JPH0229033A - Antenna reception system - Google Patents
Antenna reception systemInfo
- Publication number
- JPH0229033A JPH0229033A JP17970788A JP17970788A JPH0229033A JP H0229033 A JPH0229033 A JP H0229033A JP 17970788 A JP17970788 A JP 17970788A JP 17970788 A JP17970788 A JP 17970788A JP H0229033 A JPH0229033 A JP H0229033A
- Authority
- JP
- Japan
- Prior art keywords
- noise amplifier
- low noise
- reception
- level
- power supply
- 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
Landscapes
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明はアンテナ受信システムの低雑音増幅器の電源
制御に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to power control of a low noise amplifier in an antenna receiving system.
［従来の技術］
第３図は従来のアンテナ受信システムの構成を示すブロ
ック図であり、図において、（１）は衛星通信用アンテ
ナ、（２）は送信受信により電波の流れる方向を変える
送受信分波器、（３）は送信用電波を作り出す送信機、
（４）は受信した電波のうち必要な帯域を低雑音で増幅
する低雑音増幅器、（５）は低雑音増幅器（４）で増幅
された受信信号を周波数変換し復調する受信機である。[Prior Art] Fig. 3 is a block diagram showing the configuration of a conventional antenna receiving system. In the figure, (1) is a satellite communication antenna, and (2) is a transmitting/receiving part that changes the direction of radio waves by transmitting and receiving. (3) is a transmitter that produces radio waves for transmission;
(4) is a low-noise amplifier that amplifies the required band of received radio waves with low noise, and (5) is a receiver that converts the frequency and demodulates the received signal amplified by the low-noise amplifier (4).
次に動作について説明する。送信機（３）により作られ
た送信信号は送受信分波器（２）により経路（２ａ）で
衛星通信用アンテナ（１）に与えられる。衛星通信用ア
ンテナ（１）はその送信信号を衛星に向けて放射する。Next, the operation will be explained. A transmission signal produced by a transmitter (3) is applied to a satellite communication antenna (1) by a transmission/reception duplexer (2) via a path (2a). A satellite communication antenna (1) radiates its transmission signal toward a satellite.
衛星からの電波は衛星通信用アンテナ（１）で受信し送
受信分波器（２）により経路（２ｂ）で低雑音増幅器（
４）に送られる。低雑音増幅器（４）はこの受信信号の
うち必要な帯域の信号のみを低雑音で増幅し、受信機（
５）はこの増幅された受信信号を周波数変換し復調する
役割りをもつ。Radio waves from the satellite are received by a satellite communication antenna (1), sent through a transmitter/receiver splitter (2), and sent to a low-noise amplifier (2b).
4). The low-noise amplifier (4) amplifies only the necessary band signals of this received signal with low noise, and transmits them to the receiver (
5) has the role of frequency converting and demodulating this amplified received signal.
［発明が解決しようとする課題］
従来の衛星通信用アンテナは以上の様に構成されており
受信レベルによらず受信波を低雑音増幅器に入力してい
たため、強度の外来干渉波に対し、低雑音増幅器を保護
する機能がなく、低雑音増幅器が耐え得るレベル以上の
外来干渉波か入力された場合には、低雑音増幅器を破壊
するという問題点があった。[Problems to be solved by the invention] Conventional satellite communication antennas were configured as described above, and received waves were input to a low-noise amplifier regardless of the reception level. There is no function to protect the noise amplifier, and if an external interference wave exceeding a level that the low-noise amplifier can withstand is input, the low-noise amplifier will be destroyed.
この発明は−Ｆ記のような問題点を解消するためになさ
れたもので、強度の外来干渉波のある悪条件の中に設置
される場合の衛星通信システムの構成品である低雑音増
幅器を保護する機能をもつ装置を得ることを目的とする
。This invention was made in order to solve the problems mentioned in -F, and is a low-noise amplifier that is a component of a satellite communication system when installed in adverse conditions with strong external interference waves. The purpose is to obtain a device with a protective function.
［護送を解決するための手段］
この発明に係るアンテナ受信システムは、受信レベルを
検出器により検出し受信レベルか低雑音増幅器の許容値
以上の場合あるいは衛星からの受信レベルとしてはあり
得ない高いレベルを受信した時、低雑音増幅器の直流電
源の出力を切るようにしたものである。[Means for solving the convoy problem] The antenna reception system according to the present invention detects the reception level using a detector, and when the reception level is higher than the tolerance of the low noise amplifier or the reception level is unreasonably high as a reception level from a satellite. When the level is received, the output of the DC power supply of the low noise amplifier is cut off.
［作用］
この発明におけるアンテナ受信システムはある定レベル
以上の高い受信波に対し低雑音増幅器の直流電源の出力
を切ることにより、低雑音増幅器が強度のレベルを持つ
干渉波により破壊されることを防止する。[Function] The antenna receiving system according to the present invention prevents the low noise amplifier from being destroyed by interference waves having a strong level by cutting off the output of the DC power supply of the low noise amplifier for high received waves exceeding a certain level. To prevent.
［実施例］ 以下、この発明の一実施例について説明する。[Example] An embodiment of the present invention will be described below.
第１図において、（１）は衛星通信用アンテナ、（２）
は送信、受信により電波に流れる方向を変える送受信分
波器、（３）は送信用電波を作り出す送信機、（４）は
受信した電波のうち必要な帯域を低雑音で増幅する低雑
音増幅器（５）は低雑音増幅器（４）で増幅された受信
信号を周波数変換し復調する受信器、（６）は低雑音増
幅器（４）で増幅された受信信号の受信レベルを検出す
る検出器である。In Figure 1, (1) is a satellite communication antenna, (2)
is a transmitter/receiver splitter that changes the direction of radio waves depending on transmission and reception, (3) is a transmitter that creates radio waves for transmission, and (4) is a low-noise amplifier that amplifies the required band of received radio waves with low noise. 5) is a receiver that frequency converts and demodulates the received signal amplified by the low noise amplifier (4), and (6) is a detector that detects the reception level of the received signal amplified by the low noise amplifier (4). .
次に動作について説明する。送信機（３）により作られ
た送信信号は送受信分波器（２）により経路（２ａ）で
衛星通信用アンテナ（１）に与えられる。衛星通信用ア
ンテナ（１）はその送信信号を衛星に向けて放射する。Next, the operation will be explained. A transmission signal produced by a transmitter (3) is applied to a satellite communication antenna (1) by a transmission/reception duplexer (2) via a path (2a). A satellite communication antenna (1) radiates its transmission signal toward a satellite.
衛星からの電波は衛星通信用アンテナ（１）で受信し、
送受信分波器（２）により経路（２ｂ）で低雑音増幅器
（４）に送られる。低雑音増幅器（４）はこの受信信号
のうち必要な帯域の信号のみを低雑音で増幅し受信機（
５）に送出する。受信機（５）はこの信号を周波数変換
し復調する。検出器（６）は低雑音増幅器（４）の出力
信号の受信レベルを検出し、検出器（６）に設定した受
信レベルの規準値と比較する。そして低雑音増幅器（４
）の出力する受信レベルの方が高い場合は検出器（６）
は低雑音増幅器（４）に対し直流電源ＯＦＦの指令を出
す。低雑音増幅器（４）はこの直流電源ＯＦＦ指令によ
り直流電源をＯＦＦ シ、受信レベルの高い外来干渉波
により破壊されることを防ぐ。Radio waves from the satellite are received by the satellite communication antenna (1),
The signal is sent by the transmitting/receiving duplexer (2) to the low noise amplifier (4) via path (2b). The low-noise amplifier (4) amplifies only the necessary band signals of this received signal with low noise and sends them to the receiver (
5). The receiver (5) converts the frequency of this signal and demodulates it. The detector (6) detects the reception level of the output signal of the low noise amplifier (4) and compares it with a reference value of the reception level set in the detector (6). and a low noise amplifier (4
) is higher, the detector (6)
issues a command to the low noise amplifier (4) to turn off the DC power supply. The low-noise amplifier (4) turns off the DC power supply in response to this DC power supply OFF command and prevents it from being destroyed by external interference waves having a high reception level.
なお、−Ｆ記実施例では低雑音増幅器（４）の直流電源
がＯＦＦすると受信しへルが低雑音増幅器（４）にとっ
て安全な受信レベルとなっても自動復帰できない。第２
図はこの発明の他の実施例を示したもので、自動復帰を
可能にしたものである。In the embodiment described in -F, when the DC power source of the low noise amplifier (4) is turned off, it cannot be automatically restored even if the receiving signal reaches a safe reception level for the low noise amplifier (4). Second
The figure shows another embodiment of the invention, which enables automatic recovery.
第２図において、（１）は衛星通信用アンテナ、（２）
は送信、受信により電波の流れる方向を変える送受信分
波器、（３）は送信用電波を作り出す送信機、（４）は
受信した電波のうち必要な帯域を低雑音で増幅する低雑
音増幅器、（５）は低雑音増幅器（４）で増幅された受
信信号を周波数変換し、復調する受信機、（６）は低雑
音増幅器（４）の出力信号レベルを検出し検出器（６）
に設定した受信レベルの規準値と比較して、低雑音増幅
器（４）の出力する受信レベルが高いならば検出器（６
）は低雑音増幅器（４）に対し、直流電源ＯＦＦの指令
を出すと共に、切替装置（８）に対し切替信号を出す。In Figure 2, (1) is a satellite communication antenna, (2)
is a transmitter/receiver splitter that changes the direction of radio waves by transmitting and receiving, (3) is a transmitter that produces radio waves for transmission, and (4) is a low-noise amplifier that amplifies the required band of received radio waves with low noise. (5) is a receiver that converts the frequency of the received signal amplified by the low noise amplifier (4) and demodulates it, and (6) is a detector that detects the output signal level of the low noise amplifier (4).
If the reception level output from the low-noise amplifier (4) is higher than the reference value of the reception level set at
) issues a command to the low noise amplifier (4) to turn off the DC power supply, and also issues a switching signal to the switching device (8).
切替装置（８）は受信レベルが規準値より低い場合には
経路（８ａ）で送受信分波器（２）からの受信信号を低
雑音増幅器（４）に送出するが、検出器（６）から上記
切替信号が入力された場合には経路（８ａ）に受信信号
を切り替える。増幅器（９）は受信信号を増幅し、その
信号の受信レベルを再び検出器（６）が検出し、低雑音
増幅器（４）にとって支障のない受信レベルとなると、
切替装置（８）に対し切替信号を出し、経路（８ａ）に
受信波を切り替え、低雑音増幅器（４）に対しては直流
電源ＯＮの信号を出し自動復帰する。又、あらかしめ、
高レベルの発振源の位置がわかっている場合には制御装
置（７）にその位置を記憶させ、衛星通信用アンテナ（
１）の向く角度を検出することで、上記と同様に切替装
置（８）及び低雑音増幅器（４）を制御する。When the receiving level is lower than the standard value, the switching device (8) sends the received signal from the transmitting/receiving splitter (2) to the low noise amplifier (4) via the path (8a); When the switching signal is input, the received signal is switched to route (8a). The amplifier (9) amplifies the received signal, and the detector (6) detects the received level of the signal again. When the received level reaches a level that does not cause any problem for the low noise amplifier (4),
A switching signal is issued to the switching device (8) to switch the received wave to the path (8a), and a DC power ON signal is issued to the low noise amplifier (4) for automatic recovery. Also, for the record,
If the location of the high-level oscillation source is known, the location is stored in the control device (7) and the satellite communication antenna (
1), the switching device (8) and the low noise amplifier (4) are controlled in the same way as above.
［発明の効果コ
以上のようにこの発明によれば外来波により高い受信レ
ベルの信号が入る場合には検出器により自動的に低雑音
増幅器の直流電源を切るので低雑音増幅器が破壊される
ことを防ぐ効果がある。[Effects of the Invention] As described above, according to the present invention, when a signal with a high reception level is received by an external wave, the detector automatically turns off the DC power supply of the low-noise amplifier, so that the low-noise amplifier is prevented from being destroyed. It has the effect of preventing
第１図はこの発明の一実施例によるアンテナ受信システ
ムを示すブロック図、第２図はこの発明の他の実施例を
示すブロック図、第３図は従来のアンテナ受信システム
を示すブロック図である。
図において、（１）は衛星通信用アンテナ、（２）は送
受信分波器、（３）は送信器、（４）は低雑音増幅器、
（５）は受信器、（６）は検出器、（７）は制御装置、
（８）は切替装置である。
なお、図中、同一符号は同一 又は相当部分を示す。FIG. 1 is a block diagram showing an antenna receiving system according to one embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional antenna receiving system. . In the figure, (1) is a satellite communication antenna, (2) is a transmitting/receiving duplexer, (3) is a transmitter, (4) is a low noise amplifier,
(5) is a receiver, (6) is a detector, (7) is a control device,
(8) is a switching device. In addition, the same symbols in the figures indicate the same or equivalent parts.
Claims (1)
要な帯域のみ増幅し、受信器で周波数変換後、復調する
衛星通信用のアンテナ受信システムにおいて、受信レベ
ルを検出器で検出し、一定値以上の電波が入力された場
合に自動的に、低雑音増幅器の直流電源を切るようにし
たことを特徴とするアンテナ受信システム。In an antenna reception system for satellite communication, radio waves from a satellite are received by an antenna, only the necessary band is amplified by a low-noise amplifier, and after frequency conversion by a receiver, it is demodulated.The reception level is detected by a detector and set to a constant value. An antenna receiving system characterized in that the direct current power supply of a low noise amplifier is automatically turned off when a radio wave exceeding the above level is input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17970788A JPH0229033A (en) | 1988-07-18 | 1988-07-18 | Antenna reception system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17970788A JPH0229033A (en) | 1988-07-18 | 1988-07-18 | Antenna reception system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0229033A true JPH0229033A (en) | 1990-01-31 |
Family
ID=16070471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17970788A Pending JPH0229033A (en) | 1988-07-18 | 1988-07-18 | Antenna reception system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0229033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5347332A (en) * | 1991-08-02 | 1994-09-13 | Nikon Corporation | Film cartridge driving mechanism of a camera |
-
1988
- 1988-07-18 JP JP17970788A patent/JPH0229033A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5347332A (en) * | 1991-08-02 | 1994-09-13 | Nikon Corporation | Film cartridge driving mechanism of a camera |
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