Composite PCB Wireless IC with Loop Electrode Antenna

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Solution Overview

Problem

RFID systems for composite printed wiring boards face complications due to the need for multiple RFID tags, leading to increased system complexity and cost, as well as signal processing load, especially with advanced electronic apparatuses.

Innovation Solution

A composite printed wiring board configuration featuring a parent board and a child board with a wireless IC element, a loop-shaped electrode, and radiators, where the loop-shaped electrode functions as both an antenna and impedance matching circuit, allowing for efficient high-frequency signal processing and transmission without the need for multiple wireless IC elements, and increasing radiant gain through electromagnetic coupling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple RFID tags are provided for parent board and child board, then information management capability is improved, but device complexity and cost increase

Engineering Contradiction:

Improveinformation management capabilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The single wireless IC element is designed to perform multiple functions: it serves as the wireless communication controller for both the parent board and child board, while the loop-shaped electrode acts as both an impedance matching circuit and a radiator (antenna). This multi-functional design eliminates the need for separate RFID tags on each board, reducing system complexity while maintaining information management capability for both boards.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the wireless IC element and loop-shaped electrode from what would traditionally be separate RFID tags into a single integrated configuration. The loop-shaped electrode merges the functions of impedance matching and radiation, while the single wireless IC element handles communication for both boards, consolidating multiple components into a unified system.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If multiple RFID tags are provided for parent board and child board, then information management capability is improved, but manufacturing cost increases

Engineering Contradiction:

Improveinformation management capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The wireless IC element is designed as a universal component that manages communication for both parent and child boards, eliminating the need to manufacture and install separate RFID tags on each board. The loop-shaped electrode serves dual purposes as both impedance matching circuit and antenna, further reducing component count and manufacturing cost.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

By merging the functions of multiple RFID tags into a single wireless IC element and loop-shaped electrode configuration, the patent reduces the number of components that need to be manufactured, assembled, and tested, directly lowering manufacturing costs while maintaining the ability to manage information on both boards.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If multiple wireless IC elements are provided, then signal processing capability is improved, but signal processing load and system complexity increase

Engineering Contradiction:

Improvesignal processing capabilityVSAvoidsignal processing load

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The single wireless IC element is designed with multi-functional capability to handle all signal processing requirements for both the parent board and child board. It processes high-frequency signals received by either board and generates appropriate response signals, eliminating the need for multiple wireless IC elements while maintaining comprehensive signal processing capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent consolidates the signal processing functions of multiple wireless IC elements into a single unit. The wireless IC element on the child board processes signals from both boards, and the loop-shaped electrode serves as a shared impedance matching circuit for both radiators, reducing the overall signal processing load distribution while maintaining capability.

Inventive Principle:

Principle #5Merging (Combining)

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 simplifies the RFID system, reduces the number of required wireless IC elements, and enhances radiant gain, making it suitable for information management of both parent and child boards with a simpler and more cost-effective setup.

Implementation Method 1

a second radiator that is coupled to the loop-shaped electrode via an electromagnetic field is provided on the parent board

Methodology Applied

Scientific EffectElectromagnetic coupling: Electromagnetic Induction

Data Source

PatentUS8941552B2Composite printed wiring board and wireless communication system

Publication Date: 2015.01.27 MURATA MFG CO LTD

AI summary

A composite printed wiring board includes a parent board and a child board that is mounted on the parent board. A wireless IC element that processes a high-frequency signal, a loop-shaped electrode that is coupled to the wireless IC element, and a first radiator that is coupled to the loop-shaped electrode are provided on the child board. A second radiator that is coupled to the loop-shaped electrode via an electromagnetic field is provided on the parent board.