Embedded Antenna Resonating Elements in Substrate
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Solution Overview
Problem
There is a challenge in designing compact wireless circuitry for electronic devices that maintains efficient antenna performance across a wide range of frequencies while minimizing interference with other components and ensuring satisfactory performance in small form factor devices.
Innovation Solution
The solution involves embedding antenna resonating elements within the substrate of electronic devices, such as a wristwatch, with support structures and coil structures surrounding the backside circuitry module, allowing antennas to radiate through the rear housing wall, and using multiple antenna elements to cover different frequency bands efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antenna volume is increased to improve efficiency and bandwidth, then antenna performance is improved, but device form factor increases
Solution Approach 1:
The antenna resonating elements are embedded within the substrate, nesting the antenna structure inside the existing device housing rather than adding external antenna components. This allows the antenna to occupy space already allocated for other components, achieving improved antenna efficiency without increasing overall device volume.
Solution Approach 2:
The patent utilizes the third dimension by embedding antenna elements within the substrate thickness and using multiple layers (first and second antenna resonating elements on opposing sides). This vertical stacking approach increases effective antenna volume without expanding the device's footprint area.
2Adaptability or versatility
If multiple antenna components are incorporated to cover wide frequency ranges, then frequency coverage is improved, but interference between components increases
Solution Approach 1:
The patent combines multiple antenna resonating elements (first and second elements on opposing sides of the substrate) into a single integrated antenna system. This merging approach allows wide frequency coverage through multiple elements while the shared substrate and aperture structure reduce interference compared to separate antenna components.
Solution Approach 2:
The substrate acts as an intermediary structure that hosts the antenna resonating elements and provides electromagnetic isolation between them. The support structures and aperture definitions further mediate the electromagnetic environment, reducing interference between multiple antenna elements while maintaining their individual frequency coverage capabilities.
3Volume of moving object
If antenna structures are integrated into compact device housing, then device compactness is improved, but antenna performance deteriorates
Solution Approach 1:
The patent creates localized optimal conditions for antenna performance by defining specific apertures in the support structures and rear housing wall through which the antenna elements radiate. This local quality approach ensures that despite the compact overall device size, the antenna has dedicated radiation paths and optimized electromagnetic environments at critical locations.
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 antenna efficiency, particularly at high frequencies, while maintaining a compact device size and reducing interference, enabling reliable wireless communications across various frequency bands.
Implementation Method 1
The first and second antenna resonating elements may be coupled to radio-frequency transceiver circuitry such as near-field communications transceiver circuitry operable to convey radio-frequency antenna signals above 10 GHz through the first and second antenna apertures and the rear housing wall using the first and second antenna resonating elements
Data Source
AI summary
An electronic device may include a display formed at a front face and a backside circuitry module formed at a rear face that opposes the front face. The backside circuitry module may be surrounded by coil structures and may be aligned with a protrusion in a rear wall housing at the rear face. The backside circuitry module may include a substrate to which sensor components or other components may be mounted. In particular, sensor circuitry, sensors, transceiver circuitry, connector circuitry, etc. may be mounted to the substrate. Antenna structures may be embedded within the substrate along with conductive paths for the sensor components and other components mounted to the substrate. Support structures in the backside circuitry module may support the substrate, sensor components, and other components. If desired, antenna structures may be formed on the support structures.