JPH04134908A - Reflection type lens antenna - Google Patents

Abstract

PURPOSE:To realize the thinning of a reflecting type lens antenna, to reduce the weight and the material cost and to decrease the installation space by mounting a conductive reflection member to the surface of the flat face of a plano-convex lens so as to form the reflecting type lens and providing a reception pickup antenna to its focus. CONSTITUTION:The antenna is provided with a dielectric substance made plano-convex lens 2 whose one surface is formed flat and whose other side surface is formed convex and with a reception pickup antenna section 4, and a conductive reflecting member 3 is mounted to the surface of the flat side of the plan-convex lens 2 to form the reflecting type lens 1 and the reception pickup antenna section 4 is provided on the focus position of the reflecting type lens. In this case, an electromagnetic wave sent from a satellite is concentrated in the same phase on a focus of the reflecting type lens 1 by the dielectric substance made plan-convex lens 2 while being reflected by the conductive reflecting member 3 mounted onto the surface of the flat side of the reflecting type lens 1 or the surface of the projection face side to strengthen the electric field strength. Thus, the practical and economical reflecting type lens is realized in which installation is facilitated with thin and simple structure and flat mounting is available.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a satellite transmission/reception antenna for satellite broadcasting, satellite communication, etc.

[Conventional technology]

Conventionally, parabolic antennas, microstrip array antennas, and the like are known as receiving antennas for receiving satellite broadcasting.

Among these, the parabolic antenna is composed of a reflecting mirror 21 formed by a paraboloid of rotation and a primary radiator 22, as shown in FIG. It is set up like this. In the parabolic antenna configured in this way, radio waves transmitted from the satellite are reflected by the reflector 21 and input to the primary radiator 22. Note that the reference numeral 23 in FIG. 17 indicates a BS converter.

On the other hand, a microstrip array antenna is a planar antenna with a layered structure, as shown in FIG.
The conductors of the radiating elements are assembled into an array, and a branch circuit and a matching circuit are formed on a microstrip substrate. In FIG. 18, reference numeral 24 represents a strip array, 25 represents a dielectric, and 26 represents a ground plate.

[Problem to be solved by the invention]

By the way, in the conventional satellite broadcast receiving antenna as described above, the material cost is high due to the large number of component parts, and in addition, the manufacturing cost is high because it takes time and effort to assemble the components depending on the number of component parts. There was a problem. In addition, there are several ways to install the antenna, such as roof-mounting, balcony-mounting, and ground-mounting, but all of them require foundation work, and the problem is that installation takes time and effort. was there. In particular, parabolic antennas are susceptible to the effects of wind due to their structure and are subject to large wind pressure loads.
Wind pressure may cause the antenna's elevation and azimuth to shift, causing the received level to drop significantly.Furthermore, snow buildup on the opening of the secondary radiator and reflector may cause the received level to drop. The problem was that it was easily affected by weather conditions. On the other hand, microstrip array antennas have a thin planar structure that is resistant to wind pressure and snow damage, but power is supplied to each radiating element through a long line of strips and a ground plate sandwiching a dielectric material that is very thin compared to the wavelength. Therefore, there was a problem that conductor loss was large. Furthermore, in any case, since they have a three-dimensional structure when in use, they require a large installation space, and there is a problem in that they cannot be installed on a flat surface such as a wall of a building.

The present invention aims to solve these problems.
By configuring the antenna from a reflective lens and a receiving pickup antenna part, we provide a practical and economical reflective lens antenna that has a thin and simple structure, is easy to install, and can be mounted on a flat surface. The purpose is to

[Means to solve the problem]

Therefore, the reflection type lens antenna of the present invention includes a plano-convex lens made of a dielectric material with one surface formed in a planar shape and the other surface formed in a convex shape, and a reception pick amplifier antenna section, A conductive reflective member is attached to the flat side surface of the convex lens to form a reflective lens, and
The receiving pickup antenna section is disposed at the focal point of the reflective lens.
The reflective lens antenna of the present invention includes a plano-convex lens made of a dielectric material, one surface of which is formed in a planar shape and the other surface formed in a convex shape, and a receiving pickup antenna section, and the convex surface side of the plano-convex lens is provided with a receiving pickup antenna section. The device is characterized in that a reflective lens is formed by attaching a conductive reflective member to the surface, and the receiving pickup antenna section is disposed at the focal point of the reflective lens.

Further, the reflective lens antenna of the present invention is characterized in that the conductive reflective member is attached to one surface of the dielectric plano-convex lens by metal adhesion or vapor deposition.

Furthermore, the reflective lens antenna of the present invention is characterized in that a dielectric reinforcing member is attached to the reflective lens.

Furthermore, the reflective lens antenna of the present invention is characterized in that a dielectric radome is attached to the reflective lens.

Furthermore, in the reflective lens antenna of the present invention, a metal fitting and a support arm are attached to the back surface of the reflective lens, and the upper end of the pole is pivotally attached to the metal fitting, and the support arm is attached to the metal fitting. It is characterized in that the receiving pickup antenna section is provided at the focal point of the reflective lens so that it can be held therein.

[For production]

In the above-mentioned reflective lens antenna of the present invention, electromagnetic waves transmitted from a satellite are reflected by a dielectric plano-convex lens while being reflected by a conductive reflective member attached to the flat or convex surface of the reflective lens. The beams are concentrated in the same phase at the focal point of the reflective lens, thereby increasing the electric field strength.

〔Example〕

Hereinafter, a reflective lens antenna as an embodiment of the present invention will be explained with reference to the drawings.

1 to 8 show a reflection type lens antenna according to a first embodiment of the present invention, and FIG. 1 is a schematic diagram of its configuration, FIG.
Figures 3x and 3b are coordinate explanatory diagrams for deriving the formula for the lens shape of a reflective lens, Figures 4g and 4b are explanatory diagrams for explaining conditions, and Figure 5! The figure is a central vertical cross-sectional view showing an example of a dielectric lens constituting a reflective lens, and Figure 5b is a vertical cross-sectional view of a dielectric lens that constitutes a reflective lens.
FIG. 6 is an explanatory diagram of the configuration of a reflective lens, FIG. 7 is a schematic diagram of the configuration of an offset reflective lens antenna, and FIG. 8 is a dielectric lens shown in FIG. 5a. FIG. 7 is a central vertical cross-sectional view of the body-made lens when no zoning is formed.

As shown in FIGS. 1 and 6, the reflective lens 1 of this embodiment is composed of a plano-convex lens 2 made of a dielectric material and a conductive reflective member 3 attached to the plane side surface of the plano-convex lens 2. ing. The shape of the dielectric plano-convex lens 2 is
Electricity is generated in all optical paths of electromagnetic waves transmitted from a transmitting point, reflected by the conductive reflective member 3 attached to the plane side surface of the plano-convex lens 2, and received at a receiving point assumed to be the focal point F of the plano-convex lens 2. The target distances are designed to be equal.

The shape of the plano-convex lens 2 is designed according to the conditions of use, and Figs. FIG. 4A) is a central vertical cross-sectional view and a central cross-sectional view of an example of a design example of the plano-convex lens 2 (see FIG. 4a).

These specific examples are as follows:
If we express the equation for the lens thickness in the vertical direction of the plano-convex lens 2 assuming that the plano-convex lens 2'
(Zoning is not formed) is on the XY plane, and the satellite 7 is on the Z axis. And the third a
In the figure (the plano-convex lens 2' has no zoning formed), the optical path A is determined by the principle of the reflective lens 1.
(F'P'P groan PP'F) and optical path B (FO'0-00'
Since the electrical distances of F) are equal, F'P'2P'PP'F2FO'
20'0λ0+ λ6+ λ. = λ. “λ6+
1・・・・・・・・・・・・・・・・・・・・・ (1
) where FO'-0'F-d 0'0=OO'-x.

P'P=PP'-x P''F-1, and F, d + X o, X +', θ
F : Focal point of the lens d : Focal length xo : Maximum thickness at the center of the lens X : Lens thickness l : Distance from focal point F to point P' on the lens surface θ : From focal point F to point P' on the lens surface Assuming that the angle formed by m is m=0.1, 2.3...e, the vertical lens thickness X of the plano-convex lens 2 can be expressed by the following formula.

λ. : Wavelength λ in free space, : Wavelength n in the lens: Refractive index (n-2°/λ4) Next, when considering the equation for the lens thickness in the lateral direction of the plano-convex lens 2, it is shown in Fig. 3b (plano-convex lens 2' ), the lens thickness y in the horizontal direction of the plano-convex lens 2 is -αi~view side→jiruvf421.1 old・dan・(3) r
: Distance m from focal point F to point R' on the lens surface: Using the method described above, the plano-convex lens 2 can be calculated from equations (2) and (3) Although the shape of the convex portion is determined, zoning is formed in the plano-convex lens 2 by changing the value of m in equations (2) and (3).

This is based on the principle that the same effect can be obtained even if the phase is partially shifted by an integral multiple of 2 on the front surface of the reflective lens 1, and by adding stages (zoning) to the lens surface, the entire lens is It has a reduced volume.

Fifth! The figure shows the incident angle of the electromagnetic waves transmitted from the satellite 7 on the reflective lens 1 at 900 degrees (see the fourth Hatake diagram) under the above-mentioned conditions, that is, 12 GBy, and the focal length is 1. +1m
, which shows a central vertical cross-sectional view and a central cross-sectional view of a design example of the plano-convex lens 2, each on a scale of 1/1O, assuming that the lens material is polyethylene; in this case, the plano-convex lens 2 has a perfect circular shape. Therefore, the central cross-sectional view is equal to the central vertical cross-sectional view, and in fact, the maximum diameters of the plano-convex lens 2 in both the vertical and horizontal directions are approximately 1 m, and the maximum thickness at the central portion of the lens is approximately 2.5 cm.

Incidentally, FIG. 8 shows a design example of the plano-convex lens 2'' in which no zoning is formed, assuming the same design conditions as in FIG. 51.

In such a plano-convex lens 2', the lens maximum diameter is the 5th a
The thickness is about 1 m, which is the same as the plano-convex lens 2 in the figure, but the maximum thickness at the center of the lens is about H, 5 cm, which is five times the thickness of the plano-convex lens 2 in Fig. 5a.

The plano-convex lens 2 can be designed according to conditions, and the lens shape changes depending on the conditions and lens material.
By changing the value of, the size also changes, so
It becomes possible to arbitrarily change the size even under the same conditions. At this time, the maximum lens thickness becomes smaller in proportion to the maximum lens diameter.

Such a plano-convex lens 2 is made of an opaque dielectric material such as polyethylene, and can be formed into a lens shape by cutting or molding.

In cases where the plano-convex lens 2 is formed using a transparent dielectric material, sunlight may be focused by the lens and may be dangerous, so a coating that blocks sunlight may be mixed or applied to the dielectric material. Therefore, it is necessary to construct a plano-convex lens 2 that does not transmit sunlight.

Further, as shown in FIG. 6, a conductive reflective member 3M made of metal, for example, is attached to the plane side surface of the plano-convex lens 2 to reflect the transmitted electromagnetic waves, so that the plano-convex lens 2 and the conductive reflective member 31 are connected to each other. It constitutes a reflective lens l having an integral structure. An example of a method for attaching the plano-convex lens 2 and the conductive reflective member 3a is to apply an adhesive to the surface of the plano-convex lens 2 or to one side of a metal serving as the conductive reflective member 3, and to attach the conductive reflective member 3a with the adhesive. There are several methods, such as a method of adhering by vapor deposition, and the like. As the conductive reflective member 31,
It is also possible to use carbon fiber or other conductive materials instead of metal.

Furthermore, as shown in FIG. 1, a receiving pickup antenna section 4 for receiving the transmitted electromagnetic waves concentrated by the reflective lens 1 is provided at the focal point of the reflective lens 1. This reception pickup antenna section 4 is
It is composed of a radiator 58 and a converter 6, and the radiator 5 and the converter 6 are generally integrated. 1st
In the figure, the radiator 5 is shown as a horn structure, but it may also be constructed as an array of spirals, dipoles, strip lines, slots, etc.

Further, as an application example of the reflective lens antenna of the present invention, it is also possible to arrange a second reflective mirror used in a Cassegrain antenna or a D'Agorian antenna with respect to the reflective deaf lens 1.

The reflective lens 1 of this embodiment can be designed according to the case, so as shown in FIG. It is also possible to form it assuming that the incident angle with respect to 1 is 38 degrees (see FIG. 4b), and in this case, it is also possible to use a mold for wall mounting on the outer wall of a building, a window, etc. The reflective lens 1 designed as an offset type has an elliptical shape, but even in this case, the maximum thickness of the lens becomes smaller in proportion to the maximum diameter of the lens, as in the case of the above-mentioned perfect circular lens.

In the reflective lens 1 configured in this way, the electromagnetic waves transmitted from the satellite 7 are reflected by the conductive reflective member 31 formed on the flat surface of the reflective lens 1, while the dielectric plano-convex lens 2 Then, all the transmitted electromagnetic waves are converged in the same phase on the receiving pickup antenna section 4 disposed at the focal point of the reflective lens 1, and the electric field strength is increased for reception. That is, since the transmitted electromagnetic wave is reflected by the conductive reflective member 3a that is disposed integrally with the plano-convex lens 2 on the back side of the reflective lens 1, the electromagnetic wave passes through the plano-convex lens 2 twice, and the effect of the lens increases. makes the electrical path of all the transmitted electromagnetic waves equal and converges them to the focal point of the lens.

This embodiment has the following advantages.

The electromagnetic waves transmitted from the satellite are reflected by the conductive reflective member attached to the flat surface of the dielectric plano-convex lens, and then synthesized by matching the electrical paths with the plano-convex lens, so the transmitted electromagnetic waves pass through the lens twice. In addition, since zoning is formed, the lens thickness is reduced to approximately 1/1G compared to the lens thickness required for a transmission type lens in which the transmitted electromagnetic wave passes through the lens once. This makes it possible to provide a thin reflective lens antenna. The thinness of this reflective lens antenna reduces weight, reduces material costs, allows for thinner packaging, and reduces installation space, making it a practical and economical satellite reception device. Enables antenna supply.

In addition, a reflective lens antenna is composed of a reflective lens, which is constructed by integrating a dielectric plano-convex lens and a conductive reflective member, and a receiving pickup antenna section, which is composed of a radiator and a converter. Since the structure is simple, the number of components is smaller than that of conventional satellite receiving antennas, and the manufacturing cost is reduced because it is easy to manufacture.

Furthermore, depending on the design conditions, if an offset type reflective lens is configured, the reflective lens antenna can be installed on a flat surface such as a building wall, compared to conventional satellite receiving antennas. This makes it easy to install the antenna, and the installation space is also reduced. Furthermore, since it has a planar structure, it is less susceptible to wind pressure and is less likely to attract snow or the like, thus improving its resistance to weather conditions.

Next, a second embodiment of the present invention will be described with reference to FIGS. 9a to 11.

Figures 9a and 9b are schematic configuration diagrams showing the reflective lens antenna of this embodiment, Figure 10 is a coordinate explanatory diagram for deriving the formula for the lens shape of the reflective lens, and Figure 11 is the reflective lens antenna. 8 is a central vertical cross-sectional view showing an example of a plano-convex lens 9 made of a dielectric material.

The difference between this embodiment and the first embodiment described above is that, as shown in FIGS. 9s and 9b, a conductive reflective member IO is arranged to form a reflective lens 8.

Ninth! The figure shows an example in which the entire surface of the convex side of the plano-convex lens 9 on which zoning is formed is covered with the conductive reflective member 10, and FIG. 9b shows the surface of the convex side of the plano-convex lens 9 on which zoning is formed. An example is shown in which only the convex portion of is covered with the conductive reflective member 1O, but the same effect can be obtained in both cases.

The lens shape of the plano-convex lens 9 is a conductive reflective member I that is transmitted from a transmission point and attached to the convex surface of the plano-convex lens 9.
The plano-convex lens 2 of the first embodiment is designed so that the electrical distances are equal in all optical paths of the electromagnetic waves reflected by the plano-convex lens 9 and received to the reception point assumed to be the focal point F of the plano-convex lens 9.
Similarly, the shape is designed depending on the conditions of use.

An example of the design is when the design conditions are the same as those for the lens 2 in the first embodiment, that is, assuming that the angle of incidence of the electromagnetic waves transmitted from the satellite 7 at 12GllX on the reflective lens 8 is 900 (see Figure 4a). plano-convex lens 9
It is expressed by the formula for the lens thickness in the vertical direction.

In Figure 1O, based on the principle of the reflective lens 8, the optical path A is
(F'P'P-P''PF) and optical path B (FO''O→00'
F) When the lens shape of the plano-convex lens 9 is determined using the same method as the formula for the lens shape of the plano-convex lens 2 in the first embodiment, the plano-convex lens 9 made of dielectric material is obtained. The vertical lens thickness X can be expressed by the following formula.

(The lens thickness in the lateral direction of the plano-convex lens 9 can be found in the same way.) x-d-11nx +mλ cosθ-d2nCO5
θ ・・・・・・・・・・・・(4) FIG. 10 shows an example of the reflective lens 8 of this embodiment under the above-mentioned conditions, that is, a reflective type of electromagnetic wave transmitted from the satellite 7 at 12 GHz. The angle of incidence with respect to lens 8 is set to 900 (fourth
1), the central vertical cross-sectional view of a design example of the plano-convex lens 9 is shown on a scale of 1/10, assuming that the focal length is 1.0 m and the lens material is polyethylene. Such a plano-convex lens 9
In this case, the lens maximum diameter is about 1 m, which is the same as that of the reflective lens l in the first embodiment shown in FIG. 5a, but the maximum thickness at the center of the lens is 0-Hcm, which is about 1/3 of the thickness.

Also, in this embodiment, as with the reflective lens l in the first embodiment, the lens can be designed according to the conditions, and the shape, size, and thickness of the lens can be varied depending on the design conditions. come.

In such a reflective lens antenna, the electromagnetic waves transmitted from the satellite 7 are reflected by the conductive reflective member 10 attached to the convex surface on which zoning is formed of the reflective lens 8, while the electromagnetic waves are reflected by the dielectric plano-convex lens. At 9, all the transmitted electromagnetic waves are converged in the same phase on the receiving pickup antenna section 4 disposed at the focal point of the reflective lens 8, and the electric field strength is increased to receive the reflective lens antenna in the first embodiment. The thickness of the plano-convex lens 9 constituting the reflective lens 8 is about 0.0 mm. Hc m,
Since the thickness is reduced to about ⅓ compared to the plano-convex lens in the first embodiment, the thickness is further reduced, the thickness is reduced, the weight is reduced, the cost is reduced, and the practicality and economical efficiency are improved.

Other functions and effects are the same as in the first embodiment described above.

Next, regarding the third embodiment of the present invention, FIGS. 121 to 1
This will be explained with reference to Figure 3b.

12th! Figures 1 to 6 are schematic vertical cross-sectional views showing a reflective lens 1 provided with a reinforcing member. This embodiment differs from the first and second embodiments described above in that the reflective lens 1 is provided with a reinforcing member 11, and the reinforcing member 11 is made of a low-loss dielectric material or the like. It is formed.

FIG. 121 shows an example in which a reinforcing member 11 is attached to the plane side surface of the plano-convex lens 2 in the reflective lens 1 in the first embodiment and reinforces the conductive reflective member 3, and FIG. 1 is a reinforcing member 11 for reinforcing the conductive reflective member lO attached to the convex side surface of the plano-convex lens 9 subjected to zoning in the reflective lens 8 in the second embodiment.
are arranged.
, 10 is provided with a reinforcing member 11 in a shape that covers the surfaces of the parts.

Further, Figures Ha and Hb show an example in which the reinforcing member 11 is disposed in a shape that covers the entire outer surface of the reflective lens 1, and here, the reinforcing member 11 is shown in the example of the reflective lens 1 in the first embodiment. There is. The reinforcing member 11 shown in FIG. Hb is formed in a shape that follows the convex shape of the reflective lens 8, but also in FIG. It is possible to form it into a shape that follows the convex shape of. Further, it is also possible to apply the present invention to the reflective lens 8 in the second embodiment.

In the reflective lens antenna having such a configuration, the strength of the conductive reflective members 3s, to of the reflective lens 1.8 or the entire reflective lenses 1 and 8 is increased, and the back surface of the reflective lens 1.8 is reinforced. , reflective lens 8 in the second embodiment
Also, since the back surface is formed as a flat surface, the structure is suitable for mounting on a flat surface.

In addition, in the reflective lens 8 in the second embodiment, since the zoning-shaped conductive reflective member 10 is covered in a flat shape, snow etc. are less likely to adhere to it, and weather resistance is increased.
Even if snow etc. adheres, it will adhere flatly, so
There is no risk of the beam cracking as would happen if snow adhered to the parabolic surface.

Other functions and effects are the same as in the first embodiment described above.

Next, a fourth embodiment of the present invention will be described with reference to FIG.

Figure 14 is a radome! Reflective lens 8 with 2 arranged
FIG.

This embodiment differs from the eleventh second and third embodiments described above in that a dielectric radome is provided in the reflective lens l.

FIG. 14 shows an example in which the radome 12 is disposed on the entire outer surface of the reflective lens 1 in the first embodiment.
The radome 12 may be provided on one side of the reflective lens 1, or may be provided directly on the reflective lens 1 or after a reinforcing member is provided.

Although the figure shows the reflective lens l in the first embodiment, it is also applicable to the reflective lens 8 in the second embodiment.

In such a reflective lens antenna, weather resistance is improved because the radome 12 prevents moisture from entering the reflective lens 1 and snow, dust, etc. from adhering to it.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 15 and 16.

Figure 15 is a schematic diagram showing an example of actual installation;
FIG. 16 is a schematic diagram showing an example of flat mounting and type mounting.

The embodiment of FIG.
The difference from each of the above embodiments is that a metal fitting 13 is provided on the back surface of the reflective lens 1.

In the example shown in FIG. 15, a fitting 13 and a support arm 14 are provided on the back side of the conductive reflective member 3 of the reflective lens 1 of the first embodiment in which the radome 12 is provided, and the support arm H The receiving pickup antenna section 4 is supported so as to be located at the focal point of the reflective lens l, and the antenna body is attached to a pole 14 by means of an attachment fitting 13.

Although the figure shows an example of the reflective lens 1 of the first embodiment, the reflective lens 8 of the second embodiment or the reflective lens 1.8 provided with the reinforcing member II shown in the third embodiment It is also possible to adapt to

Further, FIG. 16 shows an example of a type for flat mounting.

The reflective lens 1 can also be attached to a flat surface such as a wall of a building. That is, as shown in FIG. 16, the antenna itself is held by attaching a reflective lens l to a flat surface such as a wall.

In this example, since it is applicable to the reflective lens 1 whose back surface is flat, the reflective lens 8 of the second embodiment is applicable.
In the case of the reinforcing member +1 in the third embodiment. It is necessary to keep the back surface flat by arranging H. In this case, a support arm I6 is installed at the bottom of the reflective lens l.
is disposed, and the reception pickup antenna section 4 is supported by the support arm 16 so as to be located at the focal point of the reflective lens 1.

In such a reflective lens antenna, the reflective lens antenna can be easily arranged, and the reflective lens 1.
There is no need to position the receiving pickup antenna unit 4 disposed at the focal position of 8, and the time and effort required for installing the antenna are reduced.

Other functions and effects are similar to those of the first embodiment described above.

〔Effect of the invention〕

As detailed above, according to the reflective lens antenna of the present invention, the following effects and advantages can be obtained.

The electromagnetic waves transmitted from the satellite are reflected by a conductive reflective member attached to one surface of the dielectric plano-convex lens, and combined by matching the electrical path with the dielectric lens, so the transmitted electromagnetic waves pass through the lens twice. Furthermore, because zoning is formed, the lens thickness is 2.5 cm for a reflective lens in which a conductive reflective member is attached to the plano-convex lens's plano-side surface, and 0.8 for a reflective lens with a conductive reflective member attached to the
The lens thickness is 3 cm, which is significantly reduced compared to the lens thickness required for a transmission type lens in which the transmitted electromagnetic wave passes through the lens once, making it possible to provide a thin reflection type lens antenna. The thinness of this reflective lens antenna not only reduces weight, reduces material costs, and allows for thinner packaging, but also reduces installation space, so it is necessary to install it in a limited space such as an in-vehicle antenna. It is possible to supply a highly practical and economical satellite receiving antenna suitable for certain antennas.

In addition, a reflective lens antenna consists of a reflective lens that is made up of a dielectric lens and a conductive reflective member, and a reception pickup antenna that is made up of a radiator and a converter. Since it is simple,
Compared to conventional satellite receiving antennas, it has fewer components and is easier to manufacture, so manufacturing costs can be reduced.

Furthermore, depending on design conditions, if an offset-type reflective lens is configured, a reflective lens antenna can be installed on the flat surface of a building, making it easier to install the antenna compared to conventional satellite receiving antennas. Not only is this easy, but the installation space is also reduced. Furthermore, since it has a planar structure, it is less susceptible to wind pressure and is less likely to attract snow, etc., thus improving weather resistance against weather conditions.

Furthermore, if a reinforcing member is provided on the reflective lens,
The strength of the conductive reflective member of the reflective lens or the entire reflective lens is increased, and when a radome is installed, weather resistance is improved to prevent moisture from entering the reflective lens and snow and dust from adhering to the entire reflective lens. improves. Further, by disposing a reinforcing member on a reflective lens having a convex back surface, the back surface can be formed into a flat shape, and it is also possible to form a mold for mounting on a wall.

Furthermore, if a mounting bracket is provided on the reflective lens, the reflective lens antenna can be easily installed, and there is no need to position the receiving pickup antenna section to be placed at the focal point of the reflective lens. , the time and effort required to install the antenna are reduced.

[Brief explanation of drawings]

1 to 8 show a reflection type lens antenna according to a first embodiment of the present invention, and FIG. 1 is a schematic diagram of its configuration, FIG.
Figures 3s and 3b are explanatory diagrams of the coordinates for deriving the formula for the lens shape of the reflective lens, Figures 4x and 4b are explanatory diagrams for explaining the conditions, and Figure 5a is the diagram of the dielectric that constitutes the reflective lens. Figure 5b is a central longitudinal sectional view showing an example of a body-made lens, Figure 5b is a central cross-sectional view of the dielectric lens shown in Figure 51, Figure 6 is an explanatory diagram of the configuration of a reflective lens, and Figure 7 is an offset reflective lens. Fig. 8 is a central longitudinal cross-sectional view of the dielectric lens shown in Fig. 5a when the zoning is not formed, and Figs. A schematic diagram of the structure of a reflective lens antenna showing an example. Figure D is a coordinate explanatory diagram for deriving the formula for the lens shape of the reflective lens. Figure 11 is a diagram of the dielectric lens constituting the reflective lens. FIG.
Figures 2i and Bb and +3* and Hb are schematic vertical cross-sectional views of a reflective lens explaining a third embodiment of the present invention, and Figure 14 is a schematic longitudinal cross-sectional view of a reflective lens explaining a fourth embodiment of the present invention. 15 and 16 are schematic configuration diagrams showing an actual example of a reflective lens antenna for explaining the M5 embodiment of the present invention, and FIGS. 17 and 18 are schematic longitudinal sectional views of the conventional FIG. 2 is a perspective view showing a satellite receiving antenna. 1.8... Reflective lens, 2.9... Dielectric lens, 3.10... Conductive reflective member, 4... Receiving pickup antenna section, 5... Radiator, 6 ...Converter, 7...Satellite, II...Reinforcement member, H...
Radome, 13... Mounting is metal fittings, eye, 16... Support arm, 1 To... Mounting is pole, F... Focus. Agent Patent Attorney Yoshihiko Iinuma Figure 40 Figure 4b [:i Figure 30 Figure 3b Figure 5a Figure 5b Figure 90 Figure 9b Figure 10 Figure 11 Figure 130Figure 13bFigure 12aFigure 12bFigure 15Figure 17Figure 18

Claims (6)

[Claims] (1) A dielectric plano-convex lens with one surface formed flat and the other surface convex and a receiving pickup antenna section, and a conductive reflective member on the plano-side surface of the plano-convex lens. A reflective lens antenna, characterized in that a reflective lens is formed by attaching a reflective lens, and the receiving pickup antenna section is disposed at a focal position of the reflective lens. (2) A dielectric plano-convex lens with one surface formed flat and the other surface convex and a receiving pickup antenna section, and a conductive reflective member on the convex surface of the plano-convex lens. A reflective lens antenna, characterized in that a reflective lens is formed by attaching a reflective lens, and the receiving pickup antenna section is disposed at a focal position of the reflective lens. (3) According to claim (1) or (2), the conductive reflective member is attached to one surface of one of the dielectric plano-convex lenses by metal adhesion or vapor deposition. Reflective lens antenna as described. (4) Claims (1) to (3) characterized in that a dielectric reinforcing member is attached to the reflective lens.
The reflective lens antenna according to any one of the above. (5) The reflective lens antenna according to any one of claims (1) to (4), wherein a dielectric radome is attached to the reflective lens. (6) A mounting bracket and a support arm are attached to the back of the reflective lens, and the upper end of the pole is pivotally attached to the mounting bracket, and the support arm is placed at the focal point of the reflective lens for the receiving pickup. Claim (1) characterized in that the antenna part is provided so as to be able to be held.
The reflective lens antenna according to any one of (5) to (5).