Staggered Array Antenna Layout for Grating Lobe and Polarization Isolation

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Solution Overview

Problem

Array antennas suffer from grating lobes and cross polarization leakage, which degrade beam steering accuracy and data throughput in MIMO communication systems.

Innovation Solution

The array antenna configuration includes alternately disposed first and second element units with specific distances and dummy patches to reduce grating lobes and cross polarization leakage, utilizing multilayer boards and staggered vias to maintain symmetry and electrical signal integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If antenna elements are arranged in a regular grid pattern, then the array antenna structure is simple and easy to manufacture, but grating lobes occur in the beam pattern causing beam steering errors

Engineering Contradiction:
Improvearray antenna structure simplicityVSAvoidbeam steering accuracy
Core Design Contradiction:
Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent applies asymmetry by offsetting the position of antenna elements from a regular grid pattern. Specifically, elements in alternating rows are shifted by half an element spacing in opposite directions, creating an asymmetric arrangement that eliminates grating lobes while maintaining manufacturing feasibility through systematic positioning

Inventive Principle:
Principle #4Asymmetry

2Productivity

If orthogonal polarization is used to separate transmit and receive antennas, then data throughput is doubled in MIMO communication, but cross polarization leakage occurs between polarizations

Engineering Contradiction:
Improvedata throughputVSAvoidcross polarization leakage
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by adding polarization isolation structures (such as polarization separation walls or ground planes) between orthogonally polarized antenna elements. These local structures are strategically placed to suppress cross-polarization coupling only where needed, maintaining the benefits of orthogonal polarization for MIMO throughput while reducing harmful leakage through localized isolation measures

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS20260031530A1Array antenna for reducing grating lobe and cross polarization leakage
Publication Date: 2026.01.29 HANWHA NXMD CORPORATION
  • US20260031530A1 patent drawing
  • US20260031530A1 patent drawing
  • US20260031530A1 patent drawing

AI summary

Disclosed is an array antenna for reducing grating lobe and cross polarization leakage. The array antenna includes a plurality of first element units disposed in a first column, each of the first element units including two elements having a specific distance that differs from the distance (dy) of one element by a predetermined value and a plurality of second element units disposed in a second column adjacent to the first column, each of the second element units including two elements having the specific distance, the second element units being disposed spaced apart from the first element units by the distance (dy) of one element, the first element units and the second element units being alternately and repeatedly disposed in a row direction, wherein each of the first and second element units includes one or more dummy patches configured to have no electrical signal connection.