Integrated Orthogonal Polarization Antenna for Compact Vehicle Mounting

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Solution Overview

Problem

Existing antenna systems for vehicles that use two monopole antennas to transmit and receive orthogonal polarized waves require larger sizes and more man-hours for mounting, as they need to be spaced apart to effectively operate.

Innovation Solution

The antenna device incorporates a zeroth-order resonant antenna and a first-order resonant antenna, both sharing a base plate, with the zeroth-order resonant antenna functioning as a metamaterial to transmit and receive vertically polarized waves in all directions perpendicular to the plane of polarization, and the first-order resonant antenna transmitting and receiving horizontally polarized waves by first-order resonance, allowing for a more compact design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If two monopole antennas are spaced apart to transmit and receive orthogonal polarized waves, then the transmission and reception of orthogonal polarized waves is effective, but the system size increases and mounting complexity increases

Engineering Contradiction:

Improvetransmission and reception of orthogonal polarized wavesVSAvoidsystem size

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent combines two monopole antennas that transmit and receive orthogonal polarized waves into a single integrated antenna device. The first and second monopole antennas are integrated onto one substrate, sharing common structures such as the ground pattern and insulating layers, thereby reducing the overall system size while maintaining the capability to transmit and receive orthogonal polarized waves effectively.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated antenna device performs multiple functions within a single structure. It simultaneously supports transmission and reception of both horizontal and vertical polarized waves through the two monopole antennas, while also sharing common structural elements like the ground pattern and insulating substrate, thereby achieving multi-functionality with reduced complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

Engineering Contradiction:

Improvetransmission and reception of orthogonal polarized wavesVSAvoidmounting complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges two separate monopole antenna assemblies into a single integrated device on one substrate. This integration reduces the number of separate components that need to be mounted and positioned, thereby reducing mounting complexity and time while maintaining the effectiveness of orthogonal polarized wave transmission and reception.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single substrate hosts both monopole antennas and their supporting structures, creating a universal platform that performs multiple antenna functions. This multi-functional integration simplifies the mounting process as the entire assembly is installed as one unit rather than multiple separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

Engineering Contradiction:

Improvetransmission and reception of orthogonal polarized wavesVSAvoidassembly steps

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines the manufacturing of two monopole antenna assemblies into a single substrate fabrication process. The ground patterns, insulating layers, and antenna structures are all formed on the same substrate through integrated manufacturing steps, reducing the total number of assembly operations required while ensuring effective orthogonal polarized wave transmission and reception.

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 enables efficient transmission and reception of both orthogonal polarized waves in a smaller form factor, improving communication speed and reducing the size and mounting complexity of the antenna system, while maintaining independent operations of the antennas.

Implementation Method 1

The zeroth-order resonant antenna is configured to transmit and/or receive a first linearly polarized radio wave in all directions perpendicular to the first linearly polarized radio wave by zeroth order resonance

Methodology Applied

Scientific EffectZeroth-order resonance: Resonance

Implementation Method 2

The first-order resonant antenna is configured to transmit and/or receive a second linearly polarized radio wave perpendicular to the first linearly polarized radio wave by first order resonance

Methodology Applied

Scientific EffectFirst-order resonance: Resonance

Data Source

PatentUS11502426B2Antenna device

Publication Date: 2022.11.15 DENSO CORP

AI summary

An antenna device according to an aspect of the present disclosure includes a zeroth-order resonant antenna and a first-order resonant antenna. The zeroth-order resonant antenna includes a base plate, a platy radiation element, and a connection conductor connecting the base plate and the platy radiation element. The zeroth-order resonant antenna is configured to transmit and/or receive a first linearly polarized radio wave in all directions perpendicular to the first linearly polarized radio wave by zeroth order resonance. The first-order resonant antenna includes the base plate shared with the zeroth-order resonant antenna, and a first radiation element located on the same plane as the base plate. The first-order resonant antenna is configured to transmit and/or receive a second linearly polarized radio wave perpendicular to the first linearly polarized radio wave by first order resonance.