High-gain microwave Doppler detection module

Abstract

The invention provides a high-gain microwave Doppler detection module. The high-gain microwave Doppler detection module comprises an electromagnetic reflecting surface and at least one pair of dual coupling poles which are arranged at intervals with the electromagnetic reflecting surface; one pair of dual coupling poles is provided with a first feed end and a second feed end; a first radiation source electrode and a second radiation source electrode respectively extend from the two feed ends; the first feed end and the second feed end are close to each other; when the first radiation source electrode and the second radiation source electrode are respectively fed by the same excitation signal feed source at the corresponding feed ends, current and potential distribution of the first radiation source electrode and the second radiation source electrode can be coupled in a dual mode with the midpoint of the connecting line of the first feed end and the second feed end in a dual distribution state. The requirement for the size of the high-gain microwave Doppler detection module is lowered, and a detection dead zone can be prevented from being formed.

Description

technical field [0001] The invention relates to the field of microwave Doppler detection, in particular to a high-gain microwave Doppler detection module. Background technique [0002] Microwave detection technology based on the principle of Doppler effect, as an important link between people and things, and between things and things, has unique advantages in behavior detection and presence detection technology. out of moving objects, so it has a wide range of application prospects. [0003] According to the structure of the radiation source, the existing microwave detection module is mainly divided into a microwave detection module with a columnar radiation source structure and a microwave detection module with a flat radiation source structure. Specifically, refer to the accompanying drawings of the present invention Figure 1A and Figure 1B As shown, the structural principles of the existing microwave detection module 10P of the columnar radiation source structure and t...

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Problems solved by technology

However, in actual use, limited by the thinnest extreme value of the thickness of the LED lamp panel 30P and the largest extreme value of the size of the through hole 32P, the columnar radiation source 11P of the microwave detection module 10P with the columnar radiation source structure and the The coupling between the reference ground 12P will be blocked by the LED lamp board 30P, that is, the corresponding radiation space 100P located on the light emitting surface of the LED lamp board 30 will be reduced due to the shielding and reflection of the LED lamp board 30P, so The microwave detection module 10P with columnar radiation source structure applied to the LED light board 30P is not stable in the detection of human activities.

And due to the directivity of the bidirectional radiation of the microwave detection module 10P of the columnar radiation source structure and the reflection effect of the LED lamp board 30P, the corresponding radiation space 100P located on the surface of the LED lamp board 30P opposite to the light-emitting surface will be covered by Enhanced, that is, the radiation energy of the microwave detection module 10P of the columnar radiation source structure on the surface of the LED lamp panel 30P opposite to the light emitting surface is enhanced, so that the radiation energy on the surface of the LED lamp panel 30P opposite to the light emitting surface corresponds to When there is a metal object in the space, such as the metal shell of the LED lamp panel 30P or the metal pipe in the ceiling space, the microwave detection module 10P of the columnar radiation source structure is likely to be mistaken for a moving object due to the principle of self-excitation, thereby affecting The detection experience of the intelligent control of the LED light panel 30P

[0006] That is to say, the microwave detection module 10P of the existing columnar radiation source structure has a low gain, and due to the existence of the radiation dead zone, the detection distance of the existing microwave detection module 10P of the columnar radiation source structure in actual use is long Less than the detection distance matching its gain size

In addition, relative to the microwave detection module 20P of the planar radiation source structure, the microwave detection module 10P of the columnar radiation source structure can extend the columnar radiation source 11P to The other side of the metal plate corresponds to the space outside the shielded space, thereby breaking through the shielded space to realize the activity detection of the space outside the shielded space, but its detection stability is not ideal

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