Nested Resonance Network Structure for Low-Loss Multi-Band RF Filtering

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Solution Overview

Problem

Existing resonance networks in electronic devices experience increased insertion loss and degradation in consistency due to the connection of multiple resonance networks in series and/or parallel, which is necessary for implementing multi-band multi-mode functionality.

Innovation Solution

A resonance structure with a non-serial design is created by nesting multiple levels of resonance networks, allowing for mutual influence among these networks to prevent increased insertion loss and enable multi-frequency point resonance at specific frequency points, thereby broadening the suppression band.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple resonance networks are connected in series and/or parallel to implement frequency broadening and multi-frequency point suppression, then the frequency suppression capability is improved, but the insertion loss increases and consistency degrades

Engineering Contradiction:

Improvefrequency suppression capabilityVSAvoidinsertion loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent applies nesting by placing multiple resonance networks at different hierarchical levels within a unified resonance structure. Each resonance network operates at a specific frequency point, and they are nested such that higher-level networks encompass lower-level ones, creating a hierarchical resonance system that achieves multi-frequency suppression without simple serial connection

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent merges multiple resonance networks into a single integrated resonance structure where they share common electrical connection paths. This combining approach allows the networks to mutually influence each other, creating a unified resonance effect that maintains low insertion loss while achieving broad frequency suppression capability

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

Engineering Contradiction:

Improvefrequency suppression capabilityVSAvoidconsistency of resonance network

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The hierarchical nesting structure organizes resonance networks at different levels with clear functional divisions. Each level's resonance network is nested within a broader structural framework, ensuring that they operate cooperatively rather than independently, which maintains the overall consistency of the resonance network while achieving multi-frequency suppression

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent segments the frequency suppression function into multiple discrete resonance networks, each responsible for specific frequency points. This segmentation is organized hierarchically rather than in simple series, allowing each segment to maintain its characteristics while contributing to the overall consistent performance of the resonance structure

Inventive Principle:

Principle #1Segmentation

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 solution maintains low insertion loss in the passband while achieving multi-frequency point resonance, enhancing the resonance structure's frequency suppression capabilities.

Implementation Method 1

a resonance superposition mode with a non-serial structure is created by mutually nesting a plurality of levels of resonance networks... multi-frequency point resonance can be formed at a particular required frequency point

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentEP4708687A1Resonant structure, radio-frequency system and electronic device

Publication Date: 2026.03.11 HONOR DEVICE CO LTD

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AI summary

This application provides a resonance structure, a radio frequency system, and an electronic device, and relates to the field of communication technologies. The resonance structure includes at least a first resonance structure. The first resonance structure includes at least three levels of resonance networks. The respective levels of resonance networks among the at least three levels of resonance networks are electrically connected in series and/or parallel. The respective levels of resonance networks influence each other, so that a frequency point and frequency point depth of the first resonance structure are different from a frequency point and frequency point depth of at least one level of resonance network among the respective levels of resonance networks. In the resonance structure, a resonance superposition mode with a non-serial structure is created by mutually nesting a plurality of levels of resonance networks. Therefore, by means of mutual influence among the plurality of levels of resonance networks, an insertion loss in a passband of the resonance structure may not be increased as resonance frequency points are increased, and the resonance structure can form multi-frequency point resonance at a particular frequency point.