JPH0412706U - - Google Patents
Info
- Publication number
- JPH0412706U JPH0412706U JP5367090U JP5367090U JPH0412706U JP H0412706 U JPH0412706 U JP H0412706U JP 5367090 U JP5367090 U JP 5367090U JP 5367090 U JP5367090 U JP 5367090U JP H0412706 U JPH0412706 U JP H0412706U
- Authority
- JP
- Japan
- Prior art keywords
- axis
- rotational symmetry
- reflector
- parabola
- focus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims 1
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
第１図はこの考案の実施例によるリングフオー
カスアンテナを示す断面側面図、第２図は従来の
リングフオーカスアンテナを示す断面図である。
図において１は主反射鏡、２は副反射鏡、３は
１次放射器、４は主反射鏡の焦点、５は１次放射
器の位相中心、６は回転対称軸、７は放物線の軸
、８は他の周波数帯用アンテナの主反射鏡、９は
他の周波数帯用アンテナの１次放射器である。な
お、図中、同一符号は同一、又は相当部分を示す
。
FIG. 1 is a sectional side view showing a ring focus antenna according to an embodiment of this invention, and FIG. 2 is a sectional view showing a conventional ring focus antenna. In the figure, 1 is the main reflector, 2 is the sub-reflector, 3 is the primary radiator, 4 is the focal point of the main reflector, 5 is the phase center of the primary radiator, 6 is the axis of rotational symmetry, and 7 is the axis of the parabola. , 8 is the main reflector of the antenna for other frequency bands, and 9 is the primary radiator of the antenna for other frequency bands. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
置いた１次放射器とからなり、上記鏡面の断面形
状が、回転対称軸から偏位し、かつ回転対称軸に
平行な軸をもつ放物線の一部であり、中心部分に
鏡面の存在しない領域をもつ主反射鏡と、上記放
物線の焦点に、１つの焦点が一致し、他の焦点が
１次放射器の位相中心に一致する楕円または双曲
線の一部であり、回転対称軸に垂直な平面へ投影
したときに上記主反射鏡の存在しない領域内に含
まれる副反射鏡とから成るリングフオーカスアン
テナにおいて、上記副反射鏡の主反射鏡とは逆側
の面に、他の周波数帯用のアンテナを設置したこ
とを特徴とするリングフオーカスアンテナ。 (2) ２枚の回転対称な鏡面と、回転対称軸上に
置いた１次放射器とからなり、上記鏡面の断面形
状が回転対称軸から偏位し、かつ回転対称軸に平
行な軸をもつ放物線の一部であり、中心部分に鏡
面の存在しない領域をもつ主反射鏡と、上記放物
線の焦点に１つの焦点が一致し、他の焦点が１次
放射器の位相中心に一致する楕円または双曲線の
一部であり、回転対称軸に垂直な平面へ投影した
ときに、上記主反射鏡の存在しない領域内に含ま
れる副反射鏡とから成るリングフオーカスアンテ
ナにおいて、上記副反射鏡の主反射鏡とは逆側の
面に、光学センサを配置したことを特徴とするリ
ングフオーカスアンテナ。[Claims for Utility Model Registration] (1) Consisting of two rotationally symmetrical mirror surfaces and a primary radiator placed on the axis of rotational symmetry, the cross-sectional shape of the mirror surface is deviated from the axis of rotational symmetry, and a main reflecting mirror that is part of a parabola with an axis parallel to the axis of rotational symmetry and has a region in the center where no mirror surface exists; one focal point coincides with the focal point of the parabola, and the other focal point A ringform consisting of a sub-reflector that is part of an ellipse or hyperbola that coincides with the phase center of the secondary radiator, and that is included in an area where the main reflector does not exist when projected onto a plane perpendicular to the axis of rotational symmetry. A ring focus antenna, characterized in that an antenna for another frequency band is installed on the side of the sub-reflector opposite to the main reflector. (2) Consists of two rotationally symmetrical mirror surfaces and a primary radiator placed on the axis of rotational symmetry, with the cross-sectional shape of the mirror surface being deviated from the axis of rotational symmetry, and with an axis parallel to the axis of rotational symmetry. A main reflecting mirror that is part of a parabola with no mirror surface in the center, and an ellipse whose one focus coincides with the focus of the parabola and whose other focus coincides with the phase center of the primary radiator. Or, in a ring focus antenna consisting of a sub-reflector that is part of a hyperbola and is included in an area where the main reflector does not exist when projected onto a plane perpendicular to the axis of rotational symmetry, the sub-reflector A ring focus antenna characterized by having an optical sensor placed on the opposite side of the main reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5367090U JPH0412706U (en) | 1990-05-23 | 1990-05-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5367090U JPH0412706U (en) | 1990-05-23 | 1990-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0412706U true JPH0412706U (en) | 1992-01-31 |
Family
ID=31575057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5367090U Pending JPH0412706U (en) | 1990-05-23 | 1990-05-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0412706U (en) |
-
1990
- 1990-05-23 JP JP5367090U patent/JPH0412706U/ja active Pending