Duplexer Combining Panel for Signal Isolation
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Solution Overview
Problem
Existing duplexers face challenges in simultaneously achieving narrow bandwidth and superior frequency cutoff characteristics, which are essential for effective signal separation in communication systems.
Innovation Solution
A duplexer design incorporating a combining panel with overlapping areas between dielectric resonators nearest to the antenna, along with a cavity structure, where the resonators have a body made of dielectric material with a unidirectional through hole and a conducting layer on the hole's cross-section, and a substrate performing a ground function, enhances signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional duper structure is used, then the device complexity is reduced, but the bandwidth becomes wide and cutoff characteristics deteriorate
Solution Approach 1:
The duplexer is divided into multiple resonators (first resonators for transmission path, second resonators for receiving path) arranged in a segmented manner. Each resonator is positioned at specific locations within the cavity, and combining panels are placed between adjacent resonators to create isolated resonance regions. This segmentation allows independent control of transmission and reception frequency paths, achieving narrow bandwidth and superior cutoff characteristics while maintaining manageable structural complexity.
Solution Approach 2:
Different regions of the duplexer structure are assigned different functional qualities: resonators are placed at specific locations to resonate at particular frequencies, combining panels are positioned between specific resonators to isolate their resonance, and the cavity is configured with specific dimensions to support the desired frequency separation. This local differentiation of functional qualities enables precise control over signal paths and frequency filtering.
2Productivity
If resonators are positioned close to antenna, then signal transmission efficiency is improved, but interference between transmission and reception paths increases
Solution Approach 1:
The harmful electromagnetic coupling between transmission and reception resonators is extracted and eliminated by inserting combining panels between adjacent resonators. These combining panels act as isolation barriers that prevent direct electromagnetic interaction between resonators on opposite sides (transmission vs. reception paths), thereby removing the interference mechanism while allowing resonators to remain positioned close to the antenna for efficient signal coupling.
Solution Approach 2:
Combining panels are introduced as intermediary elements between adjacent resonators. These panels serve as mediators that physically separate and electrically isolate the transmission path resonators from the reception path resonators. The combining panels include through-holes that allow controlled electromagnetic coupling only within the same signal path, preventing harmful cross-path interference while maintaining necessary signal transmission.
3Manufacturing precision
If combining panel is positioned between resonators, then frequency isolation is improved, but manufacturing complexity increases
Solution Approach 1:
The combining panels are designed to combine multiple functions into a single component: they provide physical separation between resonators, establish electrical isolation through their conductive structure, and create the necessary electromagnetic boundary conditions for frequency isolation. By merging these multiple functions into one integrated component, the design achieves superior frequency isolation without proportionally increasing manufacturing complexity, as the combining panel can be fabricated as a single piece with through-holes and conductive patterns.
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 design achieves low signal loss and superior cutoff characteristics by effectively managing signal pathways through the resonators and combining panel, allowing for efficient transmission and reception of signals within specific frequency ranges.
Implementation Method 1
a plurality of first resonators disposed along the transmission path of the transmitting signal; a plurality of second resonators disposed along the transmission path of the receiving signal
Implementation Method 2
a conducting layer formed on the cross-section of at least one side of the cross-sections of the both sides along the lengthwise direction of said body, and the surface of the wall of said through hole
Implementation Method 3
a substrate, coupled with the cross-section of at least one side of the both sides of each of the first resonators and the second resonators respectively, and performing ground function
Data Source
AI summary
A duplexer includes a plurality of first resonators disposed along the transmission path of the transmitting signal; a plurality of second resonators disposed along the transmission path of the receiving signal; and a combining panel having an overlapped area between one of the plurality of first resonators which is disposed closest to an antenna and one of the plurality of second resonators which is disposed closest to the antenna, wherein each of said first resonators and said second resonators includes: a body comprised of dielectric material, and formed with a through hole penetrating unidirectionally, and a conducting layer formed on the cross-section of at least one side of the cross-sections of the both sides along the lengthwise direction of said body, and the surface of the wall of said through hole.