Antenna Device Peripheral Conductor Electromagnetic Coupling

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Solution Overview

Problem

Conventional antenna devices face challenges in enhancing radiation efficiency due to electromagnetic coupling between adjacent antennas, which affects their performance, especially in high-frequency applications.

Innovation Solution

The antenna device incorporates a dielectric layer with radiation conductors and columnar conductors, along with peripheral conductors disposed on the outer side of the columnar conductors to prevent electromagnetic coupling, thereby improving radiation efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple antennas are disposed adjacently to improve communication coverage, then communication coverage is enhanced, but electromagnetic coupling between adjacent antennas increases

Engineering Contradiction:

Improvecommunication coverageVSAvoidelectromagnetic coupling

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

A ground conductor is introduced as an intermediary element between adjacent radiation conductors. This ground conductor acts as a mediator that blocks electromagnetic coupling between the radiation conductors while maintaining their individual radiation functions, thus allowing multiple antennas to be disposed adjacently without harmful interference

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The ground conductor is divided into multiple segments, with each segment positioned between adjacent radiation conductors. This segmentation allows the ground conductor to effectively isolate multiple antenna elements while maintaining the overall antenna array structure for enhanced communication coverage

Inventive Principle:

Principle #1Segmentation

2Device complexity

If conventional antenna structures are used to simplify device design, then device complexity is reduced, but radiation efficiency decreases due to electromagnetic coupling

Engineering Contradiction:

Improveantenna structureVSAvoidradiation efficiency

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The ground conductor serves as a simple intermediary element that can be easily integrated into conventional antenna designs. By adding this ground conductor between radiation conductors, electromagnetic coupling is reduced without significantly increasing device complexity, thereby improving radiation efficiency

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The ground conductor, which might be considered an additional complex element, actually simplifies the overall system by eliminating the need for complex isolation structures. It converts the potential harm of electromagnetic coupling into a benefit by using the ground conductor's natural shielding properties to improve radiation efficiency

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 configuration effectively reduces electromagnetic coupling and enhances radiation efficiency across a wide frequency band, as demonstrated by simulation results compared to comparative examples without peripheral conductors.

Implementation Method 1

a peripheral conductor is disposed on an outer side of the plurality of columnar conductors in plan view seen from the normal direction

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Data Source

PatentUS20240332822A1Antenna device and antenna module

Publication Date: 2024.10.03 TDK CORP

AI summary

An antenna device includes: a dielectric layer; radiation conductors provided to the dielectric layer; and a plurality of columnar conductors disposed around the radiation conductor in plan view seen from a normal direction of the radiation conductor, and peripheral conductors are disposed on an outer side of the plurality of columnar conductors in plan view seen from the normal direction.