JP2009171533A - Array antenna for solar light direct receiving power generation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar photovoltaic power generation system suppressed in conversion loss using compact and inexpensive facilities that do not need a large installation site. <P>SOLUTION: An array antenna for solar light direct receiving power generation for generating electric power from an electromagnetic ray or the light of solar light is directly aligned in a direction of the sun in order to receive solar light energy and utilize it as electric power, and positioned in an array in order to provide a high directional gain. The antenna corresponding to the half wavelength of a peak of the electromagnetic ray delivered from the sun to the earth is arranged to receive the electric power with maximum efficiency. The antenna gain is improved by sharpening the beam of the antenna, or in other words, by narrowing down directionality to secure the more efficient and intensive reception of the electromagnetic ray. The antenna is also mechanically or electronically controlled and locked so that the front side of the antenna beam constantly faces the direction of the sun. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an array antenna used for generating electric power from sunlight.

Conventional solar power generation includes a system in which a solar cell panel is deployed in outer space, and the obtained electric power is converted into microwaves, irradiated onto the earth, and received (for example, see Patent Document 1).
Patent Publication 2003-164077

  In the conventional solar power generation system described above, satellite launch, large-scale deployment of solar panel, loss to convert to microwaves, and equipment for receiving microwaves on the ground are required, resulting in high costs. . Although it is one method for a large-scale power generation system, it requires a large installation location and has not been put into practical use.

  The present invention is intended to solve the problems of such a conventional configuration, and aims to directly receive sunlight on the ground and use it as power.

  In order to achieve the above object, the present invention receives solar energy and uses it as electric power, so that the antenna is directly directed toward the sun and the antennas are arranged in an array to provide high directivity gain. The solar direct receiving power generation array antenna extracts electric power from sunlight electromagnetic waves or light.

The operation of the above problem solving means is as follows. The peak of the energy spectral curve at a solar surface temperature of 5777 K is at 0.5 micrometer, and about 97% of the total radiation is contained in the 0.3-3 micrometer region. The peak of the spectral radiation curve serving as energy at 300 K corresponding to the earth's surface temperature of sunlight is about 9.6 micrometers, and the radiation is included in the range of 3 to 30 micrometers (see, for example, Non-Patent Document 1). ).
“Journal of the Japan Solar Energy Society Vol.33 No.3 2007, p.2”

  It is known that the antenna resonates best at half-wave and easily transmits or receives energy.

  By preparing an antenna corresponding to the half wavelength of the peak of the electromagnetic wave irradiated from the sun to the earth, power can be received with maximum efficiency.

  The distance between the sun and the earth is far, and electromagnetic waves are attenuated. Therefore, the antenna beam is sharpened, that is, the antenna gain is increased by narrowing the directivity, and electromagnetic waves are received more efficiently and strongly.

  The antenna is mechanically or electronically operated for tracking so that the front of the antenna beam is always directed toward the sun.

  As described above, the solar direct reception power generation array antenna of the present invention can secure power at individual installation locations without relying on a large-scale power plant or the like when securing power on the earth.

  In addition, since the wavelength is short, the array antenna can have a high gain and can be miniaturized, so that it can be provided with no restrictions on the installation location.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In FIG. 1, a half-wave dipole antenna 1 is connected to a feeding point 2 that collects electromagnetic waves received from the sun.

  In FIG. 2, the patch antenna 3 is connected to a feeding point 2 that collects electromagnetic waves received from the sun.

  In FIG. 3, a horn antenna 4 is connected to a feeding point 2 that collects electromagnetic waves received from the sun.

  In FIG. 4, a waveguide slot array antenna 5 is connected to a feeding point 2 that collects electromagnetic waves received from the sun.

  Any other antenna can be applied as long as the gain can be improved by using an array.

  The electromagnetic energy from the sun collected at the feeding point is converted into a high-frequency current by the antenna. Since the amplitude and phase are not coherent, a rectifier can be used to extract a constant level of direct current.

  FIG. 5 shows an embodiment. The array antenna is pointed toward the sun for maximum received power. The high-frequency current received by the antenna is converted into direct current by a rectifier and connected to a device that requires a power source to supply power. In addition, if the obtained direct current is stored in a storage battery or the like, it is possible to supply power to the device continuously even at night or in a sunny day.

  Rather than relying solely on oil, uranium, gas, methane hydride, wind power generation, geothermal power generation, conventional solar power generation and solar heat utilization, new energy resources can be acquired. Furthermore, since energy can be obtained in places where sunlight falls, it can be used in mountainous areas or isolated islands where transmission lines are difficult to lay. In addition, since there is a device that generates power near the equipment used, it is an efficient system that can ignore the loss of power transmitted from the power plant to each home / factory as in the past.

Example of array configuration of half-wave dipole antenna showing embodiment of the present invention An example of an array configuration of a patch antenna showing an embodiment of the present invention An example of an array configuration of a horn antenna showing an embodiment of the present invention An example of an array configuration of a waveguide slot array antenna showing an embodiment of the present invention Example of external view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Half wavelength dipole antenna 2 Feeding point 3 Patch antenna 4 Horn antenna 5 Waveguide slot array antenna 6 Rectifier 7 Feed line 8 Patch 9 Slot 10 Feeding waveguide 11 Radiation waveguide 12 Sun 13 Surface 14 Array antenna 15 Connection line 16 Equipment that requires power

Claims (1)

  In order to receive sunlight energy and use it as electric power, the antenna is directed directly toward the sun, and the antennas are arranged in an array to give high directivity gain, and the sun extracts electric power from sunlight electromagnetic waves or light. Array antenna for direct optical power generation.

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