JP3384886B2 - Satellite receiving antenna - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite receiving antenna used when receiving satellite broadcasting (BS) or satellite communication (CS).

[0002]

2. Description of the Related Art Generally, geostationary satellites (BS, C) above the equator.
When receiving the broadcast signal or the communication signal from S), the azimuth angle and the elevation angle with respect to the satellite change according to the receiving point.

For this reason, when one satellite receiving antenna is used in a relatively wide area range, it is necessary to adjust the azimuth angle and the elevation angle in two axes each time the receiving point is changed.

[0004]

However, in the above-mentioned conventional satellite receiving antenna, since it is necessary to perform the direction adjustment on two axes, the direction adjustment is not only troublesome, and the antenna mounting metal fitting is complicated. However, there is a problem that the cost becomes high due to the different structure.

The present invention has been made in view of the above problems, and within a predetermined wide range defined in advance, it is not necessary to perform elevation angle adjustment, and direction adjustment can be easily performed by uniaxial adjustment of only azimuth angle. It is an object of the present invention to provide a low-cost satellite receiving antenna that makes possible.

[0006]

That is, a first satellite receiving antenna according to the present invention is provided with a preset ground range.
The elevation angle plane (vertical plane) directivity is set to a range wider than the azimuth plane (horizontal plane) directivity corresponding to the satellite reception elevation angle non-adjustment range in the circle , and the horizontal length is greater than the vertical length.
Even if the satellite is received in any of the long elevation angle unadjusted range
Corresponding to the horizontal rectangular antenna reflector with a dimension aspect ratio of "1: 2.5 or more" that can obtain a predetermined reception gain , and the elevation plane directionality and azimuth plane directionality of this antenna reflector. A primary radiator for receiving satellite signals reflected and converged by the antenna reflector , and the antenna reflector and one
Installation angle in the elevation direction of the antenna body consisting of the secondary radiator
The elevation angle according to the receiving point of the antenna.
The unadjusted range is a high-elevation angle-unadjusted range or a medium-elevation angle-unadjusted range.
Change the setting so that it is set to the unadjusted range of
It is provided with a fixed elevation angle range switching mechanism .

[0007]

Further, the second satellite receiving antenna according to the present invention has a directivity of elevation angle (vertical plane) corresponding to an unadjusted range of satellite reception elevation angle in a preset ground range. (Horizontal plane) is set to a wider range than directivity ,
Horizontal length longer than vertical length without adjustment of elevation angle
The desired reception gain is obtained regardless of the satellite reception in the range.
The size aspect ratio is "1: 2.5 or more" Horizontal that the length of the
The antenna reflector has a rectangular shape, and the antenna reflector has a different vertical plane directivity and horizontal plane directivity corresponding to the elevation plane directivity and the azimuth plane directivity, respectively, and is reflected and converged by the antenna reflector. A primary radiator for receiving satellite signals, and an elevation angle range corresponding to the directivity of the elevation surface of the antenna reflector, with the primary radiator slidingly displaced up and down in the vertical direction relative to the antenna reflector. The relevant
Depending on the receiving point by the antenna, the elevation angle unadjusted range
Surrounding area is low-elevation angle unadjusted range or medium-elevation angle unadjusted range or high
A radiator slide mechanism for switching and fixing so as to be set in a non-adjustable range of elevation angle is configured.

Further, the third satellite receiving antenna according to the present invention has an elevation angle plane (vertical surface) directivity corresponding to an azimuth plane (vertical plane) corresponding to a satellite reception elevation angle non-adjustment range in a preset ground range. (Horizontal plane) is set to a wider range than directivity ,
Horizontal length longer than vertical length without adjustment of elevation angle
The desired reception gain is obtained regardless of the satellite reception in the range.
The size aspect ratio is "1: 2.5 or more" Horizontal that the length of the
The antenna reflector has a rectangular shape, and the antenna reflector has a different vertical plane directivity and horizontal plane directivity corresponding to the elevation plane directivity and the azimuth plane directivity, respectively, and is reflected and converged by the antenna reflector. An elevation angle range corresponding to the elevation plane directivity of the antenna reflector, where the primary radiator for receiving satellite signals and the antenna reflector are vertically displaced with respect to the primary radiator in the upper, lower, and lower stages. The relevant
Depending on the receiving point by the antenna, the elevation angle unadjusted range
Surrounding area is low-elevation angle unadjusted range or medium-elevation angle unadjusted range or high
It is provided with a reflecting mirror slide mechanism that is switched and fixed so as to be set in an elevation-unadjusted range .

[0010]

That is, in the first satellite receiving antenna,
The elevation angle to the satellite falls within the preset ground range.
At a point corresponding to the satellite reception elevation angle unadjusted range, satellite reception can be performed only by adjusting the azimuth angle without requiring any elevation angle adjustment. Moreover, the antenna reflector and
Installation angle in the elevation direction of the antenna body consisting of the primary radiator
Is the elevation angle depending on the receiving point of the antenna.
The unadjusted range is a high-elevation angle-unadjusted range or a medium-elevation angle-unadjusted range.
Elevation angle range so that it can be set in the range
Since it is fixed by switching by the switching mechanism, the cost can be reduced by simplifying the mounting bracket.

[0011]

In the second satellite receiving antenna, the elevation angle with respect to the satellite is set in the preset ground range.
At the point corresponding to the satellite reception elevation angle non-adjustment range in, the satellite reception can be performed only by adjusting the azimuth angle without any adjustment of the elevation angle. Moreover, the primary radiator is placed above and below the antenna reflector. The elevation angle range corresponding to the elevation angle plane directivity of the antenna reflector is received by the antenna by shifting the slide position in the upper direction , interruption, and lower direction.
Depending on the point, the elevation angle unadjusted range is low elevation angle unadjusted
Range or mid-elevation non-adjustment range or high elevation non-adjustment range
Fixed by switching with the radiator slide mechanism so that it is set.
Since it is fixed, the cost can be reduced by simplifying the mounting hardware.

In the third satellite receiving antenna, the elevation angle with respect to the satellite is set in the preset ground range.
At the point corresponding to the satellite reception elevation angle non-adjustment range in, the satellite reception can be performed only by adjusting the azimuth angle without any adjustment of the elevation angle. Moreover, the antenna reflector is placed above and below the primary radiator. The elevation angle range corresponding to the elevation angle plane directivity of the antenna reflector is received by the antenna by shifting the slide position in the upper direction , interruption, and lower direction.
Depending on the point, the elevation angle unadjusted range is low elevation angle unadjusted
Range or mid-elevation non-adjustment range or high elevation non-adjustment range
As set, it is fixed by switching with the reflecting mirror slide mechanism.
Since it is fixed, the cost can be reduced by simplifying the mounting hardware.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the external configuration of a satellite receiving antenna. The antenna reflector 11 is set such that its length in the elevation angle direction (perpendicular to the aperture plane) is set to a length at which a beam is formed corresponding to a preset elevation angle unadjusted range, and in the azimuth direction (horizontal plane horizontal). If the length (direction) is within the elevation angle non-adjustment range, the length is set according to the area of the reflecting mirror that can obtain a predetermined gain at any elevation angle.

Here, the non-adjusted elevation angle range is, for example, an elevation angle range (= 6 °) that covers one division range when the whole of Japan is divided into three according to the elevation angle with respect to the satellite.
The predetermined gain is, for example, a gain necessary for receiving satellite broadcasting (BS) in Honshu.

In this case, the dimensional aspect ratio of the antenna reflecting mirror 11 is about 1: 2.5 to 3.2. In the case of the present embodiment, the antenna reflecting mirror 11 has an elevation angle direction (aperture surface vertical direction) of about 200 mm and an azimuth direction (aperture surface horizontal direction) of about 580 mm.
It is configured in a horizontally long rectangular shape of 2.9, and a primary radiator 13 is arranged in front of the opening surface of the antenna reflecting mirror 11 via a support arm 15.

The primary radiator 13 receives the satellite signal reflected and focused by the antenna reflecting mirror 11 and supplies it to the converter 14 to convert and amplify it into a received signal of an intermediate frequency. The antenna reflector 1
Corresponding to the difference between the horizontal (azimuth) direction opening angle and the vertical (elevation angle) direction opening angle of 1, the vertical plane directivity is set to be narrower than the horizontal plane directivity.

In this case, the primary radiator 13 can obtain a constant reception gain for all the end faces of the antenna reflector 11. That is, as the primary radiator 13, an antenna element having a vertically narrowed beam width, such as a vertically arrayed array antenna, is used. Will be improved.

FIG. 2 is a side view showing a fixed installation state of the satellite receiving antenna. The antenna reflecting mirror 11 of the satellite receiving antenna is attached and fixed to a mast 16 via a mounting bracket 12 and a mounting band 17, and the mounting bracket 12 has an elevation angle non-adjustable range of the reflecting mirror 11.
For example, between the "Hokkaido"-"Southern Tohoku" area and the low elevation angle fixed hole 18 which is set at 6 degrees of 29 ° -35 °, and the "Southern Tohoku"-"Kansai" area. Medium elevation angle fixing hole 19 set to 6 degrees of 35 ° to 41 °, and high elevation angle set to 6 degrees of 41 ° to 47 ° corresponding to the “Kansai” to “Kyushu” areas. Fixing hole 2
0 is provided around the elevation angle rotation shaft 12a.

That is, the fitting 12 and the fitting 1
2, a low elevation angle fixing hole 18, a middle elevation angle fixing hole 19,
The high-elevation-angle fixing hole 20 constitutes a mechanism for switching the elevation-angle non-adjustment range.

FIG. 3 is a diagram showing each reception area by the satellite receiving antenna when the whole of Japan (excluding Okinawa and remote islands) is divided into three parts according to the satellite reception elevation angle. When the receiving point is "Northern Hokkaido", "Southern Tohoku", "Kansai", "Southern Kyushu", the receiving elevation angle is set to the maximum elevation angle or the minimum elevation angle in the elevation non-adjustment range, and relatively -1 ( d
Since the gain decrease of B) is caused, the horizontal (azimuth) direction length of the antenna reflecting mirror 11 is set to a length at which a predetermined gain is obtained in consideration of this gain decrease.

That is, in the satellite receiving antenna having the above-described structure, for example, in order to set the receiving point in the area A between "Hokkaido" and "Southeast Tohoku", the antenna reflector 11 is fixed to the mounting bracket 12 for low elevation angles. Since the elevation angle is set in the elevation angle non-adjustment range of 29 ° to 35 ° using the hole 18, the elevation angle adjustment is performed regardless of any point from “Hokkaido” to “Southeast Tohoku” as a reception point. There is no need, and satellite reception can be performed only by adjusting the azimuth angle by rotating the mast 16.

Further, in the satellite receiving antenna having the above-mentioned structure, for example, in order to set the area B between "Southern Tohoku" to "Kansai" as a receiving point, the antenna reflector 11 is fixed to the mounting bracket 12 for middle and high angles. Since the elevation angle is set in the elevation angle non-adjustment range of 35 ° to 41 ° using the hole 19, the elevation angle adjustment is performed regardless of any of the points from “Southern Tohoku” to “Kansai” as the receiving point. There is no need, and satellite reception can be performed only by adjusting the azimuth angle by rotating the mast 16.

Further, in the satellite receiving antenna having the above structure, for example, the area C between "Kansai" to "Kyushu"
In order to set the receiving point to, the antenna reflector 11 uses the high-elevation-angle fixing hole 20 of the mounting bracket 12 and its elevation angle is 4
Since the elevation angle is not adjusted in the range of 1 ° to 47 °, it is not necessary to adjust the elevation angle regardless of any of the points from “Kansai” to “Kyushu”, and the azimuth angle is adjusted by rotating the mast 16. Satellite reception will be possible only.

Here, in the satellite receiving antenna, regardless of whether the direction of the satellite to be received is the maximum angle or the minimum angle of the elevation angle unadjusted range, the antenna will be able to obtain a predetermined reception gain required in Honshu. Since the horizontal (azimuth) direction length of the reflecting mirror 11 is set, in the case of each of the above-mentioned receiving points, "Northern Hokkaido", "Southern Tohoku", "Kansai", "Southern Kyushu"
In either case, the elevation angle need not be adjusted, and the satellite reception can be performed with a predetermined gain only by adjusting the azimuth angle by rotating the mast 16.

Therefore, according to the satellite receiving antenna having the above-described structure, the vertical (elevation angle) length of the antenna reflecting mirror 11 corresponds to one division range when, for example, the whole of Japan is divided into three according to the satellite elevation angle. Is set as an elevation angle unadjusted range in which a beam is formed in an angle range of 6 °, and a predetermined reception gain is obtained even if the satellite is received in any horizontal (azimuth) direction length within the elevation angle unadjusted range. The length you get,
Dimensional aspect ratio "1: 2." In which the vertical plane directivity and the horizontal plane directivity of the primary radiator 13 are made to correspond to the vertical aperture length and the horizontal aperture length of the antenna reflecting mirror 11, respectively.
Since it is set to a different width of "5 or more", at a point where the elevation angle with respect to the satellite corresponds to the elevation non-adjustment range, the satellite reception with a predetermined gain can be performed only by the azimuth adjustment without any elevation angle adjustment. It can be performed, and the cost can be reduced by simplifying the mounting hardware.

Further, the mounting bracket 12 of the antenna reflecting mirror 11 has an elevation angle non-adjustable range in the antenna reflecting mirror 11 centered on the elevation angle rotating shaft 12a, for example, 29.
Low elevation angle fixing hole 18 set to 6 degrees of 3 ° to 35 °, and 3
A middle-elevation angle fixing hole 19 which is set to 6 degrees of 5 ° to 41 °,
Since the fixed hole 20 for high elevation angle which is set to 6 degrees of 41 ° to 47 ° is provided and configured, for example, “Hokkaido” to “Southeastern Tohoku”, “Southern Tohoku” to “Kansai” divided into three parts of Japan.
In each of the areas A, B, and C from "Kansai" to "Kyushu," it is possible to switch to the optimum elevation angle non-adjustment range, and any elevation angle adjustment is required in any of the areas A, B, and C. Without doing so, satellite reception with a predetermined gain can be performed only by adjusting the azimuth angle.

In the above embodiment, the antenna reflector 1
Corresponding the 6 ° elevation angle non-adjustment range in 1 to each area A, B, C when the whole of Japan is divided into three,
Low elevation range (29 ° -35 °), Medium elevation range (35 °-
41 °) and a high elevation angle range (41 ° to 47 °) in a stepwise manner, the low elevation angle fixing hole 18, the middle elevation angle fixing hole 19 and the high elevation angle provided in the mounting bracket 12 of the antenna reflector 11 are used. By selectively using the fixing hole 20 for the antenna, the elevation angle installation angle of the antenna reflector 11 and the primary radiator 13 is set to the low elevation angle A, the middle elevation angle B, and the elevation angle rotation axis 12a as the center.
Although the rotation angle is changed to the high elevation angle C, the antenna reflecting mirror 11 is always fixed and the installation position of the primary radiator 13 with respect to the reflecting mirror 11 is vertically displaced, or the primary radiator 13 is moved. A configuration may be adopted in which the antenna reflection mirror 11 is installed in a fixed state at all times and the installation position of the antenna reflection mirror 11 is deviated in the vertical direction to perform the stepwise switching of the elevation angle non-adjustment range.

FIG. 4 is a side view showing a fixed installation state of the satellite receiving antenna having a radiator sliding function.
That is, in the satellite receiving antenna in FIG. 4, the antenna reflecting mirror 11 and the support arm 15 having the elevation angle unadjusted range are always fixed to the mast 16 via the mounting bracket 12.

Then, the primary radiator 13 and the converter 1
4 is attached to the tip of the support arm 15 via the radiator slide mechanism 21 so as to be vertically slidable. That is, the primary radiator 13 and the converter 14
As shown by arrow X in the figure, when it is slid upward and fixed, the primary radiator 13 causes the antenna reflector 1 to move.
The satellite reflection elevation angle via 1 was changed to the low elevation side, and
As shown by the arrow Y in the figure, when the slide reflection is downwardly fixed, the satellite reflection elevation angle is changed to the high elevation angle side.

Therefore, the installation positions of the primary radiator 13 and the converter 14 are set with respect to the antenna reflecting mirror 11.
By vertically shifting the upper stage A, the interruption B and the lower stage C, the elevation-unadjusted range corresponding to each of the three divided areas A, B and C in Japan can be switched stepwise. .

FIG. 5 is a side view showing a fixed installation state of the satellite receiving antenna having a reflecting mirror sliding function.
That is, in the satellite receiving antenna in FIG. 5, the primary radiator 13, the converter 14, and the support arm 15 are always fixed to the mast 16 via the mounting bracket 12.

The antenna reflecting mirror 11 having a non-adjustable elevation angle range is mounted on the end of the mounting bracket 12 so as to be vertically slidable via reflector sliding mechanisms 22a and 22b.

That is, when the antenna reflecting mirror 11 is slid upward and fixed as shown by the arrow X in the figure, the satellite reflection elevation angle from the primary radiator 13 via the antenna reflecting mirror 11 is on the low elevation side. Has been changed to the arrow Y in the figure.
As shown by, slide it downward and fix it,
The satellite reflection elevation angle is changed to a high elevation angle side.

Therefore, the installation position of the antenna reflecting mirror 11 is vertically displaced with respect to the primary radiator 13 in the upper direction A, the interruption B, and the lower position C to vertically shift the three-divided area A in Japan. It is possible to perform stepwise switching of the elevation angle non-adjustment range corresponding to each of B and C.

[0036]

As described above, according to the first satellite receiving antenna of the present invention, at the point where the elevation angle with respect to the satellite corresponds to the satellite reception elevation angle unadjusted range in the preset ground range , It is possible to receive satellites only by adjusting the azimuth angle without requiring any elevation angle adjustment, and the antenna book consists of an antenna reflector and a primary radiator.
The elevation angle of the body depends on the receiving location of the antenna.
Depending on the point, the elevation angle unadjusted range is the high elevation angle unadjusted range.
Set in the range or no adjustment range for middle and high elevation angles or for no adjustment range for low elevation angles.
Fixed by switching by the elevation angle range switching mechanism so that it is fixed
Therefore, the cost can be reduced by simplifying the mounting bracket.

[0037]

According to the second satellite receiving antenna of the present invention, the elevation angle with respect to the satellite is set in advance in the ground range.
In the area corresponding to the satellite reception elevation angle non-adjustment range in the circle, satellite reception can be performed only by adjusting the azimuth angle without requiring any elevation angle adjustment. The elevation angle range corresponding to the elevation plane directivity of the antenna reflecting mirror can be received by the antenna by vertically displacing the upper stage, the interruption, and the lower stage.
Depending on the point, the elevation angle unadjusted range is low elevation angle unadjusted
Range or mid-elevation non-adjustment range or high elevation non-adjustment range
Fixed by switching with the radiator slide mechanism so that it is set.
The cost can be reduced by simplifying the mounting hardware.

According to the third satellite receiving antenna of the present invention, the elevation angle with respect to the satellite is set in advance in the ground range.
In the area corresponding to the satellite reception elevation angle non-adjustment range in the circle, satellite reception can be performed only by adjusting the azimuth angle without requiring any elevation angle adjustment. The elevation angle range corresponding to the elevation plane directivity of the antenna reflecting mirror can be received by the antenna by vertically displacing the upper stage, the interruption, and the lower stage.
Depending on the point, the elevation angle unadjusted range is low elevation angle unadjusted
Range or mid-elevation non-adjustment range or high elevation non-adjustment range
As set, it is fixed by switching with the reflecting mirror slide mechanism.
The cost can be reduced by simplifying the mounting hardware.

Therefore, according to the present invention, it is possible to easily perform the direction adjustment by the uniaxial adjustment of only the azimuth angle without the need to adjust the elevation angle within the predetermined wide range.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external configuration of a satellite receiving antenna according to an embodiment of the present invention.

FIG. 2 is a side view showing a fixed installation state of the satellite receiving antenna.

FIG. 3 is a diagram showing each reception area by the satellite receiving antenna when the whole of Japan (excluding Okinawa and remote islands) is divided into three parts according to the satellite reception elevation angle.

FIG. 4 is a side view showing a fixed installation state of the satellite receiving antenna having a radiator slide function.

FIG. 5 is a side view showing a fixed installation state of the satellite receiving antenna having a reflecting mirror sliding function.

[Explanation of symbols]

11 ... Antenna reflecting mirror, 12 ... Mounting bracket, 12a ... Elevation angle rotating shaft, 13 ... Primary radiator, 14 ... Converter, 15
... Support arm, 16 ... Mast, 17 ... Mounting band, 1
8 ... Low elevation angle fixing hole, 19 ... Medium elevation angle fixing hole, 20 ... High elevation angle fixing hole, 21 ... Radiator slide mechanism, 22a, 2a
2b ... Reflector slide mechanism, A ... Low elevation angle area, B ... Medium elevation angle area, C ... High elevation angle area.

Continuation of front page (56) Reference JP-A-4-368009 (JP, A) JP-A-2-43803 (JP, A) JP-A-2-295301 (JP, A) JP-A-4-167840 (JP , A) JP 6-152223 (JP, A) JP 56-165405 (JP, A) JP 63-87807 (JP, A) JP 61-9001 (JP, A) JP 60-117803 (JP, A) Actual flat 5-48416 (JP, U) Actual flat 7-20709 (JP, U) Actual flat 5-85110 (JP, U) Actual flat 3-105104 (JP, U) Actually open 6-85512 (JP, U) Actually open 61-68513 (JP, U) Actually open 62-85007 (JP, U) Japanese public Sho 50-32799 (JP, B1) Japanese public Sho 50 −28147 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01Q 19/12 H01Q 3/04

Claims (3)

(57) [Claims] In a satellite receiving antenna for receiving an incoming radio wave from a satellite, an elevation angle plane (vertical plane) directivity corresponding to a satellite reception elevation angle non-adjusted range in a ground range set in advance. Is set to a wider range than the azimuth plane (horizontal plane) directivity , and the horizontal length is
Is longer than the vertical length of the
A horizontally long rectangular antenna reflector with a dimension aspect ratio of "1: 2.5 or more" that can obtain a predetermined reception gain even if it is received by the satellite, and an elevation plane of this antenna reflector. A primary radiator that has different vertical plane directivity and horizontal plane directivity corresponding to the directivity and the azimuth plane directivity, and receives a satellite signal reflected and converged by the antenna reflector , and the antenna reflector and Antenna book consisting of a primary radiator
Set the elevation angle of the body to the receiving location of the antenna.
Depending on the point, the elevation angle unadjusted range is the high elevation angle unadjusted range.
Set in the range or no adjustment range for middle and high elevation angles or for no adjustment range for low elevation angles.
Elevation angle range switching mechanism that switches and fixes as specified
When a satellite receiving antenna which is characterized by comprising a. 2. A satellite receiving antenna for receiving an incoming radio wave from a satellite, the elevation angle plane (vertical plane) directivity of a satellite reception elevation angle unadjusted range in a preset ground range. Is set to a wider range than the azimuth plane (horizontal plane) directivity , and the horizontal length is
Is longer than the vertical length of the
A horizontally long rectangular antenna reflector with a dimension aspect ratio of "1: 2.5 or more" that can obtain a predetermined reception gain even if it is received by the satellite, and an elevation plane of this antenna reflector. A primary radiator for receiving satellite signals reflected and converged by the antenna reflector, the primary radiator having different vertical plane directivity and horizontal plane directivity corresponding to the directivity and the azimuth plane directivity; Up and down with respect to the antenna reflector
Upper, middle, to lower the slide deflection, the elevation of the range corresponding to the elevation plane directivity of the antenna reflector, the antenna
The elevation angle unadjusted range is low
No adjustment range 囲又the middle elevation unregulated range or high elevation angle of the elevation
An antenna for satellite reception, comprising: a radiator slide mechanism that is switched and fixed so as to be set in an unadjusted range . 3. A satellite receiving antenna for receiving an incoming radio wave from a satellite, the elevation angle plane (vertical plane) directivity of a satellite reception elevation angle unadjusted range within a preset ground range. Is set to a wider range than the azimuth plane (horizontal plane) directivity , and the horizontal length is
Is longer than the vertical length of the
A horizontally long rectangular antenna reflector with a dimension aspect ratio of "1: 2.5 or more" that can obtain a predetermined reception gain even if it is received by the satellite, and an elevation plane of this antenna reflector. A primary radiator having different vertical plane directivity and horizontal plane directivity corresponding to the directivity and the azimuth plane directivity, and receiving the satellite signal reflected and converged by the antenna reflector, and the antenna reflector Up and down with respect to the primary radiator
Upper, middle, to lower the slide deflection, the elevation of the range corresponding to the elevation plane directivity of the antenna reflector, the antenna
The elevation angle unadjusted range is low
No adjustment range of elevation angle or no adjustment range of middle elevation angle or high elevation angle
An antenna for satellite reception, comprising: a reflecting mirror slide mechanism that is switched and fixed so as to be set in an unadjusted range .