On-Glass Antennas for Cars Foster 5G Even at High Speed
The cutting-edge technology from AGC can receive radio waves for 5G communications and can be placed unobtrusively without affecting overall vehicle design.

GC Inc. has developed vehicle glass mounted antennas (On-Glass Antennas), which can receive radio waves for fifth-generation (5G) mobile communications applications. This technology was among the company’s highlight at the recent CEATEC 2019 held in Japan, particularly when AGC equipped a vehicle with the On-Glass Antennas, which attracted visitors’ attention.

The company featured at its booth the same vehicle the company used for the field trial of 5G communications, featuring a fast-moving vehicle, conducted in conjunction with NTT DOCOMO, INC. and Ericsson Japan. 5G antennas compatible with 28GHz band and were designed and developed by AGC were installed on glass surfaces in the vehicle’s four locations. The antennas are not easily seen from the exterior and can be installed without affecting the vehicle design.

On-Glass Antennas for Cars Foster
This vehicle equipped with On-Glass Antennas was used for the 5G field trial.
Passes High Speed Communications

In the field trial of 5G communications conducted by AGC, NTT DOCOMO, and Ericsson, the antennas exhibited a maximum communication speed of 8Gbps when moving at high speeds of approximately 100km/h, and a maximum of 11Gbps at a moving speed of approximately 30km/h, confirming that high-speed in-vehicle communications in the 28GHz band can be achieved by employing AGC’s On-Glass Antennas. The vehicle used was Nissan Motor’s GT-R.

Radio waves in the 28GHz band have a large propagation loss and have difficulty propagating over long distances. The installation of On-Glass Antennas on a vehicle enables stable transmission and reception of 5G radio waves using the beam forming function, which concentrates radio waves in a specific direction, and the MIMO function, which improves communication speed by simultaneously transmitting different data from multiple antennas.

This allows stable, high-speed communications even for vehicles in operation. In the field trial, 5G high-speed communications using both the beam forming function and the MIMO function was performed with a vehicle equipped with On-Glass Antennas.

Advanced Properties

The on-glass module was produced by making a millimeter wave antenna formed on a fluororesin substrate into a module and installing it on glass. Millimeter waves have high performance advance property and are reflected at buildings and other constructions, and hence, the antennas were installed in four directions of the vehicle to enable efficient reception of radio waves.

At CEATEC, AGC exhibited the vehicle used for the field trial and showed to visitors the positions at which On-Glass Antennas were installed on the vehicle interior side of windows. AGC, NTT DOCOMO and Ericsson will continue making efforts toward the use of 5G in a wide range of environments, including in-vehicle communications modules, targeting the realization of 5G connected cars.