Antenna Module with Vertical Radiation Pattern on Shielding Sheet
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing NFC antenna modules face challenges in implementing effective radiation patterns when integrated into portable devices with metal back covers, as the metal material shields the signal, complicating manufacturing and design, especially in achieving performance in both plane and vertical directions.
Innovation Solution
The antenna module features a radiation pattern alternately formed on the upper and lower surfaces of a shielding sheet wound in a vertical direction, allowing for effective signal formation and minimization of performance deviation across various angles, even with metal back covers, by using a shielding sheet with coils connected in a specific configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal back cover is used in a portable device, then the appearance and durability are improved, but the antenna module performance deteriorates due to signal shielding
Solution Approach 1:
A shielding sheet is introduced as an intermediary component between the antenna module and the metal back cover. This shielding sheet has a radiation pattern wound around it in a vertical direction, creating a magnetic field that counteracts the shielding effect of the metal cover, thereby maintaining antenna performance while allowing the metal cover to be used for durability and appearance
Solution Approach 2:
The invention changes the orientation parameter of the radiation pattern from the conventional horizontal direction to a vertical direction. By winding the radiation pattern around the shielding sheet in the vertical direction (along the thickness direction of the metal cover), the magnetic field is generated perpendicular to the metal cover surface, effectively counteracting the shielding effect and enabling the metal cover to be used without compromising antenna performance
2Reliability
If slits or openings are formed in the metal back cover to improve antenna performance, then the antenna module performance is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
Instead of modifying the metal back cover by adding slits or openings, a shielding sheet with a vertically wound radiation pattern is introduced as an intermediary component. This approach maintains the integrity of the metal cover while effectively counteracting its shielding effect through the generated magnetic field, thereby improving antenna performance without increasing manufacturing complexity
Solution Approach 2:
The invention extracts the antenna performance improvement function from the metal back cover itself and transfers it to a separate shielding sheet component. This allows the metal cover to remain intact without requiring slits or openings, while the shielding sheet independently provides the necessary magnetic field to counteract shielding effects
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 ensures equivalent or superior antenna performance to modules without metal covers, maintaining functionality in both plane and vertical directions while simplifying design and manufacturing, maximizing productivity and user convenience for near field communication and electronic payments.
Implementation Method 1
a radiation pattern alternately formed on an upper surface and a lower surface of the shielding sheet to be wound on the shielding sheet in a vertical direction
Implementation Method 2
since current flows in the back cover 10 in an opposite direction to the antenna module 20 to perform a shielding function of attenuating a signal of the antenna module 20
Data Source
AI summary
The present invention suggests an antenna module in which a radiation pattern is alternately formed on an upper surface and a lower surface of a shielding sheet to be wound on the shielding sheet in a vertical direction, and a portable device having the same. In the suggested antenna module, the radiation pattern is alternately formed on the upper surface and the lower surface of the shielding sheet in the vertical direction of the shielding sheet, and the portable device comprises the antenna module having a radiation pattern formed along a short side direction of a back cover formed of a metal material, and mounted to be biased from the center of the back cover to the short side direction.