Integrated Antenna Array Isolator for RF Coupling Reduction
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Solution Overview
Problem
The decreasing available volume in communication devices leads to increased coupling between antennas operating in similar frequency ranges, reducing performance, and isolators used to mitigate this occupy valuable space.
Innovation Solution
An integrated isolating antenna array component with an interconnection substrate and an isolator connected to electrical ground is positioned between two antennas, reducing coupling by geometrically aligning radiofrequency nulls and canceling edge currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distance between two antennas is reduced to fit more components in the device, then the available volume is optimized, but the coupling between antennas increases and performance deteriorates
Solution Approach 1:
An isolating antenna array component is introduced as an intermediary element positioned between the two antennas. This component includes radiating elements that are driven at a second frequency range higher than the first frequency range, creating electromagnetic interference that reduces coupling between the antennas operating in the first frequency range. The isolator affixed to the interconnection substrate and connected to electrical ground further enhances the isolation effect, allowing the antennas to be placed closer together without performance degradation.
2Reliability
If an isolator is added to reduce coupling between antennas, then antenna performance is improved, but the device occupies more volume
Solution Approach 1:
The isolating antenna array component merges multiple functions into a single integrated structure. The antenna array provides both its primary function of operating in the second frequency range and the additional function of isolating the first frequency range antennas through its radiating elements. The isolator is integrated onto the same interconnection substrate, combining isolation functionality with the existing antenna support structure. This integration eliminates the need for separate isolator components, reducing overall device volume while maintaining antenna performance.
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
Effectively reduces radiofrequency coupling between antennas while minimizing space usage by utilizing an isolating antenna array component with an integrated isolator.
Implementation Method 1
The antenna array is configured to drive the one or more radiating elements within a second frequency range in the communication device. The second frequency range is higher than the first frequency range.
Implementation Method 2
The isolator is configured to reduce the radiofrequency coupling between the two antennas within the first frequency range.
Data Source
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AI summary
A communication device includes two antennas operational within a first frequency range in the communication device. An integrated isolating antenna array component is positioned between the two antennas in the communication device to reduce radiofrequency coupling between the two antennas. The integrated isolating antenna array component includes an interconnection substrate and an antenna array adjacent to the interconnection substrate and including one or more radiating elements. The antenna array is configured to drive the one or more radiating elements within a second frequency range in the communication device. The second frequency range is higher than the first frequency range. The integrated isolating antenna array component also includes an isolator affixed to the interconnection substrate and configured to be connected to electrical ground. The isolator is configured to reduce the radiofrequency coupling between the two antennas within the first frequency range.