NFC Antenna Placement Between Display and PCB
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Solution Overview
Problem
The increasing complexity of electronic devices due to the need to communicate with multiple networks has led to complex circuitry and reduced antenna performance, as prior art designs compromise on size and functionality to separate antennas, degrading performance.
Innovation Solution
The electronic device separates near field communication and wide area network antennas by placing the near field communication circuit antenna between the display and the printed circuit board, allowing for increased antenna size and reduced z-stackup height, enabling improved performance and design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are added to communicate with various networks, then communication functionality is improved, but device complexity increases
Solution Approach 1:
The display structure serves multiple functions: it acts as both a visual output device and as a shielding structure for NFC antenna signals. By making the display conductive or incorporating conductive elements, it provides electromagnetic shielding for the NFC antenna while maintaining its primary display function, thereby reducing the need for separate shielding components and simplifying overall device complexity
Solution Approach 2:
The patent combines the shielding function with the display structure by making the display conductive or incorporating conductive elements within the display layers. This merging of functions eliminates the need for separate shielding components, reducing device complexity while maintaining communication functionality across multiple networks
2Reliability
If antennas are separated to improve performance, then antenna performance is improved, but device thickness increases
Solution Approach 1:
The patent utilizes the z-dimension (thickness direction) to separate the NFC antenna from wide area network antennas by positioning the NFC antenna between the display and printed circuit board, while placing wide area network antennas on the opposite side of the PCB. This vertical separation achieves signal isolation without requiring lateral space, thereby maintaining thin device profile while improving antenna performance
Solution Approach 2:
The NFC antenna is nested within the display assembly structure, positioned between the display and the printed circuit board. This nesting approach allows the antenna to be integrated into the existing device layers without adding external protrusions or significantly increasing overall device thickness, while still achieving the required separation from other antennas for optimal performance
3Reliability
If antenna size is increased to improve performance, then antenna performance is improved, but device area is reduced
Solution Approach 1:
The patent moves the NFC antenna to the z-dimension by positioning it between the display and printed circuit board, allowing it to utilize the vertical space within the device thickness. This enables the antenna to achieve optimal size and radiation pattern without consuming lateral device area, thereby maintaining both high antenna performance and compact device footprint
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 near field communication performance, reduces the overall device thickness, and allows for the use of conductive materials in the rear housing, improving durability and aesthetics while simplifying connectors and eliminating the need for complex shielding.
Implementation Method 1
a near field communication antenna disposed on a first side of the printed circuit board, between the display and the printed circuit board
Data Source
AI summary
An electronic device (200) includes a control circuit (304) disposed on a substrate (220). The control circuit is operable with a display (509), a near field communication circuit (201) and a wide area communication circuit (302). The near field communication circuit is operable with a near field communication circuit antenna (344). The wide area communication circuit is operable with one or more wide area communication circuit antennas (312). In a housing (511) of the electronic device, the substrate separates the near field communication antenna from the battery and the wide area network communication antenna.