JPH02100523A - Reception converter for satellite broadcasting - Google Patents
Reception converter for satellite broadcastingInfo
- Publication number
- JPH02100523A JPH02100523A JP25400388A JP25400388A JPH02100523A JP H02100523 A JPH02100523 A JP H02100523A JP 25400388 A JP25400388 A JP 25400388A JP 25400388 A JP25400388 A JP 25400388A JP H02100523 A JPH02100523 A JP H02100523A
- Authority
- JP
- Japan
- Prior art keywords
- polarized wave
- converter
- reception converter
- cross
- mode filter
- 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.)
- Granted
Links
- 230000005855 radiation Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 6
- 238000005388 cross polarization Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
- Structure Of Receivers (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、円偏波を使用した１２ＧＨｚ帯（１１，７〜
１２．７ＧＨｚ）衛星放送用の受信コンバータ（周波数
変換装置）に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to the 12 GHz band (11,7~
This invention relates to a receiving converter (frequency conversion device) for satellite broadcasting (12.7 GHz).
従来の技術
円偏波マイクロ波信号を放物面反射鏡の焦点に配置した
一次放射器で受信し、その信号を円偏波−直線偏波変換
部で直線偏波に変換して後、導波管−ＭＳＬ（マイクロ
ストリップ線路）変換部によりマイクロストリップ線路
による受信コンバータ回路に導び（場合、従来は第５図
に示すような装置が用いられていた。Conventional technology A circularly polarized microwave signal is received by a primary radiator placed at the focal point of a parabolic reflector, and the signal is converted into a linearly polarized wave by a circularly polarized wave to linearly polarized wave converter. A wave tube-MSL (microstrip line) conversion section leads to a receiving converter circuit using a microstrip line (in this case, a device as shown in FIG. 5 has conventionally been used).
第５図は、受信コンバータ筐体５６の内部に円偏波−直
線偏波変換部５１、導波管−ＭＳＬ変換部５２、モード
・フィルタ５３および交差偏波終端部５４を上記順序に
配置した構造を有している。上記交差偏波終端部５４は
、第６図に示すように円形導波管６１内の交差偏波成分
の電界ベクトルに平行な直径上に配した薄板状電波吸収
体６３により交差偏波成分を吸収していた。FIG. 5 shows that a circularly polarized wave-linearly polarized wave converter 51, a waveguide-MSL converter 52, a mode filter 53, and a cross-polarized wave termination section 54 are arranged in the above order inside a receiving converter housing 56. It has a structure. As shown in FIG. 6, the cross-polarized wave termination section 54 terminates the cross-polarized wave components by a thin plate-shaped radio wave absorber 63 arranged on a diameter parallel to the electric field vector of the cross-polarized wave components in the circular waveguide 61. I was absorbing it.
発明が解決しようとする課題
上述のように、従来の交差偏波終端部５４は、電波吸収
体６３を使用して不要な交差偏波成分を吸収させており
、使用周波数において良好な電波吸収特性を呈するよう
に材質、形状および寸法を決定するための設計が必要で
あったし、材料コストもかさむという課題があった。Problems to be Solved by the Invention As described above, the conventional cross-polarized wave termination section 54 uses the radio wave absorber 63 to absorb unnecessary cross-polarized wave components, and has good radio wave absorption characteristics at the used frequency. A design was required to determine the material, shape, and dimensions so as to exhibit the following characteristics, and there was also the problem of increasing material costs.
本発明は上記従来の課題を解決するものであり、設計が
容易で、材料コストも安価に抑えることのできるコンバ
ータを提供しようとするものである。The present invention solves the above-mentioned conventional problems, and aims to provide a converter that is easy to design and can keep material costs low.
課題を解決するための手段
上述の課題を解決するために、本発明は電波吸収体を使
用した交差偏波終端部をなくし、モード・フィルタ終端
部に電磁ホーンを付加し、不要な交差偏波成分を受信コ
ンバータ筐体外部へ放射し、受信コンバータ回路に戻る
ことを防止することにより受信コンバータとしての交差
偏波識別度を確保するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention eliminates the cross-polarization termination section using a radio wave absorber, adds an electromagnetic horn to the mode filter termination section, and eliminates unnecessary cross-polarization. By radiating the component to the outside of the receiving converter housing and preventing it from returning to the receiving converter circuit, cross-polarization discrimination as a receiving converter is ensured.
作用
かかる本発明の構成によれば、受信コンバータの入力部
から入力された円偏波信号は、円偏波−直線偏波変換部
で直線偏波信号に変換される。変換された直線偏波信号
のうち所望の成分は、導波管−ＭＳＬ変換部に後置され
るモード・フィルタで反射され、導波管−ＭＳＬ変換部
でマイクロストリップ線路モードに変換され受信コンバ
ータ回路へ導かれる。一方、不要な交差偏波成分は、上
記モード・フィルタを通過し、モード・フィルタの終端
部に付加接続される電磁ホーンにより、上記受信コンバ
ータの筐体外部へ放射される。According to the configuration of the present invention, a circularly polarized wave signal inputted from the input section of the receiving converter is converted into a linearly polarized wave signal by the circularly polarized wave-linearly polarized wave converter. A desired component of the converted linearly polarized signal is reflected by a mode filter placed after the waveguide-MSL converter, converted into a microstrip line mode by the waveguide-MSL converter, and then sent to the receiving converter. guided to the circuit. On the other hand, unnecessary cross-polarized components pass through the mode filter and are radiated outside the housing of the receiving converter by an electromagnetic horn additionally connected to the terminal end of the mode filter.
実施例
以下、本発明の一実施例について、図面に基づいて説明
する。第１図ａ、ｂは、本発明の一実施例を示す。本実
施例は、円偏波−直線偏波変換部１１、導波管−ＭＳＬ
変換部１２、モード・フィルタ１３、電磁ホーン１４と
、受信コンバータ回路筐体１６内に図のように配置され
、導波管−ＭＳＬ変換部１２に受信コンバータ回路部１
５が接続されている。EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. Figures 1a and 1b show an embodiment of the invention. In this embodiment, a circularly polarized wave-linearly polarized wave converter 11, a waveguide-MSL
The converter 12 , the mode filter 13 , the electromagnetic horn 14 , and the receiver converter circuit casing 16 are arranged as shown in the figure, and the receiver converter circuit 1 is connected to the waveguide-MSL converter 12 .
5 is connected.
筐体１６において、電磁ホーン１４の放射開口面に相当
する部分１９は、電磁ホーン１４の放射の妨げとならな
いように開口が設けられている。In the housing 16, a portion 19 corresponding to the radiation opening surface of the electromagnetic horn 14 is provided with an opening so as not to interfere with the radiation of the electromagnetic horn 14.
円偏波−直線偏波変換部１１は、第２図ａ、ｂに示した
ように直線偏波のＴ Ｅ ＋ ｒモードの電界ベクトル
と４５°の角度をなして円形導波管２１の直径上に挿入
された電界ベクトルが板面に平行なＴＥ、。As shown in FIGS. 2a and 2b, the circularly polarized wave-linearly polarized wave converter 11 forms an angle of 45° with the electric field vector of the T E + r mode of the linearly polarized wave, and the diameter of the circular waveguide 21. TE, where the electric field vector inserted above is parallel to the plate surface.
モードと垂直なＴＥ、、モードとの位相差がＡ波長のＬ
’［体位組板２２によって構成され、これによって受信
された円偏波信号が直線偏波信号に変換される。変換さ
れた直線偏波信号のうち所望の成分２３は、第３図に示
したような導波管−ＭＳＬ変換部１２によって円形導波
管ＴＥ、、モードからマイクロストリップ線路モードに
変換され、受信コンバータ回路１５へ導かれて、低雑音
増幅と周波数変換が施され、出力コネクタ１８から出力
される。TE perpendicular to the mode, the phase difference with the mode is L of wavelength A
'[It is constituted by the body positioning plate 22, which converts the received circularly polarized signal into a linearly polarized signal. A desired component 23 of the converted linearly polarized signal is converted from the circular waveguide TE mode to the microstrip line mode by the waveguide-MSL converter 12 as shown in FIG. 3, and is then received. The signal is guided to the converter circuit 15, subjected to low-noise amplification and frequency conversion, and outputted from the output connector 18.
一方、円偏波−直線偏波変換部１１で変換された直線偏
波信号のうら不要な偏波成分である交差偏波成分２４は
、モード・フィルタ１３を透過し、モード・フィルタ終
端部に付加接続された電磁ホーン１４により、受信コン
バータ筐体１６外部へ放射され、受信コンバータ筐体１
６内へ戻って受信コンバータの交差偏波識別度を劣化さ
せることはない。On the other hand, the cross-polarized wave component 24, which is an unnecessary polarized wave component of the linearly polarized wave signal converted by the circularly polarized wave-linear polarized wave converter 11, passes through the mode filter 13 and reaches the end of the mode filter. The additionally connected electromagnetic horn 14 radiates the radiation to the outside of the receiving converter housing 16, and the receiving converter housing 1
6 and degrade the cross-polarization discrimination of the receiving converter.
モード・フィルタ１３としては、第４図のような線格子
状の金属薄板が用いられ、電界ベクトルが線格子と平行
な所望の偏波成分２３は、上記金属薄板で反射されて、
導波管−ＭＳＬ変換で変換され、電界ベクトルが線格子
と垂直な交差偏波成分２４は透過し、モード・フィルタ
１３に付加接続された電磁ホーン１４へ導かれる。As the mode filter 13, a thin metal plate in the shape of a line lattice as shown in FIG. 4 is used, and a desired polarized wave component 23 whose electric field vector is parallel to the line lattice is reflected by the thin metal plate.
A cross-polarized wave component 24, which is converted by the waveguide-MSL conversion and whose electric field vector is perpendicular to the line grating, is transmitted and guided to an electromagnetic horn 14 additionally connected to a mode filter 13.
なお、第３図に、導波管−ＭＳＬ変換部１２の構造を示
す。受信コンバータ回路１５と電磁気的に結合される導
波管プローブｎは、所望の偏波成分のコミ界ベクトル２
３と平行で、不要な交差偏波成分の電界ベクトル２４と
垂直な関係にある。Note that FIG. 3 shows the structure of the waveguide-MSL converter 12. The waveguide probe n electromagnetically coupled to the receiving converter circuit 15 is configured to generate a commi field vector 2 of a desired polarization component.
3 and perpendicular to the electric field vector 24 of the unnecessary cross-polarized component.
発明の効果
以上のように、本発明によれば、上述のように、交差偏
波成分を電磁ホーンで受信コンバータ筐体外の自由空間
に放射してしまうので、従来用いられていた交差偏波吸
収体が不必要になり、設計の容易さ、材料コストの低減
等の工業的価値大なるものがある。Effects of the Invention As described above, according to the present invention, as described above, the cross-polarized wave component is radiated into the free space outside the receiving converter housing by the electromagnetic horn, so that the cross-polarized wave absorption that was conventionally used can be avoided. It has great industrial value, such as eliminating the need for a body, simplifying design, and reducing material costs.
第１図ａ、ｂは、本発明の一実施例における衛星放送用
受信コンバータの正面図、側面図、第２図（ａ）、 （
ｂ）は、同コンバータに使用される円偏波−直線偏波変
換部の正面図および側面図、第３図は、同コンバータに
使用される導波管−ＭＳＬ変換部の正面図、第４図（ａ
）、 （ｂ）は、同コンバータに使用されるモード・フ
ィルタの正面図および側面図、第５図は、従来例におけ
る衛星放送受信コンバータの正面図、第６図（ａ）、
０））は、同コンバータに使用される交差偏波終端部の
正面図および側面図である。
１１・・・・・・円偏波−直線偏波変換部、１２・・・
・・・導波管−ＭＳＬ変換部、１３・・・・・・モード
・フィルタ、１４・・・・・・電磁ホーン、１５・・・
・・・受信コンバータ回路。
代理人の氏名 弁理士 粟野重孝 はか１名￥＆１図
Ｉｆ−・−日偏液一直線偏ｌ麦袂鐸
ｌｚ・・−導液管−１”’ＩＳ１変換部変換部−３−−
−モードＪレク
！４− 電磁ホーン
１５− 受イ容コンハ゛−ｙ回語
／４− 受イ占ゴンバータ實俸
／７−−−−法玖射器
１８− エカコ半タグ
Ｉ９−開口部
びり
（ｂ）
第
図
（ａ−少
（１＞）
第５図
第
図
窮 ６ 図
（ａ−９
（ｂ）
／２’FIGS. 1a and 1b are a front view and a side view of a reception converter for satellite broadcasting according to an embodiment of the present invention, and FIGS.
b) is a front view and a side view of the circularly polarized wave-linearly polarized wave converter used in the converter, FIG. 3 is a front view of the waveguide-MSL converter used in the converter, and FIG. Figure (a
), (b) are front and side views of a mode filter used in the converter, FIG. 5 is a front view of a conventional satellite broadcast reception converter, and FIG. 6 (a),
0)) are a front view and a side view of a cross-polarized wave termination used in the same converter. 11...Circular polarization-linear polarization conversion section, 12...
...Waveguide-MSL conversion unit, 13...Mode filter, 14...Electromagnetic horn, 15...
...Reception converter circuit. Name of agent: Patent attorney Shigetaka Awano Haka 1 person ¥ & 1 figure If---Japanese polar liquid straight line polarized l Mugishitaku lz...-Liquid conduit-1'''IS1 conversion part Conversion part-3--
-Mode J Rec! 4- Electromagnetic horn 15- Receiving converter / 4- Receiving controller actual price / 7----- Actual projector 18- Ekako half tag I9- Opening hole (b) Fig. (a - Small (1>) Figure 5 Figure 6 Figure (a-9 (b) /2'
Claims (1)
を前記受信コンバータ筺体内部で導波管−マイクロスト
リップ線路変換部に前置し、かつ上記導波管−マイクロ
ストリップ線路変換部に、この導波管−マイクロストリ
ップ線路変換部で変換される直線偏波成分と直交する交
差偏波成分を透過させるモード・フィルタを後置し、上
記交差偏波成分を上記モード・フィルタ終端部から上記
受信コンバータ筐体外部へ放射させる電磁ホーンを付加
したことを特徴とする衛星放送用受信コンバータ。A circularly polarized wave-to-linearly polarized wave converter formed by a circular waveguide is placed in front of the waveguide-to-microstrip line converter inside the receiving converter housing, and a circularly polarized wave-to-linearly polarized wave converter formed by a circular waveguide is disposed in front of the waveguide-to-microstrip line converter. , a mode filter that transmits a cross-polarized wave component orthogonal to the linearly polarized wave component converted by the waveguide-to-microstrip line converter is placed downstream, and the cross-polarized wave component is transmitted from the end of the mode filter. A reception converter for satellite broadcasting, characterized in that an electromagnetic horn is added that emits radiation to the outside of the reception converter housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25400388A JP2699462B2 (en) | 1988-10-07 | 1988-10-07 | Satellite broadcast receiving converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25400388A JP2699462B2 (en) | 1988-10-07 | 1988-10-07 | Satellite broadcast receiving converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02100523A true JPH02100523A (en) | 1990-04-12 |
| JP2699462B2 JP2699462B2 (en) | 1998-01-19 |
Family
ID=17258910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25400388A Expired - Lifetime JP2699462B2 (en) | 1988-10-07 | 1988-10-07 | Satellite broadcast receiving converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2699462B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115601A (en) * | 1990-08-31 | 1992-04-16 | Matsushita Electric Ind Co Ltd | Converter for satellite broadcast receiver |
| WO2007123337A1 (en) * | 2006-04-26 | 2007-11-01 | Sucheol Seo | The twin-jige type portable bookrest |
-
1988
- 1988-10-07 JP JP25400388A patent/JP2699462B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115601A (en) * | 1990-08-31 | 1992-04-16 | Matsushita Electric Ind Co Ltd | Converter for satellite broadcast receiver |
| WO2007123337A1 (en) * | 2006-04-26 | 2007-11-01 | Sucheol Seo | The twin-jige type portable bookrest |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2699462B2 (en) | 1998-01-19 |
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