Multi-Layer RFID Antenna Signal Transfer
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Solution Overview
Problem
In dense reader environments, RFID systems face challenges in filtering out unwanted adjacent reader transmissions, leading to difficulties in effectively communicating with RFID tags, especially when they are obstructed by other containers or materials, resulting in attenuated signal strength.
Innovation Solution
A system and method for passively transferring radio frequency signals using multiple conductor layers that are spatially proximate, allowing RF signals to be wirelessly received and transmitted between antennas independent of electrical connections, thereby reducing signal attenuation and cost by minimizing the need for physical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional single-layer conductor structures are used with electrical connections, then manufacturing precision can be maintained, but signal attenuation increases and device complexity increases due to multiple physical connections
Solution Approach 1:
The patent transitions from a single-layer conductor structure to a multi-layer conductor structure where conductors are arranged in separate spatial layers. This dimensional change allows RF signals to be transferred between layers through electromagnetic coupling rather than requiring physical electrical connections, thereby reducing signal attenuation while maintaining manufacturing feasibility.
Solution Approach 2:
The patent introduces an intermediary electromagnetic field between spatially separated conductor layers to transfer RF signals. Instead of direct electrical connections, the signal is coupled from one layer to another through the electromagnetic field, reducing the need for physical connections and associated manufacturing complexity.
2Reliability
If multiple physical connections are used to connect conductor layers, then electrical connectivity is ensured, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts the requirement for physical electrical connections between conductor layers by utilizing electromagnetic coupling. The essential function of electrical connectivity is achieved through the electromagnetic field rather than physical conductors, eliminating the need for complex inter-layer connections and reducing manufacturing cost.
Solution Approach 2:
The patent replaces the mechanical system of physical electrical connections with an electromagnetic field-based signal transfer mechanism. This substitution eliminates the need for precise mechanical alignment and physical contact points, thereby simplifying manufacturing and reducing cost while maintaining reliable electrical connectivity.
3Adaptability or versatility
If RF signals are transmitted through obstructed regions, then communication with RFID tags is achieved, but signal strength is attenuated
Solution Approach 1:
The patent uses multi-layer conductor structures to create alternative signal paths that can bypass obstructed regions. By distributing conductors across multiple spatial layers, the system can maintain communication capability with RFID tags even when direct line-of-sight paths are blocked, reducing signal attenuation through diversified routing.
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
Enables efficient communication with RFID tags located in obstructed regions by reducing signal attenuation and decreasing manufacturing complexity, allowing for effective tracking and inventory management of goods in stacked or grouped containers.
Implementation Method 1
The first conductor layer and the second conductor layer are spatially proximate such that the transmission line and the ground plane are configured to passively transfer RF signals between the first antenna and the second antenna independent of an electrical connection between the first conductor layer and the second conductor layer
Data Source
AI summary
The present disclosure includes a system and method for conducting radio frequency signals using multiple layers. In some implementations, a signal transfer element configured to passively transfer RF signals between a first region and a second region includes a first conductor layer having a first continuous conductor configured as a first portion of a first antenna, a transmission line, and a first portion of a second antenna. The first antenna and the second antenna are configured to wirelessly receive and transmit Radio Frequency (RF) signals. The signal transfer element also includes a second conductor layer having a second continuous conductor configured as a second portion of the first antenna, a ground plane, and a second portion of the second antenna. The first conductor layer and the second conductor layer are spatially proximate such that the transmission line and the ground plane are configured to passively transfer RF signals between the first antenna and the second antenna independent of an electrical connection between the first conductor layer and the second conductor layer.