Microstrip Stub Switching for Wired and Wireless RF Links

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Solution Overview

Problem

Existing wireless communication apparatuses face increased costs and deteriorated wireless communication characteristics due to the complexity of switching between wired and wireless connections, which often requires multiple working steps and additional parts such as RF switches.

Innovation Solution

A wireless communication apparatus is configured with a microstrip line featuring first and second stubs with resonant characteristics, allowing for a simple switching mechanism between wired and wireless connections without the need for additional parts or complex soldering processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an RF switch is used to switch over wired and wireless connections, then connection switching capability is improved, but device complexity and cost increase due to additional parts

Engineering Contradiction:

Improveconnection switching capabilityVSAvoidnumber of parts

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the switching function with the microstrip line structure itself by integrating resonant circuits directly into the transmission line. The microstrip line incorporates resonant circuits that naturally switch between wired and wireless connection modes through resonance frequency matching, eliminating the need for separate RF switch components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The microstrip line is designed to perform multiple functions: it serves as both the transmission line for signal routing and as the switching mechanism through its resonant circuits. The same structural element (microstrip line with resonant circuits) handles both signal transmission and connection mode switching, reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple working steps are used for connection switching, then connection flexibility is improved, but manufacturing cost and production time increase

Engineering Contradiction:

Improveconnection flexibilityVSAvoidnumber of working steps

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The resonant circuits are pre-designed and integrated into the microstrip line structure during manufacturing. The switching capability is built-in advance through the resonant frequency characteristics of the integrated circuits, so no additional working steps are needed during assembly or operation to enable switching functionality.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The switching mechanism is merged with the transmission line structure itself. The resonant circuits are integrated directly into the microstrip line, creating a unified structure that performs both signal transmission and connection switching without requiring separate assembly steps for switching components.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If an RF switch is added for connection switching, then connection mode versatility is improved, but wireless communication characteristics deteriorate due to additional parts

Engineering Contradiction:

Improveconnection mode versatilityVSAvoidwireless communication characteristics

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The switching function is merged into the microstrip line structure itself through integrated resonant circuits. This eliminates the need for separate RF switch components that would introduce additional connection points, parasitic elements, and potential sources of signal degradation, thereby maintaining wireless communication characteristics.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The resonant circuits act as intermediary elements that enable mode switching through resonance frequency matching rather than through physical switching contacts. This intermediary mechanism avoids the direct mechanical or electronic switching contacts that would degrade signal quality, preserving wireless communication characteristics while enabling mode versatility.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 enables efficient switching between wired and wireless connections while maintaining the integrity of wireless communication characteristics, reducing costs and complexity by eliminating the need for additional parts and simplifying the connection process.

Implementation Method 1

a first stub provided on the side of the communicator and a second stub provided on the side of the antenna, which stubs have resonant characteristics

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS12266854B2Wireless communication apparatus

Publication Date: 2025.04.01 DENSO TEN LTD

AI summary

The wireless communication apparatus includes a communicator that performs at least one of transmission of signals to an antenna and reception of the signals from the antenna through a microstrip line. The microstrip line is formed with a first stub provided on the side of the communicator and a second stub provided on the side of the antenna, which stubs have resonant characteristics.