Antenna Emission Filter Surface Wave Suppression

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing antenna technologies face challenges in reducing surface waves, which act as side lobes and deteriorate antenna performance, particularly due to difficulties in adjusting antenna element distances and controlling power consumption in amplitude tapering methods.

Innovation Solution

An antenna design incorporating a substrate with emitter cells and emission filter cells, featuring inductor and capacitor pattern portions, is used to filter surface waves, improving antenna performance by minimizing side lobes and maximizing main lobes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If amplitude tapering is used to increase the main lobe, then antenna performance is improved, but power consumption increases due to controlling gain of PA and LNA

Engineering Contradiction:

Improveantenna performanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The invention extracts the surface wave component from the electromagnetic signals emitted by the antenna elements. By using emission filter cells with inductor and capacitor patterns, the harmful surface waves are separated and filtered out, allowing the main lobe to be maximized without requiring power-consuming amplitude tapering control of PA and LNA

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The emission filter cells act as an intermediary between the antenna elements and the radiated signals. These filter cells with specific inductor-capacitor patterns selectively attenuate surface waves while allowing the main radiation pattern to pass through, thereby improving antenna performance without additional power consumption

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the distance between antenna elements is increased to increase the main lobe, then antenna performance is improved, but Aliasing effect occurs making it difficult to distinguish main lobe from side lobe

Engineering Contradiction:

Improveantenna performanceVSAvoiddistinction between main lobe and side lobe

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The invention converts the harmful surface wave phenomenon into a beneficial filtering mechanism. By designing emission filter cells that specifically target and attenuate surface wave frequencies and patterns, the harmful aliasing effect is transformed into a selective filtering process that enhances main lobe visibility without requiring increased element spacing

Inventive Principle:

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

3Reliability

If the distance between antenna elements is decreased to increase the main lobe, then antenna performance is improved, but Coupling effect occurs causing interruptions between neighboring antennas

Engineering Contradiction:

Improveantenna performanceVSAvoidCoupling effect

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention extracts and removes the coupling effect between neighboring antenna elements by introducing emission filter cells between them. These filter cells with inductor-capacitor patterns selectively attenuate the coupled signals while allowing the desired radiation to pass, enabling closer element spacing without harmful coupling interruptions

Inventive Principle:

Principle #2Taking out (Extraction)

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 proposed solution effectively reduces surface waves, enhancing antenna performance by minimizing side lobes and maximizing main lobes, thereby improving signal emission patterns.

Implementation Method 1

each of the plurality of emission filter cells includes an inductor pattern portion electrically connected with an adjacent emission filter cell in order to form an inductor; and a capacitor pattern portion distanced from the adjacent emission cell to form a capacitor

Methodology Applied

Scientific EffectResonance: Resonance

Implementation Method 2

an emission filter having a plurality of emission filter cells formed on the substrate, to filter a surface wave caused by the emitter

Methodology Applied

Scientific EffectElectromagnetic filtering: Filter (electronic)

Data Source

PatentUS9923277B2Antenna and emission filter

Publication Date: 2018.03.20 SAMSUNG ELECTRONICS CO LTD

AI summary

An antenna and emission filter are provided. The antenna includes a substrate; an emitter on a substrate wherein the emitter is configured to emit electromagnetic signals; a feeding portion connected to the emitter; and an emission filter comprising a plurality of emission filter cells formed on the substrate in order to filter a surface wave caused by the emitter, wherein each of the plurality of emission filter cells comprises an inductor pattern portion electrically connected with an adjacent emission filter cell to form an inductor; and a capacitor pattern portion distanced from the adjacent emission cell to form a capacitor.