Wireless Device Aperture Segmentation for Antenna Gain
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Solution Overview
Problem
Conventional semiconductor packages with antennas suffer from decreased antenna gain due to diffraction waves at the edge of conductive resin films, which affects radiation patterns and electromagnetic wave transmission, especially as device size and frequency increase.
Innovation Solution
The implementation of multiple apertures in a conductive film, where at least one aperture is powered and others act as parasitic elements, to reduce the strength of diffraction waves and enhance antenna characteristics by improving radiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single aperture is formed in the conductive resin film for antenna radiation, then the shielding function is maintained, but diffraction waves occur at the edge portions which degrade antenna gain
Solution Approach 1:
The single aperture is divided into multiple apertures (first aperture and second aperture) in the conductive resin film. This segmentation allows the diffraction waves from edge portions to be reduced while maintaining the shielding function, thereby improving antenna gain without sacrificing reliability.
2Volume of moving object
If the package size is reduced to miniaturize the device, then portability is improved, but diffraction wave effects become more significant degrading antenna performance
Solution Approach 1:
By segmenting the aperture into multiple smaller apertures, the patent achieves effective diffraction wave suppression even in miniaturized packages. The multiple apertures distribute the radiation function while reducing edge diffraction effects, maintaining antenna characteristics despite reduced package size.
Solution Approach 2:
The patent applies different functions to different portions of the conductive resin film: the first aperture serves as the main radiation element while the second aperture functions as a parasitic element to suppress diffraction waves. This local differentiation optimizes antenna performance in compact packages.
3Speed
If the frequency of the electromagnetic wave is increased to improve data transmission speed, then communication efficiency is improved, but diffraction wave effects are amplified degrading radiation patterns
Solution Approach 1:
The segmentation of the aperture into multiple apertures effectively suppresses diffraction waves that become more pronounced at higher frequencies. This maintains stable radiation patterns and reliable data transmission even when operating at elevated frequencies for improved communication speed.
Solution Approach 2:
The second aperture acts as an intermediary parasitic element that mediates the electromagnetic field distribution, suppressing diffraction waves and stabilizing radiation patterns at higher frequencies, thereby enabling reliable high-speed communication.
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 approach effectively suppresses the disturbance of radiation patterns by electromagnetic waves, leading to improved antenna performance and reduced leakage of undesired electromagnetic waves, thereby enhancing the overall efficiency of electromagnetic wave transmission and reception.
Implementation Method 1
at least one aperture of the plurality of apertures is fed with power
Implementation Method 2
a diffraction wave occurring in an edge portion of the conductive resin film degrades an antenna gain
Data Source
AI summary
According to one embodiment, a wireless device includes a circuit board, a semiconductor chip, a nonconductive layer, and a conductive film. The semiconductor chip includes a transmitting/receiving circuit and is mounted on the circuit board. The nonconductive layer is to seal the semiconductor chip. The conductive film is to cover a surface of the nonconductive layer, the conductive film being provided with a plurality of apertures serving as radiating elements. At least one aperture of the plurality of apertures is fed with power.