Bearing-Plate Antenna Assembly for MIMO Coupling Cancellation
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Solution Overview
Problem
The miniaturization of wireless access devices is hindered by the need for increased MIMO antennas, which require greater spatial isolation, leading to larger device sizes due to the central placement of radio frequency chipsets and limited space for antennas.
Innovation Solution
An antenna assembly with a bearing plate that forms an anti-interference path between antenna parts, allowing for reduced isolation without performance degradation, enabling more antennas to be deployed or the device to be miniaturized by using a dual-frequency band and dual-feed configuration with independent antenna parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the quantity of MIMO antennas is increased to provide more communication streams, then the communication capacity and throughput are improved, but the device size increases due to the required spatial isolation between antennas
Solution Approach 1:
The patent applies preliminary anti-action by introducing an anti-interference path that proactively cancels out the coupling interference between closely spaced antennas. The bearing plate creates a signal path that generates an opposite-phase signal to neutralize the harmful coupling effect, allowing antennas to be placed closer together without sacrificing isolation performance, thus enabling increased antenna density while maintaining compact device size.
2Ease of manufacture
If the radio frequency chipsets are centrally disposed on the mainboard to improve integration, then the manufacturing efficiency is improved, but the space available for antennas becomes smaller
Solution Approach 1:
The patent applies dimensionality change by transitioning from a planar ground plane to a three-dimensional bearing plate structure. The bearing plate extends vertically from the mainboard, creating additional spatial dimensions for antenna placement. This allows antennas to be positioned in the vertical dimension rather than competing for horizontal space, thereby accommodating both centralized RF chipsets and sufficient antenna space within the same device footprint.
3Reliability
If the interval between MIMO antennas is increased to meet isolation requirements, then the antenna performance is improved, but the device becomes larger and more difficult to miniaturize
Solution Approach 1:
The patent applies the intermediary principle by introducing a bearing plate as a mediating structure between closely spaced antennas. The bearing plate serves as an intermediate element that provides both mechanical support and electromagnetic isolation through its ground points and radiation arms. This intermediary structure enables antennas to maintain close spacing while achieving the required isolation levels through the bearing plate's electromagnetic shielding and coupling cancellation mechanisms.
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 effectively cancels interference between antennas, allowing for increased antenna density and miniaturization of wireless access devices while maintaining performance, and supports multiple frequency bands with separate radiation arms.
Implementation Method 1
an anti-interference path is formed between the first port and the second port by using the bearing plate. The anti-interference path may be configured to cancel interference caused by coupling between the first radiation arm and the second radiation arm
Data Source
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AI summary
An antenna assembly and a wireless access device are provided, and relate to the field of antenna technologies. The antenna assembly can provide a plurality of links, thereby reducing a quantity of antennas disposed in the wireless access device. The antenna assembly includes a first antenna part and a second antenna part. A first port, a first radiation arm, a first ground point, and a first bearing part of a bearing plate form the first antenna part. A second port, a second radiation arm, a second ground point, and a second bearing part of the bearing plate form the second antenna part. The first radiation arm is configured to radiate a radio frequency signal received by the first port, and transmit a received radio frequency signal to the first port. The second radiation arm is configured to radiate a radio frequency signal received by the second port, and transmit a received radio frequency signal to the second port. An anti-interference path passing through the bearing plate exists between the first port and the second port, and the anti-interference path is configured to cancel interference caused by coupling between the first radiation arm and the second radiation arm.