Dual-Polarized Antenna Lamination Alignment Precision

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Solution Overview

Problem

Dual-polarized antennas face degradation in characteristics such as cross polarization discrimination due to misalignment between laminated member layers, leading to decreased performance.

Innovation Solution

The design includes a first feed probe and a slot with mutual longitudinal directions generally parallel, and a second feed probe with a longitudinal direction orthogonal to the slot, which reduces position misalignment errors and suppresses cross polarization components, thereby improving cross polarization discrimination and port isolation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple feed probes and ground conductors are laminated in a dual-polarized antenna, then the antenna can radiate two polarized waves crossing at a predetermined angle, but misalignment between laminated member layers degrades cross polarization discrimination and other antenna characteristics

Engineering Contradiction:

Improvedual-polarized radiation capabilityVSAvoidalignment precision between laminated layers

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent combines multiple feed probes and ground conductors into a single integrated laminated structure where all components are formed on the same substrate plane. This merging approach eliminates the need for separate laminated layers that could misalign, thereby maintaining dual-polarized radiation capability while preventing alignment degradation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent transitions from a three-dimensional stacked lamination structure to a two-dimensional planar configuration where feed probes and ground conductors are arranged on the same substrate plane. This dimensional change eliminates layer-to-layer alignment issues while preserving the dual-polarized radiation function through orthogonal probe orientations.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Volume of moving object

If feed probes and ground conductors are positioned at different levels in laminated layers, then the antenna structure can be compact, but position misalignment errors increase and suppress cross polarization components

Engineering Contradiction:

Improveantenna structure compactnessVSAvoidposition alignment accuracy

Core Design Contradiction:

Volume of moving objectVSMeasurement precision

Solution Approach 1:

The patent rearranges components from a vertical stacked configuration to a horizontal planar layout on the same substrate plane. This dimensional transformation maintains structural compactness through optimized two-dimensional spacing while eliminating vertical misalignment errors that occur in multi-layer laminated structures.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If laminated members are used to create dual-polarized antenna, then the antenna can achieve port isolation, but misalignment degrades port isolation and other characteristics

Engineering Contradiction:

Improveport isolation performanceVSAvoidlaminated layer alignment

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent integrates all feed probes and ground conductors into a single laminated layer, eliminating multi-layer alignment issues. This merging maintains port isolation performance by ensuring precise relative positioning between orthogonal probes and their corresponding ground conductors without the degradation caused by laminated layer misalignment.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration enhances the precision of the antenna's position alignment, preventing degradation of antenna characteristics like cross polarization discrimination and port isolation, and improves the overall performance of the dual-polarized antenna.

Implementation Method 1

a first feed probe positioned under the first ground conductor in the lamination direction. The first feed probe excites the metal patch

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Implementation Method 2

a second feed probe disposed under the second ground conductor in the lamination direction, the second feed probe being generally perpendicular to the slot. The second feed probe excites the metal patch

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS11056794B2Dual-polarized antenna

Publication Date: 2021.07.06 KK TOSHIBA

AI summary

A method for producing a dual-polarized antenna includes providing first, second and third dielectric substrates with first and second main surfaces. The method includes patterning a conductive film on the first main surface of the first dielectric substrate to form a first ground conductor having an opening and a metal patch as a radiation element, the patch aligned to the opening in a lamination direction, patterning a conductive film on the first main surface of the second dielectric substrate to form a first feed probe configured to excite the metal patch, patterning a conductive film on the second main surface of the second dielectric substrate to form a second ground conductor having a slot generally parallel to the first feed probe, and patterning a conductive film on the second main surface of the third dielectric substrate to form a second feed probe generally perpendicular to the slot.