Autonomous driving relies heavily on high-precision positioning—even minor errors can lead to safety risks. A leading global automaker developing L2+ autonomous driving models encountered significant positioning challenges in complex urban environments, leading them to partner with Tengxiang Electronics, a national high-tech enterprise specializing in RF antenna solutions.

Client Background

The client is a well-known automaker with a presence in over 50 countries, focusing on advancing autonomous driving technology. Their new L2+ model required a high-precision positioning antenna that could operate reliably in diverse scenarios, from urban canyons to tunnel entrances, with strict size constraints to fit the vehicles sleek design.

Core Pain Points

1. Positioning Inaccuracy: Traditional GNSS antennas failed to achieve centimeter-level precision in urban canyons (due to signal blocking by buildings) and tunnel entrances.

2. Electromagnetic Interference: Signal distortion caused by electromagnetic noise from the vehicles engine, radar, and other electronic systems.

3. Size Limitations: The antenna needed to be ultra-thin (thickness <8mm) to fit the vehicles roof without compromising aerodynamics or design aesthetics.

4. Durability Requirements: Resistance to extreme temperatures (-30℃ to 70℃) and long-term vibration during vehicle operation.

Tengxiangs Custom Solution

Drawing on our 50+ patents and 20-person R&D team (with 20+ years of experience), Tengxiang developed a tailored solution:

1. High-Precision Design: Integrated a high-gain GNSS chip compatible with GPS, BeiDou, and GLONASS satellite systems, achieving centimeter-level positioning accuracy through advanced signal processing algorithms.

2. Anti-Interference Technology: Added a multi-layer electromagnetic shielding layer to isolate noise from vehicle electronics, ensuring signal stability in high-interference environments.

3. Compact & Durable Structure: Customized a low-profile FPC (Flexible Printed Circuit) design with a thickness of only 7.5mm, meeting the clients aerodynamic and design requirements. The antenna also passed salt spray, thermal shock, and vibration tests to ensure durability.

4. Automotive-Grade Compliance: Strictly followed IATF16949 quality management system standards throughout the development and production process.

Implementation & Testing

Tengxiangs R&D team collaborated with the clients autonomous driving department for three months, conducting multiple rounds of prototype optimization. The antenna was tested in various real-world scenarios: urban canyons in major cities, tunnel entrances, and high-speed highways.

In-house testing included 20+ items such as signal reception sensitivity, positioning accuracy, EMC compatibility, and long-term reliability. The final prototype achieved 99.8% signal retention in urban canyons and maintained centimeter-level positioning even in weak signal environments.

Project Outcomes

Precision & Stability: The antenna delivered consistent centimeter-level positioning accuracy, with zero positioning drift in urban canyons and tunnel entrances.

Model Integration: Successfully integrated into 3 of the clients L2+ autonomous driving models, supporting mass production for 2 consecutive years.

Market Recognition: The clients autonomous driving models received high praise for their positioning reliability, with the antenna contributing to a 15% improvement in user satisfaction.

Tengxiangs custom GNSS antennas for autonomous driving combine precision, durability, and compact design. Contact us to explore how our OEM/ODM capabilities can support your autonomous vehicle projects.