A type of electromagnetic wave primarily used in wireless communication, which falls under specific frequency and wavelength criteria outlined by regulations.
The general term for electromagnetic waves that have a wavelength greater than 0.1 millimeters, commonly utilized for transmitting information wirelessly.
A category of waves characterized by their ability to carry signals over distances without the need for physical connections, often classified by their wavelength into longwave, medium wave, and shortwave types.
Example:
彼の携帯電話は他の電話を妨害する電波を出した。
A device used to detect and locate objects at a distance by sending out radio waves and analyzing the signals reflected back.
A technological instrument that enables the identification and tracking of airborne or maritime vessels through the measurement of electronic signals.
An electronic apparatus designed to measure the presence and movement of objects by utilizing emitted radio signals, commonly employed in navigation and surveillance.
A legal framework established in 1950 that aims to ensure the fair and efficient use of radio waves, regulating various aspects of radio stations and all wireless communication entities, including licensing, equipment, personnel, and operational oversight.
Legislation that governs the allocation and management of electromagnetic spectrum resources to facilitate orderly communication and broadcasting, detailing the responsibilities and compliance requirements for wireless service providers.
A regulatory law that encompasses the guidelines for the operation and administration of radio services, including the issuance of permits and monitoring practices related to radio wave utilization in Japan.
A specialized instrument designed to detect and analyze weak electromagnetic signals emitted by celestial objects, such as stars and galaxies, utilizing antennas that are shaped and configured to capture specific wavelengths of radio waves.
An observational device that amplifies and studies radio frequencies from astronomical sources, employing various antenna shapes, including parabolic antennas, to explore the universe beyond the visible spectrum.
Celestial electromagnetic waves that propagate through space, often originating from astronomical objects and events.
Radio waves that travel across the universe, carrying information about the structure and behavior of celestial bodies.
Invisible waves emitted from cosmic phenomena, analyzed to understand the composition and dynamics of the universe.