Dual-Mode Resonator Coupling Groove Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dual-mode resonators face challenges in independently controlling positive and negative coupling, making it difficult to design and optimize their performance effectively.
Innovation Solution
A dual-mode resonator design featuring a dielectric body with specific coupling grooves and tuning mechanical parts allows for independent control of positive and negative coupling by adjusting the widths and depths of the grooves, enabling a wide bandwidth and flexible coupling strength tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional dual-mode resonator structures are used, then the resonator can achieve miniaturization and high Q/V ratio, but independent control of positive and negative coupling is difficult
Solution Approach 1:
The coupling control mechanism is segmented into two independent parts: the first coupling groove controls positive coupling between dual modes, and the second coupling groove controls negative coupling. By segmenting the coupling paths, each groove can be independently designed and adjusted without affecting the other, enabling independent control of positive and negative coupling while maintaining simple device structure
Solution Approach 2:
The first and second coupling grooves are designed with asymmetric properties: they have different extension directions (at preset angles to each other), different widths, and different depths. This asymmetric design allows each groove to selectively control specific coupling modes (positive or negative) by adjusting their individual geometric parameters, achieving independent coupling control through asymmetric structure optimization
2Adaptability or versatility
If coupling grooves with different widths and depths are used, then coupling strength can be tuned independently, but manufacturing precision requirements increase
Solution Approach 1:
Different local regions of the dielectric body are given different coupling groove characteristics: the first coupling groove has specific width and depth parameters optimized for positive coupling control, while the second coupling groove has different width and depth parameters optimized for negative coupling control. This local quality differentiation allows each groove to perform its specific coupling function independently, providing flexible tuning capability while the precision requirements are localized to each groove rather than requiring uniform high precision across the entire structure
Solution Approach 2:
The coupling strength is controlled by changing the geometric parameters (width and depth) of the coupling grooves. By adjusting these parameters within reasonable ranges, the coupling strength can be tuned independently for each groove. This parameter-based control method provides flexibility in coupling strength adjustment while allowing for standard manufacturing tolerances, as the coupling characteristics can be optimized through parameter selection rather than requiring extreme precision
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 enables precise control over coupling coefficients, allowing for a wide bandwidth and improved design flexibility, enhancing the performance of dual-mode resonators in communication systems.
Implementation Method 1
a first coupling groove and a second coupling groove are provided on the central part, where an extension direction of the first coupling groove is between two adjacent components, an extension direction of the second coupling groove is between the other two adjacent components, widths and/or depths of the first coupling groove and the second coupling groove are different
Data Source
Figure 1A
Figure 1B~2
Figure 3
AI summary
Embodiments of this application provide a dual-mode resonator, a filter, and a radio frequency unit. The dual-mode resonator includes: a cavity and a dual-mode dielectric body coupled to an inner surface of the cavity, where the dual-mode dielectric body includes a central part and four components that protrude from the central part, the four components are disposed opposite to each other in pair and are in a cross shape, and a first coupling groove and a second coupling groove are provided on the central part, where an extension direction of the first coupling groove is between two adjacent components, an extension direction of the second coupling groove is between the other two adjacent components, the widths and/or the depths of the first coupling groove and the second coupling groove are different, and the extension direction of the first coupling groove and the extension direction of the second coupling groove are at a preset angle. Due to the first coupling groove and the second coupling groove, there is a relatively large coupling coefficient between two resonance modes of the dual-mode resonator. The widths and/or the depths of the first coupling groove and the second coupling groove are different. Therefore, independent control over positive and negative coupling and coupling strength of the dual-mode resonator is implemented.