Dielectric Case Antenna Unit Integrating Substrate
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Solution Overview
Problem
Existing antenna units face challenges in assembling antennas within a housing effectively, particularly in maintaining optimal thickness and dielectric properties to achieve proper antenna gain and voltage standing wave ratio (VSWR) while minimizing the number of parts and manufacturing costs.
Innovation Solution
The antenna unit incorporates a case with dielectric properties, where a patch antenna and microstripline are assembled, with the antenna pattern on the inner surface and ground pattern on the outer surface of the case, allowing the case's wall to function as a dielectric body, eliminating the need for a substrate and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate substrate is used to form the antenna pattern and ground pattern, then the antenna structure is complete and functional, but the number of parts increases and manufacturing complexity increases
Solution Approach 1:
The patent merges the substrate and the case into a single integrated structure. The case itself is formed with dielectric properties and serves as the substrate for mounting the antenna pattern and ground pattern, eliminating the need for a separate substrate component. This integration reduces the number of parts while maintaining antenna functionality.
Solution Approach 2:
The case serves multiple functions: it provides mechanical protection, acts as the dielectric substrate for the antenna, and forms part of the antenna structure itself. By making the case multi-functional, the patent eliminates the need for dedicated substrate components, thereby reducing part count and manufacturing complexity.
2Reliability
If multiple separate components (substrate, antenna pattern, ground pattern) are assembled, then the antenna can be properly constructed, but the manufacturing process becomes more complex and costly
Solution Approach 1:
The patent combines the substrate function and case function into a single molded component. The antenna pattern and ground pattern are formed directly on the case during the molding process, eliminating separate assembly steps for attaching a substrate and its patterns. This integration simplifies the manufacturing process and reduces costs.
Solution Approach 2:
The antenna pattern and ground pattern are pre-formed as integral parts of the case during the molding process, before the antenna assembly takes place. This preliminary formation of conductive patterns during case manufacturing eliminates subsequent assembly steps, thereby simplifying the overall manufacturing process.
3Reliability
If the case wall thickness is optimized for antenna performance, then VSWR and gain are improved, but the case design becomes more constrained
Solution Approach 1:
The patent optimizes the case wall thickness as a critical parameter for antenna performance. By carefully controlling the thickness of the case wall that serves as the dielectric substrate, the patent achieves optimal VSWR and gain characteristics. This parameter optimization is integrated into the case design process, allowing performance tuning without adding separate components.
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
This configuration enhances antenna gain, reduces manufacturing costs, and improves assembly efficiency by utilizing the case's thickness to optimize VSWR and circularly polarized wave gain, while minimizing the number of parts and manufacturing processes.
Implementation Method 1
a case (10) having dielectricity; an antenna pattern (32) provided on an inner wall surface (12a) of a wall portion of the case (10); a first ground pattern (33) formed on an outer wall surface (12b) of the wall portion of the case (10) so as to face the antenna pattern (32)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An antenna unit includes a patch antenna (30) and a case. The patch antenna (30) includes a conductive antenna pattern (32) and an antenna ground pattern (33) that functions as ground of the antenna pattern (32) and receives an electric wave. The case has dielectricity, the case being provided with the patch antenna (30). The antenna pattern (32) is provided on an inner wall surface (12a) of a wall portion of the case. The antenna ground pattern (33) is provided on an outer wall surface (12b) of a wall portion of the case (10) and is positioned so as to face the antenna pattern (32).