Dual-Frequency Resonator Assembly in Shared Cavity
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Solution Overview
Problem
Conventional resonant devices require separate cavities for each frequency, leading to larger size and complexity, especially in RF front ends that need to handle multiple frequencies, and existing tuning mechanisms can interfere with resonator performance.
Innovation Solution
A dual-frequency resonator assembly where a first resonance post filters a signal at a first frequency and a second resonance post filters a signal at a second frequency, both located within the same conductive enclosure, with harmonics uncoupled and independently tunable, allowing for a single device to operate at multiple frequencies without increasing physical size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate cavities are used for each frequency, then filtering performance at each frequency is maintained, but device size and complexity increase
Solution Approach 1:
The patent merges multiple resonant circuits operating at different frequencies into a single shared cavity. The conductive enclosure houses multiple resonance posts (first and second resonance posts) that each provide filtering at their respective frequencies while sharing the same cavity space, thereby reducing overall device size and complexity while maintaining filtering performance.
Solution Approach 2:
The single conductive enclosure is designed to serve multiple functions by supporting multiple resonant modes simultaneously. The cavity acts as a universal resonating structure that can accommodate different resonance posts tuned to different frequencies, allowing one component to perform what would traditionally require multiple separate components.
2Device complexity
If multiple resonance posts are placed in the same cavity, then device size is reduced, but harmonic interference and resonance coupling may occur
Solution Approach 1:
Each resonance post is given distinct local characteristics through different dimensions, positions, and orientations within the cavity. The first resonance post is configured with specific dimensional parameters for its frequency, while the second resonance post has different parameters. This local differentiation ensures that each post operates independently at its designated frequency without harmful harmonic interference, while still sharing the same cavity space.
3Adaptability or versatility
If resonance posts are tuned to different frequencies, then multi-frequency operation is achieved, but frequency ratio close to unity causes resonance coupling
Solution Approach 1:
The patent carefully selects and adjusts the dimensional parameters of the resonance posts and their spacing within the cavity to ensure that the ratio of the second frequency to the first frequency avoids values close to unity. By changing these physical parameters (dimensions, positions, orientations), the design achieves multi-frequency operation while preventing unwanted resonance coupling between the different frequency modes.
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
Enables smaller, more efficient resonator filters with improved Q-factor and reduced manufacturing complexity, allowing for high-performance filtering in compact form factors with independent control of resonant frequencies.
Implementation Method 1
a first resonance post operable to filter a signal at a first frequency and a second resonance post operable to filter a signal at a second frequency; wherein said first and second resonance posts are configured such that harmonics of said first frequency fail to coincide with harmonics of said second frequency and a ratio of said second frequency to first frequency is not close to unity such that resonances of the cavity at said first and second frequencies are uncoupled
Data Source
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AI summary
A resonator assembly is disclosed. The resonator assembly comprises a resonator having a first resonance post coaxially surrounded by a conductive enclosure defining a cavity, the first resonance post being operable to filter a signal at a first frequency and a second resonance post located within the cavity, the second resonance post being operable to filter a signal at a second frequency. Through this approach it is possible to provide a single device which implements more than one independent resonance within the same cavity volume, allowing to build significantly smaller cavity filters, which avoids the need to provide separate devices, one for each frequency.