JPH032979Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to an antenna device that uses a microstrip antenna, and in particular, an antenna that can receive broadcasting radio waves from an artificial satellite and a This invention relates to an antenna device that can also be used as a solar water heater to heat water.

[Prior art]

Fig. 1 shows a conventional antenna device for receiving broadcasting radio waves from an artificial satellite. 4 is a direction adjustment section for directing the reflecting mirror 1 in a desired direction, and 5 is a pole that supports the direction adjustment section.

In the antenna device shown in FIG. 1, broadcasting radio waves emitted from an artificial satellite are collected by a reflector 1 into a primary radiator 2, and a desired electrical signal is extracted. Since the load is large, the installation location must be strong, and it is particularly difficult to install it on the roof of a wooden house.

[Summary of the idea]

This idea was made with the aim of improving these shortcomings.It is a solar water heater that can be installed on the roof of a wooden house without increasing the wind load, and that uses solar heat to convert water into hot water. This paper proposes an antenna device that can be used for both.

[Example of idea]

FIG. 2 is a schematic configuration diagram showing an embodiment of this invention. In the figure, 6 is a water tank, 7 is a cover of the water tank, and 4 is a direction adjustment section.

FIG. 3 shows a schematic configuration diagram of the aquarium cover 7 of this invention, FIG. 3 a shows a radiating element part, FIG. 3 b shows a power supply circuit part, and FIG. 3 c shows a cross-sectional view. The cover 7 includes a metal foil 9 and a circular metal foil 1 which are applied to the entire surface of the portion sandwiched between the dielectric 8 and the dielectric plate 8.
0, metal foil line 11, metal foil 10 and metal foil line 1
1 and an output terminal 13.

In this embodiment, the microstrip antenna is constructed using circular metal foil 10, but it can also be constructed using rectangular metal foil or metal foil of any shape.

By the way, in the suburbs of Tokyo, the elevation angle at which the broadcasting satellite is viewed is approximately 42 degrees, and the height of the center of Japan is approximately 79 degrees at the summer solstice, approximately 32 degrees at the winter solstice, and at the vernal and autumnal equinoxes, it is approximately
It is 56°. In order to effectively utilize solar heat all year round, the standard altitude is approximately 56° during the vernal and autumnal equinoxes, and in order to receive sunlight almost vertically from an elevation angle of 56°, cover 7 of the aquarium should be installed. It must be installed at an angle of approximately 34 degrees to the ground.

On the other hand, since the elevation angle at which the broadcasting satellite is viewed is 42°,
There is a difference of about 14 degrees from the standard Nichinan Junior High School.

Therefore, when prioritizing the installation angle of the solar water heater, it is necessary to direct the antenna beam downward by about 14 degrees. As shown in FIG. 3, the beam is tilted by applying a desired phase to each column of an array antenna consisting of a plurality of element antennas.

In the antenna actually manufactured, Fig. 3c
By changing the length of the feed line as shown in Figure 2, the feed phase is changed and the beam is directed in the desired direction.

While the direction of arrival of radio waves from broadcasting satellites is almost constant, the direction of arrival of sunlight changes depending on the time and season. The direction adjustment section 4 adjusts the direction so as to receive the maximum amount of radio waves from the broadcasting satellite.

In addition, in the embodiment of this invention, it has been shown that radio waves of the same phase are given to each row in the horizontal direction and the beam is directed in the elevation angle direction, but it is also possible to give radio waves of the same phase to each row in the vertical direction. As a result, the beam can also be directed in the east, west, north, south, and north directions, and the direction adjustment in the east, west, north, south, and north directions at the installation location of this antenna device can be made to the extent of fine adjustment.

Furthermore, in order to improve the weather resistance and solar heat absorption characteristics of the antenna device according to this invention, the circular or rectangular metal foil and metal foil line configured on the cover are covered with a dielectric sheet, and the By applying black, gray, green, or blue paint to the dielectric sheet,
It can improve absorption of solar heat.

[Effect of idea]

As explained above, this invention can easily provide an antenna with a small wind load by using a cover made of a microstrip antenna as a water tank cover for a conventional solar water heater. It has the effect of functioning as a solar water heater.

Therefore, it is very effective to install the antenna device of this invention on the roof of a relatively weak wooden house like the one in Japan, and it can also be used as a water heater using solar heat, so it is effective from an energy saving perspective. The practical effects are also very large.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a conventional antenna device for receiving radio waves from a broadcasting satellite, and FIG. 2 is a sectional view showing an antenna device according to an embodiment of the invention.
FIGS. 3a, 3b, and 3c are schematic diagrams showing the antenna section of an embodiment of this invention. In the figure, 1 is a reflector, 2 is a primary radiator, 3 is a support, 4 is a direction adjustment unit, 5 is a pole, 6 is a water tank, 7 is a cover, 8 is a dielectric plate, 9 is a metal foil, 1
0 is a circular metal foil, 11 is a metal foil line, 12 is a conductor, and 13 is an output terminal. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) On one side of the dielectric with metal foil in between,
A power supply circuit section consisting of a metal foil line and an output terminal for collecting and extracting received radio waves are provided, and the opposite side is equipped with a microstrip consisting of a plurality of circular or rectangular shapes made of metal foil. By providing a strip antenna, connecting the feeding circuit section and the microstrip antenna with a conductor, and changing the length of the line of the feeding circuit section connected to the microstrip antenna array, the microstrip antenna can be By using an antenna that changes the phase of the radio waves fed to the lip antenna array in a stepwise manner and directs the beam in the desired direction of elevation or elevation, or in the north, south, east, or west direction, it is used as a cover for the water tank of a solar water heater that uses solar heat. , an antenna device characterized by having both the functions of an antenna and a solar water heater. (2) In order to improve the weather resistance of the microstrip antenna consisting of a circular or rectangular shape and the feeding circuit section consisting of a metal foil line, the microstrip antenna and the feeding circuit section are covered with a dielectric sheet. , and the dielectric sheet on the microstrip antenna is coated with black, gray, green, or blue paint to facilitate absorption of solar heat. An antenna device according to claim (1) of the utility model registration claim.