Bridge-Type Acoustic Filters for Wideband 5G Linearity
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Solution Overview
Problem
Current wireless transceivers face challenges in achieving wide bandwidths and high linearity for 5G and 6G technologies due to limitations in existing resonator technology, particularly with ladder-type filters, which also increase the size and cost of electronic devices.
Innovation Solution
The implementation of bridge-type filters using acoustic wave resonators with diverse resonator arrangements, such as multiple acoustic resonators coupled in series, parallel, or combinations, and impedance inverters, to enhance filter selectivity and reduce component count, thereby minimizing device size and cost while achieving wide bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ladder-type filters are used to achieve wide bandwidths and high linearity, then filter performance is improved, but device size and manufacturing cost increase
Solution Approach 1:
The filter is divided into multiple resonator arrangements, each handling specific frequency ranges. This segmentation allows the filter to achieve wide bandwidth performance through coordinated operation of individual resonators, reducing the need for a single large complex structure while maintaining filter performance.
Solution Approach 2:
Multiple resonator arrangements are combined in a bridge-type configuration where their effects are integrated to achieve superior filter performance. The merging of multiple resonators with different resonant frequencies creates a composite filtering effect that provides wide bandwidth and high linearity in a compact form factor.
2Reliability
If ladder-type filters are used to achieve wide bandwidths and high linearity, then filter performance is improved, but manufacturing cost increases
Solution Approach 1:
The filter design utilizes resonators with specifically tuned resonant frequencies as key parameters. By changing and optimizing these frequency parameters across multiple resonator arrangements, the filter achieves superior performance characteristics. This parameter-based design allows for standardized manufacturing processes while maintaining high performance, reducing manufacturing costs compared to custom ladder-type filters.
Solution Approach 2:
The bridge-type filter structure serves multiple functions simultaneously: it provides frequency selection, impedance matching, and signal isolation through its resonator arrangements. This multi-functionality reduces the need for separate components, simplifying the manufacturing process and reducing overall manufacturing costs while maintaining high filter performance.
3Manufacturing precision
If multiple acoustic resonators are coupled in series and parallel arrangements, then filter selectivity is improved, but device complexity increases
Solution Approach 1:
The bridge-type filter employs asymmetric coupling arrangements between resonators, with series and parallel configurations strategically placed to achieve specific filtering characteristics. This asymmetric design provides superior selectivity by creating different signal paths with distinct impedance characteristics, while the systematic arrangement maintains manufacturing feasibility.
Solution Approach 2:
The filter design transitions from simple series or parallel resonator configurations to a two-dimensional bridge-type architecture with resonators arranged in both series and parallel paths. This dimensional expansion allows for independent optimization of different signal paths, achieving high selectivity through the interaction of multiple resonant modes while maintaining a structured layout that simplifies manufacturing.
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 enables wireless transceivers to provide superior out-of-band attenuation and linearity, reducing the physical size and manufacturing costs of electronic devices while meeting the bandwidth requirements of 5G and future 6G technologies.
Implementation Method 1
The filter core includes at least one transformer, a first resonator arrangement, and a second resonator arrangement. The first resonator arrangement is coupled to the at least one transformer and includes multiple acoustic resonators. The second resonator arrangement is coupled to the at least one transformer and includes multiple acoustic resonators.
Implementation Method 2
This document describes, for example, multiple bridge-type filter architectures that can employ acoustic wave resonators.
Data Source
AI summary
An apparatus is disclosed for a bridge-type filter. In example aspects, the apparatus includes a filter circuit having a first port, a second port, and a filter core. The filter core is coupled between the first port and the second port. The filter core includes at least one transformer, a first resonator arrangement, and a second resonator arrangement. The first resonator arrangement is coupled to the at least one transformer and includes multiple acoustic resonators. The second resonator arrangement is coupled to the at least one transformer and includes multiple acoustic resonators.