Underwater radio wave communication method

Abstract

To provide a radio wave communication method that can be used even underwater to improve the underwater communication environment because conventionally, it was thought that radio waves could not be transmitted underwater and sound waves (sonar) were used for underwater wireless communication.SOLUTION: It is a misconception that radio waves cannot be transmitted underwater. Low-frequency radio waves (radio waves of long wavelengths) are difficult to transmit, but high-frequency radio waves (radio waves of short wavelengths) can transmit. Furthermore, by making the shape of a radio wave transmitting and receiving surface (diaphragm) of a communication device a curved shape rather than a flat shape, a focusing effect is applied to the radio waves during transmission and reception, improving the transmission and reception performance of the device. The problem is solved by using the radio waves in a high-frequency band and the communication device with the curved radio wave transmitting and receiving surface.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an applied technology of radio communication technology.

Background Art

[0002] Radio communication technology

[0003] The shape of the transmitting and receiving surface (diaphragm) of wave energy and the action of the physical action of wave energy

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventionally, since radio waves used in wireless communication were considered not to propagate in water, communication using radio waves was utilized on the ground or in outer space and not used in water. When a submarine communicates while submerged, there is a problem that acoustic (sonar) communication is used and the communication performance is low.

Means for Solving the Problems

[0005] The reason why radio waves were considered not to propagate in water was that when current digital communication technology had not advanced, low-frequency radio waves (long-wavelength radio waves) were used and communication was attempted in water using commonly used transmitting and receiving devices, but communication could not be achieved in the same way as on the ground (in the atmosphere). Therefore, the conclusion was reached that radio waves do not propagate in water (communication using radio waves cannot be performed in water), and this idea has continued until now. However, this understanding is incorrect, and radio waves can also propagate in water. (Radio communication is also possible in water.) The method is to use a transmitting and receiving device in which the shape of the surface (diaphragm) for transmitting and receiving radio waves is processed into a curved surface shape (convex surface shape) that is curved outward using high-frequency radio waves (short-wavelength radio waves). High-frequency radio waves (short-wavelength radio waves) have very high directivity (linear propagation) and can travel straight even in an environment with a high material density. When the shape of the surface (diaphragm) for transmitting and receiving radio waves is a planar shape, it propagates while spreading over a wide range. However, when it is a curved surface shape, it propagates while being focused within a specific range. By utilizing the propagation characteristics of radio waves based on the frequency of the radio waves and the shape of the radio wave transmitting and receiving surface (diaphragm), the problem is solved. (The transmitting and receiving device with a curved surface shape for the radio wave transmitting and receiving surface (diaphragm) has the function of an underwater wireless base station in the shape of a sphere. An anchor is driven into the bottom of the water, and a buoy is floated on the water surface and connected by a wire rope. The communication environment for the entire deep water area is improved by installing a large number of spherical transmitting and receiving devices in the middle part of the wire rope extending from the bottom of the water to the water surface.) (The radio waves used in communication propagate in outer space (vacuum) and on the ground (in the air). However, if there is a solid in the path, the propagation is hindered and it cannot pass through the solid. Thus, it has the characteristic that it can propagate in an environment with a low substance density such as in a vacuum or in the air, but cannot propagate in an environment with a high substance density such as in a solid. Due to this characteristic, in water where the substance density is higher than in a vacuum or in the air and lower than in a solid, low-frequency radio waves (radio waves with a long wavelength) have difficulty passing between substances, so their propagation is hindered. However, high-frequency radio waves (radio waves with a short wavelength) can easily pass between substances, so they can propagate. Therefore, in water, there are radio waves that can be used for communication and radio waves that cannot be used depending on the frequency band.)

Claims

【Claim 1】 Conventionally, since radio waves used in wireless communication do not propagate in water, it has been considered that radio wave communication in water is impossible. However, this understanding is incorrect, and radio wave communication is possible even in water. In water, low-frequency radio waves (radio waves with long wavelengths) are difficult to propagate, but high-frequency radio waves (radio waves with short wavelengths), which are currently called 5G, 6G, etc., have very high directivity characteristics and can propagate even in water. As communication equipment in water, the radio wave transmitting and receiving surface (diaphragm) is made into a spherical shape instead of a general planar shape. A large number of communication devices with this spherical transmitting and receiving surface (diaphragm) are installed to form an underwater communication base station. When the radio wave transmitting and receiving surface (diaphragm) is spherical (curved surface), a focusing effect acts on the radio waves during transmission and reception. When a focusing effect acts on the radio waves, during transmission, the radio waves do not spread widely but travel straight in a specific direction. During reception, the reception performance is improved. A method that enables radio wave communication in water by using this high-frequency radio wave (radio wave with short wavelength) and a communication device with a spherical transmitting and receiving surface (diaphragm). (By driving an anchor into the bottom of the water, connecting a wire rope, floating a buoy on the water surface, and connecting a large number of spherical communication devices in the middle area between the bottom and the water surface to accommodate the water depth.)