Slotted Shield Can Antenna for Compact PCB Layouts
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Solution Overview
Problem
The increasing complexity and slimness of electronic devices lead to insufficient mounting space for antennas and components, causing interference and complicating layout structures, while additional shield cans further reduce available space.
Innovation Solution
A shield can with slits forming radiation regions that operate as antennas, dividing the shield region into internal and external areas, and utilizing meander and patch shapes for different frequency bands, with power feeding regions connected to radiation regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate antenna is mounted on the electronic device, then antenna function is provided, but mounting space becomes insufficient and layout becomes complicated
Solution Approach 1:
The patent combines the antenna function with the shield can structure by forming radiation regions directly on the shield can surface. This integration eliminates the need for separate antenna components and simplifies the overall device layout while maintaining both shielding and antenna functionalities.
Solution Approach 2:
The shield can is designed to serve multiple functions simultaneously: electromagnetic shielding and antenna radiation. By forming radiation regions on the shield can surface, the same structural component performs both protection and signal transmission roles, reducing device complexity.
2Object-affected harmful factors
If a shield can is additionally disposed for shielding electromagnetic waves, then electromagnetic interference is reduced, but mounting space becomes more insufficient
Solution Approach 1:
The antenna radiation regions are formed directly on the shield can surface, merging the shielding function and antenna function into a single component. This eliminates the need for additional space that would be required for separate antenna mounting while maintaining electromagnetic shielding effectiveness.
3Area of stationary object
If the shield can operates as an antenna with slits forming radiation regions, then mounting space is minimized, but the shield can structure becomes more complex
Solution Approach 1:
The shield can surface is segmented into multiple radiation regions separated by slits. This segmentation allows different regions to resonate at different frequency bands, enabling multi-band antenna functionality while maintaining a relatively simple overall shield can structure.
Solution Approach 2:
Different portions of the shield can surface are given different local characteristics through the formation of specific radiation regions with distinct geometries. These localized variations enable resonance at different frequency bands while the overall shield can structure remains simple and integrated.
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 shield can functions as an antenna, minimizing mounting space and reducing costs by eliminating the need for separate antennas, allowing for a slimmer and more compact electronic device design.
Implementation Method 1
a first radiation region that is the first internal region divided by the first slit... The first radiation region may have one of a meander line shape and a patch shape... resonates in a first frequency band
Data Source
AI summary
Disclosed is a shield can for operating as an antenna while blocking electromagnetic waves by defining a radiation region resonating in one or more frequency bands according to the formation of slots. The disclosed shield can arranged on a printed circuit board to cover electronic components mounted on the printed circuit board comprises: a first slit formed in the shield can to divide the shield can into a first inner region and a first outer region spaced from the first inner region; a shielding region, which is the first outer region divided by means of the first slit; and a first radiation region which is the first inner region divided by means of the first slit.