- World's first 28 GHz band compatible antenna achieves 8 Gbps super high-speed communications with high-speed vehicle -

AGC Inc. (AGC) and NTT DOCOMO, INC. (DOCOMO) today achieved the world’s first1 8 Gbps 5G communications with a fast-moving vehicle equipped with “vehicle glass mounted antennas” (On-Glass Antennas) in a field trial conducted in conjunction with Ericsson Japan.

The 5G 28 GHz band compatible On-Glass Antennas used in the field trial were designed and developed by AGC. The antennas are not easily seen from the exterior and can be installed on glass surfaces without affecting the vehicle design.

Radio waves in the 28 GHz band have a large propagation loss and have difficulty propagating over long distances. By installing an On-Glass Antenna on the vehicle, radio waves above 6 GHz can be transmitted and received 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.

For this 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. The trial was held at the National Institute for Land and Infrastructure Management in Ibaraki Prefecture, Japan. While moving at high speeds of approximately 100 km/h, a maximum communication speed of 8 Gbps was achieved, and a maximum of 11 Gbps was achieved at a speed of approximately 30 km/h, confirming that high-speed in-vehicle communications in the 28 GHz band can be achieved by utilizing On-Glass Antennas.

DOCOMO, AGC, and Ericsson Japan will continue working toward utilizing 5G in various environments including in-vehicle communication modules, etc., aiming to see 5G connected cars become a reality.

*1 According to research carried out by DOCOMO (as of July 25, 2018).

REFERENCE

Details of 5G Field Trial Using “Vehicle Glass Mounted Antenna”

1. Field trial outline and results

The trial was carried out at a straight section of test course approximately 2.2 km long at the National Institute for Land and Infrastructure Management. 5G data communications were carried out using the 28 GHz band between the moving test vehicle equipped with a 5G mobile station to which several On-Glass Antennas were connected and three 5G base stations set up along the sides of the course.

For this trial, a total of eight On-Glass Antenna elements were installed in the test vehicle on the windshield, both side windows, and rear window, so that radio waves could be received from various directions.

By utilizing the On-Glass Antennas to receive signals in combination with the MIMO function and the beam forming function with up to four beams supporting vertical and horizontal polarization, 5G high-speed communications were realized, with up to 8 Gbps at a moving speed of approximately 100 km/h, and 11 Gbps at a moving speed of approximately 30 km/h.

Fig. 1 Scene of field trial Fig. 1 Scene of field trial
Fig. 2 On-Glass Antenna element Fig. 2 On-Glass Antenna element
Fig. 3 Installation examples of On-Glass Antennas Fig. 3 Installation examples of On-Glass Antennas
Fig. 4 Exterior of vehicle with On-Glass Antennas installed Fig. 4 Exterior of vehicle with On-Glass Antennas installed

2. Test period

June 28, 2018 – July 25, 2018

3. Frequency band used

28 GHz band (bandwidth: 732 MHz)

4. System configuration for field trial

Fig. 5 System configuration Fig. 5 System configuration

5. Roles of each company

6. Video of experiment

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