Mount Component With Sub Line Only For Low Loss Directional Coupler

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Solution Overview

Problem

Directional couplers in wireless devices face challenges with high distortion and loss due to the insertion and reflection losses associated with main signals being brought into the mount component, which can lead to signal distortion and reliability issues.

Innovation Solution

A mount component design where only the sub line is formed within the component, eliminating the need for a main line and its connection structure, thereby reducing insertion and reflection losses and minimizing signal distortion by keeping the main signal external.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the main line is provided inside the mount component and the main signal is brought into the inside of the mount component, then the directional coupler can be formed, but insertion loss in the main line and reflection loss in the connection structure increase

Engineering Contradiction:

Improvedirectional coupler formationVSAvoidinsertion loss and reflection loss

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent extracts the main line from the mount component, leaving only the sub line inside the component. The main line is formed externally on the mounting substrate, eliminating the need for internal main line connections and their associated losses.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The directional coupler is segmented into two parts: the main line formed on the mounting substrate and the sub line formed on the mount component. This segmentation allows the main signal to remain external while the mount component provides the coupling function through its sub line.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the main signal is brought into the inside of the mount component, then the directional coupler can be formed, but the strong electromagnetic field of the main signal causes distortion by reaching the substrate, electrodes, and elements

Engineering Contradiction:

Improvedirectional coupler formationVSAvoidsignal distortion

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the main signal path from the mount component interior, preventing the strong electromagnetic field from interacting with the substrate and internal elements. Only the sub line, which carries the coupled detection signal, remains inside the mount component.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If the main line is provided inside the mount component, then the directional coupler can be formed, but connection structures for the main line are required which increase complexity

Engineering Contradiction:

Improvedirectional coupler formationVSAvoidconnection structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent removes the main line and its connection structures from the mount component. The main line is formed externally on the mounting substrate, eliminating the need for internal connections, vias, and pads that would increase component complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11387536B2Mount component and module

Publication Date: 2022.07.12 MURATA MFG CO LTD

AI summary

Provided is a mount component that is for forming a directional coupler consisting of a main line and a sub line. Out of the main line and the sub line, only the sub line is formed on or in the mount component. The main line is formed on or in a mounting substrate on which the mount component is mounted and is not formed on or in the mount component. When the mount component is mounted on the mounting substrate, the main line and the sub line electromagnetically couple with each other and as a result a directional coupler is formed.