JPH0783211B2 - Dual-frequency primary radiator - Google Patents
Dual-frequency primary radiatorInfo
- Publication number
- JPH0783211B2 JPH0783211B2 JP61183598A JP18359886A JPH0783211B2 JP H0783211 B2 JPH0783211 B2 JP H0783211B2 JP 61183598 A JP61183598 A JP 61183598A JP 18359886 A JP18359886 A JP 18359886A JP H0783211 B2 JPH0783211 B2 JP H0783211B2
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- primary radiator
- coaxial
- conductor
- radiator
- 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 - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
- Aerials With Secondary Devices (AREA)
- Waveguide Aerials (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、周波数の離れた２周波数帯の互いに直交する
偏移関係にある伝播を共用するパラボラアンテナの一次
放射器に関する。Description: TECHNICAL FIELD The present invention relates to a primary radiator of a parabolic antenna which shares two orthogonally spaced shift propagations of two frequency bands apart from each other.
［従来の技術］ 従来より、周波数の離れた２周波数帯で共用するパラボ
ラアンテナの一次放射器として、第４図に示すようなも
のがある。なお、以下の説明において、互いに直交する
偏移関係にある２周波帯の電波のうち、低い周波数の電
波をf1,高い周波数の電波をf2とする。[Prior Art] Conventionally, as a primary radiator of a parabolic antenna shared by two frequency bands separated in frequency, there is one as shown in FIG. In the following description, among the two frequency bands of radio waves that are orthogonal to each other, the low frequency radio waves are f 1 and the high frequency radio waves are f 2 .
第４図において、８はf1用の一次放射器、９はf2用の一
次放射器、３はf1用の一次放射器８の結合孔11を介して
側面から結合する分岐導波管、10はf2用の一次放射器９
に結合孔12を介して側面から結合する分岐導波管、13は
f1用の一次放射器８とf2用の一次放射器９とに共用され
る開口面フランジである。In FIG. 4, 8 is a primary radiator for f 1 , 9 is a primary radiator for f 2 , and 3 is a branched waveguide that is coupled from the side through a coupling hole 11 of the primary radiator 8 for f 1 . , 10 are primary radiators 9 for f 2
A branch waveguide that is coupled from the side through a coupling hole 12,
It is an opening face flange shared by the primary radiator 8 for f 1 and the primary radiator 9 for f 2 .
いま、f1,f2ともに送信波とすると、分岐導波管３を伝
送してきたf1は結合孔11を介して一次放射器８に結合
し、放射される。同様に分岐導波管10を伝送してきたf2
は、結合孔12を介して一次放射器９に結合し、放射され
る。Assuming that f 1, f 2 both transmission wave, f 1 that has transmitted the branch waveguide 3 through the coupling hole 11 is coupled to the primary radiator 8, is emitted. Similarly, f 2 transmitted through the branch waveguide 10
Is coupled to the primary radiator 9 through the coupling hole 12 and is radiated.
ここで、パラボラ反射鏡の焦点には通常f2用の一次放射
器９を設置し、f1用の一次放射器８は焦点から離れた位
置に設置される。Here, the primary radiator 9 for f 2 is usually installed at the focal point of the parabolic reflector, and the primary radiator 8 for f 1 is installed at a position away from the focal point.
［解決すべき問題点］ 上述したように従来の方法によれば、f1,f2に対し、そ
れぞれ専用の一次放射器8,9を並列に使用するため、パ
ラボラアンテナの一次放射器として使用する場合、f1用
の一次放射器８と、f2用の一次放射器９とを、それぞれ
同時にパラボラ反射鏡焦点に設置させることができず、
一般に、f2用の一次放射器９を反射鏡焦点に設置してい
た。したがって、f1に対しては離焦点となるので、利得
の低下や、アンテナビームの偏移を生じるという欠点が
あった。[Problems to be Solved] As described above, according to the conventional method, since dedicated primary radiators 8 and 9 are used in parallel for f 1 and f 2 , respectively, they are used as primary radiators of the parabolic antenna. In that case, the primary radiator 8 for f 1 and the primary radiator 9 for f 2 cannot be simultaneously installed at the focal point of the parabolic reflector,
Generally, the primary radiator 9 for f 2 was placed at the reflector focus. Therefore, the focal point is defocused with respect to f 1 , and there are drawbacks that the gain is lowered and the antenna beam is deviated.
そこで、本発明の目的とするところは、２周波にわたっ
て、各々独立に開口能率とサイドローブ特性の最適化を
図ったパラボラアンテナを実現する一次放射器を提供す
ることにある。Therefore, an object of the present invention is to provide a primary radiator that realizes a parabolic antenna in which the aperture efficiency and the side lobe characteristics are independently optimized over two frequencies.
［問題点の解決手段］ 本発明は、中心導体と外部導体とからなる同軸導波管で
形成され、該同軸導波管を低域周波数専用放射器とし、
前記中心導体を中空状として高域周波数専用放射器とし
たパラボラアンテナに用いられる２周波共用一次放射器
であって、前記同軸導波管の入射端側に配置された分岐
導波管と、この分岐導波管と前記同軸導波管の間に配置
されたステップ変換部と、このステップ変換部と前記中
心導体との間に配置され、前記中心導体の一端を支持す
るモードフィルタとしての金属平板と、前記外部導体を
貫通し前記中心導体の側部に接合して、前記中心導体を
支持する同軸線路と、この同軸線路内に設けられ一端が
前記中心導体の内部に到達するプローブとを具備した構
成としてある。[Means for Solving Problems] The present invention is formed by a coaxial waveguide including a center conductor and an outer conductor, and the coaxial waveguide is used as a low frequency exclusive radiator.
A dual-wavelength primary radiator used for a parabolic antenna in which the central conductor is hollow and has a radiator for exclusive use of a high frequency band, and a branching waveguide disposed on an incident end side of the coaxial waveguide, A step conversion part arranged between the branch waveguide and the coaxial waveguide, and a metal flat plate as a mode filter arranged between the step conversion part and the center conductor and supporting one end of the center conductor. A coaxial line that penetrates the outer conductor and is joined to a side portion of the center conductor to support the center conductor, and a probe that is provided in the coaxial line and has one end reaching the inside of the center conductor. There is a configuration.
［実施例］ 次に、本発明の一実施例について図面を参照して説明す
る。[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例の断面図、第２図は第１図中
のＡ−Ａ矢視図、第３図は一次放射器におけるモードフ
ィルタの効果をf1における電界分布で示したものであ
る。FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. 3 shows the effect of a mode filter in a primary radiator by the electric field distribution at f 1 . It is a thing.
第１図において、１は同軸導波管であり、外部導体1Aと
中心導体1Bとからなっている。この同軸導波管１は、f1
用の導波管として使用する。また、前記中心導体1Bは、
中空筒状に形成されて円形導波管を構成し、これをf2用
の導波管として使用する。したがって、以下において
は、中心導体1Bを、f2用導波管1Bとも称する。In FIG. 1, 1 is a coaxial waveguide, which is composed of an outer conductor 1A and a center conductor 1B. This coaxial waveguide 1 has f 1
It is used as a waveguide. Further, the central conductor 1B,
It is formed into a hollow cylinder to form a circular waveguide, which is used as a waveguide for f 2 . Therefore, in the following, the central conductor 1B is also referred to as the f 2 waveguide 1B.
３は前記同軸導波管１の入射端側に配置されたf1用の分
岐導波管、４は前記同軸導波管１と分岐導波管３の整合
用ステップ変換部である。Reference numeral 3 is a branch waveguide for f 1 arranged on the incident end side of the coaxial waveguide 1, and 4 is a step conversion unit for matching the coaxial waveguide 1 and the branch waveguide 3.
５は前記f2用導波管へf2を励振するための同軸線路であ
り、外部導体1Aを貫通しf2用導波管1Bの側部に接合し、
f2用導波管1Bを支持している。この同軸線路５内には第
２図に示すように一端が前記f2用導波管1B内に到達する
プローブ６を支持している。5 is a coaxial line for exciting the f 2 to the f 2 waveguide, joined on the side of the through the outer conductor 1A f 2 Yoshirubeha tube 1B,
It supports the waveguide 1B for f 2 . In this coaxial line 5, as shown in FIG. 2, one end supports a probe 6 which reaches the inside of the f 2 waveguide 1B.
７は同軸導波管１内におけるf1に対する励振用モードフ
ィルタと、f2用導波管２の支持とを兼ねる金属平板であ
る。Reference numeral 7 is a metal flat plate that serves both as an excitation mode filter for f 1 in the coaxial waveguide 1 and as a support for the f 2 waveguide 2.
このような２周波共用一次放射器にあっては、f1は分岐
導波管３を通り、長さ約λg/4のステップ変換部４を介
し、モードフィルタとしての金属平板７でTE11モードで
同軸導波管１を励振し送出される。In such a dual-frequency primary radiator, f 1 passes through the branch waveguide 3 and the step conversion unit 4 having a length of about λg / 4, and the metal flat plate 7 as a mode filter TE 11 mode. Then, the coaxial waveguide 1 is excited and transmitted.
ここで、金属平板７は、第３図（Ａ）に示す通り、分岐
導波管３より円形導波管部に励振されたTE11モードが、
次段の同軸導波管部１で、整合しTE11モードを励振させ
る励振用モードフィルタとしての効果を有している。Here, in the metal flat plate 7, as shown in FIG. 3 (A), the TE 11 mode excited by the branch waveguide 3 into the circular waveguide portion is
The coaxial waveguide portion 1 at the next stage has an effect as an excitation mode filter that matches and excites the TE 11 mode.
すなわち、金属平板７が無い場合、第３図（Ｂ）に示す
ように円形導波管内のTE11モードは、次の同軸導波管部
１でTEMモードと、TE11モードの混成モードに変換され
てしまう。そこで、TEMモード波を除去するために、モ
ードフィルタとしての金属平板７を入射TE11モード波の
電界に垂直な面内に挿入している。That is, when the metal flat plate 7 is not provided, the TE 11 mode in the circular waveguide is converted into a mixed mode of the TEM mode and the TE 11 mode in the next coaxial waveguide section 1 as shown in FIG. 3 (B). Will be done. Therefore, in order to remove the TEM mode wave, a metal flat plate 7 as a mode filter is inserted in a plane perpendicular to the electric field of the incident TE 11 mode wave.
次にf2は、同軸線路５を通りプローブ６を介してf2用導
波管1BをTE11モードで励振し、送出する。プローブ６と
短絡面までの距離ｌを最適に選び整合をとっている。こ
こで、f2用導波管1Bは、f2に対し放射パターン等を考慮
し、最適な寸法に選んでいる。Next, f 2 passes through the coaxial line 5 and the probe 6 to excite the f 2 waveguide 1B in the TE 11 mode and send it out. The distance 1 between the probe 6 and the short-circuited surface is optimally selected and matched. Here, the waveguide 2B for f 2 is selected to have an optimum size in consideration of the radiation pattern and the like for f 2 .
ここで、上記構成の２周波共用一次放射器にあっては、
同軸導波管１を低域周波数専用放射器とし、該同軸導波
管１の中心導体1Bを中空状としてこれを高域周波数用専
用放射器としているため、f1,f2用の導波管を同一中心
上に配置できる。したがって、f1,f2用の各一次放射器
を、パラボラ反射鏡焦点に同時に設置でき、高能率でビ
ーム偏移のないパラボラアンテナの実現に寄与できる。Here, in the dual-frequency primary radiator having the above configuration,
Since the coaxial waveguide 1 is used as a low-frequency dedicated radiator, and the central conductor 1B of the coaxial waveguide 1 is hollow to be used as a high-frequency dedicated radiator, the waveguides for f 1 and f 2 are guided. The tubes can be centered. Therefore, the primary radiators for f 1 and f 2 can be installed at the focal point of the parabolic reflector at the same time, which contributes to the realization of a parabolic antenna with high efficiency and no beam deviation.
また、金属平板７を設けているため、入射モード波以外
のモード波を除去でき、しかも、この金属平板７と同軸
線路５を中心導体1Bの支持部材として兼用することがで
き、部材点数を減少することができる。Further, since the metal flat plate 7 is provided, mode waves other than the incident mode wave can be removed, and moreover, the metal flat plate 7 and the coaxial line 5 can also be used as a supporting member for the central conductor 1B, and the number of members can be reduced. can do.
なお、本発明は上記実施例に限定されるものではなく、
本発明の要旨の範囲内で種々の変形実施が可能である。
例えば、f1用の同軸導波管1,f2用の導波管1Bは図中円形
導波管で示したが、矩形あるいは方形導波管においても
同様の効果が得られる。The present invention is not limited to the above embodiment,
Various modifications can be made within the scope of the present invention.
For example, although the coaxial waveguide 1 for f 1 and the waveguide 1B for f 2 are shown as circular waveguides in the figure, similar effects can be obtained with rectangular or rectangular waveguides.
［発明の効果］ 以上説明したように、本発明によれば、２周波数帯で共
用するパラボラアンテナの一次放射器において、f1,f2
用の導波管を同一中心上に配置できるので、２周波数に
わたって高能率で、ビーム偏位のないパラボラアンテナ
を実現できるという効果がある。[Effects of the Invention] As described above, according to the present invention, in the primary radiator of the parabolic antenna shared in two frequency bands, f 1 , f 2
Since the waveguides for the antenna can be arranged on the same center, there is an effect that a parabolic antenna without beam deviation can be realized with high efficiency over two frequencies.
また、モードフィルタとしての金属平板と、f2を励振す
るための同軸線路によって、f2用導波管（中心導体）を
支持しているので、構成がきわめて簡単になる効果があ
る。Moreover, the flat metal plate as mode filter, by a coaxial line for exciting the f 2, since the support f 2 Yoshirubeha tube (center conductor), the effect of the configuration is very simple.
第１図は本発明の一実施例の２周波共用一次放射器の概
略斜視図、第２図は第１図中のＡ−Ａ矢視図、第３図
（Ａ），（Ｂ）はそれぞれ金属平板の有る場合と無い場
合の各部の電界分布を示す説明図、第４図は従来の２周
波共用一次放射器の概略斜視図である。 1:同軸導波管（高域周波数専用放射器） 1B:中心導体（低域周波数専用放射器） 7:金属平板FIG. 1 is a schematic perspective view of a dual-frequency primary radiator according to an embodiment of the present invention, FIG. 2 is a view on arrow AA in FIG. 1, and FIGS. 3 (A) and 3 (B) are respectively. FIG. 4 is an explanatory view showing the electric field distribution of each part with and without a metal flat plate, and FIG. 4 is a schematic perspective view of a conventional dual-frequency primary radiator. 1: Coaxial waveguide (high frequency dedicated radiator) 1B: Center conductor (low frequency dedicated radiator) 7: Metal plate
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭63−33206（ＪＰ，Ｕ) 特公 昭52−19752（ＪＰ，Ｂ２) 実公 昭39−14409（ＪＰ，Ｙ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 63-33206 (JP, U) Japanese Patent Sho 52-19752 (JP, B2) Actual Sho 39-14409 (JP, Y1)
Claims (1)
で形成され、該同軸導波管を低域周波数専用放射器と
し、前記中心導体を中空状として高域周波数専用放射器
としたパラボラアンテナに用いられる２周波共用一次放
射器であって、 前記同軸導波管の入射端側に配置された分岐導波管と、 この分岐導波管と前記同軸導波管の間に配置されたステ
ップ変換部と、 このステップ変換部と前記中心導体との間に配置され、
前記中心導体の一端を支持するモードフィルタとしての
金属平板と、 前記外部導体を貫通し前記中心導体の側部に接合して、
前記中心導体を支持する同軸線路と、 この同軸線路内に設けられ一端が前記中心導体の内部に
到達するプローブとを具備したことを特徴とする２周波
共用一次放射器。1. A coaxial waveguide comprising a center conductor and an outer conductor, wherein the coaxial waveguide is used as a low frequency band dedicated radiator, and the center conductor is hollow to be used as a high frequency band dedicated radiator. A dual-frequency primary radiator used for a parabolic antenna, comprising: a branch waveguide arranged on an incident end side of the coaxial waveguide; and a branch waveguide arranged between the branch waveguide and the coaxial waveguide. And a step conversion part, which is arranged between the step conversion part and the central conductor,
A metal flat plate as a mode filter that supports one end of the center conductor, and penetrates the outer conductor and is joined to a side portion of the center conductor,
A dual-frequency primary radiator, comprising: a coaxial line that supports the central conductor; and a probe that is provided in the coaxial line and has one end reaching the inside of the central conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61183598A JPH0783211B2 (en) | 1986-08-05 | 1986-08-05 | Dual-frequency primary radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61183598A JPH0783211B2 (en) | 1986-08-05 | 1986-08-05 | Dual-frequency primary radiator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6339206A JPS6339206A (en) | 1988-02-19 |
| JPH0783211B2 true JPH0783211B2 (en) | 1995-09-06 |
Family
ID=16138613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61183598A Expired - Fee Related JPH0783211B2 (en) | 1986-08-05 | 1986-08-05 | Dual-frequency primary radiator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0783211B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3388694B2 (en) * | 1997-09-01 | 2003-03-24 | シャープ株式会社 | Dual radiator primary radiator |
| US7110091B2 (en) | 2003-07-23 | 2006-09-19 | Asml Netherlands B.V. | Lithographic apparatus, device manufacturing method, and device manufactured thereby |
| DE102012209767A1 (en) * | 2012-06-12 | 2013-12-12 | Ellergon Antriebstechnik Gesellschaft M.B.H. | Torsionally elastic damper or coupling with a flange for connection to a flange of another component |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847417B2 (en) * | 1975-08-08 | 1983-10-22 | 旭化成株式会社 | polyoxymethylene composition |
| JPS6148203A (en) * | 1984-08-15 | 1986-03-08 | Nippon Telegr & Teleph Corp <Ntt> | Microwave power distributor |
-
1986
- 1986-08-05 JP JP61183598A patent/JPH0783211B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6339206A (en) | 1988-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |