Acoustic Filter Bypass Path for High Power Low-Loss Band-Pass Response
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Solution Overview
Problem
Current high-Q RF filters lack high power handling capabilities, limiting their application in high power communication devices and requiring improved designs that can operate across various frequency ranges with low loss.
Innovation Solution
A high power and low loss acoustic filter design incorporating a power bypass path in parallel with a high Q factor acoustic resonator path, which includes transmission line or L-C structures, achieving a steep band-pass filter response with minimal loss and high power handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-Q acoustic resonator paths are used to achieve steep filtering, then filtering selectivity is improved, but power handling capability deteriorates
Solution Approach 1:
The filter is divided into multiple parallel paths: high-Q acoustic resonator paths for steep filtering and separate power bypass paths for high power handling. Each path is optimized for its specific function, allowing the system to achieve both steep filtering and high power handling simultaneously.
Solution Approach 2:
Power bypass paths act as intermediary elements that provide an alternative route for power flow. These paths include transmission lines and L-C circuits with low loss characteristics, allowing high power to bypass the acoustic resonators while the resonators continue to provide steep filtering.
2Measurement precision
If high-Q acoustic resonator paths are used to achieve steep filtering, then filtering selectivity is improved, but energy loss deteriorates
Solution Approach 1:
The filter structure segments the signal path into filtering functions (handled by acoustic resonators) and power transmission functions (handled by low-loss bypass paths). This segmentation allows each path to be optimized independently, minimizing overall energy loss while maintaining steep filtering characteristics.
Solution Approach 2:
Low-loss transmission lines and L-C circuits serve as intermediary power bypass paths that provide an efficient energy transmission route. These intermediaries have been specifically designed with low loss characteristics to minimize energy dissipation while allowing the acoustic resonators to focus on providing steep filtering.
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 steep band-pass filter response with low loss and high power handling, enabling effective signal filtering in high power communication devices across a wide range of frequencies.
Implementation Method 1
at least one acoustic resonator that forms an acoustic resonator network with a notch filter response, where the acoustic resonator path has a Q factor no less than 500
Data Source
AI summary
The present disclosure relates to a high power and low loss acoustic filter that includes a first node, a second node, a first power bypass path, and a first acoustic resonator (AR) path. The first power bypass path extends between the first node and the second node. The first AR path also extends between the first node and the second node, is in parallel with the first power bypass path, and includes at least one first acoustic resonator that form an acoustic resonator network. Herein, the first AR path has a notch filter response. The first power bypass path and the first AR path form a first filter cell that has a band-pass filter response.