simplify the structure of mobile microwave sensors has become a technical problem that needs to be solved urgently.

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