Sensor Module Parasitic Metal Member Resonance
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Solution Overview
Problem
Conventional microstrip antennas are not designed to incorporate sensors effectively, lacking favorable radiation characteristics for sensor modules.
Innovation Solution
A sensor module design featuring a metal member with a recessed portion and resin portion, where the metal member functions as a parasitic element due to an annular or polygonal slit, enhancing radiation characteristics by resonating radio waves emitted from a radiator within the resin portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional microstrip antenna structure is used, then the antenna can radiate radio waves, but it lacks favorable radiation characteristics when a sensor is incorporated into the module
Solution Approach 1:
The patent combines the antenna radiator, sensor, and metal member with parasitic element function into a single integrated sensor module. The metal member is positioned to interact electromagnetically with the radiator while the sensor is mounted on the same structure, achieving both radiation functionality and sensor integration in one compact design.
Solution Approach 2:
The metal member serves multiple functions: it acts as a parasitic element to enhance radiation characteristics, provides structural support for mounting the sensor, and forms part of the overall antenna assembly. This multi-functionality resolves the contradiction by enabling both good radiation performance and sensor incorporation capability through a single component.
2Reliability
If the metal member is placed close to the radiator to enhance radiation characteristics, then radiation performance improves, but electrical interference or short circuit risks increase
Solution Approach 1:
The resin material serves as an intermediary between the metal member and the radiator. It provides electrical insulation to prevent short circuits and reduce electromagnetic interference, while still allowing the metal member to function as a parasitic element that enhances radiation characteristics through its proximity to the radiator.
Solution Approach 2:
The resin material is strategically placed only in the critical areas where electrical insulation is needed between the metal member and radiator, rather than uniformly throughout the entire structure. This localized approach maintains good radiation characteristics by allowing close proximity while preventing electrical interference at specific points.
3Reliability
If a complex structure is designed to achieve favorable radiation characteristics, then radiation performance improves, but manufacturing difficulty increases
Solution Approach 1:
The patent merges multiple functions into fewer components: the metal member provides both structural support and parasitic element functionality, the resin serves as both insulation and mounting medium, and the sensor is mounted directly on the integrated structure. This reduction in component count and assembly steps simplifies manufacturing while maintaining favorable radiation characteristics.
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 sensor module achieves favorable radiation characteristics and easy manufacturing, with improved resonance and directivity, enabling effective wireless communication and sensor functionality.
Implementation Method 1
the metal member is insulated from the radiator by the resin portion and functions as a parasitic element
Implementation Method 2
a radiator provided within the resin portion and configured to emit radio waves
Data Source
Figure 1
Figure 2
Figure 3A~3D
AI summary
A sensor module includes: a metal member having a recessed portion; a resin portion embedded within the recessed portion; a radiator provided within the resin portion and configured to emit radio waves; a wireless communication portion provided within the resin portion and connected to the radiator; and a sensor connected to the wireless communication portion, wherein the metal member is insulated from the radiator by the resin portion and functions as a parasitic element.