IFEC Antenna Layout With Localized Beams to Reduce Interference

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Solution Overview

Problem

Existing wireless connectivity systems in commercial passenger vehicles suffer from signal interferences and congestion due to fixed locations of wireless transceivers, leading to poor signal quality and unsuccessful connection issues, which negatively impact passenger experience.

Innovation Solution

Decoupling wireless transceivers from media playback devices and positioning them at various locations within the vehicle, such as armrests, headrests, and passenger controllers, to create localized radio zones with customized beam patterns that minimize interference and optimize signal distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If wireless transceivers are fixed inside media playback devices, then device integration is simplified, but signal interference and congestion increase

Engineering Contradiction:

Improvedevice integrationVSAvoidsignal interference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the wireless transceiver from the media playback device and positions it separately in the armrest. This separation allows the transceiver to have an unobstructed upward beam pattern without being blocked by the monitor or other device components, thereby reducing signal interference while maintaining integration simplicity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The armrest serves as an intermediary structure that holds the wireless transceiver in an optimal position. By using the armrest as a mounting location, the system achieves both easy integration (the transceiver is still part of the seat assembly) and improved signal distribution (the transceiver is positioned away from interfering components)

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If wireless transceivers are positioned to optimize signal distribution, then wireless connectivity quality improves, but device complexity increases

Engineering Contradiction:

Improvewireless connectivity qualityVSAvoidtransceiver positioning complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by giving each transceiver a specific upward-oriented beam pattern tailored to its location in the armrest. This localized optimization ensures that each transceiver serves its immediate area effectively, improving overall wireless connectivity quality without requiring complex system-wide coordination

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The wireless coverage area is segmented into multiple zones, each served by a transceiver in a separate armrest. This segmentation allows each transceiver to be independently optimized for its local area, simplifying the overall system design while maintaining high reliability across the entire vehicle

Inventive Principle:

Principle #1Segmentation

3Area of stationary object

If multiple transceivers operate with omnidirectional patterns, then coverage area is maximized, but signal overlap and congestion increase

Engineering Contradiction:

Improvecoverage areaVSAvoidsignal overlap

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent introduces asymmetry by using unidirectional (upward-oriented) beam patterns instead of symmetric omnidirectional patterns. Each transceiver in the armrest radiates signals primarily upward and outward, creating an asymmetric coverage pattern that overlaps minimally with adjacent transceivers while still providing comprehensive coverage when combined

Inventive Principle:

Principle #4Asymmetry

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 approach reduces signal overlap and congestion, providing more reliable wireless connectivity and enhancing passenger experience by ensuring consistent and efficient communication across the vehicle.

Implementation Method 1

wireless transceivers disposed outside of the monitors and configured to transceive radio signals that have beam patterns defined according to locations of the wireless transceivers relative to passenger seats

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS12490111B2Antenna system of in-flight entertainment and communication system

Publication Date: 2025.12.02 PANASONIC AVIONICS CORP

AI summary

This patent document describes techniques related to antenna system of an in-flight entertainment and communication (IFEC) system provided in a commercial passenger vehicle. The antenna system comprises monitors associated with passenger seats on the commercial passenger vehicle and configured to display entertainment content for passengers, wireless transceivers disposed outside of the monitors and configured to transceive radio signals that have beam patterns defined according to locations of the wireless transceivers relative to passenger seats, and one or more processors communicatively coupled to the wireless transceivers and configured to support the wireless connectivity for the passengers through the wireless transceivers.