Antenna System With Via-Coupled Decoupling Elements

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Solution Overview

Problem

Current antenna designs in mobile devices often suffer from interference between antennas operating at similar frequencies, leading to degraded communication quality due to mutual coupling.

Innovation Solution

The proposed antenna system incorporates a dielectric substrate with two dipole antenna elements positioned perpendicularly on opposite surfaces, utilizing conductive via elements and additional metal elements to decouple the antennas, along with specific radiation and decoupling portions to suppress mutual coupling, thereby increasing isolation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple antennas are placed in a mobile device for wireless communication, then the wireless communication coverage and functionality are improved, but mutual coupling between antennas operating at similar frequencies occurs, degrading communication quality

Engineering Contradiction:

Improvewireless communication coverageVSAvoidcommunication quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent positions the first and second dipole antenna elements on opposite surfaces of a dielectric substrate, utilizing the third dimension (vertical separation) to reduce mutual coupling. The antennas are oriented perpendicular to each other, with the first antenna element on the first surface and the second antenna element on the second surface, effectively using spatial dimensionality to achieve isolation while maintaining multi-antenna functionality

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent introduces decoupling structures including conductive via elements and additional metal elements that act as intermediaries between the two antenna elements. These intermediary structures are coupled to both antenna elements through conductive vias and are positioned between them, serving to cancel mutual coupling effects and improve isolation without compromising the wireless communication coverage provided by multiple antennas

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If antennas with the same or similar operation frequencies are used to cover wireless communication areas, then the communication functionality is enhanced, but interference between antennas increases, degrading signal quality

Engineering Contradiction:

Improvecommunication functionalityVSAvoidsignal interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful mutual coupling effect into a beneficial decoupling mechanism by introducing additional metal elements and conductive via structures that are specifically designed to cancel the coupling between antennas. The decoupling structures are coupled to both antenna elements and are positioned to create opposing electromagnetic fields that neutralize the interference, thereby allowing same-frequency antennas to coexist without degradation of communication functionality

Inventive Principle:

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

3Volume of moving object

If dipole antenna elements are positioned close to each other in a mobile device, then the device size is reduced, but mutual coupling between the antennas increases, reducing isolation

Engineering Contradiction:

Improvedevice sizeVSAvoidantenna isolation

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent achieves compact device size by positioning antenna elements on opposite surfaces of a thin dielectric substrate, utilizing vertical separation rather than horizontal spacing. The first dipole antenna element is disposed on the first surface while the second dipole antenna element is disposed on the second surface, allowing close proximity in the planar dimensions while maintaining isolation through vertical dimensionality

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent introduces decoupling structures including conductive via elements and additional metal elements that serve as intermediaries between closely positioned antenna elements. These intermediary structures are coupled to both antenna elements through conductive vias and are positioned between them to cancel mutual coupling effects, enabling high isolation even when antennas are positioned close together to minimize device volume

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11011855B2Antenna system

Publication Date: 2021.05.18 WISTRON NEWEB CORP

AI summary

An antenna system includes a dielectric substrate, a first dipole antenna element, a second dipole antenna element, a first additional metal element, a second additional metal element, first conductive via elements, and second conductive via elements. The first dipole antenna element and the first additional metal element are disposed on a first surface of the dielectric substrate. The first dipole antenna element includes a first radiation element and a second radiation element. The second dipole antenna element and the second additional metal element are disposed on a second surface of the dielectric substrate. The second dipole antenna element includes a third radiation element and a fourth radiation element. The first additional metal element is coupled through the first conductive via elements to the third radiation element. The second additional metal element is coupled through the second conductive via elements to the first radiation element.