JP5483678B2

JP5483678B2 - Millimeter wave transmission system

Info

Publication number: JP5483678B2
Application number: JP2009153017A
Authority: JP
Inventors: 茂夫近田
Original assignee: Ｄｘアンテナ株式会社
Priority date: 2009-06-26
Filing date: 2009-06-26
Publication date: 2014-05-07
Anticipated expiration: 2029-06-26
Also published as: JP2011010147A

Description

本発明は、ミリ波を１台のミリ波送信アンテナから送信し、複数台のミリ波受信アンテナで受信させるミリ波伝送システムに関する。 The present invention relates to a millimeter wave transmission system in which millimeter waves are transmitted from one millimeter wave transmission antenna and received by a plurality of millimeter wave reception antennas.

従来、上記のようなミリ波伝送システムは、例えば特許文献１に開示されているように、高層建築物の屋上に設置されたミリ波送信機から下方向に向けてミリ波を送信し、高層建築物の各階にミリ波信号を受信するミリ波受信アンテナを設置したものがある。 Conventionally, the millimeter wave transmission system as described above, for example, as disclosed in Patent Document 1, transmits a millimeter wave downward from a millimeter wave transmitter installed on the roof of a high-rise building. Some buildings have millimeter-wave receiving antennas that receive millimeter-wave signals on each floor.

特許第４２０４３８７号Patent No. 4420387

このようなミリ波伝送システムでは、ミリ波送信アンテナに近い高層階に設置されたミリ波受信アンテナでの電界強度は大きくなり、屋上から離れた低層階に設置されたミリ波受信アンテナでの電界強度は小さくなる。これらミリ波受信アンテナでの受信信号は、受信機器に供給されるが、この受信信号が飽和すると、受信機器の入力信号の品質が劣化することがある。このような場合、正常な受信を行うことができない。これを防止しようとすると、高層階のミリ波受信アンテナの受信信号のレベルを低下させるように、各受信機器に減衰器を設置し、その減衰量をそれぞれ調整する必要がある。しかし、このような調整を一個一個の受信機器に対して行うことは非常に面倒な作業となる。 In such a millimeter-wave transmission system, the electric field strength at the millimeter-wave receiving antenna installed on the higher floor near the millimeter-wave transmitting antenna increases, and the electric field at the millimeter-wave receiving antenna installed on the lower floor far from the rooftop. The strength is reduced. Signals received by these millimeter wave receiving antennas are supplied to the receiving device. When this received signal is saturated, the quality of the input signal of the receiving device may deteriorate. In such a case, normal reception cannot be performed. In order to prevent this, it is necessary to install an attenuator in each receiving device and adjust the amount of attenuation so as to reduce the level of the received signal of the millimeter wave receiving antenna on the higher floor. However, it is very troublesome to perform such adjustment for each receiving device.

本発明は、個別の調整を行わなくても、ミリ波送信アンテナから送信されるミリ波を受信するミリ波受信アンテナの受信電界強度を適切な値とすることができるミリ波伝送システムを提供することを目的とする。 The present invention provides a millimeter wave transmission system that can set the reception field strength of a millimeter wave receiving antenna that receives a millimeter wave transmitted from a millimeter wave transmission antenna to an appropriate value without performing individual adjustment. For the purpose.

本発明の一態様のミリ波伝送システムは、複数の階からなり各階に少なくとも２つの部屋が隣接して配置されている建築物の屋上に、下方を向いて設置されたミリ波送信アンテナと、前記ミリ波送信アンテナに、ミリ波信号を供給するミリ波送信手段とを、有している。ミリ波送信信号としては、例えばテレビジョン放送信号、具体的には地上デジタルテレビジョン放送信号や衛星放送中間周波信号や衛星通信中間周波信号を周波数変換したものを使用することができる。ミリ波送信アンテナとしては、例えばパラボラアンテナ（オフセットパラボラアンテナを含む）や誘電体アンテナなどを使用することができる。前記建築物の複数の階の前記部屋の外部に、前記ミリ波送信アンテナ側を向いて複数のミリ波受信アンテナが設置され、これらミリ波受信アンテナは、前記ミリ波送信アンテナが送信した前記ミリ波信号を受信する。ミリ波受信アンテナとしては、上述したミリ波送信アンテナと同様なものを使用することができる。前記各ミリ波受信アンテナが受信したミリ波信号が、これらに対応する複数のミリ波受信手段に入力される。ミリ波受信手段は、その入力したミリ波信号のレベルが大きいとき、出力が飽和するもので、例えば増幅手段を備えたもので、具体的には増幅手段を備えた周波数変換手段である。この周波数変換手段は、受信したミリ波信号を元の上述したようなテレビジョン放送信号に周波数変換する。前記ミリ波受信アンテナのうち、前記ミリ波送信アンテナ付近に位置する階にある少なくとも１つのミリ波受信アンテナである第１のミリ波受信アンテナは、前記隣接する２つの部屋の配列方向において前記ミリ波送信アンテナのビーム角度範囲の外部に位置するビーム角度範囲は、例えばビーム中心軸と、電界強度が中心軸での電界強度の約１／２となる位置との間である。 A millimeter-wave transmission system according to an aspect of the present invention includes a millimeter-wave transmission antenna that is installed facing downward on a rooftop of a building including a plurality of floors and at least two rooms arranged adjacent to each other. Millimeter wave transmission means for supplying a millimeter wave signal to the millimeter wave transmission antenna . As the millimeter wave transmission signal, for example, a television broadcast signal, specifically, a terrestrial digital television broadcast signal, a satellite broadcast intermediate frequency signal, or a satellite communication intermediate frequency signal obtained by frequency conversion can be used. As the millimeter wave transmission antenna, for example, a parabolic antenna (including an offset parabolic antenna), a dielectric antenna, or the like can be used. A plurality of millimeter-wave receiving antennas are installed outside the rooms on the floors of the building so as to face the millimeter-wave transmitting antenna, and these millimeter-wave receiving antennas are transmitted from the millimeter-wave transmitting antenna. Receive a wave signal. As the millimeter wave receiving antenna, the same one as the millimeter wave transmitting antenna described above can be used. The millimeter wave signals received by the respective millimeter wave receiving antennas are input to a plurality of millimeter wave receiving means corresponding thereto. The millimeter wave receiving means is such that the output is saturated when the level of the inputted millimeter wave signal is large. For example, the millimeter wave receiving means is provided with an amplifying means, and is specifically a frequency converting means provided with the amplifying means. This frequency conversion means converts the frequency of the received millimeter wave signal into the original television broadcast signal as described above. Of the millimeter-wave receiving antennas, the first millimeter-wave receiving antenna, which is at least one millimeter-wave receiving antenna on a floor located near the millimeter-wave transmitting antenna, has the millimeter wave in the arrangement direction of the two adjacent rooms. The beam angle range located outside the beam angle range of the wave transmitting antenna is, for example, between the beam center axis and a position where the electric field strength is about ½ of the electric field strength at the central axis.

このように構成されたミリ波伝送システムでは、ミリ波送信アンテナの近傍にある第１のミリ波受信アンテナは、ビーム角度範囲の外部に位置しているので、その位置での電界強度は小さく、受信手段での受信レベルが大きくならず、受信手段の出力が飽和することを防止できる。 In the millimeter wave transmission system configured in this way, the first millimeter wave receiving antenna in the vicinity of the millimeter wave transmitting antenna is located outside the beam angle range, so the electric field strength at that position is small, The reception level at the receiving means does not increase, and the output of the receiving means can be prevented from being saturated.

前記ミリ波受信アンテナの前記第１のミリ波受信アンテナよりも下方の階にある前記ミリ波受信アンテナである第２のミリ波受信アンテナは、前記隣接する２つの部屋の配列方向において前記ミリ波送信アンテナのほぼ前記ビーム角度範囲に位置するものとすることができる。第２のミリ波受信アンテナは互いに重なり合わないように配置することが望ましい。 The second millimeter wave receiving antenna, which is the millimeter wave receiving antenna on the floor below the first millimeter wave receiving antenna of the millimeter wave receiving antenna, has the millimeter wave in the arrangement direction of the two adjacent rooms. The transmission antenna may be positioned approximately in the beam angle range. It is desirable to arrange the second millimeter wave receiving antennas so as not to overlap each other.

このように構成すると、ミリ波送信アンテナから離れた位置にある第２のミリ波受信アンテナのミリ波送信アンテナに近いミリ波受信アンテナがミリ波送信アンテナから遠いミリ波受信アンテナを遮蔽することなく、所望の電界強度でミリ波信号を受信することができる。 With this configuration, the millimeter wave receiving antenna close to the millimeter wave transmitting antenna of the second millimeter wave receiving antenna located away from the millimeter wave transmitting antenna does not shield the millimeter wave receiving antenna far from the millimeter wave transmitting antenna. The millimeter wave signal can be received at a desired electric field strength.

更に、前記第１のミリ波受信アンテナが複数である場合、それらのうち前記ミリ波送信アンテナにより近い階にある少なくとも１つの第３のミリ波受信アンテナは、前記ビーム角度範囲よりも予め定めた角度だけ広い角度範囲の外部に位置するものとできる。この場合、前記第１のミリ波受信アンテナのうち前記第３のミリ波受信アンテナ以外の階にあるものである第４のミリ波受信アンテナは、前記広い角度範囲のうち前記ビーム角度範囲外の部分に位置する。 Furthermore, when there are a plurality of the first millimeter-wave receiving antennas, at least one third millimeter-wave receiving antenna on the floor closer to the millimeter-wave transmitting antenna is determined in advance from the beam angle range. It can be located outside the wide angle range by the angle. In this case, the fourth millimeter-wave receiving antenna that is on the floor other than the third millimeter-wave receiving antenna among the first millimeter-wave receiving antennas is outside the beam angle range in the wide angle range. Located in the part.

このように構成すると、第３のミリ波受信アンテナは、よりミリ波送信アンテナに近い位置にあるが、前記広い角度範囲よりも外部にあるので、受信手段の出力が飽和することのない受信電界強度となる。また、第４のミリ波受信アンテナは、第３のミリ波受信アンテナよりはミリ波送信アンテナから遠い位置にあるが、第２のミリ波受信アンテナよりはミリ波送信アンテナに近い位置にあるので、前記広い角度範囲のうち前記ビーム角度範囲外の部分に位置することによって、受信手段の出力が飽和することがない受信電界強度となる。 With this configuration, the third millimeter-wave receiving antenna is located closer to the millimeter-wave transmitting antenna, but is located outside the wide angle range, so that the reception electric field that does not saturate the output of the receiving means. It becomes strength. In addition, the fourth millimeter wave receiving antenna is located farther from the millimeter wave transmitting antenna than the third millimeter wave receiving antenna, but is closer to the millimeter wave transmitting antenna than the second millimeter wave receiving antenna. By locating in a portion outside the beam angle range in the wide angle range, the reception electric field intensity is such that the output of the reception means does not saturate.

更に、前記第３のミリ波受信アンテナが複数の場合、それらのうち前記ミリ波送信アンテナに近い階にあるものほど、前記ミリ波送信アンテナのビームの中心軸に近い位置に配置することができる。ビーム角度範囲は、ミリ波送信アンテナに近いほどその領域が小さいので、ミリ波送信アンテナに近い第３のミリ波受信アンテナは、電界強度が大きくなるビーム中心軸側に近づけてある。 Furthermore, when there are a plurality of the third millimeter wave receiving antennas, the one closer to the floor closer to the millimeter wave transmitting antenna can be arranged closer to the central axis of the beam of the millimeter wave transmitting antenna. . Since the beam angle range is smaller as it is closer to the millimeter wave transmission antenna, the third millimeter wave reception antenna closer to the millimeter wave transmission antenna is closer to the beam center axis side where the electric field strength increases.

第２のミリ波受信アンテナのうち、前記ミリ波送信アンテナから最も遠い階にあるものは、前記ミリ波送信アンテナにほぼ正対し、他の階にあるものは前記ミリ波送信アンテナに近づくほど前記ミリ波送信アンテナのビームの中心軸から離れて位置するものとすることができる。ミリ波送信アンテナから最も遠い第２のミリ波受信アンテナは、電界強度が低い可能性が高いので、ミリ波送信アンテナと正対させることによって良好にミリ波を受信させる。他の第２のミリ波受信アンテナは、最も遠い第２のミリ波受信アンテナよりもミリ波送信アンテナに近いので、最もミリ波送信アンテナから遠い位置にあるミリ波受信アンテナとほぼ同一の受信電界強度となるようにビーム中心軸から離れた位置に設置されている。 Of the second millimeter wave receiving antenna, what is the farthest floor from the millimeter wave transmitting antenna is substantially directly opposite to the millimeter wave transmitting antenna, is what is the other floors the closer to the millimeter wave transmitting antenna It can be located away from the central axis of the beam of the millimeter wave transmitting antenna . Since the second millimeter-wave receiving antenna farthest from the millimeter-wave transmitting antenna is likely to have a low electric field strength, the millimeter-wave can be favorably received by facing the millimeter-wave transmitting antenna. Since the other second millimeter wave receiving antenna is closer to the millimeter wave transmitting antenna than the farthest second millimeter wave receiving antenna, the reception electric field is almost the same as the millimeter wave receiving antenna located farthest from the millimeter wave transmitting antenna. It is installed at a position away from the beam center axis so as to be strong.

上記の本発明の一態様と同様にミリ波送信アンテナ、ミリ波送信手段、ミリ波受信アンテナ及びミリ波受信手段を配置し、前記各ミリ波受信アンテナを、前記送信ミリ波アンテナから最も遠い階にあるものが、前記ミリ波送信アンテナにほぼ正対させ、前記ミリ波送信アンテナに近い階にあるものほど、前記２つの部屋の配列方向において前記ミリ波送信アンテナのビームの中心軸から離れて配置されている。このように構成した場合でも、ミリ波送信アンテナに近い位置にあるミリ波受信アンテナの電界強度を小さくすることができ、受信手段の出力の飽和を防止できる。 As in the above-described aspect of the present invention, a millimeter wave transmission antenna, a millimeter wave transmission unit, a millimeter wave reception antenna, and a millimeter wave reception unit are arranged, and each of the millimeter wave reception antennas is arranged at a level farthest from the transmission millimeter wave antenna. Is located in a position that is substantially opposite to the millimeter-wave transmission antenna and located closer to the floor near the millimeter-wave transmission antenna, the farther away from the central axis of the beam of the millimeter-wave transmission antenna in the arrangement direction of the two rooms. Has been placed. Even in such a configuration, it is possible to reduce the electric field strength of the millimeter wave receiving antenna located near the millimeter wave transmitting antenna, and to prevent saturation of the output of the receiving means.

以上のように、本発明によれば、受信手段を個別に調整することなく、ミリ波送信アンテナから送信されるミリ波を受信するミリ波受信アンテナの受信電界強度を、受信手段の出力が飽和することのない適切なレベルとすることができる。 As described above, according to the present invention, the output of the reception unit is saturated with the reception field strength of the millimeter wave reception antenna that receives the millimeter wave transmitted from the millimeter wave transmission antenna without individually adjusting the reception unit. It is possible to make it an appropriate level without doing.

本発明の第１実施形態のミリ波伝送システムのミリ波送信アンテナとミリ波受信アンテナとの配置を示す図である。It is a figure which shows arrangement | positioning of the millimeter wave transmission antenna and millimeter wave receiving antenna of the millimeter wave transmission system of 1st Embodiment of this invention. 図１のミリ波伝送システムで使用する送信機の一例のブロック図である。It is a block diagram of an example of the transmitter used with the millimeter wave transmission system of FIG. 図１のミリ波伝送システムで使用する送信機の他の例のブロック図である。It is a block diagram of the other example of the transmitter used with the millimeter wave transmission system of FIG. 図１のミリ波伝送システムで使用する受信機の一例のブロック図である。It is a block diagram of an example of the receiver used with the millimeter wave transmission system of FIG. 本発明の第２実施形態のミリ波伝送システムのミリ波送信アンテナとミリ波受信アンテナとの配置を示す図である。It is a figure which shows arrangement | positioning of the millimeter wave transmission antenna and millimeter wave receiving antenna of the millimeter wave transmission system of 2nd Embodiment of this invention.

本発明の第１実施形態のミリ波伝送システムは、高層建築物、例えば高層マンションの各部屋に地上デジタルテレビジョン放送信号や、ＢＳ・ＣＳ１１０度信号を伝送しようとする場合に、マンション内にこれらの信号を伝送するためのケーブルを新たに敷設しにくい場合に適用されるものである。 The millimeter wave transmission system according to the first embodiment of the present invention is designed to transmit digital terrestrial television broadcasting signals and BS / CS110 degree signals to each room of a high-rise building such as a high-rise apartment. This is applied when it is difficult to newly lay a cable for transmitting the above signal.

図２に示すように、ＵＨＦ帯のテレビジョン放送信号がＵＨＦ帯受信アンテナ２によって受信され、ヘッドエンド４に供給される。ヘッドエンド４では、これらＵＨＦ帯のテレビジョン放送信号のうち所望の複数の地上デジタルテレビジョン放送信号が選択され、これら地上デジタルテレビジョン放送信号のレベルが揃えられる。同様に、ＢＳ・１１０度ＣＳアンテナ６で受信されたＢＳ信号及び１１０度ＣＳ信号が、ＢＳ・１１０度ＣＳアンテナ６に付属するコンバータ８で、ＢＳ中間周波信号と１１０度ＣＳ中間周波信号とに変換され、分波器１０に供給されて、ここでＢＳ中間周波信号と１１０度ＣＳ中間周波信号とに分波され、ＢＳ中間周波信号は減衰器１２によって、１１０度ＣＳ中間周波信号は減衰器１４によって、それぞれレベルが揃うように調整され、混合器１６によって混合される。 As shown in FIG. 2, a UHF band television broadcast signal is received by the UHF band receiving antenna 2 and supplied to the head end 4. The head end 4 selects a desired plurality of terrestrial digital television broadcast signals from the UHF band television broadcast signals, and the levels of these terrestrial digital television broadcast signals are aligned. Similarly, a BS signal and a 110 degree CS signal received by the BS · 110 ° CS antenna 6 are converted into a BS intermediate frequency signal and a 110 ° CS intermediate frequency signal by a converter 8 attached to the BS · 110 ° CS antenna 6. The signal is converted and supplied to the demultiplexer 10 where it is demultiplexed into a BS intermediate frequency signal and a 110 degree CS intermediate frequency signal. The BS intermediate frequency signal is attenuated by the attenuator 12 and the 110 degree CS intermediate frequency signal is attenuated. 14, the levels are adjusted to be equal to each other and mixed by the mixer 16.

ヘッドエンド４からの地上デジタル放送信号並びに混合器１６からのＢＳ中間周波信号及び１１０度ＣＳ中間周波信号は、混合器１７で混合されて、送信ユニット１８の送信手段、例えばコンバータ２０に供給され、このコンバータ２０によって、ミリ波帯信号に周波数変換され、送信ユニット１８のミリ波送信アンテナ２２に供給され、送信される。 The terrestrial digital broadcast signal from the head end 4 and the BS intermediate frequency signal and 110 degree CS intermediate frequency signal from the mixer 16 are mixed by the mixer 17 and supplied to the transmission means of the transmission unit 18, for example, the converter 20, This converter 20 converts the frequency into a millimeter-wave band signal, and supplies the millimeter-wave signal to the millimeter-wave transmission antenna 22 of the transmission unit 18 for transmission.

なお、図３に示すように、地上デジタル放送信号は、ＵＨＦ帯受信アンテナ２によって受信されたＵＨＦ帯のテレビジョン放送信号のうちローパスフィルタ２４によって抽出することもできる。この場合、ローパスフィルタ２４の出力に含まれるＶＨＦ帯の信号を除去するために、ローパスフィルタ２４の出力はＶＨＦカットフィルタ２６を介し、混合器１７でＢＳ中間周波信号と１１０度ＣＳ中間周波信号と混合されて、コンバータ２０に供給される。 As shown in FIG. 3, the terrestrial digital broadcast signal can be extracted by the low-pass filter 24 from the UHF band television broadcast signal received by the UHF band receiving antenna 2 . In this case, in order to remove the VHF band signal included in the output of the low-pass filter 24, the output of the low-pass filter 24 passes through the VHF cut filter 26, and the mixer 17 outputs the BS intermediate frequency signal and the 110-degree CS intermediate frequency signal. It is mixed and supplied to the converter 20.

図１に示すように、送信ユニット１８は、高層マンション２８の屋上に取り付けられている。なお、ＵＨＦ帯受信アンテナ２、ヘッドエンド４、ＢＳ・１１０度ＣＳアンテナ６、分波器１０、減衰器１２、１４、混合器１６、１７も、屋上に取り付けられている。マンション２８は、例えば１４階建てのものである。 As shown in FIG. 1, the transmission unit 18 is attached to the roof of the high-rise apartment 28. The UHF band receiving antenna 2, the head end 4, the BS / 110 degree CS antenna 6, the duplexer 10, the attenuators 12, 14, and the mixers 16, 17 are also mounted on the roof. The apartment 28 is, for example, a 14-story building.

送信ユニット１８は、具体的には、マンション２８の各階において隣接する２つの部屋の境界となる支柱３０の上方に、幾分外方にせり出すように配置されている。送信ユニット１８のミリ波送信アンテナ２２は、誘電体アンテナ、例えば電波レンズアンテナで、中心線で示すそのビームの中心軸が支柱３０の長さ方向に沿って位置するように下方に向けて配置されている。 Specifically, the transmission unit 18 is arranged so as to protrude somewhat outwardly above the column 30 that is a boundary between two adjacent rooms on each floor of the apartment 28. The millimeter wave transmission antenna 22 of the transmission unit 18 is a dielectric antenna, for example, a radio wave lens antenna, and is disposed downward so that the center axis of the beam indicated by the center line is located along the length direction of the support column 30. ing.

このミリ波送信アンテナ２２は、そのビーム中心軸上で最も電界強度が高くなる。電界強度が中心軸での電界強度の１／２となるラインの中心軸に対する角度がビーム角であり、中心軸の両側にそれぞれある。このビーム角は、電波レンズアンテナの口径と使用するミリ波帯信号の波長とによって決定される。このビーム角度±２度のラインを破線で示し、ビーム角度±４度のラインを２点鎖線で示す。ビーム中心軸であっても、ミリ波送信アンテナ２２の電界強度は、ミリ波送信アンテナ２２に最も近い位置にある１４階付近が最も大きく、ミリ波送信アンテナ２２から最も遠い１階付近で最も小さくなる。また、同じ階であっても、ビーム中心軸から離れるほど電界強度は小さくなり、ビーム中心軸、ビーム角度±２度ライン、ビーム角度±４度ラインの順に電界強度は小さくなる。また、ビーム角度±２度ラインで囲まれるビーム角度±２度範囲及びビーム角度±４度ラインで囲まれるビーム角度±４度範囲は、上方の階から下方の階に向かうほど広くなる。 The millimeter wave transmitting antenna 22 has the highest electric field strength on the center axis of the beam. The angle with respect to the central axis of the line where the electric field intensity is ½ of the electric field intensity at the central axis is the beam angle, and is on both sides of the central axis. This beam angle is determined by the aperture of the radio wave lens antenna and the wavelength of the millimeter waveband signal used. The line with a beam angle of ± 2 degrees is indicated by a broken line, and the line with a beam angle of ± 4 degrees is indicated by a two-dot chain line. Even on the beam center axis, the electric field strength of the millimeter wave transmission antenna 22 is the largest near the 14th floor closest to the millimeter wave transmission antenna 22 and the smallest near the first floor farthest from the millimeter wave transmission antenna 22. Become. Even on the same floor, the electric field strength decreases as the distance from the beam central axis increases, and the electric field strength decreases in the order of the beam central axis, the beam angle ± 2 degree line, and the beam angle ± 4 degree line. Further, the beam angle ± 2 ° range surrounded by the beam angle ± 2 ° line and the beam angle ± 4 ° range surrounded by the beam angle ± 4 ° line become wider from the upper floor toward the lower floor.

このミリ波送信アンテナ２２から送信されたミリ波を受信するために、受信ユニット３２が、各階の支柱３０の両側にある部屋のベランダにそれぞれ外方にせり出して設けられている。受信ユニット３２は、図４に示すように、ミリ波受信アンテナ３４を有している。ミリ波受信アンテナ３４としては、例えばミリ波送信アンテナ２２と同様な電波レンズアンテナを使用している。 In order to receive the millimeter wave transmitted from the millimeter wave transmission antenna 22, the reception unit 32 is provided so as to protrude outward from the veranda of the room on both sides of the support column 30 on each floor. As shown in FIG. 4, the receiving unit 32 has a millimeter wave receiving antenna 34. As the millimeter wave receiving antenna 34, for example, a radio wave lens antenna similar to the millimeter wave transmitting antenna 22 is used.

ミリ波受信アンテナ３４によって受信されたミリ波信号は、受信ユニット３２に設けられている受信手段、例えばコンバータ３６に供給され、ここで元の地上デジタルテレビジョン放送信号、ＢＳ中間周波信号、１１０度ＣＳ中間周波信号に周波数変換され、分波器３８によって分波され、各部屋内に設けられている地上デジタルチューナ４０に地上デジタル信号が、ＢＳ・１１０度ＣＳチューナ４２にＢＳ中間周波信号及び１１０度ＣＳ中間周波信号が供給される。 The millimeter wave signal received by the millimeter wave receiving antenna 34 is supplied to receiving means provided in the receiving unit 32, for example, a converter 36, where the original digital terrestrial television broadcast signal, BS intermediate frequency signal, 110 degrees. The frequency is converted into a CS intermediate frequency signal, demultiplexed by the demultiplexer 38, the terrestrial digital signal is provided to the terrestrial digital tuner 40 provided in each room, and the BS intermediate frequency signal 110 and the BS 110 degree CS tuner 42 are provided. A CS intermediate frequency signal is supplied.

この受信ユニット３２は、各ベランダに取り付けられるが、例えばミリ波送信アンテナ２２に近い階に設置されたものでは、例えば上述したビーム角度範囲内に配置すると、受信電界強度が大きくなりすぎ、コンバータ３６に供給される受信信号のレベルも大きくなり、コンバータ３６の出力が飽和してしまい、良好に地上デジタルテレビジョン放送、ＢＳ放送、１１０度ＣＳ放送を受信することができなくなる。 The receiving unit 32 is attached to each veranda. For example, in the case where the receiving unit 32 is installed on the floor close to the millimeter wave transmitting antenna 22, if the receiving unit 32 is disposed within the beam angle range described above, the received electric field strength becomes too large, the converter 36 As a result, the level of the reception signal supplied to the signal increases, the output of the converter 36 is saturated, and it becomes impossible to receive terrestrial digital television broadcast, BS broadcast, and 110 degree CS broadcast.

そこで、各受信ユニット３２のうち、送信ユニット１８付近にあるもの、例えば送信ユニット１８に最も近い１４階に設置されているものから、中途の階、例えば８階にあるものまでのミリ波受信アンテナ３４である第１のミリ波受信アンテナ３４ａは、ミリ波送信アンテナ２２側を向くように設置され、さらに上述したビーム角度範囲±２度の外側に配置されている。具体的には、第１のミリ波受信アンテナ３４ａのうち、送信ユニット１８に接近して位置するものである第３のミリ波受信アンテナ３４ｂ、３４ｂは１４階と１３階とに設置され、上述したビーム角度範囲±４度の範囲の外部に設けられている。但し、ビーム角度範囲±４度のラインに近い位置に配置して、電界強度が極端に小さくなることを防止している。そのため、１４階にあるミリ波受信アンテナ３４ｂは、１３階にあるミリ波受信アンテナ３４ｂよりもビーム中心軸に近い位置に設置されている。このようにミリ波受信アンテナ３４ｂを配置しているので、これらの受信電界強度をほぼ揃えてコンバータ３６の出力が飽和しないレベルとすることができる。ミリ波受信アンテナ３４ｂをコンバータ３６の出力が飽和しないレベルとするために、ミリ波送信アンテナ２２の方向に向けず、少し外側にずらした方向に向けることもできる。 Therefore, among the receiving units 32, millimeter wave receiving antennas from those near the transmitting unit 18, such as those installed on the 14th floor closest to the transmitting unit 18, to those on the middle floor, such as the 8th floor, for example. The first millimeter-wave receiving antenna 34a, which is 34, is disposed so as to face the millimeter-wave transmitting antenna 22, and is further disposed outside the beam angle range of ± 2 degrees described above. Specifically, among the first millimeter wave reception antennas 34a, the third millimeter wave reception antennas 34b and 34b that are located close to the transmission unit 18 are installed on the 14th floor and the 13th floor, and are described above. The beam angle range is provided outside the range of ± 4 degrees. However, it is arranged at a position close to a line with a beam angle range of ± 4 degrees to prevent the electric field strength from becoming extremely small. Therefore, the millimeter wave receiving antenna 34b on the 14th floor is installed at a position closer to the beam center axis than the millimeter wave receiving antenna 34b on the 13th floor. Since the millimeter wave receiving antenna 34b is arranged in this manner, the received electric field strengths can be made substantially uniform so that the output of the converter 36 is not saturated. In order to set the millimeter-wave receiving antenna 34b to a level at which the output of the converter 36 is not saturated, the millimeter-wave receiving antenna 34b can be directed not to the millimeter-wave transmitting antenna 22 but slightly to the outside.

第１のミリ波受信アンテナ３４ａのうち、残りのものである第４のミリ波受信アンテナ３４ｃは、１２階から８階までに配置されており、上述したビーム角度範囲±４度のラインよりも内側で、ビーム角度±２度のラインとの間に配置されている。但し、ビーム中心軸に対する距離を等しくして、例えば８階と９階とに中心軸に対する距離を等しくして受信アンテナを配置しても、ミリ波送信アンテナ２２からの距離が遠いほど電界強度は小さく、例えば８階の方がミリ波送信アンテナ２２より遠いので受信電界強度は小さい。そこで、低い階でも受信電界強度が大きくなるように、ビーム角度範囲±２度のラインに徐々に近づけている。即ち、８階から１２階にある第３のミリ波受信アンテナ３４ｃは、８階から１２階に向かうに従って徐々にビーム中心軸に近づくように配置されている。このように配置しているので、第３のミリ波受信アンテナ３４ｃでの受信レベルをほぼ揃えてコンバータ３６の出力が飽和しないレベルとすることができる。 Among the first millimeter-wave receiving antennas 34a, the remaining fourth millimeter-wave receiving antenna 34c is arranged from the 12th floor to the 8th floor, and is more than the above-mentioned line of the beam angle range ± 4 degrees. Inside, it is arranged between the line with a beam angle of ± 2 degrees. However, even if the receiving antenna is arranged with the same distance to the beam central axis, for example, the eighth floor and the ninth floor with the same distance to the central axis, the electric field strength increases as the distance from the millimeter wave transmitting antenna 22 increases. For example, since the 8th floor is farther than the millimeter wave transmitting antenna 22, the received electric field strength is small. Therefore, the line is gradually brought closer to the line of the beam angle range of ± 2 degrees so that the received electric field strength is increased even at a lower floor. That is, the third millimeter-wave receiving antennas 34c located from the 8th floor to the 12th floor are arranged so as to gradually approach the beam center axis from the 8th floor to the 12th floor. Since it is arranged in this way, the reception levels at the third millimeter-wave receiving antenna 34c can be made substantially uniform so that the output of the converter 36 is not saturated.

また、７階から１階までに配置されているミリ波受信アンテナ３４である第２ミリ波受信アンテナ３４ｄでは、ミリ波送信アンテナ２２から最も遠い位置にある１階の第２ミリ波受信アンテナ３４ｄが、ミリ波送信アンテナ２２とほぼ正対するように配置されている。１階よりも電界強度が徐々に大きくなる２階、３階、４階、５階、６階、７階に設置される第２ミリ波受信アンテナ３４ｄほど、ビーム中心軸から離れた位置に配置されている。但し、いずれもビーム角度±２度の各範囲内に配置されている。このように配置しているので、第２のミリ波受信アンテナ３４ｄの受信レベルをほぼ揃えることができる。無論、コンバータ３６の出力は飽和しない。 Further, in the second millimeter wave receiving antenna 34d that is the millimeter wave receiving antenna 34 arranged from the seventh floor to the first floor, the second millimeter wave receiving antenna 34d on the first floor that is farthest from the millimeter wave transmitting antenna 22 is used. Are arranged so as to face the millimeter-wave transmission antenna 22 substantially. The second millimeter wave receiving antenna 34d installed on the second floor, the third floor, the fourth floor, the fifth floor, the sixth floor, and the seventh floor where the electric field strength gradually becomes larger than the first floor is arranged at a position away from the beam center axis. Has been. However, all of them are arranged within each range of the beam angle ± 2 degrees. Since it arrange | positions in this way, the reception level of the 2nd millimeter wave receiving antenna 34d can be substantially equalized. Of course, the output of the converter 36 is not saturated.

このように第１のミリ波受信アンテナ３４ａ、第２のミリ波受信アンテナ３４ｄを配置しているので、いずれのミリ波受信アンテナでも、良好にミリ波を受信することができる。 Since the first millimeter-wave receiving antenna 34a and the second millimeter-wave receiving antenna 34d are arranged in this manner, any millimeter-wave receiving antenna can receive millimeter waves satisfactorily.

本発明の第２の実施形態のミリ波伝送システムは、図５に示すように中層または低層のマンション２８ａの各部屋に地上デジタルテレビジョン放送信号や、ＢＳ・ＣＳ１１０度信号を伝送しようとする場合のものである。ミリ波送信アンテナ２２及びコンバータ２０を備えた送信ユニット１８は、第１実施形態の送信ユニット１８と同一のもので、第１実施形態の送信ユニット１８と同様に中層または低層マンション２８ａの屋上に配置されている。ミリ波受信アンテナ３４及びコンバータ３６を備える受信ユニット３２も、第１の実施形態の受信ユニット３２と同一のもので、第１実施形態の第２のミリ波受信アンテナ３４ｄと同様に配置されている。即ち、最もミリ波送信アンテナ２２と離れているミリ波受信アンテナ３４は、ミリ波送信アンテナ２２とほぼ正対するように配置され、ミリ波送信アンテナ２２に近づくように上層階になるほど、ビーム中心軸から離れるように配置される。そして、ミリ波送信アンテナ２２に接近したもの、この実施形態では、ミリ波送信アンテナ２２に近い２つの階に設けたものは、２点鎖線で示すビーム角度ラインまたはそれよりも所定の角度、例えば±２度乃至４度だけ開いた角度ラインの外側に位置するように配置されている。このように配置することによって、ミリ波送信アンテナ２２に比較的近く電界強度の大きい階に設置されたミリ波受信アンテナ３４は、その階において最も電界強度の大きい中心軸よりも、電界強度の小さい位置に設置されている。従って、ミリ波送信アンテナ２２に近い位置にあるミリ波受信アンテナ３４での受信信号が供給される受信用のコンバータ３６の出力が飽和することはない。 The millimeter wave transmission system according to the second embodiment of the present invention is to transmit a terrestrial digital television broadcast signal or a BS / CS110 degree signal to each room of a middle or low-rise apartment 28a as shown in FIG. belongs to. The transmission unit 18 including the millimeter-wave transmission antenna 22 and the converter 20 is the same as the transmission unit 18 of the first embodiment, and is arranged on the roof of the middle- or low-rise apartment 28a as with the transmission unit 18 of the first embodiment. Has been. The reception unit 32 including the millimeter wave reception antenna 34 and the converter 36 is also the same as the reception unit 32 of the first embodiment, and is arranged in the same manner as the second millimeter wave reception antenna 34d of the first embodiment. . That is, the millimeter wave receiving antenna 34 that is the farthest from the millimeter wave transmitting antenna 22 is arranged so as to face the millimeter wave transmitting antenna 22 almost, and the beam center axis becomes closer to the upper floor so as to approach the millimeter wave transmitting antenna 22. It is arranged away from. Then, the one close to the millimeter wave transmission antenna 22, in this embodiment, provided on two floors close to the millimeter wave transmission antenna 22, is a beam angle line indicated by a two-dot chain line or a predetermined angle than that, for example, It is arranged so as to be located outside the angle line opened by ± 2 to 4 degrees. By arranging in this manner, the millimeter wave receiving antenna 34 installed on the floor relatively close to the millimeter wave transmitting antenna 22 and having a large electric field strength has a smaller electric field strength than the central axis having the largest electric field strength on that floor. In place. Therefore, the output of the receiving converter 36 to which the reception signal at the millimeter wave reception antenna 34 located near the millimeter wave transmission antenna 22 is supplied does not saturate.

上記の両実施形態では、地上デジタルテレビジョン放送信号やＢＳ・１１０度ＣＳ信号を伝送するためにミリ波信号を使用したが、他の信号を伝送するためにミリ波信号を使用することもできるし、地上デジタルテレビジョン放送信号のみやＢＳ・１１０度ＣＳ信号のみを伝送するためにミリ波信号を使用することもできる。また、上記の両実施形態では、マンションのような１つの高層建築物の各階にミリ波信号を伝送したが、例えば一列に配置された複数の建築物のそれぞれにミリ波信号を伝送する場合にも、本発明を使用することもできる。第１の実施形態では、第２のミリ波受信アンテナ３４ｂを、第２の実施形態ではミリ波送信アンテナ２２に近い２つのミリ波受信アンテナをビーム角度±４度のラインの外側に配置したが、送信用のコンバータ２０の出力電力によってビーム角度±４度のラインの内側に配置することもできる。また、上記の実施形態ではビーム角度±２度とビーム角度±４度の角度ラインを基準としたが、これに限ったものではなく、場合によっては、ビーム角度±１度の角度ラインとビーム角度±３度の角度ラインや、ビーム角度±３度の角度ラインとビーム角度ライン±５度のライン等を基準とすることもできる。上記の第１の実施形態では、第１のミリ波受信アンテナ３４ａは、それぞれ複数の第３のミリ波受信アンテナ３４ｂと第４のミリ波受信アンテナ３４ｃとから構成したが、マンションの高さによっては、第４のミリ波受信アンテナ３４ｃを除去して直ちに第２のミリ波受信アンテナ３４ｄとすることもできるし、また、第３のミリ波受信アンテナ３４ｂを１台だけ設けることも場合によっては可能である。 In both of the above embodiments, a millimeter wave signal is used to transmit a terrestrial digital television broadcast signal or a BS · 110 ° CS signal, but a millimeter wave signal can also be used to transmit other signals. However, it is also possible to use a millimeter wave signal to transmit only a terrestrial digital television broadcast signal or only a BS · 110 ° CS signal. Moreover, in both said embodiment, although the millimeter wave signal was transmitted to each floor of one high-rise building like an apartment, for example, when transmitting a millimeter wave signal to each of the some building arrange | positioned in a line Alternatively, the present invention can be used. In the first embodiment, the second millimeter-wave receiving antenna 34b is arranged outside the line having a beam angle of ± 4 degrees, and in the second embodiment, two millimeter-wave receiving antennas close to the millimeter-wave transmitting antenna 22 are arranged. Depending on the output power of the converter 20 for transmission, it can be arranged inside the line with a beam angle of ± 4 degrees. In the above embodiment, the angle line of the beam angle ± 2 degrees and the beam angle ± 4 degrees is used as a reference. However, the present invention is not limited to this, and in some cases, the angle line and the beam angle of the beam angle ± 1 degree are used. An angle line of ± 3 degrees, an angle line of beam angle ± 3 degrees, a line of beam angle line ± 5 degrees, or the like can be used as a reference. In the first embodiment, each of the first millimeter wave reception antennas 34a is composed of a plurality of third millimeter wave reception antennas 34b and a fourth millimeter wave reception antenna 34c. The fourth millimeter-wave receiving antenna 34c can be removed to immediately become the second millimeter-wave receiving antenna 34d, or only one third millimeter-wave receiving antenna 34b can be provided in some cases. Is possible.

２０コンバータ（送信手段）
２２ミリ波送信アンテナ
３４ａ第１のミリ波受信アンテナ
３４ｂ第３のミリ波受信アンテナ
３４ｃ第４のミリ波受信アンテナ
３４ｄ第２のミリ波受信アンテナ
３６コンバータ（受信手段）
20 Converter (Transmission means)
22 Millimeter wave transmitting antenna 34a First millimeter wave receiving antenna 34b Third millimeter wave receiving antenna 34c Fourth millimeter wave receiving antenna 34d Second millimeter wave receiving antenna 36 Converter (receiving means)

Claims

A millimeter-wave transmitting antenna installed on the roof of a building, which is composed of a plurality of floors and at least two rooms are arranged adjacent to each other, and facing downward.
Millimeter wave transmission means for supplying a millimeter wave signal to the millimeter wave transmission antenna;
A plurality of millimeter wave receiving antennas installed outside the rooms on the floors of the building and facing the millimeter wave transmitting antenna, and receiving the millimeter wave signals transmitted by the millimeter wave transmitting antenna ;
A plurality of millimeter wave receiving means, each of which receives a millimeter wave signal received by each of the millimeter wave receiving antennas and whose output is saturated when the level of the received millimeter wave signal is large,
A first millimeter-wave receiving antenna, which is at least one millimeter-wave receiving antenna on a floor located near the millimeter-wave transmitting antenna among the millimeter-wave receiving antennas, is arranged in an arrangement direction of the two adjacent rooms And a millimeter wave transmission system located outside the beam angle range of the millimeter wave transmission antenna.

2. The millimeter wave transmission system according to claim 1, wherein the second millimeter wave receiving antenna that is the millimeter wave receiving antenna on a floor below the first millimeter wave receiving antenna of the millimeter wave receiving antenna is the adjacent one. The millimeter wave transmission system is located in the beam angle range of the millimeter wave transmission antenna in the arrangement direction of the two rooms .

The millimeter-wave transmission system according to claim 2, wherein the first millimeter-wave receiving antenna is a plurality, and at least one third millimeter-wave receiving antenna on a floor closer to the millimeter-wave transmitting antenna is A fourth millimeter located outside the angle range wider than the beam angle range by a predetermined angle and located on a floor other than the third millimeter-wave reception antenna among the first millimeter-wave reception antennas. The wave receiving antenna is a millimeter wave transmission system located in a portion outside the beam angle range in the wide angle range.

4. The millimeter wave transmission system according to claim 3, wherein there are a plurality of the third millimeter wave receiving antennas, and the closer to the floor closer to the millimeter wave transmitting antenna , the closer to the center axis of the beam of the millimeter wave transmitting antenna. Millimeter wave transmission system.

4. The millimeter wave transmission system according to claim 3, wherein among the second millimeter wave receiving antennas, the one located on the floor farthest from the millimeter wave transmitting antenna is substantially opposite to the millimeter wave transmitting antenna and located on another floor. The millimeter wave transmission system is located closer to the millimeter wave transmission antenna and away from the central axis of the beam of the millimeter wave transmission antenna .

A millimeter-wave transmitting antenna installed on the roof of a building, which is composed of a plurality of floors and at least two rooms are arranged adjacent to each other, and facing downward .
Millimeter wave transmission means for supplying a millimeter wave signal to the millimeter wave transmission antenna ;
A plurality of millimeters installed outside the two rooms adjacent to each other on the plurality of floors of the building so as to face the millimeter wave transmitting antenna and receiving the millimeter wave signal transmitted by the millimeter wave transmitting antenna. A wave receiving antenna,
A plurality of millimeter wave receiving means, each of which receives a millimeter wave signal received by each of the millimeter wave receiving antennas and whose output is saturated when the level of the received millimeter wave signal is large,
A, wherein each of the millimeter wave reception antenna, what is the farthest floor from the transmitting millimeter wave antenna, substantially directly opposite to the millimeter wave transmission antenna, as those in the floor close to the millimeter wave transmitting antenna, the 2 A millimeter wave transmission system arranged apart from the central axis of the beam of the millimeter wave transmitting antenna in the arrangement direction of two rooms .