Switchable Near- and Far-Field Interface for RF Isolation
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Solution Overview
Problem
The limited spectral bandwidth in ISM radio bands for consumer products leads to potential interference and degraded communication performance, and integrating multiple antennas with sufficient RF isolation requires more space than available in these devices.
Innovation Solution
A switchable communication interface that includes a wireless communication controller, a switch, a near field energy coupler, and a far field wireless communication antenna, allowing the switch to switch communication between these components to optimize communication based on proximity, using near field energy coupling for close proximity and far field wireless communication for further distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are integrated into a compact communication device, then communication capacity is improved, but RF isolation between antennas deteriorates and space requirements increase
Solution Approach 1:
The communication system is segmented into two distinct operational modes: near-field communication mode using a first antenna and far-field communication mode using a second antenna. The switch divides the communication path into separate segments based on communication distance and requirements, allowing each antenna to be optimized for its specific function without requiring both antennas to coexist with high RF isolation in the same space.
Solution Approach 2:
The system dynamically switches between near-field and far-field communication modes based on the communication requirements and detected conditions. The switch transitions the connection between the wireless communication controller and different antennas, enabling adaptive allocation of communication resources and spatial separation of antenna functions based on operational needs rather than fixed configuration.
2Productivity
If multiple antennas are integrated into a compact communication device, then communication capacity is improved, but device size increases
Solution Approach 1:
The antenna system is segmented into functionally distinct first and second antennas serving different communication ranges and purposes. This segmentation allows each antenna to be smaller and optimized for its specific near-field or far-field operation, rather than requiring both antennas to be large enough to handle all communication scenarios, thereby reducing overall device volume.
Solution Approach 2:
The communication device implements a universal communication interface that can operate in both near-field and far-field modes through the switchable connection. This multi-functionality allows a single device to handle diverse communication requirements using appropriately sized antennas for each mode, avoiding the need for oversized antennas that could accommodate all ranges simultaneously.
3Adaptability or versatility
If ISM radio band frequencies are used for wireless communications, then communication availability is improved, but interference between concurrent communications increases
Solution Approach 1:
The wireless communication system is segmented into near-field and far-field operational modes, each using the ISM radio band but operating under different spatial and temporal conditions. The switch enables selective activation of appropriate modes based on interference conditions, allowing the system to utilize ISM frequencies effectively while avoiding concurrent interference through mode differentiation.
Solution Approach 2:
The switch acts as an intermediary component that mediates between the wireless communication controller and the antennas, enabling selective connection to near-field or far-field antennas based on interference conditions. This intermediary controls the communication path to prevent concurrent transmissions that would cause interference while maintaining availability through appropriate mode selection.
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 reduces interference and increases throughput and reduces latency by utilizing multiple communication channels, enhancing communication efficiency and flexibility.
Implementation Method 1
a near field energy coupler configured for wireless communications
Implementation Method 2
a far field wireless communication antenna configured for wireless communications
Implementation Method 3
shielding the near field energy coupler with one or more electromagnetic shielding structures
Data Source
AI summary
A communication device includes a wireless communication controller, a switch, a near field energy coupler configured for wireless communications and communicatively connectable to the wireless communication controller through the switch. The communication device also includes a far field wireless communication antenna configured for wireless communications and communicatively connectable to the wireless communication controller through the switch. The switch is configured to switch communication with the wireless communication controller between the near field energy coupler and the far field wireless communication antenna.