Radar Antenna Array Gain Focusing via Local Quality

Solution Overview

Problem

Conventional radar apparatuses with array antennas face issues of dispersed antenna gain and high Side Lobe Levels due to the uniform distribution of antenna elements, leading to inadequate focusing of gain in sensing directions and insufficient reduction of side lobes.

Innovation Solution

The radar apparatus employs a configuration where the middle long range transmission array antenna is the longest, and others become progressively shorter towards the sides, combined with a power divider to control power distribution, focusing antenna gain and reducing side lobes by prioritizing power to the central antenna and decreasing it towards the edges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If uniform array antenna configuration is used, then manufacturing simplicity is improved, but antenna gain focusing capability deteriorates

Engineering Contradiction:

Improveantenna configuration simplicityVSAvoidantenna gain focusing

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent applies local quality by varying the length of individual array antennas according to their position. The central antenna has the maximum length, while antennas at the edges have progressively shorter lengths. This non-uniform configuration optimizes the radiation pattern to concentrate antenna gain in the desired sensing direction, resolving the contradiction between manufacturing simplicity and gain focusing capability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent introduces asymmetry in the antenna array configuration by making the central antenna longer than the others, with a symmetric gradient decreasing toward both edges. This asymmetric length distribution creates a focused radiation pattern that improves gain concentration in the sensing direction while maintaining overall structural symmetry for manufacturing feasibility.

Inventive Principle:

Principle #4Asymmetry

2Device complexity

If uniform array antenna configuration is used, then device complexity is reduced, but side lobe level reduction deteriorates

Engineering Contradiction:

Improveantenna configuration complexityVSAvoidside lobe level

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by varying the length of individual array antennas according to their position. The central antenna has the maximum length, while antennas at the edges have progressively shorter lengths. This non-uniform configuration optimizes the radiation pattern to concentrate antenna gain in the desired sensing direction, resolving the contradiction between manufacturing simplicity and gain focusing capability.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If non-uniform array antenna configuration is used, then antenna gain focusing is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveantenna gain focusingVSAvoidantenna configuration simplicity

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent introduces asymmetry in the antenna array configuration by making the central antenna longer than the others, with a symmetric gradient decreasing toward both edges. This asymmetric length distribution creates a focused radiation pattern that improves gain concentration in the sensing direction while maintaining overall structural symmetry for manufacturing feasibility.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS9274216B2Radar apparatus and an antenna apparatus

Publication Date: 2016.03.01 HL KLEMOVE CORP

AI summary

The present invention relates to radar and antenna technique, and more particularly, to a radar apparatus and an antenna apparatus having antenna configuration of arranging a plurality of array antennas capable of concentrating antenna gain on a direction for sensing.