Electroacoustic Filter Blocks for Low Phase Delay Multiplexing

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Solution Overview

Problem

Existing wireless communication filters struggle to meet performance thresholds for multi-band communication systems, particularly in environments with dynamic spectrum sharing and carrier aggregation, due to size constraints and inefficiencies in filtering high-frequency signals.

Innovation Solution

The use of electroacoustic resonators configured in split pole configurations with series and shunt resonators, forming filter blocks that include both passband and notch filters, allowing for standardized structures that improve device performance and compliance with communication standards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If acoustic resonators are used to filter high-frequency signals, then the filter size is reduced, but the phase delay increases

Engineering Contradiction:

Improvefilter sizeVSAvoidphase delay

Core Design Contradiction:

Volume of moving objectVSLoss of time

Solution Approach 1:

The filter is divided into multiple stages, each with a specific function (bandpass filtering, notch filtering, phase compensation). The segmentation allows the filter to achieve size reduction through acoustic resonators while compensating for phase delay through dedicated compensation stages, resolving the contradiction between compact size and phase performance

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A phase compensation network is introduced as an intermediary element between the acoustic resonator stages. This intermediary component specifically addresses the phase delay issue without requiring changes to the core acoustic filtering mechanism, allowing the filter to maintain both small size and acceptable phase characteristics

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If multiple RF filters are used for multi-band communication, then the filtering performance improves, but the device complexity increases

Engineering Contradiction:

Improvefiltering performanceVSAvoidfilter configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Multiple filtering functions (bandpass filtering for different bands, notch filtering for rejection, and phase compensation) are merged into a single integrated filter structure. This consolidation maintains the filtering performance needed for multi-band communication while reducing the overall device complexity by eliminating the need for separate filter components

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The filter structure is designed to be universal and multi-functional, capable of handling multiple frequency bands and performing both bandpass and notch filtering within a single configuration. This multi-functionality allows the filter to meet multi-band communication requirements without increasing device complexity through multiple specialized filters

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 proposed filter configurations enhance communication performance by meeting performance thresholds for multi-band systems, simplifying design and manufacturing, and improving device reliability and efficiency.

Implementation Method 1

Using a piezoelectric material as a vibrating medium, acoustic resonators operate by transforming an electrical signal wave that is propagating along an electrical conductor into an acoustic wave that is propagating via the piezoelectric material

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Implementation Method 2

acoustic resonators operate by transforming an electrical signal wave that is propagating along an electrical conductor into an acoustic wave that is propagating via the piezoelectric material

Methodology Applied

Scientific EffectAcoustic resonance: Resonance

Data Source

PatentUS12438520B2Electroacoustic filter with low phase delay for multiplexed signals

Publication Date: 2025.10.07 RF360 SINGAPORE PTE LTD

AI summary

Aspects of the disclosure relate to wireless communication filtering. One aspect is an apparatus including a first acoustic resonator that is part of a first bandpass filter having a first passband and coupled to a circuitry connection port and a communication connection port, and a second acoustic resonator that is part of one of a second bandpass filter or a notch filter. The apparatus further includes a third acoustic resonator that is part of the first bandpass filter, and a fourth acoustic resonator that is part of the second bandpass filter or the notch filter.