Resonator-Phase Shifter Hybrid for Low-Loss Frequency Extraction
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Solution Overview
Problem
Current RF communication systems face challenges in achieving low insertion loss and high rejection in wideband frequency extraction, particularly in 5G frequency ranges, due to trade-offs between signal power loss and unwanted frequency attenuation.
Innovation Solution
The integration of a resonator and a phase shifter in hybrid structures, either in series or parallel configurations, to optimize impedance and introduce additional transmission and reflection zeros, improving frequency response and reducing trade-offs between insertion loss and rejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional frequency extraction methods are used, then device complexity is reduced, but insertion loss increases and rejection performance deteriorates
Solution Approach 1:
The patent combines a resonator and a phase shifter into a hybrid structure that integrates both frequency selection and phase control functions. This merging allows the system to achieve low insertion loss through the resonator's high Q-factor while the phase shifter provides additional degree of freedom for optimizing frequency response, thereby reducing overall energy loss without proportionally increasing complexity
Solution Approach 2:
The hybrid structure serves multiple functions simultaneously: the resonator provides frequency selection and high Q-factor performance, while the phase shifter introduces transmission and reflection zeros for enhanced rejection. This multi-functionality allows a single hybrid structure to address both insertion loss and rejection performance requirements that would otherwise require separate components
2Object-generated harmful factors
If conventional frequency extraction methods are used, then device complexity is reduced, but rejection performance deteriorates
Solution Approach 1:
The patent merges the resonator and phase shifter into a unified hybrid structure where the phase shifter's ability to introduce transmission and reflection zeros complements the resonator's frequency selection. This combination creates a system that achieves superior rejection performance by placing zeros at unwanted frequencies, while the integrated design manages complexity through shared structural elements
Solution Approach 2:
The patent utilizes parameter changes in the phase shifter (such as variable phase shift amounts or impedance transformations) to dynamically control the locations of transmission and reflection zeros. By adjusting these parameters, the system can optimize rejection performance for different frequency ranges without requiring complete redesign of the hybrid structure
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 approach enhances the extraction of specific frequency components with improved rejection and insertion loss, particularly in 5G frequency ranges, by controlling the phase shifter's impedance and zero locations, leading to more efficient signal processing.
Implementation Method 1
impedance between the first and second nodes has an order of four or more
Implementation Method 2
the phase shifter introduces at least one reflection zero and at least one transmission zero
Implementation Method 3
a resonator coupled to a first node
Data Source
AI summary
A frequency extraction filter is disclosed. The frequency extraction filter can include a resonator that is coupled to a first node, and a phase shifter that is connected to the resonator in series. The phase shifter is coupled to a second node such that the resonator and the phase shifter are positioned between the first and second nodes. Impedance between the first and second nodes has an order of four or more.