· Orion Delta Team · Technology  · 3 min read

Invisible Transparent Antennas

A case study on the design, fabrication and characterisation of optically transparent antennas.

A case study on the design, fabrication and characterisation of optically transparent antennas.

Transparent antennas represent a groundbreaking advancement in antenna technology, providing the ability to integrate high-performance antenna functionality into visible surfaces without compromising aesthetics. These antennas achieve unparalleled optical transparency, conductivity, and performance across a wide range of applications, redefining the possibilities for antenna integration in automotive, aerospace, consumer electronics, and telecommunications.

The Benefits of Transparent Antennas

Transparent antennas provide several unique advantages:

  • High Optical Transparency: With transmittance levels of up to 98%, these antennas remain invisible to the naked eye, enabling seamless integration into surfaces such as glass or plastic.
  • Exceptional Conductivity: Achieving low sheet resistance, transparent antennas ensure superior efficiency.
  • Lightweight Design: Transparent antennas are lightweight, making them ideal for applications requiring portability and reduced material usage.
  • Sustainable Solution: Using a fraction of the metal required for conventional antennas, these designs offer an environmentally friendly alternative while maintaining high performance.
  • Customization: Fully customizable for multi-band and ultra-wideband frequencies, transparent antennas deliver exceptional radiation performance and are adaptable for specific frequency bands and use cases.

Cutting-Edge Applications

Transparent antennas are revolutionizing industries by enabling advanced functionality in previously challenging environments. Key applications include:

  • Automotive and Transportation:
    • Vehicle-to-vehicle communication for autonomous driving.
    • Integration with radar/lidar systems for collision avoidance (77 GHz).
    • Replacement of traditional shark-fin or monopole antennas for GPS, Wi-Fi, 4G, and 5G communication.
    • Compatibility with Advanced Systems: designed to integrate with LIDAR, radar, and camera systems, meeting the needs of modern communication and sensing technologies.
  • Smartphones and Telecommunications:
    • mm-wave 5G communication (26–28 GHz) for smartphones, wearables, and smart glasses.
    • Indoor digital TV antennas (400–800 MHz) with transparent designs for aesthetic integration.
  • Aerospace:
    • Transparent antennas for satellite communication, particularly on solar panels to maximise light exposure.
  • Augmented Reality:
    • Transparent antennas embedded in AR glasses to reduce bulk and enhance high-band I/O communication.
    • RF-based eye-tracking.
  • RFID Tags:
    • Transparent RFID tags for inventory management and tracking, combining functionality with discreet integration.

Transparent antenna prototype with measurement set-up

Our Unique Expertise and Innovation

Our transparent antenna solutions are backed by proprietary IP and expertise to address critical challenges in the field. These include:

  • Interfacing with PCBs: seamlessly integrating transparent antennas with microstrip lines and integrated circuits to ensure optimal performance.
  • High-Frequency Modelling: expertise in modelling and incorporating effects and impedance up to 90 GHz, ensuring reliability and performance across a wide frequency range.
  • Radiation efficiency: overcoming traditional trade-offs between transparency and efficiency using advanced design methods and custom mesh designs.
  • Integration with transparent heaters: combined RF communications and simultaneous defogging of the camera or sensor region.
  • Performance Characterization: RF characterisation, environmental testing, optical and electrical performance characterisation.

To support volume fabrication, we collaborate with trusted partners, ensuring high-quality production capabilities that scale to meet the demands of our clients. This partnership approach enables us to deliver reliable and efficient solutions for a wide range of applications.

Transparent antenna integration example

A Comprehensive Solution

Our metal mesh transparent antennas combine innovation, customisation, and performance to redefine antenna design. With capabilities ranging from rapid prototyping to large-scale production, we ensure a reliable, scalable, and efficient solution for the demands of next-generation communication and sensing technologies.

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