Microwave Doppler Module with Antithetical Dipoles for Dead-Zone Reduction
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Solution Overview
Problem
Conventional microwave-doppler detection modules with columnar and flat radiation source structures suffer from detection dead zones and limited applicability due to their structural limitations, which affect the stability and effectiveness of human activity detection, especially when mounted on LED light boards.
Innovation Solution
A microwave-doppler detecting module with an antithetical coupling structure comprising a pair of dipoles and an electromagnetic reflecting surface, allowing for directional radiation and reduced detection dead zones, enhancing stability and applicability by minimizing the projection area and optimizing the radiation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a columnar radiation source structure is used, then the radiation space coverage is improved, but detection dead zones are created at the ends of the columnar source
Solution Approach 1:
The patent divides the single columnar radiation source into multiple columnar radiation sources arranged in an array. Each columnar source creates its own radiation space, and the combined effect eliminates the dead zones that would exist with a single source, while maintaining the beneficial coverage characteristics of the columnar geometry.
Solution Approach 2:
The patent combines multiple columnar radiation sources into a unified array structure where their radiation spaces overlap and complement each other. This merging of multiple radiation fields eliminates the detection dead zones that characterize single-source systems while preserving the extended coverage area.
2Reliability
If the microwave detection module is mounted lower to reduce detection dead zones, then the detection coverage is improved, but the mounting space requirement increases
Solution Approach 1:
By segmenting the radiation source into multiple columnar elements arranged vertically, the system achieves improved detection coverage without requiring the entire assembly to be mounted lower. The segmented structure allows each element to contribute to eliminating dead zones while maintaining a compact overall mounting footprint.
Solution Approach 2:
The patent transitions from a single-point mounting solution to a distributed array structure that utilizes vertical spacing between multiple columnar sources. This dimensional redistribution allows the system to eliminate dead zones through spatial distribution rather than through lower mounting height, thereby reducing the required mounting space.
3Volume of stationary object
If a flat panel radiation source structure is used, then the mounting space is reduced, but detection dead zones still occur and gain is limited
Solution Approach 1:
The patent segments the flat panel structure into multiple columnar radiation sources arranged in an array. This segmentation preserves the compact mounting footprint of flat panel designs while introducing the vertical dimension needed to eliminate detection dead zones, achieving both space efficiency and detection reliability.
Solution Approach 2:
The patent creates a composite structure that combines the space-efficient flat panel geometry with the dead-zone-eliminating columnar source characteristics. This composite design integrates multiple columnar sources within a compact array configuration, achieving both reduced mounting space and improved detection coverage without dead zones.
4Reliability
If the columnar radiation source penetrates the reference ground surface, then coupling with the ground surface is improved, but the structure occupies more mounting space
Solution Approach 1:
The patent divides the penetrating columnar source into multiple smaller columnar sources arranged in an array. Each source maintains the beneficial ground surface coupling of the penetrating design, while the distributed array configuration reduces the overall mounting space requirement compared to a single large penetrating source.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The antithetical coupling structure improves the stability and applicability of the microwave-doppler detecting module by reducing detection dead zones and enhancing directional detection, suitable for various scenarios including LED light boards without compromising the LED light emission.
Implementation Method 1
the first radiating source pole from the first feed end along the first radiating source pole is correspondingly coupled to the corresponding positions of the second radiating source pole from the second feed end along the second radiating source pole, so as to form the antithetical coupling arrangement between the first radiating source pole and the second radiating source pole
Implementation Method 2
an electromagnetic reflecting surface, wherein the antithetical dipoles are arranged spacingly to the electromagnetic reflecting surface in the space corresponding to the electromagnetic reflecting surface
Implementation Method 3
Microwave detection technologies based on Doppler Effect, are utilized as a critical key in detecting and relating humans and objects
Data Source
AI summary
A microwave-doppler detecting module and device thereof are provided, wherein the microwave-doppler detecting module includes an electromagnetic reflecting surface and at least a pair of antithetical dipoles spacingly disposed to the electromagnetic reflecting surface. When the first and second radiating source poles respectively extended from a first and second feed ends of the pair of antithetical dipoles are respectively fed by the same excitation signal feed source at the first feed end and the second feed end, the current and the potential distribution of the first radiating source pole and the second radiating source pole can present an antithetical distribution state and antithetically coupled to the midpoint of the connection of the first feed end and the second feed end, so as to reduce the size requirement of the microwave-doppler detecting module and to avoid detection dead zone from occurring.