Antenna Arrangement With Capacitive Strips for Scattering Cancellation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing antenna arrangements face performance disturbances due to the presence of conductive structures like wires or second antennas positioned in front of the primary antenna, necessitating a solution that minimizes interference while maintaining compactness and cost-effectiveness.

Innovation Solution

An antenna arrangement with a planar layer having an oblong conducting structure and capacitive strips on opposing longitudinal portions, designed to cancel out disturbances from the conducting structure by matching capacitance to inductance, allowing the first antenna to operate without interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If a second antenna or wire structure is placed in front of the first antenna to optimize space utilization, then compactness and space-efficiency are improved, but the operation and performance of the first antenna are disturbed

Engineering Contradiction:

Improvespace utilizationVSAvoidantenna performance

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent applies this principle by using the conducting structure (which initially causes harmful scattering) as part of the antenna arrangement itself. The capacitive strips are positioned to work with the conducting structure's scattered fields, converting the harmful scattering into useful signal components that can be received or utilized by the antenna system.

Inventive Principle:

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

Solution Approach 2:

The capacitive strips serve as an intermediary element between the conducting structure and the first antenna. These strips are strategically positioned to interact with the electromagnetic fields scattered by the conducting structure, mediating the interaction and transforming the scattered fields into forms that do not disturb the first antenna's operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If conductive structures are placed within the illumination field of the first antenna, then compact arrangement is achieved, but scattering and disturbance to the first antenna increase

Engineering Contradiction:

Improvearrangement compactnessVSAvoidscattering

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful scattering effect into a beneficial feature by positioning capacitive strips that capture and utilize the scattered electromagnetic fields. The conducting structure's scattering is transformed into signal components that can be constructively used by the antenna system, particularly for receiving signals in compact configurations.

Inventive Principle:

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

Solution Approach 2:

The patent changes the electromagnetic parameters (capacitance and inductance) of the capacitive strips to match specific values that optimize their interaction with the conducting structure's scattered fields. By tuning these parameters, the system transforms the scattering characteristics from harmful to useful, enabling compact arrangements without performance degradation.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If capacitive strips are added to cancel scattering from conducting structures, then antenna performance is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveantenna operationVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the capacitive strips with the existing conducting structure and antenna components into a single integrated arrangement. The capacitive strips are positioned to work in conjunction with the conducting structure, creating a unified system where the scattering cancellation function is achieved through the combined geometry and electromagnetic interaction of all components rather than adding separate complex subsystems.

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

The solution provides a compact, cost-effective arrangement with reduced scattering and maintained functionality, achieving up to 15 dB less disturbance compared to conventional solutions.

Implementation Method 1

a plurality of capacitive strips arranged on opposing longitudinal portions of said planar layer extending along a length of said conducting structure

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

matching capacitance to inductance, allowing the first antenna to operate without interference

Methodology Applied

Scientific EffectElectromagnetic Induction: Electromagnetic Induction

Data Source

PatentUS20250309524A1An antenna arrangement

Publication Date: 2025.10.02 SAAB AB

AI summary

The present disclosure relates to an antenna arrangement including a first antenna configured to operate within a first frequency band and a planar layer having an oblong conducting structure attached thereon, the conducting structure being arranged within an illumination-field of the first antenna. Further including a plurality of capacitive strips arranged on opposing longitudinal portions of the planar layer extending along a length of the conducting structure, the longitudinal portions being separated by the conducting structure.