Multi-layer antenna with conductive resonator stop band
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Solution Overview
Problem
Existing multi-band antenna arrangements often suffer from insufficient isolation between operational frequency bands, leading to interference due to their wide operational bandwidths.
Innovation Solution
A multi-layer antenna arrangement is designed with a conductive radiating element having overlapping resonant modes and a conductive resonator in a third layer that provides a stop band, isolating the frequency bands and reducing cross-talk, comprising a slotted patch antenna with stepped slots and microstrip resonators, and a lifted ground plane for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single wide operational bandwidth antenna is used to cover multiple frequency bands, then the antenna can operate across multiple bands, but isolation between different operational frequency bands becomes insufficient causing interference
Solution Approach 1:
The antenna is divided into multiple resonant elements, each responsible for specific frequency bands. The first resonant element handles lower bands while the second resonant element handles higher bands, with each element having its own feed line and grounding structure. This segmentation enables independent optimization of each band's performance while maintaining isolation between bands.
Solution Approach 2:
The patent introduces a third dimension by stacking resonant elements vertically at different heights above the ground plane. The first resonant element is positioned at a first height and the second resonant element at a second height, creating spatial separation that provides inherent isolation between frequency bands while maintaining multi-band operation capability.
2Object-affected harmful factors
If multiple separate antennas are used for different frequency bands, then isolation between bands is improved, but device complexity increases
Solution Approach 1:
Multiple resonant elements are merged into a single integrated antenna structure that shares a common ground plane and housing. The first and second resonant elements are positioned at different heights within the same antenna assembly, allowing them to function as separate band-specific antennas while maintaining a unified structure that reduces overall device complexity.
Solution Approach 2:
The antenna structure is designed with universal components that serve multiple functions: the ground plane provides reference for all resonant elements, the housing provides mechanical support and shielding for all elements, and the feed network can selectively excite different resonant elements based on the desired operating band, enabling a single structure to handle multiple frequency bands.
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 effectively isolates operational frequency bands, reducing interference and maintaining flat gain performance across the desired frequency ranges, suitable for 5G telecommunications with compact size and ease of fabrication.
Implementation Method 1
a conductive radiating element configured to have multiple overlapping resonant modes that define a first frequency range
Implementation Method 2
a conductive resonator configured to provide a stop band within the first frequency range
Data Source
Figure 1~2C
Figure 3~5
Figure 6~7D
AI summary
A multi-layer antenna arrangement comprising: a first layer comprising a conductive radiating element configured to have multiple overlapping resonant modes that define a first frequency range; a second layer comprising at least a portion of a ground plane for the conductive radiating element; a third layer, between the first layer and the second layer, comprising a conductive resonator configured to provide a stop band within the first frequency range.