Country for PR: Japan
Contributor: Kyodo News JBN
Thursday, November 02 2023 - 17:00
NEG's Lens Antenna Utilized in Self-driving Bus Convoy Demonstration Experiment, Revolutionizing Mobile Communication with Use of Specialized Glass
OTSU, Japan, Nov. 2, 2023 /Kyodo JBN-Asianet/ --

- Specialized Glass Contributes to Transportation Infrastructure Development -

A lens antenna made with specialized glass, developed by Nippon Electric Glass 
Co., Ltd. (hereinafter "NEG"), has been used in a self-driving bus convoy 
experiment conducted in Shiga Prefecture, Japan. In this experiment, the lens 
antenna played a pivotal role in improving stable information transmission 
between buses in convoy, successfully addressing the challenges associated with 
conventional antennas used in standard mobile communication. This technology 
enables high-speed and high-capacity information communication through 
millimeter-wave communication.

Product details

Addressing Social Challenges: Achieving Stable Communication with Lens Antennas 
Using Specialized Glass

Self-driving bus convoys, offering increased transportation capacity without 
the need for additional drivers, are being considered as a way to create 
region-specific transportation infrastructure and next-generation mobility 
services. The demonstration experiment aimed to achieve convoying and 
self-driving of multiple buses through information communication between the 
leading bus and its followers.

The use of lens antennas made with specialized glass has resolved issues such 
as communication interruptions during turns in self-driving bus convoying, 
offering more stable information transmission compared to conventional 
antennas. Furthermore, it has improved throughput and reduced latency compared 
to traditional antennas. The lens antenna using specialized glass was developed 
to meet requirements for self-driving bus convoying.

Requirements for Antennas
- Stable communication during turns
- Compact size for easy installation anywhere
- Resistance to deterioration caused by rain or snow

Advantages of NEG's Lens Antenna Using Specialized Glass
1. Customizable beam shaping for user needs 
In the demonstration experiment, a specialized glass material with suitable 
dielectric constant and low loss tangent is used for lens design. By reducing 
loss tangent, radio wave loss was minimized, and the lens shape could be 
adjusted to send radio waves in one direction or over a broader area.

2. Stable communication even during turn
The lens antenna allowed directing radio waves towards the necessary direction, 
preventing unnecessary radiation. It achieved communication in a 
millimeter-wave band with high gain (9dBi) over a wide area, without null 
points. This innovation prevented communication interruptions during turns and 
ensured stable communication during convoying.

3. Potential application with beamforming technology
- Expanding the field of view for external vehicle sensors to enhance collision 
avoidance systems
- Installing sensors inside vehicles to prevent child abandonment
- Placing sensors in homes to monitor the well-being of elderly individuals

The lens antenna utilized in the experiment was designed using materials 
developed by NEG specifically for this demonstration. These lens antennas are 
adaptable to various conditions and functions, promising versatile applications 
in various aspects of daily life. The company is committed to addressing 
societal issues that go beyond the realm of communication.

For full press release, please visit:

Source: Nippon Electric Glass Co., Ltd.