Wire Layout With EBG Filtering for RF-Power Crosstalk

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Solution Overview

Problem

The challenge of electromagnetic interference (EMI) causing crosstalk between RF and power wires in electronic devices, leading to noise and malfunction, is addressed by designing an electronic device with RF and power wires configured to minimize electromagnetic interference.

Innovation Solution

The electronic device incorporates an RF signal circuit and a power transmitter with a specific configuration of power wires, power conductors, and vias to create an electromagnetic band-gap (EBG) structure that filters RF signals, reducing crosstalk.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If RF wire, power wire, and ground wire are disposed adjacent to each other to downsize the electronic device, then the area of circuit board is reduced, but cross-talk phenomenon occurs due to electromagnetic interference

Engineering Contradiction:

Improvearea of circuit boardVSAvoidcross-talk phenomenon

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

A power conductor is introduced as an intermediary element disposed between the second power wire and the RF wire. This power conductor acts as a shield that blocks electromagnetic interference from the RF wire from coupling into the power wires, thereby preventing cross-talk while allowing the wires to remain adjacent for miniaturization

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful electromagnetic field from the RF wire into a beneficial shielding effect. By placing a conductive power conductor between the RF wire and power wires, the electromagnetic field is redirected and contained, transforming potential interference into a protective barrier that actually reduces cross-talk

Inventive Principle:

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

2Object-generated harmful factors

If shielding is added to prevent cross-talk between RF wire and power wire, then electromagnetic interference is reduced, but the size and cost of cables and circuit boards increase

Engineering Contradiction:

Improveelectromagnetic interferenceVSAvoidsize of circuit board

Core Design Contradiction:

Object-generated harmful factorsVSArea of stationary object

Solution Approach 1:

The power conductor performs multiple functions simultaneously: it serves as a power transmission conductor and as an electromagnetic shield. This multi-functionality eliminates the need for separate shielding structures, reducing overall device size and component count while maintaining EMI protection

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The shielding function is merged with the power transmission function by using the power conductor itself as the shield. Instead of adding a separate shielding layer or component, the existing power conductor is positioned to perform both its electrical function and electromagnetic interference protection

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 effectively filters RF signals, reducing crosstalk and maintaining device performance while minimizing the size and cost of cables and circuit boards.

Implementation Method 1

the second power wire and the power conductor may be configured to have a capacitance value, the first via may be configured to have an inductance value, and the capacitance and inductance values may be configured to filter a frequency of the RF signal

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

Methodology Applied

Scientific EffectInductance: Inductor

Implementation Method 3

The power transmitter includes a first power wire including a conductive material, a second power wire including a conductive material and electrically spaced apart from the first power wire in a first direction, a power conductor disposed between the first power wire and the second power wire in parallel with the second power wire and electrically spaced apart from the second power wire, and at least one first via electrically connecting the first power wire and the power conductor

Methodology Applied

Scientific EffectElectromagnetic interference filtering: Filter (electronic)

Data Source

PatentUS12500970B2Electronic device including wire

Publication Date: 2025.12.16 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device including wires is provided. The electronic device, which includes multiple wires through which direct current (DC) power and at least one radio frequency (RF) signal are transmitted, includes an RF transmitter configured to transmit the RF signal, and a power transmitter configured to transmit the DC power. The power transmitter includes a first power conductor including a conductive material, a second power wire including a conductive material and electrically spaced apart from the first power conductor in a first direction, a power conductor disposed between the first power conductor and the second power wire in parallel with the second power wire and electrically spaced apart from the second power wire, and at least one first via electrically connecting the first power conductor and the power conductor.