Chain Antenna System for Uniform RFID Field Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional RFID antenna systems, particularly linear antenna arrays, suffer from uneven energy distribution and increased power consumption due to extensive cabling, leading to inefficient performance in near and medium electromagnetic fields.
Innovation Solution
A chain antenna system with a plurality of radiating elements coupled via a single transmission line and power dividers, ensuring equal power distribution and matching impedance, thereby maintaining a low voltage standing wave ratio (VSWR) and reducing energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional linear antenna arrays are used to achieve directional transmission, then directional functionality is improved, but uniformity of energy distribution deteriorates
Solution Approach 1:
The antenna system is divided into multiple sequentially connected radiating elements forming a chain, where each element is fed through a transmission line and power divider. This segmentation allows each element to contribute to the overall radiation pattern while maintaining more uniform energy distribution compared to conventional linear arrays, resolving the contradiction between directional capability and uniformity.
2Manufacturing precision
If parallel configurations with multiple radiating elements are implemented, then uniformity of energy distribution is improved, but device complexity and power consumption increase
Solution Approach 1:
Multiple radiating elements are merged into a single chain configuration connected through a continuous transmission line with power dividers, eliminating the need for separate cabling to each element. This combining approach maintains uniform energy distribution across all elements while significantly reducing overall system complexity and power consumption compared to parallel configurations.
3Speed
If conventional linear antenna arrays are used, then directional transmission is achieved, but loss of energy increases due to extensive cabling
Solution Approach 1:
The transmission line is configured as a continuous chain connecting all radiating elements in sequence, allowing RF energy to flow continuously through the entire antenna system without requiring multiple separate cable connections. This continuous configuration minimizes resistive losses and reduces overall power consumption while maintaining the directional transmission capability through the array factor of the chain elements.
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
The solution achieves uniform electromagnetic field distribution and improved efficiency, allowing for effective interrogation of RFID tags across a larger volume with reduced power consumption and fabrication costs.
Implementation Method 1
power dividers coupling the plurality of radiating elements to the transmission line. The power dividers are coupled along the transmission line, and are configured such that they provide an equal distribution of power between each of the plurality of radiating elements
Implementation Method 2
a transmission line, and power dividers coupling the plurality of radiating elements to the transmission line
Implementation Method 3
A chain antenna system with a plurality of radiating elements coupled via a single transmission line and power dividers, ensuring equal power distribution and matching impedance, thereby maintaining a low voltage standing wave ratio (VSWR) and reducing energy loss
Data Source
AI summary
A RFID system, according to one embodiment, includes: a plurality of radiating elements, a transmission line, and power dividers coupling the plurality of radiating elements to the transmission line. The power dividers are coupled along the transmission line, and are configured such that they provide an equal distribution of power between each of the plurality of radiating elements. Moreover, an input impedance of each of the power dividers is about equal to an impedance of the transmission line.