Nagoya Institute of Technology, mm-wave and THz-wave System Laboratory
WJWTP Appointment Online Meeting

Next-Gen Innovative Antennas for High-Frequency Future: Advanced 300-GHz Antenna Solutions

We have developed high-gain low-loss lens antennas, multi-beam planar antennas, and phased arrays using integrated planar antennas in the 300-GHz band. Compared to our exhibition two years ago, the development of low-loss substrates has advanced significantly, leading to greatly improved performance and increased options. We will be showcasing these fabricated actual devices.

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Address Gokiso-cho, Showa-ku, Nagoya, 466-8555
Phone Number 0527355416
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Site URL http://aplab.web.nitech.ac.jp/
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Seminar

5/29/2025 (THU) 15:40 ~ 16:00B2-7WJWTPSeminar Venue B

300GHz Sub-Terahertz Antennas: Low-Loss and High-Gain Lens Antennas, Enhancing Performance with Advanced Low-Loss Substrates for Phased Arrays, and Multi-Beam Planar Antennas

In the development of antennas in the 300GHz sub-terahertz band, low-loss antenna configurations are essential. We have developed low-loss, high-gain lens antennas, multi-beam antennas, and phased arrays using planar antennas that can be integrated into substrates with integrated circuits. Additionally, we have developed transmission-line transition circuits necessary for feeding these antennas. Compared to our exhibition two years ago, the development of low-loss substrates has significantly advanced, leading to greatly improved performance and increased options. We will introduce these design and development technologies.

Nagoya Institute of Technology
Kunio Sakakibara
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Products / Services

Multi-beam Lens Antennas

Two types of multi-beam lens antennas are in the development in the 300 GHz band: a spherical lens with excellent wide-angle scanning performance and a plano-convex lens with low profile and excellent integration possibility. The multi-beam lens antenna has high gain and wide bandwidth, so it can perform ultra-wideband communication even in the 300 GHz band, which has large spatial propagation loss. We are currently studying one-dimensional beam scanning, but we are also working on two-dimensional beam scanning.

Multi-beam Planar Antennas

We are in the development of planar 300GHz multi-beam antennas composed of circuits for beamforming and planar antennas. At the 300GHz frequency band, the size of multi-beam antennas can be made very small. Our laboratory is working on three types of beamforming circuits and two types of planar antennas, aiming to improve the overall performance of multi-beam antennas. Additionally, we are also working on designs using low-loss substrates to enhance efficiency.

Antenna-feed and Measurement Techniques using Transmission-line Transitions

Our laboratory possesses the design and measurement technology for waveguide-to-substrate transmission line converters in the 300GHz band. Since primary radiators such as lens antennas are waveguide-fed, converters that efficiently convert radio waves from substrate transmission lines to waveguides are necessary to achieve high-performance antennas. Additionally, using these converters allows for easy connection between dielectric substrates and waveguides, enabling the measurement of transmission line losses without the need for advanced measurement skills or probe stations.