JP2580225Y2 - Primary radiator for Cassegrain antenna - Google Patents

Primary radiator for Cassegrain antenna

Info

Publication number
JP2580225Y2
JP2580225Y2 JP6051592U JP6051592U JP2580225Y2 JP 2580225 Y2 JP2580225 Y2 JP 2580225Y2 JP 6051592 U JP6051592 U JP 6051592U JP 6051592 U JP6051592 U JP 6051592U JP 2580225 Y2 JP2580225 Y2 JP 2580225Y2
Authority
JP
Japan
Prior art keywords
primary radiator
cassegrain antenna
horn
blower
outer peripheral
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.)
Expired - Lifetime
Application number
JP6051592U
Other languages
Japanese (ja)
Other versions
JPH0619309U (en
Inventor
亮司 葛屋
啓文 朝倉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP6051592U priority Critical patent/JP2580225Y2/en
Publication of JPH0619309U publication Critical patent/JPH0619309U/en
Application granted granted Critical
Publication of JP2580225Y2 publication Critical patent/JP2580225Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Waveguide Aerials (AREA)
  • Aerials With Secondary Devices (AREA)

Description

【考案の詳細な説明】[Detailed description of the invention]

【0001】[0001]

【産業上の利用分野】本考案は、反射によるカセグレン
アンテナの放射指向特性の劣化を防止するようにしたカ
セグレンアンテナ用一次放射器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary radiator for a Cassegrain antenna which prevents deterioration of the radiation directivity of the Cassegrain antenna due to reflection.

【0002】[0002]

【従来の技術】従来のカセグレンアンテナ用一次放射器
は、通常、図3に示すように、ホーン本体1と、このホ
ーン本体1上部に設けたホーンブロワ20で構成してあ
る。そして、ホーンブロワ20の外周面すなわち、上面
部20aと正面部20b及び側面部20cはそれぞれ単
一の平面によって形成されている。
2. Description of the Related Art A conventional primary radiator for a Cassegrain antenna generally comprises a horn body 1 and a horn blower 20 provided on the horn body 1 as shown in FIG. The outer peripheral surface of the horn blower 20, that is, the upper surface portion 20a, the front surface portion 20b, and the side surface portion 20c are each formed by a single plane.

【0003】[0003]

【考案が解決しようとする課題】上述した従来のカセグ
レンアンテナ用一次放射器は、ホーンブロワ20の外周
面が単一の平面で形成されているため、副反射鏡におい
て反射した電波の一部が、ホーンブロワ20の外周面、
特に平面部20に反射し、これが反射波となって主反射
鏡の一部の領域に照射されてしまう。そして、この反射
波がカセグレンアンテナの照射指向特性に重畳され、放
射指向特性が劣化するといった問題があった。
In the above-mentioned conventional primary radiator for a Cassegrain antenna, since the outer peripheral surface of the horn blower 20 is formed by a single plane, a part of the radio wave reflected by the sub-reflector is Outer peripheral surface of the horn blower 20,
In particular, the light is reflected by the flat portion 20 and becomes a reflected wave, which is applied to a partial area of the main reflecting mirror. Then, there is a problem that the reflected wave is superimposed on the irradiation directivity of the Cassegrain antenna, thereby deteriorating the radiation directivity.

【0004】本考案は上述した問題点にかんがみてなさ
れたものであり、反射波によるカセグレンアンテナの放
射指向特性の劣化を防止することのできるカセグレンア
ンテナ用一次放射器の提供を目的とする。
The present invention has been made in view of the above-described problems, and has as its object to provide a primary radiator for a Cassegrain antenna that can prevent deterioration of the radiation directivity of the Cassegrain antenna due to a reflected wave.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するた
め、本考案のカセグレンアンテナ用ホーンは、上記ホー
ンブロワの外周面を、多数の傾斜面を備えた多面体と
し、このホーンブロワに照射された電波を主反射鏡の領
域外に散乱させる構成としてある。
In order to achieve the above object, a horn for a Cassegrain antenna according to the present invention is provided in which the outer peripheral surface of the horn blower is a polyhedron having a large number of inclined surfaces, and a radio wave applied to the horn blower is transmitted. It is configured to scatter light outside the area of the main reflecting mirror.

【0006】[0006]

【作用】上記構成からなる本考案のカセグレンアンテナ
用一次放射器によれば、副反射鏡を介してホーンブロワ
外周面に照射された電波は、当該ホーンブロワ外周面を
形成する多数の傾斜面に反射して主反射鏡の領域外に散
乱する。
According to the primary radiator for a Cassegrain antenna of the present invention having the above-described structure, the radio wave radiated to the outer peripheral surface of the horn blower via the sub-reflector is reflected on a number of inclined surfaces forming the outer peripheral surface of the horn blower. Scattered outside the area of the main mirror.

【0007】[0007]

【実施例】以下、本考案に係るカセグレンアンテナ用一
次放射器の実施例について、図面を参照しつつ説明す
る。図1は本実施例に係るカセグレンアンテナ用一次放
射器を示すものであり、同図(a)は側面図,同図
(b)は正面図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a primary radiator for a Cassegrain antenna according to the present invention will be described below with reference to the drawings. 1A and 1B show a primary radiator for a Cassegrain antenna according to the present embodiment. FIG. 1A is a side view, and FIG. 1B is a front view.

【0008】同図において、本実施例のカセグレンアン
テナ用一次放射器は、ホーン本体1とホーンブロワ2か
らなり、ホーン本体1の上部にホーンブロワ2を設けた
構成となっている。ホーンブロワ2の外周面は、八つの
傾斜面を備えた多面体となっている。これら傾斜面は全
て外側方向に向かって傾斜させてあり、その傾斜角は、
ホーンブロワ2に電波が照射されたとき、各傾斜面がそ
の電波を主反射鏡の領域外に反射するような角度となっ
ている。
In FIG. 1, the primary radiator for a Cassegrain antenna of this embodiment comprises a horn body 1 and a horn blower 2, and has a configuration in which a horn blower 2 is provided above the horn body 1. The outer peripheral surface of the horn blower 2 is a polyhedron having eight inclined surfaces. These inclined surfaces are all inclined outward, and the inclination angle is
When the horn blower 2 is irradiated with a radio wave, each of the inclined surfaces has such an angle that the radio wave is reflected outside the area of the main reflecting mirror.

【0009】次に、上述した構成からなる本実施例のカ
セグレンアンテナ用一次放射器の作用について図2を参
照して説明する。同図において、ホーン本体1から発射
した電波は、副反射鏡3に反射して、その大部分は、主
反射鏡4に照射され、一部はホーンブロワ2の外周面に
照射される。ここで、ホーンブロワ2の外周面に照射さ
れた電波すなわち、後の反射波は、ホーンブロワ2外周
面を形成する各傾斜面に反射して主反射鏡4の領域外に
散乱する。
Next, the operation of the primary radiator for a Cassegrain antenna of the present embodiment having the above-described configuration will be described with reference to FIG. In FIG. 1, radio waves emitted from the horn main body 1 are reflected by a sub-reflecting mirror 3, most of which is irradiated on a main reflecting mirror 4, and a part is irradiated on the outer peripheral surface of the horn blower 2. Here, the radio wave applied to the outer peripheral surface of the horn blower 2, that is, the later reflected wave, is reflected on each inclined surface forming the outer peripheral surface of the horn blower 2 and scattered outside the area of the main reflecting mirror 4.

【0010】上述した本実施例のカセグレンアンテナ用
一次放射器によれば、ホーンブロワ2の外周面に照射さ
れた電波を主反射鏡4の領域外に散乱させる構成となっ
ているので、反射波がカセグレンアンテナの放射指向特
性に重畳されない。したがって、反射波によってカセグ
レンアンテナの放射指向特性が劣化することはない。
According to the primary radiator for the Cassegrain antenna of the above-described embodiment, since the radio wave applied to the outer peripheral surface of the horn blower 2 is scattered out of the area of the main reflecting mirror 4, the reflected wave is reduced. It is not superimposed on the radiation directivity characteristics of the Cassegrain antenna. Therefore, the radiation directivity of the Cassegrain antenna does not deteriorate due to the reflected wave.

【0011】なお、本考案のカセグレンアンテナ用一次
放射器は上述した実施例と限定されるものではなく、本
考案の要旨の範囲内における種々変形例を含む。例え
ば、多面体としたホーンブロワの面の数は八面に限定さ
れず適宜の面の数にすることができ、また、面の傾斜角
及び傾斜方向も、反射波が主反射鏡4の領域外に散乱す
るものであれば上記実施例以外の態様であってもよい。
The primary radiator for the Cassegrain antenna of the present invention is not limited to the above-described embodiment, but includes various modifications within the scope of the present invention. For example, the number of faces of the horn blower made into a polyhedron is not limited to eight, and can be set to an appropriate number. Also, the inclination angle and the inclination direction of the faces are such that the reflected wave is out of the area of the main reflecting mirror 4. As long as the light is scattered, an embodiment other than the above embodiment may be used.

【0012】[0012]

【考案の効果】以上、説明したように本考案のカセグレ
ンアンテナ用一次放射器によれば、反射波によるカセグ
レンアンテナの放射指向性の劣化を防止することができ
る。また、一次放射器は従来のホーンブロワの外周面
を、傾斜面を備えた多面体にするだけの簡単な構成とな
っているので、低コストかつ、容易に放射指向性の劣化
を防止できる。
As described above, according to the primary radiator for the Cassegrain antenna of the present invention, it is possible to prevent the radiation directivity of the Cassegrain antenna from being deteriorated due to the reflected wave. Further, since the primary radiator has a simple configuration in which the outer peripheral surface of the conventional horn blower is formed into a polyhedron having an inclined surface, the radiation directivity can be easily reduced at low cost.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本実施例のカセグレンアンテナ用一次放射器を
示すものであり、同図(a)は側面図、同図(b)は正
面図である。
1A and 1B show a primary radiator for a Cassegrain antenna according to the present embodiment, wherein FIG. 1A is a side view and FIG. 1B is a front view.

【図2】図1に示す一次放射器を設けたカセグレンアン
テナを示す側面図である。
FIG. 2 is a side view showing a Cassegrain antenna provided with the primary radiator shown in FIG.

【図3】従来例に係るカセグレンアンテナ用一次放射器
を示すものであり、同図(a)は側面図,同図(b)は
正面図である。
3 shows a primary radiator for a Cassegrain antenna according to a conventional example, wherein FIG. 3 (a) is a side view and FIG. 3 (b) is a front view.

【符号の説明】[Explanation of symbols]

1…ホーン本体 2…ホーンブロワ 3…副反射鏡 4…主反射鏡 1 horn body 2 horn blower 3 auxiliary mirror 4 main mirror

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) H01Q 19/12 - 19/195 H01Q 13/02──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H01Q 19/12-19/195 H01Q 13/02

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of request for utility model registration] 【請求項1】 ホーン本体とホーンブロワを具備するカ
セグレンアンテナ用一次放射器において、 上記ホーンブロワの外周面を、多数の傾斜面を備えた多
面体とし、このホーンブロワに照射された電波を主反射
鏡の領域外に散乱させる構成としたことを特徴とするカ
セグレンアンテナ用一次放射器。
1. A primary radiator for a Cassegrain antenna comprising a horn body and a horn blower, wherein the outer peripheral surface of the horn blower is a polyhedron having a large number of inclined surfaces, and a radio wave applied to the horn blower is transmitted to an area of a main reflecting mirror. A primary radiator for a Cassegrain antenna, wherein the primary radiator is configured to scatter outside.
JP6051592U 1992-08-05 1992-08-05 Primary radiator for Cassegrain antenna Expired - Lifetime JP2580225Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6051592U JP2580225Y2 (en) 1992-08-05 1992-08-05 Primary radiator for Cassegrain antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6051592U JP2580225Y2 (en) 1992-08-05 1992-08-05 Primary radiator for Cassegrain antenna

Publications (2)

Publication Number Publication Date
JPH0619309U JPH0619309U (en) 1994-03-11
JP2580225Y2 true JP2580225Y2 (en) 1998-09-03

Family

ID=13144536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6051592U Expired - Lifetime JP2580225Y2 (en) 1992-08-05 1992-08-05 Primary radiator for Cassegrain antenna

Country Status (1)

Country Link
JP (1) JP2580225Y2 (en)

Also Published As

Publication number Publication date
JPH0619309U (en) 1994-03-11

Similar Documents

Publication Publication Date Title
JPH06197394A (en) Reflection type speaker system
JPH0936634A (en) Feedome, primary radiator and antenna for microwave
JP2580225Y2 (en) Primary radiator for Cassegrain antenna
JPS6351402B2 (en)
JP3077984B2 (en) Double reflector antenna
JP2689537B2 (en) Antenna device
JP3034262B2 (en) Aperture antenna device
JPS6138261Y2 (en)
JPH0349452Y2 (en)
JPH0628818Y2 (en) parabolic antenna
JPH04575Y2 (en)
JP2560819B2 (en) Double reflector antenna
JPS5951769B2 (en) Low sidelobe antenna device
JPS6121852Y2 (en)
JPH0546336Y2 (en)
JPS6183315U (en)
JPH04406B2 (en)
JPS6345903A (en) Reflection mirror antenna
JPH03145806A (en) Microwave band parabolic antenna system
JPH0347764B2 (en)
JPH047123B2 (en)
JPS6018003A (en) Frequency sharing antenna
JPS58175302A (en) Antenna device
JPS6237423U (en)
JPS59169206A (en) Antenna device

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term
FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080619

Year of fee payment: 10