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

1. Conventionally, it was thought that radio waves used in wireless communication could not be transmitted underwater, and therefore radio wave communication was not possible underwater. However, this perception is incorrect; radio communication is possible underwater. Low-frequency radio waves (long wavelengths) are difficult to transmit underwater, but high-frequency radio waves (short wavelengths) are highly directional (straight-line) and can be transmitted underwater. As an underwater communication device, the radio wave transmitting and receiving surface (diaphragm) is not a typical flat shape, but rather a curved shape (convex spherical shape) that curves outward. A communication base station is made by installing a large number of communication devices with transmitting and receiving surfaces (diaphragms) of this shape. If the surface (diaphragm) for transmitting and receiving radio waves has a curved shape (convex spherical shape), a focusing effect acts on the radio waves during transmission and reception. When the radio waves are focused, they do not spread over a wide area during transmission, but travel in a straight line in a specific direction, and reception performance improves during reception. This method makes underwater radio wave communication possible by using "high frequency radio waves (short wavelength radio waves)" and "a communication device with a spherical transmitting and receiving surface (diaphragm)." Piles are driven into the bottom of the water, buoys are floated on the surface, and the buoys are connected to the stakes with wire ropes or the like, and a number of spherical, waterproof radio wave transmitting and receiving devices (radio wave communication devices) are installed on the wire ropes or the like. By installing multiple communication devices on wire ropes that connect the bottom of the water to the surface, radio wave transmission and reception is possible throughout the entire depth of the water. Also, by making the communication devices spherical, radio wave transmission and reception is possible from all directions, 360°. By installing such communication devices at regular intervals, they can function as relay base stations for underwater wireless communication, improving the underwater radio communication environment. Radio waves used for communication and other purposes can travel in outer space (a vacuum) and on Earth (the atmosphere), but if there is a solid object in their path, their travel is obstructed and they cannot pass through the solid. Thus, radio waves have the characteristic that they can travel through environments with low material density, such as a vacuum or the atmosphere, but cannot travel through environments with high material density, such as inside a solid. Due to the characteristics of radio waves, in water (liquid), where the density of matter is higher than in a vacuum or air, but lower than in a solid, low-frequency radio waves (long wavelengths) have difficulty passing between materials and are therefore hindered from traveling, whereas high-frequency radio waves (short wavelengths) can easily pass between materials and can travel. As such, underwater, some radio waves can be used and some cannot, depending on the frequency band (difference in wavelength).

2. As in the method described in claim 1, high-frequency radio waves (radio waves with short wavelengths) can travel underwater and can be used for communications, but there are other methods for making radio waves travel underwater. This method uses radio waves with a different wave motion than the transverse waves that were the wave motion of conventional radio waves. Until now, it has been thought that radio waves only consist of transverse waves, but by changing the shape and movement of the radio wave source (diaphragm), it is possible to generate and use (transmit and receive) radio waves with other wave types. A transverse wave is a wave that travels while vibrating in a direction perpendicular to the direction of travel of the wave. Transverse waves are generated by vibrating a radio wave source (a diaphragm) left and right or up and down relative to the direction of wave propagation during transmission. In contrast to this, this method enables underwater travel (communication use) by rotating (rotational motion) the radio wave source (vibration plate) rather than vibrating (reciprocating motion), and using the waves generated, rotating waves. Rotating radio waves, which are generated by rotating the radio wave source (diaphragm) during transmission, have never been used before. Rotating radio waves can be broadly divided into the following three types. (Rotation wave 1) Screw wave The shape of the radio wave generating source (charged vibration plate) is not flat, but is made to be a conical or cylindrical core rod that is wound diagonally around the twisted grooves of a drill, and radio waves are transmitted by rotating the core rod at high speed. This results in a wave that moves forward with a twisting motion (rotational motion) in the direction of the wave's travel, like a drill or screwdriver. The receiver of such radio waves must also reproduce the same waves, so the device must have the same shape or structure as the transmitting device. (Rotation wave 2) Wheel wave The shape of the radio wave source (charged diaphragm) is not flat, but is shaped like a circular plate shaped like a wheel (tire of a passenger car, etc.) wrapped around the outer periphery, and radio waves are transmitted by rotating the circular plate vertically at high speed in the direction of wave travel. This creates a wave that moves forward in the direction of the wave, with a wheel-like motion (rotational motion) in the direction of the wave's movement. The receiver of such radio waves must also reproduce the same waves, so the device must have the same shape or structure as the transmitting device. (Rotation wave 3) Disc wave The shape of the radio wave generating source (charged diaphragm) is not flat, but is the same as that described in (Rotating Wave 2), and the circular plate is turned sideways and rotated at high speed in the direction of wave propagation to transmit radio waves. This creates a wave that moves forward in the direction of the wave's movement, with a rotational motion similar to that of a discus thrower in track and field. The receiver of such radio waves must also reproduce the same waves, so the device must have the same shape or structure as the transmitting device.

3. A communication standard using the method according to claims 1 and 2. (Radio waves for communication)

4. A remote sensing standard for observation and surveying using the method according to claims 1 and 2.

5. A standard for radio waves used in defense equipment applications using the method of claims 1 and 2. (Radar for guidance of missiles, detection of submarines, reconnaissance from satellites, etc.)

6. Apparatus, facilities, defense equipment, aircraft, ships and other transportation means, artificial satellites, planetary probes, remotely controlled construction machinery, and agricultural machinery that use the standards set forth in claims 3, 4, and 5.

7. A service or business using the device, facility, defense equipment, aircraft, ship or other transportation means, artificial satellite, planetary probe, remotely controlled construction machine, or agricultural machine according to claim 6.