External Antenna System in Device Cover for Signal Enhancement
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Solution Overview
Problem
Current antenna designs in wireless communication devices are inadequate for covering large frequency bands efficiently, leading to degraded performance due to size constraints and the need for improved connectivity in cellular and data transmission bands, especially with the advent of 4G systems and MIMO requirements.
Innovation Solution
An external antenna system integrated into a device cover, utilizing multiple conductive layers and active components within a plastic housing, which couples with internal antennas to enhance signal reception and transmission without increasing device volume, including features like solar cells and additional batteries for power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional and/or larger antennas are required to meet multi-application demands, then antenna performance and coverage are improved, but device size and volume increase
Solution Approach 1:
The patent extends the antenna system from the internal device space into the external cover space. The cover accessory serves as a third dimension for antenna placement, allowing additional antenna elements to be positioned outside the main device body without increasing the device's core volume. This resolves the contradiction by utilizing external space for enhanced antenna performance.
Solution Approach 2:
The antenna system is nested within the cover accessory, which itself attaches to the wireless device. The cover houses multiple antenna elements and conductive structures that are integrated into its structure, creating a nested configuration where the antenna system is contained within the cover rather than requiring separate space within the device body.
2Volume of moving object
If multiple electrically small antennas are embedded in a small wireless device, then device portability is maintained, but antenna coupling occurs and performance degrades
Solution Approach 1:
The patent extracts antenna elements from the constrained internal device space and places them in the external cover space. By taking out antenna elements from the small device body and relocating them to the larger external cover, the patent eliminates harmful coupling between closely spaced antennas while maintaining device portability.
Solution Approach 2:
The patent uses the cover accessory as an external dimension for antenna placement. By moving antenna elements from the internal three-dimensional space to the external surface and structure of the cover, the patent increases the effective spacing between antenna elements without increasing the device's core volume, thereby reducing coupling effects.
3Adaptability or versatility
If antenna volume is increased to cover large frequency bands efficiently, then frequency coverage is improved, but device bulk and size increase
Solution Approach 1:
The patent utilizes the cover accessory as external space to accommodate larger antenna structures and multiple antenna elements required for wide frequency coverage. By placing these volume-intensive antenna components in the external cover rather than within the device body, the patent achieves broad frequency adaptability without increasing device bulk.
Solution Approach 2:
The cover accessory serves multiple functions: it provides structural protection for the device, houses multiple antenna elements for wide frequency coverage, and contains conductive structures for signal transmission. This multi-functionality allows the cover to support enhanced frequency adaptability without requiring additional dedicated space within the device.
4Volume of moving object
If internal antenna space is reduced to meet portability requirements, then device portability is improved, but antenna performance and connectivity degrade
Solution Approach 1:
The patent extracts antenna functions from the internal device space and relocates them to the external cover. By taking out antenna elements and their supporting structures from the limited internal space, the patent maintains compact device size while preserving and even enhancing antenna performance for high-speed data transmission.
Solution Approach 2:
The cover accessory acts as an intermediary structure that bridges the gap between the device's internal antenna space constraints and the external requirements for high-performance connectivity. The cover houses additional antenna elements and conductive structures that supplement the internal antenna system, enabling high data rates without requiring more internal space.
Data Source
AI summary
An antenna system is integrated into a cover or accessory and adapted to couple to an antenna in a host device to improve transmission and reception of signals. The antenna system can be passive or active, with the active antenna system designed to amplify coupled signals on the integrated antenna elements in the cover or accessory. Single or multiple frequency bands can be improved with the integrated antenna system, and multiple antennas in the host device can be coupled to and improved. The antenna system can couple to the existing antennas in the host device by capacitive coupling, i.e. no physical contact required, or a connector can be designed into the cover or accessory containing the integrated antenna system that makes contact to electrical ground of the host device or power supply signals or other control signals.