Window Antenna Interface Layer Selection by Incident Angle Scanning

Solution Overview

Problem

Existing antenna devices attached to window glass struggle with selecting an optimal interface layer due to varying radio wave transmittance based on thickness and dielectric constant, and radio waves often reflect unpredictably, making it difficult to determine the direction of incidence.

Innovation Solution

A method for selecting an interface layer using a wireless communication device with an antenna that scans beam angles, estimates the angle of incidence of radio waves, and selects the optimal interface layer based on this estimation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an interface layer is added to improve radio wave transmission, then transmittance is improved, but device complexity increases

Engineering Contradiction:

Improveradio wave transmittanceVSAvoidinterface layer selection complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The antenna device automatically measures its own incident angle and selects the appropriate interface layer without external intervention. The device performs self-diagnosis and self-configuration by measuring the angular distribution of received radio waves and autonomously determining which interface layer thickness and dielectric constant are optimal for the current installation environment.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent changes the parameters of the interface layer (thickness and dielectric constant) based on the measured incident angle. By adjusting these physical parameters according to the specific installation conditions, the system optimizes radio wave transmission for different scenarios without requiring manual selection or complex external configuration.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If manual selection of interface layer is used, then device complexity is reduced, but measurement precision of incident angle is insufficient

Engineering Contradiction:

Improveincident angle measurementVSAvoidbeam angle scanning system

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system measures the angular distribution of received radio wave power and uses this feedback information to determine the incident angle. By continuously monitoring the power distribution across different beam angles and identifying the maximum, the system achieves precise measurement of the incident angle, which then guides the selection of the appropriate interface layer.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The antenna performs dynamic beam angle scanning to measure the angular distribution of received power. This dynamic measurement process allows the system to adapt to different incident angles in real-time, providing the precision needed for optimal interface layer selection while keeping the system relatively simple through automated operation.

Inventive Principle:

Principle #15Dynamics

3Measurement precision

If beam angle scanning is performed to estimate incident angle, then measurement precision is improved, but loss of time increases

Engineering Contradiction:

Improveincident angle estimationVSAvoidtime for beam angle scanning

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system performs beam angle scanning and incident angle measurement during the installation phase before the antenna enters normal operation. By completing the time-consuming measurement process in advance, the system establishes the optimal interface layer configuration once, and then maintains this configuration during normal operation without requiring continuous scanning or additional time loss.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If interface layer thickness and dielectric constant are optimized, then radio wave transmission is improved, but ease of operation decreases

Engineering Contradiction:

Improveradio wave transmission efficiencyVSAvoidinterface layer selection

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The antenna device automatically measures its own incident angle and selects the appropriate interface layer without external intervention. The device performs self-diagnosis and self-configuration by measuring the angular distribution of received radio waves and autonomously determining which interface layer thickness and dielectric constant are optimal for the current installation environment.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent changes the parameters of the interface layer (thickness and dielectric constant) based on the measured incident angle. By adjusting these physical parameters according to the specific installation conditions, the system optimizes radio wave transmission for different scenarios without requiring manual selection or complex external configuration.

Inventive Principle:

Principle #35Parameter changes

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

Enables easy selection of an optimal interface layer, improving radio wave transmission efficiency and reducing loss by adjusting impedance matching.

Implementation Method 1

a controller that scans a beam angle of the array antenna, and acquires a first angular distribution with respect to the beam angle of reception power of radio waves arriving from a base station

Methodology Applied

Scientific EffectBeam scanning:

Implementation Method 2

estimates an incident angle of the radio waves on the basis of the first angular distribution

Methodology Applied

Scientific EffectAngular distribution analysis:

Implementation Method 3

selects the interface layer that corresponds to the result of estimating the angle of incidence... improving radio wave transmission efficiency and reducing loss by adjusting impedance matching

Methodology Applied

Scientific EffectImpedance matching:

Implementation Method 4

interface layers that are provided to the window glass... the transmittance of radio waves differs depending on the thickness and dielectric constant of the interface layer

Methodology Applied

Scientific EffectDielectric effect: Dielectric

Implementation Method 5

radio waves radiated from a base station are often reflected on the way and reach the window glass

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 6

the transmittance of radio waves differs depending on the thickness and dielectric constant of the interface layer

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentEP4668486A1Method for selecting interface layer

Publication Date: 2025.12.24 AGC INC

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Figure 2A
Figure 2B~3

AI summary

Provided is an antenna device that enables easy selection of the optimal interface layer. This method for selecting an interface layer includes selecting an interface layer of a wireless communication device that is provided in a window having window glass, the wireless communication device including an antenna that is provided to the window glass and is capable of scanning a beam angle, interface layers that are provided to the window glass, and a control unit, wherein the control unit scans the beam angle of the antenna, acquires a first angular distribution with respect to the beam angle of received power of radio waves arriving from a base station, estimates the angle of incidence of the radio waves on the basis of the first angular distribution, and selects the interface layer that corresponds to the result of estimating the angle of incidence.