Quad-Polarized Antenna Module Array With Low-Correlation Beamforming

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Solution Overview

Problem

Conventional antenna devices face issues such as signal loss due to switching, increased area size, and reduced communication quality due to beam correlation, particularly in dual-polarized antenna modules.

Innovation Solution

A quad-polarized antenna module array is introduced, where signal paths of radiating elements with the same polarization direction are coupled, and a polarization/separation beamforming module sets phases differently to achieve spatial-polarization separation, reducing signal loss and beam correlation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a dual-polarized antenna module uses switching to share transmission and reception lines, then the area size is reduced, but signal loss occurs and noise figure deteriorates

Engineering Contradiction:

Improveantenna module areaVSAvoidsignal loss

Core Design Contradiction:

Area of stationary objectVSLoss of energy

Solution Approach 1:

The antenna module is segmented into separate transmission antenna elements and reception antenna elements, eliminating the need for switching between shared elements. This segmentation allows dedicated transmission and reception paths, reducing signal loss while maintaining compact area through optimized element arrangement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces separate transmission and reception feed networks as intermediary structures that independently connect to the radiating elements. This intermediary architecture eliminates the need for switching mechanisms, thereby reducing signal loss and noise figure while maintaining area efficiency.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of energy

If transmitting and receiving antenna modules are physically separated, then signal loss is reduced, but the area size increases

Engineering Contradiction:

Improvesignal lossVSAvoidantenna module area

Core Design Contradiction:

Loss of energyVSArea of stationary object

Solution Approach 1:

The patent merges the transmission and reception antenna modules into a single integrated antenna module structure. The radiating elements are shared between transmission and reception functions through separate feed networks, combining the benefits of physical separation (reduced signal loss) with area efficiency of integration.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The radiating elements are designed to serve dual functions as both transmission and reception elements. By making the radiating elements universal and using separate feed networks for transmission and reception, the patent achieves multi-functionality that reduces area size while maintaining low signal loss.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If multiple dual-polarized antenna modules are arrayed for MIMO, then communication quality improves, but the total area size increases

Engineering Contradiction:

Improvecommunication qualityVSAvoidantenna device area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

Multiple dual-polarized antenna modules are merged into a single quad-polarized antenna module by integrating four radiating elements with different polarization directions. This merging reduces the total number of modules needed for MIMO, thereby reducing the overall area while maintaining communication quality through diversified polarization channels.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent transitions from horizontal arraying of multiple dual-polarized modules to a vertical integration approach within a single module. By stacking and arranging radiating elements in three-dimensional space with different polarization orientations, the patent achieves MIMO functionality in a compact volume, reducing the planar area footprint.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Area of stationary object

If beams are radiated from adjacent positions with same polarization, then coverage is improved, but beam correlation increases and communication quality deteriorates

Engineering Contradiction:

Improvecoverage areaVSAvoidcommunication quality

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

Each radiating element within the quad-polarized antenna module is assigned a distinct polarization direction (vertical, horizontal, +45°, -45°). This local quality differentiation ensures that beams radiated from adjacent positions have different polarization characteristics, reducing beam correlation while maintaining coverage area through spatial diversity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12374790B2Antenna device implementing spatial-polarization separation of beams using quad-polarized antenna module array

Publication Date: 2025.07.29 KMW INC

AI summary

An antenna device is disclosed for implementing spatial-polarization separation of beams using a quad-polarized antenna module array. The antenna device including a quad-polarized antenna module array including first and second quad-polarized antenna modules in which signal paths of radiating elements having the same polarization direction are coupled, and configured to radiate first and second beams having different polarizations, and a polarization/separation beamforming module configured to set phases between signals to be different from each other so that the first beam and the second beam are spatially separated.