Vehicle Bumper Radar Antenna With Tx-Rx Reflection Isolation

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Solution Overview

Problem

Conventional light-based sensors, such as cameras and LIDAR, perform poorly in adverse weather conditions, limiting their effectiveness in autonomous and robotic systems.

Innovation Solution

Implementing a radar antenna integrated into the vehicle bumper fascia to enhance perception and navigation capabilities under inclement weather conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If light-based sensors (cameras, LIDAR) are used for autonomous perception, then the system can achieve good performance in clear weather conditions, but the sensors perform poorly under adverse weather conditions such as rain, snow, hail, or poor visibility

Engineering Contradiction:

Improvesensor reliabilityVSAvoidweather condition adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent integrates multiple sensor types (cameras, LIDAR, and radar) into a single autonomous perception system. Each sensor type operates effectively in different weather conditions, and their data is fused to provide reliable perception across all environments. The radar sensor specifically complements light-based sensors by maintaining functionality in adverse weather where cameras and LIDAR fail.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent employs a composite sensor system that combines different sensing technologies with complementary characteristics. By integrating radar (electromagnetic wave-based) with light-based sensors (optical), the system creates a robust multi-modal perception architecture that overcomes the limitations of individual sensor types in specific weather conditions.

Inventive Principle:

Principle #40Composite materials

2Shape

If radar antenna is integrated into the vehicle bumper fascia, then the aesthetic appearance and aerodynamic profile are improved, but the radiation pattern may be distorted by the bumper fascia structure

Engineering Contradiction:

Improvevehicle aerodynamic profileVSAvoidradiation pattern accuracy

Core Design Contradiction:

ShapeVSMeasurement precision

Solution Approach 1:

The patent introduces a radome as an intermediary component between the radar antenna and the external environment. The radome is specifically designed to be transparent to radar frequencies while providing the necessary structural integration with the bumper fascia. This mediator allows the antenna to maintain its radiation pattern integrity while being aesthetically integrated into the vehicle body.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The radome is implemented as a thin, flexible shell structure that can be seamlessly integrated into the bumper fascia design. This thin-film approach maintains the vehicle's aerodynamic profile and aesthetic appearance while allowing radar waves to pass through with minimal distortion, thus preserving the radiation pattern accuracy.

Inventive Principle:

Principle #30Flexible shells and thin films

3Shape

If the radar antenna is hidden behind the bumper fascia without cut-out windows, then the aesthetic appearance is improved, but the isolation between transmit and receive antenna arrays degrades

Engineering Contradiction:

Improveaesthetic appearanceVSAvoidsignal interference

Core Design Contradiction:

ShapeVSObject-generated harmful factors

Solution Approach 1:

The radome serves as a mediator that enables the radar system to be hidden behind the bumper fascia while maintaining signal isolation. The radome's electromagnetic properties are specifically engineered to allow transmit and receive signals to pass through independently, preventing harmful interference while preserving aesthetic appearance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent utilizes electromagnetic parameter changes within the radome structure to manage signal isolation. By carefully controlling the dielectric properties, thickness, and material composition of the radome, the system achieves frequency-selective transmission that maintains Tx-Rx isolation while allowing the antenna array to be concealed behind the bumper fascia.

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

The radar antenna provides reliable environmental perception and navigation in various weather conditions, supporting autonomous and robotic systems' functionality.

Implementation Method 1

a radar antenna integrated into the vehicle bumper fascia

Methodology Applied

Scientific EffectRadar: Radar

Data Source

PatentUS12451595B2Radar antenna for vehicle bumper fascia

Publication Date: 2025.10.21 INTEL CORP

AI summary

For example, a system may include a radome to be attached to a vehicle bumper fascia; an antenna array on a Printed Circuit Board (PCB), the antenna array is between the PCB and the radome, the antenna array comprising a Transmit (Tx) antenna configured to transmit Tx radar signals via the radome and the vehicle bumper fascia, and a receive (Rx) antenna configured to receive Rx radar signals based on the Tx radar signals; and an absorbing spacer in a spacer area between the PCB and the radome, the spacer area separating the Tx antenna from the Rx antenna, the absorbing spacer configured to absorb reflected signals formed by reflection of the Tx radar signals from the vehicle bumper fascia.