Concentric Dual-Band Antenna Array with Interleaved Elements

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Concentric dual-band antenna arrays face limitations due to poor isolation and malformed sidelobes and grating lobes, as well as the inability to achieve optimal element spacing for both low and high frequency elements, restricting their usefulness in multiband applications.

Innovation Solution

A dual-band antenna array design featuring concentric, co-located, and interleaved elements with orthogonal polarization capabilities, utilizing substrates with different dielectric constants to optimize spacing and reduce the footprint, allowing for simultaneous operation in S- and X-bands with improved isolation and gain patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If concentric dual-band antenna arrays use uniform substrate with low frequency elements surrounding high frequency elements, then the array footprint is reduced, but the element spacing cannot achieve optimal values for both frequencies resulting in poor isolation and malformed radiation patterns

Engineering Contradiction:

Improvearray footprintVSAvoidisolation between antenna elements

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent applies local quality by using different dielectric substrates for low frequency and high frequency antenna elements. Each frequency band has its own optimized substrate with appropriate dielectric constant, allowing each element type to achieve optimal electrical spacing and radiation characteristics while maintaining compact physical footprint through the concentric arrangement.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If concentric dual-band antenna arrays use uniform substrate, then manufacturing is simplified, but optimal element spacing cannot be achieved for both low and high frequency elements simultaneously

Engineering Contradiction:

Improvesubstrate uniformityVSAvoidelement spacing precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

Different dielectric substrates are used for low and high frequency elements to achieve precise electrical spacing optimization for each band. The concentric geometry and co-located arrangement maintain manufacturing simplicity while the localized substrate differentiation enables precise control of electrical dimensions for each frequency band independently.

Inventive Principle:

Principle #3Local quality

3Device complexity

If concentric dual-band antenna arrays use single circular polarization, then the design is simplified, but the versatility and flexibility of the system is limited

Engineering Contradiction:

Improvepolarization capabilityVSAvoidsystem flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The antenna elements are designed with dual orthogonal polarization capabilities, allowing each element to support both vertical and horizontal linear polarizations. This multi-functional design enables the same antenna structure to serve multiple communication protocols and polarization requirements, significantly enhancing system versatility without adding separate antenna structures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10811772B2Concentric, co-located and interleaved dual band antenna array

Publication Date: 2020.10.20 UNITED STATES OF AMERICA THE AS REPRESENTED BY THE SEC OF THE ARMY

AI summary

An antenna array comprising a plurality of concentric low frequency elements, where each low frequency element circumscribes a first high frequency element; and a plurality of second high frequency elements interleaved with the plurality of concentric low frequency elements to maintain optimal electrical spacing between both the low frequency elements and the high frequency elements at two disparate frequencies.