Super Delta Monopulse Beamformer Angle Accuracy

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Solution Overview

Problem

Conventional two-channel direction finding systems sacrifice accuracy for lower power and processing requirements, failing to match the performance of three-channel systems while increasing costs due to higher power demands and processing complexity.

Innovation Solution

Combining two information-sharing circular delta channels to form a hybrid super delta channel, which retains the accuracy of a three-channel system with the lower power and processing requirements of a two-channel system, using existing passive hardware or digital implementations to produce this super delta channel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a three-channel system is used for direction finding, then measurement precision is improved, but use of energy and device complexity increase

Engineering Contradiction:

Improveangle of arrival accuracyVSAvoidpower requirements

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent combines two circular delta channels (Δ1 and Δ2) into a single super delta channel that contains all direction finding information. This merging approach achieves three-channel system accuracy while maintaining two-channel system power consumption and hardware complexity, effectively resolving the contradiction between measurement precision and energy use.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The super delta channel serves multiple functions: it provides complete direction finding information equivalent to a three-channel system while being implemented with only two physical channels. This multi-functionality allows the system to achieve high measurement precision without the increased power requirements and device complexity of a full three-channel implementation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If a three-channel system is used for direction finding, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improveangle of arrival accuracyVSAvoidnumber of channels

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the information from two circular delta channels into a single super delta channel formulation. This combining technique achieves the measurement precision of a three-channel system while maintaining the simpler two-channel hardware architecture, thereby reducing device complexity while preserving accuracy.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent transforms the conventional two-channel circular delta formulation into a super delta channel through parameter changes in the beamforming weights and signal combinations. This parameter transformation enables the system to achieve three-channel performance with two-channel complexity, effectively resolving the contradiction between measurement precision and device complexity.

Inventive Principle:

Principle #35Parameter changes

3Use of energy by moving object

If a two-channel system is used for direction finding, then use of energy is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvepower requirementsVSAvoidangle of arrival accuracy

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The patent applies parameter changes to the beamforming weights and signal combination formulas, transforming the conventional two-channel circular delta into a super delta channel. This mathematical transformation enables the system to achieve three-channel measurement precision while maintaining the low power consumption characteristics of a two-channel system.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The super delta channel represents a composite information structure that combines the directional information from both circular delta channels (Δ1 and Δ2) into a unified channel. This composite approach achieves complete direction finding information with reduced power consumption, resolving the contradiction between measurement precision and energy use.

Inventive Principle:

Principle #40Composite materials

4Device complexity

If a two-channel system is used for direction finding, then device complexity is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvenumber of channelsVSAvoidangle of arrival accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent transforms the conventional two-channel circular delta beamforming parameters into a super delta formulation, achieving three-channel system measurement precision while maintaining two-channel device complexity. This parameter transformation resolves the contradiction between measurement precision and device complexity.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent combines the directional information from both circular delta channels into a single super delta channel, achieving complete direction finding information with reduced hardware complexity. This merging approach resolves the contradiction between measurement precision and device complexity by achieving three-channel performance with two-channel implementation.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9146309B2Super delta monopulse beamformer

Publication Date: 2015.09.29 AEROSPACE CORP

AI summary

An improved approach to direction finding using a super delta monopulse beamformer is disclosed. A super delta channel signal that includes direction finding information from two circular delta channels is formed and output by the super delta monopulse beamformer. This super delta channel signal uses only two channels, but is able to realize the accuracy of conventional three channel systems.