JPH04189036A - Satellite broadcast transmission/reception system - Google Patents
Satellite broadcast transmission/reception systemInfo
- Publication number
- JPH04189036A JPH04189036A JP31896990A JP31896990A JPH04189036A JP H04189036 A JPH04189036 A JP H04189036A JP 31896990 A JP31896990 A JP 31896990A JP 31896990 A JP31896990 A JP 31896990A JP H04189036 A JPH04189036 A JP H04189036A
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- signal
- frequency
- converter
- signals
- 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 title claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、複数の衛星からの放送信号を受信して伝送す
る衛星放送受信方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a satellite broadcast receiving system for receiving and transmitting broadcast signals from a plurality of satellites.
［従来の技術］
従来一般の衛星放送受信においては、１つの衛星に対し
て１つの受信アンテナを設置し、受信アンテナに装着さ
れた第１中間周波数変換器（コンバータ）の出力を伝送
する１本の伝送ケーブルで構成する方式が採られていた
。ところで、近年はわが国においても複数の通信衛星を
使用して衛星放送を行なうこととなり、従来の受信方式
では受信する衛星放送の数に対応した伝送ケーブルを取
り扱うこととなる。[Prior Art] Conventionally, in general satellite broadcast reception, one receiving antenna is installed for one satellite, and one antenna is used to transmit the output of a first intermediate frequency converter (converter) attached to the receiving antenna. A system consisting of transmission cables was adopted. Incidentally, in recent years, satellite broadcasting has been carried out using a plurality of communication satellites in Japan as well, and the conventional reception system has to deal with transmission cables corresponding to the number of satellite broadcasts to be received.
第５図は上記従来の受信方式により２個の衛星からの衛
星放送を受信する場合の機器構成を例示するものである
。同図でｌａ、ｌｂはそれぞれの衛星Ａ、Ｂに対向設置
されたアンテナであり、２ａ。FIG. 5 shows an example of the equipment configuration when receiving satellite broadcasts from two satellites using the conventional reception method described above. In the figure, la and lb are antennas installed opposite to the respective satellites A and B, and 2a.
２ｂはアンテナｌａ、 ｌｂて受信した信号を予め特定
される一定の中間周波数に変換する第１周波数変換器（
コンバータ）である。第１周波数変換器２ａ。2b is a first frequency converter (
converter). First frequency converter 2a.
２ｂの出力する信号は伝送ケーブル３ａ、 ３ｂにより
伝送され、受信機５に送られる。このように、伝送ケー
ブルはアンテナ及び第１周波数変換器に対応する数（こ
の場合には３ａ、 ３ｂの２本）たけ必要となる。The signal outputted from 2b is transmitted by transmission cables 3a and 3b and sent to receiver 5. In this way, the number of transmission cables corresponding to the antenna and the first frequency converter (in this case, two cables 3a and 3b) is required.
［発明か解決しようとする課題］
上記のように複数の衛星放送に対しては伝送ケーブルも
その数たけ必要となるため、配線工事か複雑となり、特
に既設構造物での伝送ケーブルの増設工事は困難となる
。[Problem to be solved by the invention] As mentioned above, multiple transmission cables are required for multiple satellite broadcasts, which makes wiring work complicated, especially when installing additional transmission cables in existing structures. It becomes difficult.
また、上記第１中間周波数変換器の局部発振周波数を変
更して変換中間周波数を適切に割り当て、１本の伝送ケ
ーブルにより同様の受信方式を行なうことも技術的には
可能であるが、局部発振周波数帯は電波法により他の通
信にも割り当てられており、受信機の仕様を統一する上
で予め定められていると共に、任意に使用することは漏
洩により他の通信に妨害を与える恐れもあるため、実用
できない。Furthermore, it is technically possible to change the local oscillation frequency of the first intermediate frequency converter to appropriately allocate the converted intermediate frequency and perform the same reception method using a single transmission cable; Frequency bands are also allocated to other communications under the Radio Law, and are determined in advance to unify the specifications of receivers, and using them arbitrarily may cause leaks and interfere with other communications. Therefore, it is not practical.
第６図（１）及び第６図（２）はわが国の民間通信衛星
であるＪＣ５ＡＴ、５ＵＰＥＲＢＩＲＤの中継機の周波
数配列を示すものである。これら２つの通信衛星の周波
数配列の実線で数字を囲った部分が衛星放送に使用され
、中継器（トランスポンダ）の周波数は同一周波数帯で
重なり合っている。そして、これらの受信電波を第１周
波数変換器で変換する際の第１中間周波数の配列を第７
図（１）及び第７図（２）に示す。ここでも周波数配列
の実線で数字を囲った部分か衛星放送に使用されるもの
で、各衛星放送の垂直偏波と水平偏波の中継機の周波数
も部分的に重なっており、単純に合成することができな
いことを示している。Figures 6(1) and 6(2) show the frequency arrays of the repeaters of JC5AT and 5UPERBIRD, which are Japan's private communication satellites. The parts of the frequency arrays of these two communication satellites surrounded by solid lines are used for satellite broadcasting, and the frequencies of repeaters (transponders) overlap in the same frequency band. Then, the arrangement of the first intermediate frequency when converting these received radio waves by the first frequency converter is determined by the seventh
This is shown in Figure (1) and Figure 7 (2). Here again, the part of the frequency array with the number surrounded by a solid line is the one used for satellite broadcasting, and the frequencies of the vertically polarized wave and horizontally polarized wave repeater of each satellite broadcast partially overlap, so it can be simply combined. It shows that it is not possible.
本発明は上記のような実情に鑑みてなされたもので、そ
の目的とするところは、複数の衛星からの放送をそれぞ
り対応したアンテナで受信して得た複数の放送信号を一
本の伝送ケーブルで伝送することか可能な衛星放送受信
方式を提供することにある。The present invention was made in view of the above-mentioned circumstances, and its purpose is to combine multiple broadcast signals obtained by receiving broadcasts from multiple satellites with respective antennas into a single signal. The object of the present invention is to provide a satellite broadcast reception system that can be transmitted using a transmission cable.
［課題を解決するための手段及び作用］すなわち本発明
は、受信する衛星放送に対応した複数の受信アンテナと
、これらのアンテナそれぞれに装着され、アンテナで受
信した放送信号を一定の中間周波数信号に変換する第１
周波数変換器（コンバータ）と、これら第１周波数変換
器から与えられる各信号に対応し、それぞれ異なる第２
の中間周波数信号に変換する複数の第２の周波数変換回
路、これら複数の第２の周波数変換回路の出力をそれぞ
れ増幅する複数の第２の中間周波数増幅回路及びこれら
複数の第２の中間周波数増幅回路の出力信号を１信号に
合成して出力する合成器からなる第２中間周波数変換器
と、この第２中間周波数変換器の出力する第２中間周波
数信号を伝送する一本の伝送ケーブルと、この伝送ケー
ブルより入力される第２中間周波数信号を上記第１中間
周波数に再変換し、上記第１の中間周波数変換器の出力
と同一の上記複数の衛星放送に対応した中間周波数を出
力する第３の周波数変換器とを備えて、複数の衛星から
の受信信号を一本の伝送ケーブルで伝送するようにした
もので、複数の衛星からの放送信号を１本の伝送ケーブ
ルにより相互に干渉することなく伝送することが可能と
なる。[Means and effects for solving the problem] In other words, the present invention includes a plurality of receiving antennas corresponding to satellite broadcasting to be received, and a system that is attached to each of these antennas and converts the broadcast signal received by the antenna into a fixed intermediate frequency signal. 1st to convert
A frequency converter (converter) and a different second frequency converter corresponding to each signal given from these first frequency converters.
a plurality of second frequency conversion circuits that convert the outputs of the plurality of second frequency conversion circuits into intermediate frequency signals, a plurality of second intermediate frequency amplification circuits that respectively amplify the outputs of the plurality of second frequency conversion circuits, and these plurality of second intermediate frequency amplification circuits. a second intermediate frequency converter comprising a synthesizer that combines the output signals of the circuit into one signal and outputs the same; a single transmission cable that transmits the second intermediate frequency signal output from the second intermediate frequency converter; A second intermediate frequency signal input from the transmission cable is reconverted to the first intermediate frequency, and outputs an intermediate frequency corresponding to the plurality of satellite broadcasts that is the same as the output of the first intermediate frequency converter. 3 frequency converter, so that the received signals from multiple satellites are transmitted through one transmission cable, and the broadcast signals from multiple satellites are mutually interfered with through one transmission cable. It becomes possible to transmit data without any trouble.
［実施例コ 以下図面を参照して本発明の一実施例を説明する。[Example code] An embodiment of the present invention will be described below with reference to the drawings.
第１図はその概略構成を示すものであり、上記第７図に
示したものと同一部分には同一符号を付してその説明は
省略する。FIG. 1 shows a schematic configuration thereof, and the same parts as those shown in FIG. 7 are given the same reference numerals, and the explanation thereof will be omitted.
第１周波数変換器２ａ、 ２ｂの出力する信号は、とも
に第２周波数変換器７に送られ、この第２周波数変換器
７内で個々に第２の中間周波数信号に変換されてから１
つの信号に合成され、出力される。The signals output from the first frequency converters 2a and 2b are both sent to the second frequency converter 7, where they are individually converted into second intermediate frequency signals and then converted into second intermediate frequency signals.
The signals are combined into one signal and output.
出力された信号は一本の伝送ケーブル３により伝送され
て第３周波数変換器８に導かれる。第３周波数変換器８
は、上記第２周波数変換器７とほぼ反対を機能を持つも
のであり、伝送ケーブル３で伝送されてきた第２の周波
数信号を上記第１中間周波数に再変換、分岐し、上記第
１周波数変換器２ａ、 ２ｂの出力と同一の上記複数の
衛星放送に対応した第１中間周波数信号を受信機５へ出
力する続く第２図により上記第２周波数変換器７及び第
３周波数変換器８の詳細な構成について説明する。The output signal is transmitted by one transmission cable 3 and guided to the third frequency converter 8. Third frequency converter 8
has almost the opposite function to the second frequency converter 7, and reconverts and branches the second frequency signal transmitted by the transmission cable 3 to the first intermediate frequency, The first intermediate frequency signals corresponding to the plurality of satellite broadcasts, which are the same as the outputs of the converters 2a and 2b, are output to the receiver 5.The second and third frequency converters 7 and 8 are output as shown in FIG. The detailed configuration will be explained.
同図で、第１周波数変換器２ａ、 ２ｂからの第１周波
数倍号は、第２周波数変換器７内でまず第１中間周波数
増幅回路９ａ、 ９ｂによりレベル増幅された後、混合
回路１０ａ ＋’ １０ｂにおいて第２局部発振回路１
．１ａ 、 １．ｌｂの発振する相互に干渉しない周波
数配列での局部発振周波数信号により第２の周波数変換
かなされる。得られた２つの第２中間周波数信号はそれ
ぞれ、さらに第２中間周波数増幅回路１２ａ 、 １２
ｂで増幅され、バイパスフィルタ】３ａ。In the figure, the first frequency multiplier from the first frequency converters 2a, 2b is first amplified in level by the first intermediate frequency amplification circuits 9a, 9b in the second frequency converter 7, and then amplified by the mixing circuit 10a+ ' In 10b, the second local oscillation circuit 1
．． 1a, 1. The second frequency conversion is performed by the locally oscillated frequency signals of the 1b oscillated in a frequency arrangement that does not interfere with each other. The obtained two second intermediate frequency signals are further transmitted to second intermediate frequency amplification circuits 12a and 12, respectively.
b, amplified by bypass filter] 3a.
１３ｂで放送に不要な周波数成分を除去された後に合成
回路１４て合成されて１つの信号として伝送ケーブル３
へ送出される。After frequency components unnecessary for broadcasting are removed in step 13b, they are combined in a synthesis circuit 14 and sent to the transmission cable 3 as one signal.
sent to.
そして、伝送ケーブル３を介して第３周波数変換器８内
へ伝送された第２中間周波数信号は、まず分配回路１５
でその周波数配列により上記合成回路１４に入力される
以前の如く２つの信号に分配される。分配された２つの
第２中間周波数信号はそれぞれ、第２中間周波数増幅回
路ｌｅａ 、 １８ｂによりレベル増幅された後、混合
回路１７ａ 、 １７ｂにおいて第３局部発振回路１８
ａ 、 １８ｂの発振する局部発振周波数信号により上
記第１周波数変換器２ａ。The second intermediate frequency signal transmitted into the third frequency converter 8 via the transmission cable 3 is first transmitted to the distribution circuit 15.
According to the frequency arrangement, the signal is divided into two signals as before being input to the combining circuit 14. The two distributed second intermediate frequency signals are level amplified by second intermediate frequency amplification circuits lea and 18b, and then amplified in level by third local oscillation circuit 18 in mixing circuits 17a and 17b.
The first frequency converter 2a is operated by the local oscillation frequency signals oscillated by the first frequency converter 2a and 18b.
２ｂの出力と同一の中間周波数信号となるべく第３の周
波数変換により再変換される。得られた２つの第３中間
周波数信号はそれぞれ、さらに第１中間周波数増幅回路
１９ａ 、 １．９ｂで増幅され、次段の受信機５へ出
力される。It is reconverted by the third frequency conversion to become the same intermediate frequency signal as the output of 2b. The obtained two third intermediate frequency signals are further amplified by first intermediate frequency amplification circuits 19a and 1.9b, respectively, and output to the receiver 5 at the next stage.
このように第２の中間周波数を使って２つの信号を干渉
しない周波数配列で変換して１つの信号に合成したので
、２つの衛星Ａ、Ｂからの放送信号を相互に干渉するこ
となく１つの信号として伝送することかできる。In this way, the second intermediate frequency is used to convert the two signals in a frequency arrangement that does not interfere with each other and combine them into one signal, so the broadcast signals from the two satellites A and B can be combined into one signal without mutual interference. It can be transmitted as a signal.
なお、通信衛星によるＰＣＭ音楽放送のようにＪＣ５Ａ
Ｔ２号衛星と５ＵＰＥＲＢ ＩＲＤ−Ａ号衛星の垂直偏
波の中継器（トランスポンダ）か使用される場合は、第
３図に示すように一方の第１中間周波数信号は予め第２
中間周波数信号に変換し、他方の第１中間周波数信号を
変換せずにそのまま両者を合成して伝送することができ
、第２周波数変換器７側では第１中間周波数増幅回路９
ｂ、混合回路１０ｂ１第２局部発振回路Ｌｌｂ及び第２
中間周波数増幅回路１２ｂを、第３周波数変換器８側で
は第２中間周波数増幅回路ｉｅｂ 、混合回路１７ｂ１
第３局部発振回路１８ｂ及び第１中間周波数増幅回路１
９ｂをそれぞれ簡略化することができ、装置構成上有利
となる。In addition, like PCM music broadcasting by communication satellite, JC5A
When vertically polarized repeaters (transponders) of the T2 satellite and the 5UPERB IRD-A satellite are used, one of the first intermediate frequency signals is pre-transponded to the second intermediate frequency signal as shown in Figure 3.
The first intermediate frequency signal can be converted into an intermediate frequency signal, and the two can be combined and transmitted as they are without converting the other first intermediate frequency signal, and on the second frequency converter 7 side, the first intermediate frequency amplification circuit 9
b, mixing circuit 10b1 second local oscillation circuit Llb and second
The intermediate frequency amplification circuit 12b is connected to the second intermediate frequency amplification circuit ieb and the mixing circuit 17b1 on the third frequency converter 8 side.
Third local oscillation circuit 18b and first intermediate frequency amplifier circuit 1
9b can be simplified, which is advantageous in terms of device configuration.
また、上記受信方式を共同受信施設に適用した場合の回
路構成について第４図により説明する。Further, a circuit configuration when the above reception method is applied to a communal reception facility will be explained with reference to FIG.
同図で２０及び２１は通信衛星用の放送受信アンテナ、
２２は放送衛星用の放送受信アンテナ、２３及び２４は
ＶＨＦ及びＵＨＦの地上放送受信アンテナである。放送
受信アンテナ２０．２１での受信信号を第２周波数変換
器７において第２中間周波数による周波数変換、合成を
施した後に混合器２５に送出する。この混合器２５には
また上記放送受信アンテナ２２、地上放送受信アンテナ
２３．２４からの受信信号か直接送られてきており、こ
れらの入力をそれぞれ一括合成し、伝送ケーブル３を介
して分配器２６に伝送する。分配器２６は、伝送されて
きた信号を複数の分岐器２７．２７．・・・のそれぞれ
に分配出力する。各分岐器２７ては、受信した信号を後
段の分岐器２７へ伝送する一方、第３周波数変換器８へ
を介して受信機５へも伝送する。したがって、上記のよ
うな共同受信施設においても各アンテナ２０〜２４から
の受信信号を一本の伝送ケーブル３により伝送し、受信
機５に出力することができる。In the figure, 20 and 21 are broadcast receiving antennas for communication satellites.
22 is a broadcast receiving antenna for a broadcasting satellite, and 23 and 24 are VHF and UHF terrestrial broadcast receiving antennas. The signals received by the broadcast receiving antennas 20 and 21 are subjected to frequency conversion and synthesis using the second intermediate frequency in the second frequency converter 7, and then sent to the mixer 25. Received signals from the broadcast receiving antenna 22 and the terrestrial broadcast receiving antennas 23 and 24 are also directly sent to the mixer 25, and these inputs are collectively combined and sent to the distributor 26 via the transmission cable 3. to be transmitted. The distributor 26 divides the transmitted signal into a plurality of branchers 27, 27 . Distributed output to each of... Each branching device 27 transmits the received signal to the subsequent branching device 27, and also to the receiver 5 via the third frequency converter 8. Therefore, even in the above-described communal reception facility, the received signals from each of the antennas 20 to 24 can be transmitted through one transmission cable 3 and output to the receiver 5.
［発明の効果］
以上に述べた如く本発明によれば、受信する衛星放送に
対応した複数の受信アンテナと、これらのアンテナそれ
ぞれに装着され、アンテナで受信した放送信号を一定の
中間周波数信号に変換する第１周波数変換器（コンバー
タ）と、これら第１周波数変換器から与えられる各信号
に対応し、それぞれ異なる第２の中間周波数信号に変換
する複数の第２の周波数変換回路、これら複数の第２の
周波数変換回路の出力をそれぞれ増幅する複数の第２の
中間周波数増幅回路及びこれら複数の第２の中間周波数
増幅回路の出力信号を１信号に合成して出力する合成器
からなる第２中間周波数変換器と、この第２中間周波数
変換器の出力する第２中間周波数信号を伝送する一本の
伝送ケーブルと、この伝送ケーブルより入力される第２
中間周波数信号を上記第１中間周波数に再変換し、上記
第１の中間周波数変換器の出力と同一の上記複数の衛星
放送に対応した中間周波数を出力する第３の周波数変換
器とを備え、複数の衛星からの受信信号を一本の伝送ケ
ーブルで伝送するようにしたので、複数の衛星からの放
送をそれぞり対応したアンテナで受信して得た複数の放
送信号を一本の伝送ケーブルで伝送することか可能な衛
星放送受信方式を提供することができる。[Effects of the Invention] As described above, according to the present invention, there are a plurality of receiving antennas corresponding to satellite broadcasting to be received, and a device that is attached to each of these antennas and converts the broadcast signal received by the antenna into a fixed intermediate frequency signal. A first frequency converter (converter) that converts, a plurality of second frequency conversion circuits that correspond to each signal given from these first frequency converters and convert them into different second intermediate frequency signals, and these plurality of A second intermediate frequency amplifier comprising a plurality of second intermediate frequency amplifier circuits that amplify the outputs of the second frequency conversion circuits, respectively, and a synthesizer that combines the output signals of the plurality of second intermediate frequency amplifier circuits into one signal and outputs the signal. an intermediate frequency converter, a transmission cable that transmits a second intermediate frequency signal output from the second intermediate frequency converter, and a second intermediate frequency signal that is input from the transmission cable.
a third frequency converter that reconverts the intermediate frequency signal to the first intermediate frequency and outputs an intermediate frequency corresponding to the plurality of satellite broadcasts that is the same as the output of the first intermediate frequency converter; Since the received signals from multiple satellites are transmitted through a single transmission cable, multiple broadcast signals obtained by receiving broadcasts from multiple satellites using their respective antennas can be transmitted over a single transmission cable. It is possible to provide a satellite broadcast reception system that allows transmission.
【図面の簡単な説明】
第１図は本発明の一実施例に係る構成を示すブロック図
、第２図は第１図の特に第２周波数変換器及び第３周波
数変換器内の詳細な回路構成を示すブロック図、第３図
は第２図の一部回路を簡略化した回路構成を例示するブ
ロック図、第４図は第１図の構成を共同受信施設に適用
した場合の回路構成を例示するブロック図、第５図は従
来の衛星放送受信方式の一般構成を示す図、第６図は通
信衛星ＪＣ３ＡＴと５ＵＰＥＲＢＩＲＤの周波数配列を
示す図、第７図は同中間周波数配列を示す図である。
Ｉａ、 Ｌｂ・・・アンテナ、２ａ、 ２ｂ・・・第１
周波数変換器、３・・・伝送ケーブル、５・・・受信機
、７・・・第２周波数変換器、８・・・第３周波数変換
器、９ａ、 ９ｂ、 １９ａ 。
１９ｂ・・・第１中間周波数増幅回路、ｌＯａ 、 ｌ
Ｏｂ 。
１７ａ 、 １７ｂ−・・混合回路、ｌｌａ 、 １．
Ｉｂ ・・第２局部発振回路、１２ａ 、 １２ｂ 、
ｌｅａ 、 １６ｂ −＝第２中間周波数増幅回路、
１３ａ 、 １３ｂ・・・バイパスフィルタ、１４・・
・合成回路、１５・・・分配回路、１．８ａ 、 １８
ｂ・・・第３局部発振回路、２０．２１．２２・・・放
送受信アンテナ、２３、２４・・・地上放送受信アンテ
ナ、２５・・・混合器、２６・・・分配器、２７・・・
分岐器。
出願人代理人 弁理士 鈴江武彦
１ 派
ノｎ
第４図
く 山[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing a configuration according to an embodiment of the present invention, and FIG. 2 is a detailed circuit diagram of the second frequency converter and third frequency converter shown in FIG. FIG. 3 is a block diagram illustrating a simplified circuit configuration of a part of the circuit in FIG. 2, and FIG. 4 is a block diagram illustrating the circuit configuration when the configuration in FIG. 5 is a diagram showing the general configuration of a conventional satellite broadcasting receiving system, FIG. 6 is a diagram showing the frequency arrangement of communication satellites JC3AT and 5UPER BIRD, and FIG. 7 is a diagram showing the intermediate frequency arrangement of the same. be. Ia, Lb... antenna, 2a, 2b... first
Frequency converter, 3... Transmission cable, 5... Receiver, 7... Second frequency converter, 8... Third frequency converter, 9a, 9b, 19a. 19b...first intermediate frequency amplification circuit, lOa, l
Ob. 17a, 17b--Mixed circuit, lla, 1.
Ib...Second local oscillation circuit, 12a, 12b,
lea, 16b -=second intermediate frequency amplification circuit,
13a, 13b... bypass filter, 14...
・Composition circuit, 15...Distribution circuit, 1.8a, 18
b... Third local oscillation circuit, 20.21.22... Broadcast receiving antenna, 23, 24... Terrestrial broadcast receiving antenna, 25... Mixer, 26... Distributor, 27...・
Turnout. Applicant's agent Patent attorney Takehiko Suzue 1 School No. 4 Figure 4
Claims (1)
方式において、 受信する衛星放送に対応した複数の受信アンテナと、 これらのアンテナそれぞれに装着され、アンテナで受信
した放送信号を一定の中間周波数信号に変換する第１周
波数変換器と、 これら第１周波数変換器から与えられる各信号に対応し
、それぞれ異なる第２の中間周波数信号に変換する複数
の第２の周波数変換回路、これら複数の第２の周波数変
換回路の出力をそれぞれ増幅する複数の第２の中間周波
数増幅回路及びこれら複数の第２の中間周波数増幅回路
の出力信号を１信号に合成して出力する合成器からなる
第２中間周波数変換器と、 この第２中間周波数変換器の出力する第２中間周波数信
号を伝送する一本の伝送ケーブルと、この伝送ケーブル
より入力される第２中間周波数信号を上記第１中間周波
数に再変換し、上記第１の中間周波数変換器の出力と同
一の上記複数の受信衛星に対応した中間周波数を出力す
る第３の周波数変換器と を具備し、複数の衛星からの受信信号を一本の伝送ケー
ブルで伝送することを特徴とする衛星放送受信方式。[Scope of Claims] A satellite broadcasting receiving system that receives satellite broadcasting from a plurality of artificial satellites includes a plurality of receiving antennas corresponding to the satellite broadcasting to be received, and a plurality of receiving antennas attached to each of these antennas to receive broadcasting signals received by the antennas. a first frequency converter that converts into a constant intermediate frequency signal; a plurality of second frequency conversion circuits that correspond to each signal provided from these first frequency converters and convert each signal into a different second intermediate frequency signal; A plurality of second intermediate frequency amplification circuits that amplify the outputs of these plurality of second frequency conversion circuits, respectively, and a synthesizer that combines the output signals of these plurality of second intermediate frequency amplification circuits into one signal and outputs the signal. a second intermediate frequency converter, a transmission cable for transmitting a second intermediate frequency signal output from the second intermediate frequency converter, and a second intermediate frequency signal input from the transmission cable for transmitting the second intermediate frequency signal to the first intermediate frequency converter; a third frequency converter that reconverts the intermediate frequency to an intermediate frequency and outputs an intermediate frequency corresponding to the plurality of receiving satellites that is the same as the output of the first intermediate frequency converter, and A satellite broadcast reception system characterized by transmitting signals over a single transmission cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31896990A JPH04189036A (en) | 1990-11-22 | 1990-11-22 | Satellite broadcast transmission/reception system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31896990A JPH04189036A (en) | 1990-11-22 | 1990-11-22 | Satellite broadcast transmission/reception system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04189036A true JPH04189036A (en) | 1992-07-07 |
Family
ID=18105017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31896990A Pending JPH04189036A (en) | 1990-11-22 | 1990-11-22 | Satellite broadcast transmission/reception system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04189036A (en) |
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-
1990
- 1990-11-22 JP JP31896990A patent/JPH04189036A/en active Pending
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