Integrated Antenna Device with Planar Grounding EMI Shield
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Solution Overview
Problem
In wireless communication devices, separate antennas and EMI shields occupy valuable space on printed circuit boards and require complex cable routing, leading to interference and pattern degradation.
Innovation Solution
An integrated antenna device combining an antenna element and a planar grounding element functioning as an EMI shield, with a tapered connecting element for direct electrical connection to the RF circuit, eliminating the need for separate components and cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate antenna and EMI shield components are used, then EMI shielding function is provided, but device complexity and space occupation increase
Solution Approach 1:
The patent combines the antenna element and EMI shield into a single integrated device where the grounding element serves dual purposes: as part of the antenna structure and as an EMI shielding component. This merging eliminates the need for separate antenna and EMI shield components, reducing device complexity while maintaining both functions.
Solution Approach 2:
The grounding element of the antenna device is designed to perform multiple functions simultaneously: it provides EMI shielding for the RF circuit, serves as part of the antenna's grounding structure, and acts as a reference plane for impedance control. This multi-functionality resolves the contradiction by making one component serve multiple purposes.
2Reliability
If separate antenna and EMI shield components are used, then EMI shielding is provided, but available space on printed circuit board decreases
Solution Approach 1:
By merging the antenna and EMI shield into a single integrated device, the patent reduces the total space occupied on the printed circuit board. Instead of requiring separate mounting areas for both components, the integrated design consolidates their functions into one footprint, thereby increasing available space.
3Reliability
If separate antenna and EMI shield components are used, then EMI shielding is provided, but cable routing becomes complex
Solution Approach 1:
The integration of the antenna element and EMI shield eliminates the need for separate cable connections for each component. The single integrated device requires only one cable connection point, simplifying cable routing and reducing the complexity associated with managing multiple cables and connectors.
4Ease of operation
If antenna is mounted on top cover of PCB, then clearance from highest component is achieved, but cable routing becomes challenging
Solution Approach 1:
By combining the antenna and EMI shield functions into a single device that can be mounted directly on the PCB, the patent eliminates the need for elevated mounting on the top cover. This integration allows the antenna to be positioned closer to other components while maintaining proper clearance through the unified design, and simultaneously simplifies cable routing by reducing the number of connection points.
Data Source
AI summary
An antenna device may include an antenna element, a planar grounding element, a first connecting element, and a second connecting element. The antenna element includes a radiator arm, a shorting arm, and a feeder arm, the shorting arm and the feeder arm being coplanar to and extending from a first edge of the radiator arm, the feeder arm extending parallel to the shorting arm. The first connecting element connects the shorting arm of the antenna element to the planar grounding element to position the antenna element and the planar grounding element in separate parallel planes. The second connecting element extends from and perpendicular to the feeder arm of the antenna element.