JPS63132536A - Satellite communication earth station device - Google Patents
Satellite communication earth station deviceInfo
- Publication number
- JPS63132536A JPS63132536A JP28041786A JP28041786A JPS63132536A JP S63132536 A JPS63132536 A JP S63132536A JP 28041786 A JP28041786 A JP 28041786A JP 28041786 A JP28041786 A JP 28041786A JP S63132536 A JPS63132536 A JP S63132536A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- power amplifier
- variable attenuator
- transmitting power
- compensation
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、利得温度特性補償機能及び送信出力調整機
能を有する衛星通信地球局装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a satellite communication earth station device having a gain temperature characteristic compensation function and a transmission output adjustment function.
第３図は従来の衛星通信地球局装置の例を示すブロック
図であり、図において、（１）は衛星、（２）は空中線
装置、（３）は分波器、（４）は低雑音増幅器、＋５１
は受信周波数変換器、（６１はビーコン受信周波数変換
器、（７）は送信電力増幅器、（８）は送信周波数変換
器、αｌは検波器、αυは可変減衰器制御回路、α２は
可変減衰器、０は方向性結合器である。FIG. 3 is a block diagram showing an example of a conventional satellite communication earth station device. In the figure, (1) is a satellite, (2) is an antenna device, (3) is a duplexer, and (4) is a low noise Amplifier, +51
is a reception frequency converter, (61 is a beacon reception frequency converter, (7) is a transmission power amplifier, (8) is a transmission frequency converter, αl is a wave detector, αυ is a variable attenuator control circuit, and α2 is a variable attenuator. , 0 is a directional coupler.
次に動作について説明する。送信電力増幅器（７）で増
幅された送信波の一部が方向性結合器１３で取り出され
、検波雄叫でレベル検出されて、制御回路Ｑｌ）を介し
可変減衰器αａの減衰量を調節する閉ループ制御系を構
成している。送信電力増幅器（７）の利得が温度等によ
シ変化して送信出力レベルが変動すれば、ただちに可変
減衰器Ｃ１２＋の減衰量が変化して送信電力増幅器（７
）の入力レベルを変え、送信出力レベルが常に一定にな
るように自動補償を行なっている。Next, the operation will be explained. A part of the transmission wave amplified by the transmission power amplifier (7) is taken out by the directional coupler 13, its level is detected by a detection signal, and the amount of attenuation of the variable attenuator αa is adjusted via the control circuit Ql). It constitutes a closed loop control system. If the gain of the transmission power amplifier (7) changes due to temperature etc. and the transmission output level fluctuates, the amount of attenuation of the variable attenuator C12+ immediately changes and the transmission power amplifier (7) changes.
), automatic compensation is performed so that the transmitted output level is always constant.
従来の衛星通信地球局は以上のようなシステム構成とな
っているので、降雨減衰等による伝搬損失の変化を補償
するには、送信電力増幅器の利得の温度補償システムと
は別の補償システムを設ケる必要があり、装置が複雑に
なり、高価になるなどの問題点があった。Conventional satellite communications earth stations have the system configuration described above, so in order to compensate for changes in propagation loss due to rain attenuation, etc., a compensation system separate from the temperature compensation system for the gain of the transmitting power amplifier must be set up. However, there were problems such as the need for additional equipment, making the equipment complex and expensive.
この発明は上記のような問題点を解消するためになされ
たもので、電力増幅器の利得の温度特性を補償すると同
時に、降雨減衰等による伝搬損失をも補償する自動送信
出力調整機能を有する送信系をもった衛星通信地球局シ
ステムを得ることを目的とする。This invention was made to solve the above-mentioned problems, and provides a transmission system having an automatic transmission output adjustment function that compensates for the temperature characteristics of the gain of a power amplifier and at the same time compensates for propagation loss due to rain attenuation, etc. The purpose is to obtain a satellite communication earth station system with
この発明に係る衛星通信地球局装置は、電力増幅器の温
度を検出する温度検出器を設けるとともに、受信信号の
受信レベルを検出する検波器を設け、両者の検出出力を
加算した制御信号により可変減衰器の減衰量を制御する
開ループ制御系を構成したものである。The satellite communication earth station device according to the present invention is provided with a temperature detector that detects the temperature of the power amplifier and a wave detector that detects the reception level of the received signal, and has variable attenuation by a control signal that is the sum of the detection outputs of both. This is an open-loop control system that controls the amount of attenuation of the device.
この発明における衛星通信地球局装置においては、電力
増幅器の温度を温度検出器で検出して可変減衰器を制御
することにより、温度変化に対する送信系全体の利得変
化を自動的に補償することができるとともに、検波器に
よシ受信４に号レベルを検出して同じｉ」変減衰器を制
御することにより、降雨等による大気中の伝搬損失の増
減に伴う衛星での受信レベルの変動を自動的に補償する
。In the satellite communication earth station device according to the present invention, by detecting the temperature of the power amplifier with a temperature detector and controlling the variable attenuator, it is possible to automatically compensate for changes in the gain of the entire transmission system due to temperature changes. At the same time, by detecting the signal level at the receiver 4 using a wave detector and controlling the same i'' variable attenuator, fluctuations in the reception level at the satellite due to increases and decreases in atmospheric propagation loss due to rain etc. can be automatically adjusted. to be compensated for.
以下、本発明の実施例を図について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例による衛星通信地球局装置の
ブロック図である。第１図において、（１）〜１８１
、 （１Ｇ −（１３は第３図と同じものを示し、（９
１は温度検出器である。また、第２図は上記実施例によ
る効果を！５２明するためのレベルダイヤグラムである
。FIG. 1 is a block diagram of a satellite communication earth station device according to an embodiment of the present invention. In Figure 1, (1) to 181
, (1G - (13 indicates the same as in Figure 3, (9
1 is a temperature detector. Also, Figure 2 shows the effects of the above embodiment! 52 is a level diagram for clarifying.
第２図において、直線ａ、ｂ、ｃ、ｄはそれぞれ晴天低
温時、晴天高温時、雨天低温時、雨天高温時の送信電力
増幅器（７）の入力及び出力レベルを示している。In FIG. 2, straight lines a, b, c, and d indicate the input and output levels of the transmission power amplifier (7) when the sky is clear and the temperature is low, when the sky is sunny and the temperature is high, when it is rainy and the temperature is low, and when it is rainy and the temperature is high.
次に動作について説明する。送信電力増幅器（７）に付
随して設置されている温度検出器（９１の出力である、
温度に反比例した信号と、ビーコシ受信周波数変換器（
６）の出力を検波器αｌで検波した、ビーコシ受信レベ
ルに比例した信号とが合成され、制御回路Ｉを介して可
変減衰器住りの減衰量を調節する開ループ制御系を構成
している。送信電力増幅器（７１の温度が変化すれば可
変減衰器（１２１の減衰量が変化して送信電力増幅器（
７）の入力レベルを変え、温度が変化しても送信出力レ
ベルは一定となるように自動補償を行なっている。また
、降雨等により大気中での伝搬損失が増加すれば、ビー
コン受信レベルの低下によってそれを検知し、可変減衰
器ｕりの減衰量を低下させて送信電力増幅器（７）の出
力レベルを上げ、衛星における受信レベルが一定となる
ように自動補償を行なっている。Next, the operation will be explained. The output of the temperature detector (91) installed in conjunction with the transmission power amplifier (7) is
A signal that is inversely proportional to temperature and a Bikosi receiving frequency converter (
The output of 6) is detected by the detector αl and is synthesized with a signal proportional to the beacon reception level, forming an open loop control system that adjusts the amount of attenuation of the variable attenuator via the control circuit I. . When the temperature of the transmission power amplifier (71 changes, the attenuation amount of the variable attenuator (121) changes and the transmission power amplifier (
7) is automatically compensated so that the transmission output level remains constant even if the temperature changes. Additionally, if the propagation loss in the atmosphere increases due to rain, etc., this will be detected by a decrease in the beacon reception level, and the attenuation amount of the variable attenuator will be lowered to increase the output level of the transmission power amplifier (7). , automatic compensation is performed so that the reception level at the satellite remains constant.
以上のように、この発明によれば、送信電力増幅器の利
得の温度補償と、降雨減衰等による伝搬損失変動の補償
とを、１台の可変減衰器を用いた開ループ制御系を構成
することにより同時に行なうようにしたので、気温、天
候状態に影響されることなく安定した送受信動作が可能
となると共に、装置が単純かつ安価に構成できる効果が
ある。As described above, according to the present invention, temperature compensation of the gain of the transmission power amplifier and compensation of propagation loss fluctuations due to rain attenuation etc. can be performed by configuring an open loop control system using one variable attenuator. Since both are performed at the same time, stable transmitting and receiving operations are possible without being affected by temperature and weather conditions, and the device can be constructed simply and inexpensively.
第１図はこの発明の一実施例による衛星通信地球局装置
のブロック図、第２図は第１図の動作を説明するための
レベルダイヤグラム、第３図は従来の衛星通信地球局装
置の例を示すブロック図である。
図において、（１）は衛星、（２）は空中線装置、（３
）は分波器、（４）は低雑音増幅器、（５１は受信周波
数変換器、＋６１はビーコン受信周波数変換器、（７）
は送信電力増幅器、（８）は送信周波数変換器、＋９１
は温度検出器、αａは検波器、αυは可変減衰器制御回
路、←２は可変減衰器、（１３は方向性結合器である。
なお、図中同一符号は同一、または相当部分を示す。FIG. 1 is a block diagram of a satellite communication earth station device according to an embodiment of the present invention, FIG. 2 is a level diagram for explaining the operation of FIG. 1, and FIG. 3 is an example of a conventional satellite communication earth station device. FIG. In the figure, (1) is a satellite, (2) is an antenna device, and (3) is a satellite.
) is a duplexer, (4) is a low noise amplifier, (51 is a receiving frequency converter, +61 is a beacon receiving frequency converter, (7)
is the transmission power amplifier, (8) is the transmission frequency converter, +91
is a temperature detector, αa is a wave detector, αυ is a variable attenuator control circuit, ←2 is a variable attenuator, (13 is a directional coupler. In addition, the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
記受信系の受信レベルを検出する検波器と、上記送信系
の送信電力増幅器の温度を検出する温度検出器と、上記
検波器および温度検出器の検出出力に応じて上記送信電
力増幅器への送信入力信号レベルを制御する可変減衰器
とから構成される自動送信出力調整機能を備えたことを
特徴とする衛星通信地球局装置。In a satellite communication earth station equipped with a transmitting system and a receiving system, a wave detector detects the reception level of the receiving system, a temperature detector detects the temperature of a transmission power amplifier of the transmitting system, the detector and the temperature. A satellite communication earth station device comprising an automatic transmission output adjustment function comprising a variable attenuator that controls the transmission input signal level to the transmission power amplifier according to the detection output of the detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28041786A JPS63132536A (en) | 1986-11-24 | 1986-11-24 | Satellite communication earth station device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28041786A JPS63132536A (en) | 1986-11-24 | 1986-11-24 | Satellite communication earth station device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63132536A true JPS63132536A (en) | 1988-06-04 |
Family
ID=17624755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28041786A Pending JPS63132536A (en) | 1986-11-24 | 1986-11-24 | Satellite communication earth station device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63132536A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04170232A (en) * | 1990-11-02 | 1992-06-17 | Nec Corp | Transmission power control system |
| EP0521653A2 (en) * | 1991-07-01 | 1993-01-07 | Raytheon Company | Gain control amplifier |
| US5867769A (en) * | 1995-08-02 | 1999-02-02 | Fujitsu Limited | Transmission power control apparatus in earth station for satellite communication |
-
1986
- 1986-11-24 JP JP28041786A patent/JPS63132536A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04170232A (en) * | 1990-11-02 | 1992-06-17 | Nec Corp | Transmission power control system |
| EP0521653A2 (en) * | 1991-07-01 | 1993-01-07 | Raytheon Company | Gain control amplifier |
| US5867769A (en) * | 1995-08-02 | 1999-02-02 | Fujitsu Limited | Transmission power control apparatus in earth station for satellite communication |
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