BAW Resonator Network for Integrated Impedance Matching and Filtering
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Solution Overview
Problem
The complexity and cost associated with designing and implementing impedance matching networks in electrical circuits, particularly in RF systems, are increased due to the need for discrete impedance matching elements that require additional board space and manufacturing costs, and often necessitate off-chip components for optimal performance.
Innovation Solution
An integrated Bulk Acoustic Wave (BAW) resonator network provides both impedance transformation and filtering functionality, reducing the need for discrete matching elements by integrating impedance matching within the BAW resonator network, which can be configured in various designs such as L, Pi, or Lattice configurations, allowing for reduced board size and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete impedance matching elements are used to achieve proper impedance transformation, then impedance matching performance is improved, but device complexity and board area increase
Solution Approach 1:
The patent combines impedance matching functionality with the BAW resonator network itself, eliminating the need for separate discrete impedance matching elements. The BAW resonator network is designed to provide both its primary resonant function and impedance transformation capability through integrated design, thereby reducing overall device complexity while maintaining impedance matching performance.
Solution Approach 2:
The BAW resonator network is designed to serve multiple functions simultaneously: it provides resonant filtering and impedance transformation. This multi-functionality eliminates the need for separate dedicated impedance matching components, reducing the number of parts and simplifying the overall circuit design while maintaining both resonant and impedance matching performance.
2Reliability
If discrete impedance matching elements are used to achieve proper impedance transformation, then impedance matching performance is improved, but manufacturing cost increases
Solution Approach 1:
By integrating impedance matching functionality into the BAW resonator network, the patent reduces the total component count and eliminates the need for separate discrete impedance matching elements. This integration simplifies manufacturing processes, reduces assembly steps, and lowers overall manufacturing costs while maintaining the required impedance matching performance.
3Reliability
If off-chip components are used to achieve proper impedance transformation, then impedance matching performance is improved, but board area increases
Solution Approach 1:
The patent integrates impedance matching functionality directly into the BAW resonator network, which can be implemented on-chip or in a compact form factor. This integration eliminates the need for separate off-chip impedance matching components, thereby significantly reducing the board area required while maintaining the necessary impedance matching performance.
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 reduces the number and size of discrete impedance matching elements, lowers insertion losses, and decreases manufacturing costs while maintaining competitive insertion and return loss quality, enabling more efficient impedance transformation and filtering within RF systems.
Implementation Method 1
the application of bulk acoustic wave (hereinafter, 'BAW') technology to provide impedance transformation and filtering functionality within a resonator network
Implementation Method 2
A first BAW resonator is disposed between the BAW resonator network input and output. A second BAW resonator is disposed between the BAW resonator network output and ground.
Data Source
AI summary
A system, apparatus and method for providing filtering functionality and impedance transformation within a BAW resonator network are disclosed. In particular, a BAW resonator network is designed to provide band pass capability and a transformation between its input impedance and output impedance. By effectively integrating impedance matching functionality within the BAW resonator network, discrete impedance matching elements previously required within a system may be removed or reduced in size. As a result, matching networks and their associated component costs, insertion losses, and board size contributions may be reduced.