Surface-Coupled Dielectric Duplexer for Compact Phase Matching
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Solution Overview
Problem
Conventional dielectric duplexers are large in size and costly due to the need for phase matching between tap and resonators, which requires significant distance and waveguide ports.
Innovation Solution
A dielectric duplexer design with a tap and resonators on the surface of a dielectric body, allowing signal coupling adjustment via tap depth and aperture size for phase matching without altering distances, reducing overall size and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If phase matching is performed by using a waveguide transmission line and waveguide port structure, then phase matching can be achieved, but the distance between the tap and resonators must be relatively large, resulting in a large overall size
Solution Approach 1:
The patent replaces the waveguide transmission line (mechanical waveguide structure) with a dielectric resonator-based coupling structure. The tap directly couples to the resonators through electromagnetic field interaction within the dielectric body, eliminating the need for long waveguide sections and reducing the overall size while maintaining phase matching capability through resonant coupling.
Solution Approach 2:
The patent transitions from a three-dimensional waveguide transmission path to a two-dimensional surface coupling approach. The tap and resonators are positioned on the surface of the dielectric body, utilizing surface wave modes and near-field coupling to achieve phase matching without requiring large separation distances along the transmission path.
2Ease of operation
If waveguide port structure is used for tap design, then signal amplitude and phase can be adjusted, but the structure complexity and production costs increase
Solution Approach 1:
The patent merges the tap structure with the dielectric resonator body, integrating the coupling function directly into the resonator structure. The tap is formed as part of the dielectric body itself, eliminating the need for separate waveguide port structures and reducing overall device complexity while maintaining signal adjustment capability through geometric parameter optimization.
Solution Approach 2:
The patent uses parameter changes in the dielectric resonator geometry (such as cavity dimensions, aperture size, and tap position) to control signal amplitude and phase. By adjusting these physical parameters of the resonator structure itself, the desired signal characteristics are achieved without requiring complex adjustable waveguide components.
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 design achieves a smaller duplexer size and lower production costs by enabling phase matching through surface adjustments, maintaining effective signal filtering and transmission.
Implementation Method 1
a dielectric duplexer is formed by coupling several dielectric resonators. In the dielectric duplexer, a metal conductor is replaced with a dielectric (such as a microwave ceramic), so that an electromagnetic field can be confined within a resonant cavity
Implementation Method 2
a first resonator consists of the first resonance structure and the dielectric body around the first resonance structure, and a second resonator consists of the second resonance structure and the dielectric body around the second resonance structure
Implementation Method 3
a conducting layer covers surfaces of the input/output structure, the tap, the first resonance structure, and the second resonance structure, and the conducting layer covers the surfaces of the dielectric body
Data Source
Figure 1~2
Figure 3~4
Figure 4a~4b
AI summary
Embodiments of this application provide a dielectric duplexer, so that an overall size of a duplexer is made smaller, to reduce production costs. The dielectric duplexer includes a dielectric body, where an input/output structure, a tap, a first resonance structure, and a second resonance structure are provided on the dielectric body. The tap, the input/output structure, the first resonance structure, and the second resonance structure are all cavities provided on a surface of the dielectric body. The tap and the input/output structure are provided on different surfaces of the dielectric body. The tap and the input/output structure are located between the first resonance structure and the second resonance structure. A first resonator consists of the first resonance structure and the dielectric body around the first resonance structure, and a second resonator consists of the second resonance structure and the dielectric body around the second resonance structure. A conducting layer covers a surface of the input/output structure, the tap, the first resonance structure, and the second resonance structure, and the conducting layer covers the surface of the dielectric body except a region around the input/output structure.