Multi-Output Resonator Filter for Adjacent Band Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current receiver front-ends in wireless communication devices require multiple band-select filters and low noise amplifiers, leading to increased complexity, cost, and signal loss due to the large number of components, especially when handling frequency bands that are close but distinct, such as B25 and B34.
Innovation Solution
A filter configuration with dual-outputs or dual-inputs using cascaded resonator stages, comprising series and parallel micro-acoustic resonators, is introduced to produce multiple filter frequency responses, allowing for reduced component count and improved performance by sharing and reconfiguring existing filter components to cover adjacent frequency bands effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple band-select filters are used to cover adjacent frequency bands, then frequency band coverage is improved, but device complexity and component count increase
Solution Approach 1:
A single filter is designed with multiple outputs, each capable of providing different filter frequency responses for different frequency bands. The filter includes a first output providing a first filter frequency response and a second output providing a second filter frequency response, allowing one filter to replace multiple traditional band-select filters.
Solution Approach 2:
The filter is divided into multiple independent outputs, where each output can be independently configured to provide different filter frequency responses. This segmentation allows the same physical filter to serve multiple frequency band requirements simultaneously.
2Adaptability or versatility
If multiple band-select filters are used to cover adjacent frequency bands, then frequency band coverage is improved, but signal loss increases
Solution Approach 1:
By making a single filter universal with multiple outputs, the signal path is reduced compared to using multiple separate filters. Each output provides different filter frequency responses, reducing the need for multiple filter components and associated signal losses.
3Adaptability or versatility
If multiple band-select filters are used to cover adjacent frequency bands, then frequency band coverage is improved, but cost increases
Solution Approach 1:
A single filter structure with multiple outputs is designed to provide different filter frequency responses, replacing the need for multiple separate filters. This reduces component count and manufacturing cost while maintaining the capability to cover multiple frequency bands.
Solution Approach 2:
Multiple filter functions are merged into a single filter device with multiple outputs. The filter includes resonator stages that can be configured to provide different filter frequency responses at different outputs, combining what would traditionally require multiple separate filter components.
4Adaptability or versatility
If multiple band-select filters are used to cover adjacent frequency bands, then frequency band coverage is improved, but noise figure worsens
Solution Approach 1:
A single filter with multiple outputs provides different filter frequency responses, reducing the total number of filter components in the signal path. This reduction in component count improves the overall noise figure by eliminating additional noise sources that would be introduced by multiple separate filters.
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 configuration reduces the number of components, lowers costs, minimizes signal loss, and enhances noise figure by enabling the same filter to cover adjacent frequency bands like B25 and B34 with minimal impact on existing rejection requirements, thus simplifying the receiver front-end design.
Implementation Method 1
each cascaded resonator stage of the first set comprising a first series micro-acoustic resonator and a first parallel micro-acoustic resonator
Implementation Method 2
first series micro-acoustic resonator and a first parallel micro-acoustic resonator
Data Source
AI summary
A filter is provided that includes a set of cascaded resonator stages coupled between a filter input and a first filter output, wherein the filter includes a second filter output coupled to an output of a first or an intermediate one of the set of cascaded resonator stages. Another filter includes a set of cascaded resonator stages coupled between a first filter input and a filter output, wherein the filter includes a second filter input coupled to an input of an intermediate or a last one of the set of cascaded resonator stages. Both filters are configured to apply a first filter frequency response to a first signal propagating via the set of cascaded resonator stages, and apply a second filter frequency response to a second signal propagating via a subset of one or more of the set of cascaded resonator stages.