Multi-Antenna Ground Segmentation for Better Isolation on PCB Frames

Solution Overview

Problem

The integration of multiple antennas in a limited space within electronic devices leads to interference and reduced radiation performance due to difficulty in securing isolation between antennas, making it challenging to optimize resonance formation in desired frequency bands.

Innovation Solution

A structural design is implemented in the electronic device, featuring a housing with a first and second plate, a side member, and a metal structure, where conductive portions are connected to both a printed circuit board and a metal structure through specific paths, physically separating ground parts of the antennas to enhance isolation and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple antennas are integrated in a limited space, then the wireless communication capability is enhanced, but the isolation between antennas is reduced causing interference and degraded radiation performance

Engineering Contradiction:

Improvewireless communication capabilityVSAvoidantenna interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The ground part is divided into multiple independent ground parts, each corresponding to a specific antenna. This segmentation prevents ground current interaction between adjacent antennas, thereby reducing interference while maintaining multiple antenna functionality in limited space

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A non-conductive member is introduced as an intermediary between adjacent antennas to physically separate their respective ground parts. This non-conductive barrier prevents electromagnetic coupling between ground parts of different antennas, reducing interference without requiring increased spacing between antennas

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple antennas are integrated in a limited space, then the wireless communication capability is enhanced, but the radiation performance is reduced

Engineering Contradiction:

Improvewireless communication capabilityVSAvoidradiation performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The ground part is divided into multiple independent ground parts, each corresponding to a specific antenna. This segmentation prevents ground current interaction between adjacent antennas, thereby reducing interference while maintaining multiple antenna functionality in limited space

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A non-conductive member is introduced as an intermediary between adjacent antennas to physically separate their respective ground parts. This non-conductive barrier prevents electromagnetic coupling between ground parts of different antennas, reducing interference without requiring increased spacing between antennas

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If multiple antennas are integrated in a limited space, then the wireless communication capability is enhanced, but the resonance formation in desired frequency bands cannot be optimized

Engineering Contradiction:

Improvewireless communication capabilityVSAvoidresonance formation optimization

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The ground part is divided into multiple independent ground parts, each corresponding to a specific antenna. This segmentation prevents ground current interaction between adjacent antennas, thereby reducing interference while maintaining multiple antenna functionality in limited space

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A non-conductive member is introduced as an intermediary between adjacent antennas to physically separate their respective ground parts. This non-conductive barrier prevents electromagnetic coupling between ground parts of different antennas, reducing interference without requiring increased spacing between antennas

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12470648B2Plurality of antennas and electronic device comprising same

Publication Date: 2025.11.11 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is provided. The electronic device includes a housing including a first plate, a second plate, and a side member, a metal structure of which a part is connected to the side member, and a printed circuit board. The side member includes a first conductive portion, a second conductive portion, a third conductive portion, a first segment formed between the first conductive portion and the second conductive portion, and a second segment formed between the first conductive portion and the third conductive portion. The first conductive portion is connected to a first ground part disposed on the printed circuit board through a first path, and is connected to a second ground part disposed on the metal structure through a second path spaced from the first path by a specific distance.