Multi-Resonance Frequency Filter for Wide Passband Tuning
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Solution Overview
Problem
Current frequency filters are limited to a single frequency range and tunable filters have a restricted tuning range, making them inadequate for communication devices that need to operate across multiple specified frequency ranges without significant signal degradation.
Innovation Solution
A frequency filter circuit with series and shunt resonators having multiple periodic resonances with different periodicities, allowing for a larger tuning range of the passband by adjusting the resonators by 5-10%, resulting in an aggregate tuning range of up to 100% through a ladder topology or similar configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single frequency filter is used, then the device structure is simple, but it can only operate within a single specified frequency range
Solution Approach 1:
The patent implements a universal frequency filter that can operate across multiple frequency ranges (e.g., 15 different bands) by using tunable resonators with multiple periodic resonances. Instead of requiring 15 separate filters, a single filter structure with adjustable resonators provides multi-functionality, allowing the same hardware to serve multiple frequency band requirements through electrical tuning.
2Adaptability or versatility
If tunable filters are used to adjust the passband, then frequency flexibility is improved, but the tuning range is limited to about ten percent without severe signal degradation
Solution Approach 1:
The patent changes the fundamental parameter of resonator design by using resonators with multiple periodic resonances instead of single-resonance tunable resonators. This allows the passband to be tuned across a much wider range (up to 100% or more) by selecting different resonance modes, while maintaining signal quality because each mode is designed to provide adequate rejection of adjacent frequency bands.
Solution Approach 2:
The patent implements dynamic tuning capability where the resonators can be electrically adjusted to operate at different resonance frequencies. The system dynamically switches between different periodic resonances of the same resonator structure, enabling wide frequency range adaptation without physical reconfiguration or compromising signal integrity.
3Adaptability or versatility
If multiple frequency filters are used to cover different frequency ranges, then frequency coverage is improved, but the device complexity and filter quantity increase
Solution Approach 1:
The patent creates a universal filter structure that replaces multiple specialized filters with a single multi-functional device. By incorporating tunable resonators capable of operating at multiple periodic resonances, the filter can be configured for different frequency bands (e.g., 15 different cellular bands) without requiring separate filter hardware for each band.
Solution Approach 2:
The patent merges the functionality of multiple separate frequency filters into a single integrated filter structure. Instead of having 15 discrete filters in the signal path, the design combines them into one filter with tunable resonators that can be electrically reconfigured to provide the equivalent functionality of multiple filters, thereby reducing overall device complexity.
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 communication devices to operate on multiple frequency bands with minimal signal degradation, reducing the need for multiple filters and enhancing flexibility in frequency adjustment.
Implementation Method 1
A frequency filter circuit may include one or more series resonators and one or more shunt resonators. Individual series resonators of the one or more series resonators may have multiple periodic resonances with a first periodicity. Individual shunt resonators of the one or more shunt resonators may have multiple periodic resonances with a second periodicity that may be different from the first periodicity.
Data Source
AI summary
Embodiments may provide, among other things, a frequency filter including one or more series resonators and one or more shunt resonators. The series resonators may have a first periodicity and the shunt resonators may have a second periodicity. The frequency filter may include a control circuit that may be configured to cause a change in frequency of the one or more series resonators or the one or more shunt resonators of less than the first or second periodicity, respectively, and the change in frequency may result in a change to a passband associated with the frequency filter of at least the first or second periodicity. Additional embodiments may be described and/or claimed herein.