JP2007096573A - Antenna device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid the same channel fault without using an apparatus for a common-listening system while improving the deterioration of a signal quality. <P>SOLUTION: An antenna device has an existing first UHF antenna 10 receiving a television broadcasting in a plurality of channels in a UHF band, and a second UHF antenna 11 receiving the television broadcasting generating the same channel fault in the UHF band by different channels. The receiving signal of the second UHF antenna 11 is amplified by a preamplifier 12 and supplied to a mixer 13 together with the receiving signal of the first UHF antenna 10. A DC power supply overlapped to a coaxial cable is separated by a power-supply extractor 15 and supplied to the preamplifier 12. Accordingly, the antenna device can be manufactured in which the same channel fault is avoided without using the apparatus for the common-listening system while the deterioration of the signal quality can be prevented by improving a CN ratio (the Carrier to Noise ratio). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a home antenna apparatus that can be used when an analog broadcast channel is changed to secure a digital terrestrial broadcast channel.

A configuration example of a conventional antenna device is shown in FIG.
An antenna device 200 illustrated in FIG. 15 includes an antenna 201 that receives UHF television broadcast or VHF television broadcast, and a television broadcast signal received by the antenna 201 is amplified by an amplifier 202 and supplied to the television receiver 203. . The amplifier 202 is installed indoors, and commercial power (AC 100 V) is supplied from an outlet.
FIG. 16 shows another configuration example of the conventional antenna device.
An antenna device 210 shown in FIG. 16 has an antenna 211 that receives UHF television broadcast or VHF television broadcast, a television broadcast signal received by the antenna 211 is amplified by an amplifier 212, and is received by a television receiver via a power supply unit 213. It supplies to 214. The amplifier 212 is installed outdoors just below the antenna 211, and a DC power supply (DC15V) for operation is supplied from the power supply unit 213 to the amplifier 212 via a signal transmission path such as a coaxial cable through which a television signal is transmitted. ing. A commercial power supply (AC100V) is supplied from a power outlet to the power supply unit 213 installed in the room, and a DC power supply is superimposed from the power supply unit 213 on the signal transmission path connected to the input side terminal. Has been supplied to. A television broadcast signal amplified by the amplifier 212 is output from the output terminal of the power supply unit 213 and supplied to the television receiver 214.

By the way, in order to secure a channel for digital terrestrial broadcasting, a channel change for an analog broadcasting channel is currently being performed in television broadcasting. In this case, depending on the result of the channel change, there is a channel where the same channel failure occurs. For example, as a result of the channel change in the Saitama area, the Kodama station 30ch TV Saitama channel and the Funabashi station Chiba TV digital broadcast 30ch in the Chiba area become the same channel, causing the same channel failure. Become.
As a measure for avoiding the same channel failure, it is conceivable to receive a television broadcast broadcast on the channel from another broadcast station broadcasting on a different channel. In this case, an antenna for receiving a television broadcast from another broadcasting station is added, and a mixer for mixing with a television broadcast reception signal received by an existing antenna is required. In this case, the channel causing the same channel failure is a channel of the channels that can be received by the existing antenna and is a channel of the same frequency band, and the frequency band is not different. It is not possible to use a mixer that mixes together. Since the mixer in this case is a mixer that reversely uses the two distributors, the loss of this mixer (theoretically a loss of 3 dB, but since a circuit loss is added, a loss of about 4 dB or more is added. Therefore, there is a problem that the signal quality (CN ratio: Carrier to Noise ratio) deteriorates.

  Also, in the antenna device that was designed to mix multi-directional reception with a mixer that uses a filter, when taking measures to avoid receiving the same channel failure from other broadcast stations that are broadcasting on different channels, In some cases, a mixer using a filter cannot be used. That is, the channel causing the same channel failure is a channel in the frequency band received by one antenna in multi-directional reception, and the frequency band is not different. Can no longer be used. In this case, as described above, a mixer that reversely uses the two distributors is used. However, since the loss of this mixer is larger than that of the mixer that uses the filter as described above, the signal quality is reduced. Will deteriorate.

In order to solve this problem, it is conceivable to insert an amplifier before the mixer that uses the two distributors in reverse to compensate for the loss of the mixer. However, this type of amplifier does not exist for home use. In order to improve the signal quality, it was necessary to use a device for a common hearing system. However, since the specifications of the device for the common hearing system are different from those for home use, the existing antenna device cannot be used, and a new antenna device must be constructed, resulting in an expensive antenna device. There was a problem.
SUMMARY OF THE INVENTION An object of the present invention is to provide an antenna device that can avoid co-channel failure without using a device for a hearing system and can improve signal quality degradation.

  In order to achieve the above object, an antenna apparatus of the present invention includes a preamplifier that amplifies a reception signal received by a second directional antenna, and is supplied while being superimposed on a signal transmission path connected to an output side. A DC output is separated and supplied to the preamplifier, and a mixed output of the mixer that mixes the output of the first directional antenna and the preamplifier by superimposing the separated DC power supply on the signal transmission path connected to the input side. The main feature is that a power extractor for supplying DC power is provided to a booster that amplifies the power.

  According to the present invention, the preamplifier for amplifying the received signal received by the second directional antenna is provided, and the DC power supplied in a superimposed manner on the signal transmission path connected to the output side is separated and supplied to the preamplifier. In addition, the DC power supply is supplied to the booster that amplifies the mixed output of the mixer that mixes the output of the first directional antenna and the preamplifier by superimposing the separated DC power supply on the signal transmission line connected to the input side. Since a power extractor is provided, it is possible to avoid co-channel failure without using a device for a common hearing system, and to improve the CN ratio (Carrier to Noise ratio) to prevent signal quality deterioration. It becomes possible to provide an antenna device capable of performing the above.

The configuration of the antenna device according to the first embodiment of the present invention is shown in FIG. The antenna apparatus according to the first embodiment is an antenna apparatus in which a countermeasure against the same channel failure is taken in the conventional antenna apparatus shown in FIG.
The antenna device 1 of the first embodiment shown in FIG. 1 is different from the existing first UHF antenna 10 that receives television broadcasts of a plurality of channels in the UHF band, and the television broadcast that causes the same channel failure in the UHF band. And a second UHF antenna 11 for receiving on the channel. The first UHF antenna 10 and the second UHF antenna 11 are directional antennas such as Yagi antennas, and the first UHF antenna 10 is directed to the first television broadcasting station. The antenna 11 is directed to a second television broadcasting station that transmits a television broadcast of a different channel that does not cause the same channel failure.

  The reception signal of the second UHF antenna 11 is amplified by the preamplifier 12 and supplied to the mixer 13 together with the reception signal of the first UHF antenna 10. The mixer 13 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The preamplifier 12 is provided outdoors just below the second UHF antenna 11 in order to compensate for the loss of the mixer 13. From the mixer 13, the reception signal of the first UHF antenna 10 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 11 has not occurred are mixed and output. This mixed output is supplied to the existing booster 14, amplified, and supplied to the power extractor 15. The power extractor 15 is connected to the existing power supply unit 16 through a signal transmission line, and sends the mixed signal output from the existing booster 14 to the existing power supply unit 16 and is superimposed on the signal transmission line to be added to the existing power supply unit 16. The DC power supplied from the unit 16 (for example, DC 15V) is separated, and the separated DC power is supplied to the preamplifier 12 by providing a dedicated feeding line for the preamplifier 12. Further, the DC power is supplied to the existing booster 14 by superimposing and outputting the DC power on the signal transmission line connecting the existing booster 14 and the power extractor 15. Since a coaxial cable is generally used as the signal transmission path, the signal transmission path is referred to as a coaxial cable in the following description.

The existing power supply unit 16 is connected to the power extractor 15 through a coaxial cable, and supplies the mixed signal supplied from the coaxial cable to the television receiver (TV) 17 through the coaxial cable. Since the TV 17 is supplied with the TV signal without the same channel failure received by the second UHF antenna 11 in addition to the television signals of the plurality of channels received by the first UHF antenna 10, It is possible to view a screen on which no occurrence occurs. Note that, between the first UHF antenna 10 and the mixer 13, between the second UHF antenna 11 and the preamplifier 12, between the preamplifier 12 and the mixer 13, and between the mixer 13 and the existing booster 14. Are also connected by a coaxial cable. Moreover, the 1st UHF antenna 10, the 2nd UHF antenna 11, the preamplifier 12, the mixer 13, the existing booster 14, and the power supply extractor 15 are attached to the pole installed outdoors. In this case, two poles may be used. Further, the existing power supply unit 16 is installed in the room, and a plug provided at the end of the power cord extended from the power supply unit 16 is inserted into an indoor outlet so that commercial power (AC 100 V) is supplied to the power supply unit 16. Yes.
According to such a configuration, the loss of the mixer 13 can be compensated for by the preamplifier 12, and a DC power can be supplied to the preamplifier 12 by the power extractor 15. Therefore, a device for a hearing system is used. Thus, it is possible to provide an antenna device that can avoid a co-channel failure and improve a CN ratio (Carrier to Noise ratio) to prevent signal quality degradation.

The configuration of the antenna device according to the second embodiment of the present invention is shown in FIG. The antenna device of the second embodiment is an antenna device in which a countermeasure against the same channel failure is taken in the conventional antenna device shown in FIG.
The antenna device 2 of the second embodiment shown in FIG. 2 is different from the existing first UHF antenna 20 that receives television broadcasts of a plurality of channels in the UHF band, and the television broadcast that causes the same channel failure in the UHF band. And a second UHF antenna 21 that receives the channel. The first UHF antenna 20 and the second UHF antenna 21 are directional antennas such as Yagi antennas, and the first UHF antenna 20 is directed to the first television broadcasting station. The antenna 21 is directed to a second television broadcasting station that transmits a television broadcast of a different channel that does not cause the same channel failure.

  The reception signal of the first UHF antenna 21 is amplified by the first preamplifier 22a and supplied to the mixer 23, and the reception signal of the second UHF antenna 21 is amplified by the second preamplifier 22b and mixed. 23. The mixer 23 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The first preamplifier 22a and the second preamplifier 22b are provided outdoors directly below the first UHF antenna 20 and directly below the second UHF antenna 21 in order to compensate for the loss of the mixer 23. . From the mixer 23, the reception signal of the first UHF antenna 20 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 21 has not occurred are mixed and output. This mixed output is supplied to an existing booster 24, amplified, and supplied to a power extractor 25. The power extractor 25 sends the mixed signal output from the existing booster 24 to the existing power supply unit 26 and separates the DC power supply (for example, DC15V) supplied from the existing power supply unit 26 by being superimposed on the coaxial cable. Thus, the separated DC power supply is provided with power supply lines dedicated to the first preamplifier 22a and the second preamplifier 22b, and supplies power to the first preamplifier 22a and the second preamplifier 22b, respectively. Further, the power extractor 15 supplies the DC power to the existing booster 24 by superimposing and outputting the DC power on the coaxial cable connecting the existing booster 24 and the power extractor 25.

The existing power supply unit 26 is connected to the power extractor 25 by a coaxial cable, and supplies the mixed signal supplied by the coaxial cable to the television receiver (TV) 27 via the coaxial cable. In addition to the TV signals of a plurality of channels received by the UHF antenna 20, the TV 27 is supplied with a TV signal that has been received by the UHF antenna 21 and has not suffered the same channel failure. You can watch it. Note that, between the first UHF antenna 20 and the first preamplifier 22a, between the first preamplifier 22a and the mixer 23, between the second UHF antenna 21 and the second preamplifier 22b, the second A coaxial cable is also connected between the preamplifier 22b and the mixer 23, and between the mixer 23 and the existing booster 24. Further, the first UHF antenna 20, the second UHF antenna 21, the first preamplifier 22a, the second preamplifier 22b, the mixer 23, the existing booster 24, and the power extractor 25 are: It can be attached to a pole installed outdoors. In this case, a plurality of poles may be used. Further, the existing power supply unit 26 is installed in the room, and a plug provided at the end of the power cord extended from the power supply unit 26 is inserted into an indoor outlet so that commercial power (AC 100 V) is supplied to the power supply unit 26. According to such a configuration, the loss of the mixer 23 can be compensated by the first preamplifier 22a and the second preamplifier 22b, and the first preamplifier 22a and the second preamplifier 22b can be compensated by the power supply extractor 25. DC power can be supplied to the TV so that it is possible to avoid co-channel failure without using a device for a hearing system and to improve the CN ratio (Carrier to Noise ratio) to prevent signal quality deterioration. The antenna device can be made.

The configuration of the antenna device according to the third embodiment of the present invention is shown in FIG. The antenna device of the third embodiment is an antenna device in which a countermeasure against the same channel failure is taken in the conventional antenna device shown in FIG.
The antenna device 3 according to the third embodiment shown in FIG. 3 is different from the existing first UHF antenna 30 that receives television broadcasts of a plurality of channels in the UHF band, and the television broadcast that causes the same channel failure in the UHF band. And a second UHF antenna 31 for receiving on the channel. The first UHF antenna 30 and the second UHF antenna 31 are directional antennas such as Yagi antennas, and the first UHF antenna 30 is directed to the first television broadcasting station. The antenna 31 is directed to a second television broadcasting station that transmits a television broadcast of a different channel that does not cause the same channel failure.

  The reception signal of the second UHF antenna 31 is amplified by the preamplifier 32 and supplied to the mixer 33 together with the reception signal of the first UHF antenna 30. The mixer 33 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The preamplifier 32 is provided outdoors, which is directly below the second UHF antenna 31, in order to compensate for the loss of the mixer 33. From the mixer 33, the reception signal of the first UHF antenna 30 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 31 does not occur are mixed and output. The mixed output is supplied to the booster 34, amplified, and supplied to the power supply unit 36 via a coaxial cable. The power supply unit 36 sends out a DC power supply (for example, DC15V) superimposed on a coaxial cable connected to the input side, and this DC power supply is supplied to the booster 34. The booster 34 operates with the supplied DC power supply and sends the DC power supply superimposed on a coaxial cable connected to the mixer 33 on the input side. The mixer 33 is provided with a conduction circuit capable of superimposing a DC power received from the coaxial cable connected to the output side on the coaxial cable to which the input side preamplifier 32 is connected. DC power is supplied to the preamplifier 32 via the circuit and the coaxial cable.

The power supply unit 36 supplies the mixed signal supplied from the booster 34 via the coaxial cable to the television receiver (TV) 37 via the coaxial cable. The TV 37 is supplied with the TV signal without the same channel failure received by the second UHF antenna 31 in addition to the television signals of the plurality of channels received by the first UHF antenna 30. It is possible to view a screen on which no occurrence occurs. The first UHF antenna 30 and the mixer 33, the second UHF antenna 31 and the preamplifier 32, and the preamplifier 32 and the mixer 33 are also connected by a coaxial cable. Moreover, the 1st UHF antenna 30, the 2nd UHF antenna 31, the preamplifier 32, the mixer 33, and the booster 34 are attached to the pole installed outdoors. In this case, a plurality of poles may be used. Furthermore, the power supply unit 36 is installed indoors, and a plug provided at the tip of a power cord extended from the power supply unit 36 is inserted into an indoor outlet, and commercial power (AC 100 V) is supplied to the power supply unit 36.
According to such a configuration, the loss of the mixer 33 can be compensated by the preamplifier 32, and a DC power supply can be supplied to the preamplifier 32 by the power supply unit 36. In addition, it is possible to provide an antenna device that can avoid a co-channel failure and improve a CN ratio (Carrier to Noise ratio) to prevent signal quality deterioration.

The configuration of the antenna device according to the fourth embodiment of the present invention is shown in FIG. The antenna device of the fourth embodiment is an antenna device in which a countermeasure against the same channel failure is taken in the conventional antenna device shown in FIG.
The antenna device 4 of the fourth embodiment shown in FIG. 4 is different from the existing first UHF antenna 40 that receives television broadcasts of a plurality of channels in the UHF band, and the television broadcast that causes the same channel failure in the UHF band. And a second UHF antenna 41 for receiving on the channel. The first UHF antenna 40 and the second UHF antenna 41 are directional antennas such as a Yagi antenna, and the first UHF antenna 40 is directed to the first television broadcasting station. The antenna 41 is directed to a second television broadcasting station that transmits television broadcasting on different channels that do not cause the same channel failure.

  The reception signal of the first UHF antenna 41 is amplified by the first preamplifier 42a and supplied to the mixer 43, and the reception signal of the second UHF antenna 41 is amplified by the second preamplifier 42b and mixed. 43. The mixer 43 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The first preamplifier 42a and the second preamplifier 42b are provided outdoors directly below the first UHF antenna 40 and directly below the second UHF antenna 41 in order to compensate for the loss of the mixer 43. Yes. From the mixer 43, the reception signal of the first UHF antenna 40 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 41 does not occur are mixed and output. This mixed output is supplied to an existing booster 44, amplified, and supplied to a power supply unit 46 via a coaxial cable. The power supply unit 46 sends out a DC power supply (for example, DC 15 V) superimposed on a coaxial cable connected to the input side, and this DC power supply is supplied to the booster 44. The booster 44 operates with the supplied DC power supply and sends the DC power supply superimposed on a coaxial cable connected to the mixer 43 on the input side. In the mixer 43, the DC power received from the terminal on the output side can be sent out superimposed on two coaxial cables to which the first preamplifier 42a and the second preamplifier 42b on the input side are respectively connected. A circuit is added, and DC power is supplied to the first preamplifier 42a and the second preamplifier 42b through this electrical communication circuit.

The power supply unit 46 supplies the mixed signal supplied from the booster 44 via the coaxial cable to the television receiver (TV) 47 via the coaxial cable. The TV 47 is supplied with a TV signal without the same channel failure received by the second UHF antenna 41 in addition to the television signals of a plurality of channels received by the first UHF antenna 40. It is possible to view a screen on which no occurrence occurs. Note that, between the first UHF antenna 40 and the first preamplifier 42a, between the first preamplifier 42a and the mixer 43, between the second UHF antenna 41 and the second preamplifier 42b, the second The preamplifier 42b and the mixer 43 are also connected by a coaxial cable. In addition, the first UHF antenna 40, the second UHF antenna 41, the first preamplifier 42a and the second preamplifier 42b, the mixer 43, and the booster 44 are attached to poles installed outdoors. . In this case, a plurality of poles may be used. Further, the power supply unit 46 is installed indoors, and a plug provided at the tip of a power cord extended from the power supply unit 46 is inserted into an indoor outlet so that commercial power (AC 100 V) is supplied to the power supply unit 46.
According to such a configuration, the loss of the mixer 43 can be compensated by the first preamplifier 42a and the second preamplifier 42b, and direct current is supplied to the first preamplifier 42a and the second preamplifier 42b by the power supply unit 46. Since the power can be supplied, an antenna that can avoid co-channel failure without using a device for a hearing system and can improve the CN ratio (Carrier to Noise ratio) to prevent signal quality deterioration. It can be a device.

The configuration of the antenna device according to the fifth embodiment of the present invention is shown in FIG. The antenna device according to the fifth embodiment is an antenna device that is provided with a countermeasure against the same channel failure in an antenna device that includes a conventional VHF antenna and a UHF antenna.
The antenna device 5 of the fifth embodiment shown in FIG. 5 includes an existing VHF antenna 50 that receives television broadcasts of a plurality of channels in the VHF band, and an existing first antenna that receives television broadcasts of a plurality of channels in the UHF band. There is provided a UHF antenna 51 and a second UHF antenna 52 for receiving a television broadcast in which the same channel failure has occurred in the UHF band on different channels. The VHF antenna 50, the first UHF antenna 51, and the second UHF antenna 52 are directional antennas such as Yagi antennas, and the VHF antenna 50 is directed to the VHF television broadcasting station. The first UHF antenna 51 is directed to the first television broadcast station, and the second UHF antenna 52 is directed to the second television broadcast station that is transmitting the television broadcast on a different channel that does not cause the same channel failure.

  The reception signal of the second UHF antenna 52 is amplified by the preamplifier 53 and supplied to the mixer 54 together with the reception signal of the first UHF antenna 51. The mixer 54 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The preamplifier 53 is provided outdoors that is directly below the second UHF antenna 52 in order to compensate for the loss of the mixer 54. From the mixer 54, the reception signal of the first UHF antenna 51 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 52 has not occurred are mixed and output. The mixed output is supplied to the existing U / V booster 55 together with the reception signal of the VHF antenna 50, and is amplified, mixed, and output. This mixed output is supplied to the power extractor 56 via a coaxial cable. The power supply extractor 56 sends the mixed signal output from the existing U / V booster 55 to the existing power supply unit 57 and also supplies the DC power supplied from the existing power supply unit 57 so as to be superimposed on the signal transmission path on the input side. (For example, DC15V) is separated, and the separated direct current power source is supplied to the preamplifier 53 by providing a dedicated power supply line for the preamplifier 53. Further, a DC power supply is superimposed on the coaxial cable connecting the existing U / V booster 55 and the power extractor 56 and output from the power extractor 56, so that a DC power supply is supplied to the existing U / V booster 55. Supply.

The existing power supply unit 57 is connected to the power extractor 56 through a coaxial cable, and supplies the mixed signal supplied from the coaxial cable to the television receiver (TV) 58 via the coaxial cable. In addition to a plurality of channels of television signals received by the VHF antenna 50 and the first UHF antenna 51, the TV 58 is supplied with a television signal that has been received by the second UHF antenna 52 and has no co-channel failure. Therefore, it becomes possible to view a screen on which no failure has occurred. Note that, between the VHF antenna 50 and the existing U / V booster 55, between the first UHF antenna 51 and the mixer 54, between the second UHF antenna 52 and the preamplifier 53, and between the preamplifier 53 and the mixer 54. Between the mixer 54 and the existing booster 55 is also connected by a coaxial cable. Further, the VHF antenna 50, the first UHF antenna 51, the second UHF antenna 52, the preamplifier 53, the mixer 54, the existing U / V booster 55, and the power extractor 56 are outdoors. It can be attached to the installed pole. In this case, a plurality of poles may be used. Further, the existing power supply unit 57 is installed indoors, and a plug provided at the tip of the power cord extended from the power supply unit 57 is inserted into an indoor outlet so that commercial power (AC 100 V) is supplied to the power supply unit 57. Yes.
According to such a configuration, the loss of the mixer 54 can be compensated for by the preamplifier 53, and the DC power can be supplied to the preamplifier 53 by the power extractor 56, so that the device for the hearing system is used. Thus, it is possible to provide an antenna device that can avoid a co-channel failure and improve a CN ratio (Carrier to Noise ratio) to prevent signal quality degradation.

The configuration of the antenna device according to the sixth embodiment of the present invention is shown in FIG. The antenna device according to the sixth embodiment is an antenna device that is provided with a countermeasure against the same channel failure in a conventional antenna device that includes a VHF antenna, a UHF antenna, and a BS antenna.
The antenna device 6 of the sixth embodiment shown in FIG. 6 includes an existing VHF antenna 60 that receives television broadcasts of a plurality of channels in the VHF band, and an existing first antenna that receives television broadcasts of a plurality of channels in the UHF band. There is provided a UHF antenna 61, a second UHF antenna 62 for receiving a television broadcast in which the same channel failure has occurred in the UHF band on different channels, and a BS antenna 63 for receiving a BS satellite broadcast. The VHF antenna 60, the first UHF antenna 61, and the second UHF antenna 62 are directional antennas such as a Yagi antenna. The VHF antenna 60 is directed to a VHF television broadcasting station, and the first UHF antenna 61 is directed to the first television broadcast station, and the second UHF antenna 62 is directed to the second television broadcast station that is transmitting the television broadcast on a different channel that does not cause the same channel failure. The BS antenna 63 is a parabolic antenna and is directed to the BS broadcasting satellite.

  The reception signal of the second UHF antenna 62 is amplified by the preamplifier 64 and supplied to the mixer 65 together with the reception signal of the first UHF antenna 61. The mixer 65 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The preamplifier 64 is provided outdoors, which is directly below the second UHF antenna 62, to compensate for the loss of the mixer 65. From the mixer 65, the reception signal of the first UHF antenna 61 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 62 does not occur are mixed and output. The mixed output is supplied to the existing U / V / BS booster 66 together with the reception signal of the VHF antenna 60 and the reception signal of the BS antenna 63, and is amplified, mixed, and output. This mixed output is supplied to the power extractor 67 via a coaxial cable. The power supply extractor 67 sends the mixed signal output from the existing U / V / BS booster 66 to the existing power supply unit 68 and is output from the existing power supply unit 68 superimposed on the signal transmission path on the input side. A direct current power source (for example, DC 15 V) is separated, and the separated direct current power source is fed to the preamplifier 64 by providing a dedicated power supply line for the preamplifier 64. Furthermore, the DC power supply is superimposed on the coaxial cable connecting the existing U / V / BS booster 66 and the power extractor 67 and output, thereby providing the existing U / V / BS booster. DC power is supplied to 66. The existing U / V / BS booster 66 operates with the supplied DC power supply, and sends the DC power supply superimposed on a coaxial cable connected to the BS antenna 63 on the input side. As a result, the BS antenna 63 operates with a DC power supplied via the coaxial cable.

The existing power supply unit 68 is connected to the power extractor 67 through a coaxial cable, and supplies the mixed signal supplied from the coaxial cable to the television receiver (TV) 69 via the coaxial cable. In addition to the TV signals of a plurality of channels received by the VHF antenna 60 and the first UHF antenna 61, the TV 69 includes a TV signal which is received by the second UHF antenna 62 and has no co-channel failure, and a BS. Since the television signal received by the antenna 63 is supplied, it is possible to view a screen without any failure. In addition, between the VHF antenna 60 and the existing U / V / BS booster 66, between the first UHF antenna 61 and the mixer 65, between the second UHF antenna 62 and the preamplifier 64, and mixed with the preamplifier 64. A coaxial cable is also connected between the mixer 65, the mixer 65 and the existing U / V / BS booster 66, and the BS antenna 63 and the existing U / V / BS booster 66. Also, the VHF antenna 60, the first UHF antenna 61, the second UHF antenna 62, the BS antenna 63, the preamplifier 64, the mixer 65, the existing U · V · BS booster 66, and the power source extraction The device 67 is attached to a pole installed outdoors. In this case, a plurality of poles may be used. Further, the existing power supply unit 68 is installed in the room, and a plug provided at the tip of the power cord extended from the power supply unit 68 is inserted into an indoor outlet so that commercial power (AC 100 V) is supplied to the power supply unit 68. Yes.
According to such a configuration, the loss of the mixer 65 can be compensated by the preamplifier 64, and the DC power can be supplied to the preamplifier 64 by the power extractor 67, so that the device for the hearing system is used. Thus, it is possible to provide an antenna device that can avoid a co-channel failure and improve a CN ratio (Carrier to Noise ratio) to prevent signal quality degradation.

The configuration of the antenna device according to the seventh embodiment of the present invention is shown in FIG. The antenna device according to the seventh embodiment is an antenna device provided with a countermeasure against the same channel failure in an antenna device including a conventional VHF antenna and a UHF antenna.
The antenna device 7 of the seventh embodiment shown in FIG. 7 includes an existing VHF antenna 70 that receives television broadcasts of a plurality of channels in the VHF band, and an existing first antenna that receives television broadcasts of a plurality of channels in the UHF band. There is provided a UHF antenna 71 and a second UHF antenna 72 for receiving a television broadcast in which the same channel failure has occurred in the UHF band on different channels. The VHF antenna 70, the first UHF antenna 71, and the second UHF antenna 72 are directional antennas such as Yagi antennas, and the VHF antenna 70 is directed to the VHF television broadcasting station. The first UHF antenna 71 is directed to the first television broadcast station, and the second UHF antenna 72 is directed to the second television broadcast station transmitting the television broadcast on a different channel that does not cause the same channel failure.

  The reception signal of the second UHF antenna 72 is amplified by the preamplifier 73 and supplied to the mixer 74 together with the reception signal of the first UHF antenna 71. The mixer 74 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The preamplifier 73 is provided outside the second UHF antenna 72 to compensate for the loss of the mixer 74. From the mixer 74, the reception signal of the first UHF antenna 71 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 72 has not occurred are mixed and output. The mixed output is supplied to the existing U / V booster 75 together with the reception signal of the VHF antenna 70, and is amplified, mixed, and output. This mixed output is supplied to the power supply unit 77 via a coaxial cable. The power supply unit 77 sends a DC power supply (for example, DC15V) superimposed on a coaxial cable connected to the input side, and this DC power supply is supplied to the U / V booster 75. The U / V booster 75 operates with the supplied DC power supply, and sends this DC power supply superimposed on a coaxial cable connected to the mixer 74 on the input side. The mixer 74 is provided with a conduction circuit capable of superimposing the DC power received from the output terminal on the coaxial cable to which the input preamplifier 73 is connected and sending it out. The DC power is supplied to the preamplifier 73 via the.

The power supply unit 77 supplies the mixed signal supplied from the U / V booster 75 via the coaxial cable to the television receiver (TV) 78 via the coaxial cable. In addition to the TV signals of a plurality of channels received by the VHF antenna 70 and the first UHF antenna 71, the TV 78 is supplied with a TV signal which is received by the second UHF antenna 72 and has no co-channel failure. Therefore, it becomes possible to view a screen on which no failure has occurred. In addition, between the VHF antenna 70 and the U / V booster 75, between the first UHF antenna 71 and the mixer 74, between the second UHF antenna 72 and the preamplifier 73, between the preamplifier 73 and the mixer 74. The mixer 74 and the U / V booster 75 are also connected by a coaxial cable. The VHF antenna 70, the first UHF antenna 71, the second UHF antenna 72, the preamplifier 73, the mixer 74, and the U / V booster 75 are attached to a pole installed outdoors. In this case, a plurality of poles may be used. Further, the existing power supply unit 77 is installed in the room, and a plug provided at the end of the power cord extended from the power supply unit 77 is inserted into an indoor outlet so that commercial power (AC100V) is supplied to the power supply unit 77. Yes.
According to such a configuration, the loss of the mixer 74 can be compensated for by the preamplifier 73, and the DC power can be supplied to the preamplifier 73 by the power supply unit 77. In addition, it is possible to provide an antenna device that can avoid a co-channel failure and improve a CN ratio (Carrier to Noise ratio) to prevent signal quality deterioration.

The configuration of the antenna device according to the eighth embodiment of the present invention is shown in FIG. The antenna apparatus according to the eighth embodiment is an antenna apparatus that is provided with a countermeasure against the same channel failure in an antenna apparatus that includes a conventional VHF antenna, UHF antenna, and BS antenna.
The antenna device 8 of the eighth embodiment shown in FIG. 8 includes an existing VHF antenna 80 that receives television broadcasts of a plurality of channels in the VHF band and an existing first antenna that receives television broadcasts of a plurality of channels in the UHF band. A UHF antenna 81, a second UHF antenna 82 that receives a television broadcast in which the same channel failure has occurred in the UHF band on different channels, and a BS antenna 83 that receives a BS satellite broadcast are provided. The VHF antenna 80, the first UHF antenna 81, and the second UHF antenna 82 are directional antennas such as a Yagi antenna, and the VHF antenna 80 is directed to the VHF television broadcasting station. The first UHF antenna 81 is directed to the first television broadcast station, and the second UHF antenna 82 is directed to the second television broadcast station that is transmitting the television broadcast on a different channel that does not cause the same channel failure. The BS antenna 83 is a parabolic antenna and is directed to the BS broadcasting satellite.

  The reception signal of the second UHF antenna 82 is amplified by the preamplifier 84 and supplied to the mixer 85 together with the reception signal of the first UHF antenna 81. The mixer 85 is a mixer that does not use a filter, that is, a mixer that uses two distributors in reverse. The preamplifier 84 is provided outside the second UHF antenna 82 in order to compensate for the loss of the mixer 85. From the mixer 85, the reception signal of the first UHF antenna 81 and the reception signal of the television broadcast in which the same channel failure of the second UHF antenna 82 has not occurred are mixed and output. The mixed output is supplied to the U / V / BS booster 86 together with the reception signal of the VHF antenna 80 and the reception signal of the BS antenna 83, and is amplified, mixed, and output. This mixed output is supplied to the power supply unit 87 via a coaxial cable. The power supply unit 87 sends a DC power supply (for example, DC15V) superimposed on a coaxial cable connected to the input terminal, and this DC power supply is supplied to the U / V / BS booster 86. The U / V / BS booster 86 operates with the supplied DC power supply, and sends the DC power supply superimposed on a coaxial cable connected to the mixer 85 on the input side. The mixer 85 is provided with a conduction circuit that can send a DC power received from the coaxial cable connected to the output side superimposed on the coaxial cable connected to the preamplifier 84 on the input side. Direct current power is supplied to the preamplifier 84 via the electrical communication circuit. The U / V / BS booster 86 superimposes on a coaxial cable connected to the BS antenna 83 on the input side to send out a DC power supply. As a result, the BS antenna 83 operates with a DC power supplied via the coaxial cable.

The power supply unit 87 supplies the mixed signal supplied from the U / V / BS booster 86 via the coaxial cable to the television receiver (TV) 88 via the coaxial cable. In addition to the television signals of a plurality of channels received by the VHF antenna 80 and the first UHF antenna 81, the TV 88 includes a television signal which is received by the second UHF antenna 82 and has no co-channel failure, and a BS. Since the television signal received by the antenna 83 is supplied, it is possible to view a screen without any failure. Note that, between the VHF antenna 80 and the U / V / BS booster 86, between the first UHF antenna 81 and the mixer 85, between the second UHF antenna 82 and the preamplifier 84, and between the preamplifier 84 and the mixer 85. Between the mixer 85 and the existing U / V / BS booster 86 and between the BS antenna 83 and the existing U / V / BS booster 86 are also connected by a coaxial cable. The VHF antenna 80, the first UHF antenna 81, the second UHF antenna 82, the BS antenna 83, the preamplifier 84, the mixer 85, and the existing U / V / BS booster 86 are outdoors. It is attached to the pole installed in In this case, a plurality of poles may be used. Further, the existing power supply unit 87 is installed indoors, and a plug provided at the tip of the power cord extended from the power supply unit 87 is inserted into an indoor outlet so that commercial power (AC 100 V) is supplied to the power supply unit 87. Yes.
According to such a configuration, the loss of the mixer 85 can be compensated for by the preamplifier 84, and the DC power can be supplied to the preamplifier 84 by the power supply unit 87. In addition, it is possible to provide an antenna device that can avoid a co-channel failure and improve a CN ratio (Carrier to Noise ratio) to prevent signal quality deterioration.

Next, FIG. 9 shows a circuit diagram showing the configuration of the power extractor used in the first, second, fifth, and sixth embodiments of the present invention.
The power extractor 100 shown in FIG. 9 is provided with an input terminal IN, an output terminal OUT, and a first power output terminal PW OUT1, so that a second power output terminal PW OUT2 can be provided if necessary. Has been. The input terminal IN is connected to the booster by a coaxial cable, and the mixed signal amplified by the booster is supplied to the input terminal IN. Since the mixed signal supplied to the input terminal IN is a high-frequency signal, it passes through the capacitor C1 and is output from the output terminal OUT, and is prevented from passing through the choke coil L1 and the choke coil L2. Further, the output terminal OUT is connected to the power supply unit by a coaxial cable, and the DC power output superimposed on the coaxial cable in the power supply unit and output is supplied to the output terminal OUT. Although this DC power supply is blocked by the capacitor C1, it passes through the choke coil L2, passes through the choke coil L3, and is output from the first power supply output terminal PWOUT1.

Further, when the second power output terminal PW OUT2 is provided as necessary, the DC power that has passed through the choke coil L2 and further passed through the choke coil L3 is output from the second power output terminal PW OUT2. The The DC power thus separated is supplied to the preamplifier via a feed line connected to the first power output terminal PW OUT1. Further, when the second power output terminal PW OUT2 is provided as necessary, the separated DC power source is connected to the second preamplifier via the power supply line connected to the second power output terminal PW OUT2. Supplied.
Furthermore, the DC power source separated by the capacitor C1 and the choke coil L2 passes through the choke coil L1 and is output by being superimposed on the coaxial cable from the input terminal IN. This DC power source is connected to the power extractor 100 by the coaxial cable. The booster is supplied as operating power. The capacitor C2 is a bypass capacitor that grounds leakage components and the like.

FIG. 10 is a circuit diagram showing a first configuration example of the preamplifier used in the first to eighth embodiments of the present invention.
A preamplifier 110 shown in FIG. 10 has an input terminal IN, an output terminal OUT, and a power supply input terminal PWIN. The preamplifier 110 is operated by a DC power supplied to the power input terminal PWIN via a dedicated power supply line, and is also operated by a DC power supplied to the output terminal OUT. The input terminal IN of the preamplifier 110 is connected to a UHF antenna via a coaxial cable, and a reception signal of the UHF antenna is input to the preamplifier 110. The reception signal input to the input terminal IN of the preamplifier 110 is freed from unnecessary wave components by a band pass filter (BPF) 111 and amplified by an amplifier (AMP) 112. The amplified received signal is adjusted to a predetermined level by a gain control (GC) circuit, and is output from the output terminal OUT through the BPF 113.

  A coaxial cable connected to the mixer is connected to the output terminal OUT, and the reception signal output from the preamplifier 110 is supplied to the mixer via this coaxial cable. The DC power supplied to the power input terminal PWIN is supplied to the amplifier 112 as the operating power via the diode D1. In this case, the DC power source that has passed through the diode D1 is blocked by the diode D2, and therefore is not output from the output terminal OUT. Further, the DC power supplied to the preamplifier 110 while being superimposed on the coaxial cable connected to the output terminal OUT passes through the choke coil L10, further passes through the diode D2, and is supplied to the amplifier 112 as operating power. In this case, since the DC power that has passed through the diode D2 is blocked by the diode D1, it is not output from the power input terminal PWIN. Capacitor C10 is a bypass capacitor that grounds leakage components and the like.

Next, FIG. 11 is a circuit diagram showing a second configuration example of the preamplifier used in the first to eighth embodiments of the present invention.
A preamplifier 120 shown in FIG. 11 has an input terminal IN, an output terminal OUT, and a power supply input terminal PWIN. The preamplifier 120 is operated by a DC power supplied to the power input terminal PWIN via a dedicated power supply line, and is also operated by a DC power supplied to the output terminal OUT. The input terminal IN of the preamplifier 120 is connected to the UHF antenna via a coaxial cable, and a reception signal of the UHF antenna is input to the preamplifier 120. The reception signal input to the input terminal IN of the preamplifier 120 has its unnecessary wave component removed by a band pass filter (BPF) 121 and amplified by an amplifier (AMP) 122. The amplified received signal is adjusted to a predetermined level by a gain control (GC) circuit, and is output from the output terminal OUT through the BPF 123.

  A coaxial cable connected to the mixer is connected to the output terminal OUT, and the reception signal output from the preamplifier 120 is supplied to the mixer via this coaxial cable. The DC power supplied to the power input terminal PWIN is supplied to the second fixed contact c of the switch SW. In this case, by switching the movable contact a to the second fixed contact c side, DC power is supplied as operating power to the amplifier 122 via the second fixed contact c and the movable contact a. Further, when DC power is supplied to the preamplifier 120 while being superimposed on the coaxial cable connected to the output terminal OUT, the movable contact a of the switch SW is switched to the first fixed contact b side. As a result, the DC power supplied to the output terminal OUT passes through the choke coil L20 and is further supplied as operating power to the amplifier 122 via the first fixed contact b and the movable contact a. Capacitor C20 is a bypass capacitor that grounds leakage components and the like.

Next, FIG. 12 is a circuit diagram showing a configuration example of the U / V booster used in the fifth and seventh embodiments of the present invention.
The U / V booster 130 shown in FIG. 12 is connected to a VHF antenna via a coaxial cable and an input terminal VHF IN to which a received signal of the VHF antenna is supplied, and a mixer is connected to the UHF via a coaxial cable. An input terminal UHF IN to which a reception signal of the antenna is supplied is provided. From the VHF reception signal supplied to the input terminal VHF IN, unnecessary wave components are removed by the BPF 131, amplified by the AMP 132, and supplied to the mixer (MIX) 133. The UHF reception signal supplied to the input terminal UHF IN is supplied with the mixer (MIX) 133 after the unnecessary wave component is removed by the BPF 134 and amplified by the AMP 135. The MIX 133 is a mixer that uses a filter because the signal to be mixed is different in frequency band from the VHF signal and the UHF signal. A mixed signal obtained by mixing the VHF reception signal and the UHF reception signal output from the mixer 133 is output from the output terminal OUT.
The coaxial cable connected to the output terminal OUT is supplied with a DC power superimposed thereon, and the supplied DC power passes through the choke coil L31 and is supplied to the AMP 132 and AMP 135 as an operating power. Further, this DC power source is output from the input terminal UHF IN via the choke coil L30. The direct current power output superimposed on the coaxial cable from the input terminal UHF IN is supplied to the mixer, and when this mixer is provided with a conduction circuit, the direct current power is supplied to the preamplifier via the mixer. It becomes like this. Capacitors C30 and C31 are bypass capacitors for grounding leakage components and the like.

Next, FIG. 13 shows a circuit diagram showing a configuration example of the U / V / BS booster used in the sixth and eighth embodiments of the present invention.
The U / V / BS booster 140 shown in FIG. 13 is connected to a VHF antenna via a coaxial cable, to an input terminal VHF IN to which a received signal of the VHF antenna is supplied, and to a mixer via a coaxial cable. An input terminal UHF IN to which a reception signal of the UHF antenna is supplied, and an input terminal BS IN to which a reception signal of the BS antenna is supplied by connecting a BS antenna via a coaxial cable are provided. The VHF reception signal supplied to the input terminal VHF IN is removed by an unnecessary wave component in the BPF 141, amplified by the AMP 142, and supplied to the first mixer (MIX) 143. The UHF reception signal supplied to the input terminal UHF IN is supplied with the first mixer (MIX) 143 after the unnecessary wave component is removed by the BPF 144 and amplified by the AMP 145. The first MIX 143 is a mixer that uses a filter because the signal to be mixed is different in frequency band from the VHF signal and the UHF signal.

Further, the BS reception signal supplied to the input terminal BS IN is removed by an unnecessary wave component in the BPF 147, amplified by the AMP 148, and supplied to the second mixer (MIX) 146. The mixed signal from the first MIX 143 is input to the second MIX 146, and the VHF reception signal, the UHF reception signal, and the BS reception signal are mixed and output from the second MIX 146. This mixed output is output from the output terminal OUT.
The coaxial cable connected to the output terminal OUT is supplied with a DC power superimposed, and the supplied DC power passes through the choke coil L42 and is supplied to the AMP 142, AMP 145, and AMP 148 as operating power. Further, this DC power source is output from the input terminal UHF IN via the choke coil L40 and is output from the input terminal BS IN via the choke coil L41. The DC power that is output from the UHF IN input terminal superimposed on the coaxial cable is supplied to the mixer, and when this mixer is equipped with a conduction circuit, the DC power supply amplifies the UHF received signal via the mixer. To be supplied to the preamplifier. Also, the DC power that is superimposed on the coaxial cable and output from the BS IN input terminal is supplied to the BS antenna and becomes the operating power of the BS antenna. Capacitors C40 and C41 are bypass capacitors for grounding leakage components and the like.

Next, FIG. 14 is a circuit diagram showing a configuration example of a booster that amplifies the UHF reception signal used in the first to fourth embodiments of the present invention.
A UHF booster 150 shown in FIG. 14 is connected to a mixer that mixes UHF reception signals via a coaxial cable, and is supplied with an input terminal IN to which the mixed reception signal of the UHF antenna is supplied, and a power source via the coaxial cable. An output terminal OUT is provided to which an UHF reception signal amplified by an extractor or a power supply unit is connected. The UHF received signal output from the mixer supplied to the UHF input terminal is amplified by the AMP 152 after removing unnecessary wave components in the BPF 151, and further output from the output terminal OUT after removing unnecessary wave components in the BPF 153. .
When a power supply unit is connected to the output terminal OUT via a coaxial cable, a DC power source superimposed on the coaxial cable is supplied from the power supply unit to the output terminal OUT, and the supplied DC power source passes through the choke coil L51. The AMP 152 is supplied as an operating power source. Further, this DC power source is output from the input terminal IN via the choke coil L50. The DC power output superimposed on the coaxial cable connected to the input terminal IN is supplied to the mixer, and if this mixer is provided with a conduction circuit, the DC power is supplied to the preamplifier via the mixer. Will be supplied. Capacitors C50 and C51 are bypass capacitors for grounding leakage components and the like.

  As described above, in the antenna device according to the present invention, the second directional antenna that avoids the co-channel failure is newly provided, and the reception signal of this antenna is converted into the reception signal of the first directional antenna by the mixer. Try to mix. Therefore, the loss due to the mixer is compensated by the preamplifier, but by using the DC power supply superimposed on the signal transmission path to obtain the operating power of the preamplifier, the device for the hearing system is used. In addition, the antenna apparatus can avoid the same channel failure and improve the CN ratio (Carrier to Noise ratio) to prevent the deterioration of the signal quality. In this case, by providing a power supply extractor, conventional boosters and mixers can be used. Further, when the power extractor is not used, it is only necessary to provide a booster or a mixer with a conduction circuit through which DC power can pass.

It is a figure which shows the structure of the antenna apparatus of 1st Example of this invention. It is a figure which shows the structure of the antenna apparatus of 2nd Example of this invention. It is a figure which shows the structure of the antenna apparatus of 3rd Example of this invention. It is a figure which shows the structure of the antenna apparatus of 4th Example of this invention. It is a figure which shows the structure of the antenna apparatus of 5th Example of this invention. It is a figure which shows the structure of the antenna apparatus of 6th Example of this invention. It is a figure which shows the structure of the antenna apparatus of 7th Example of this invention. It is a figure which shows the structure of the antenna apparatus of 8th Example of this invention. It is a circuit diagram which shows the structure of the power supply extractor used in the 1st, 2nd, 5th, 6th embodiment of the present invention. FIG. 5 is a circuit diagram showing a first configuration example of a preamplifier used in the first to eighth embodiments of the present invention. FIG. 6 is a circuit diagram showing a second configuration example of the preamplifier used in the first to eighth embodiments of the present invention. It is a circuit diagram which shows the structural example of the U * V booster used in 5th Example and 7th Example of this invention. It is a circuit diagram which shows the structural example of the U * V * BS booster used in 6th Example and 8th Example of this invention. It is a circuit diagram which shows the structural example of the booster which amplifies the UHF received signal used in 1st Example thru | or 4th Example. It is a figure which shows the structural example of the conventional antenna apparatus. It is a figure which shows the other structural example of the conventional antenna apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antenna apparatus, 2 Antenna apparatus, 3 Antenna apparatus, 4 Antenna apparatus, 5 Antenna apparatus, 6 Antenna apparatus, 7 Antenna apparatus, 8 Antenna apparatus, 10 1st UHF antenna, 11 2nd UHF antenna, 12 Preamplifier, 13 Mixer, 14 booster, 14 booster, 15 power extractor, 16 power supply unit, 20 first UHF antenna, 21 second UHF antenna, 22a first preamplifier, 22b second preamplifier, 23 mixer, 24 booster , 24 existing booster, 25 power extractor, 26 power supply, 30 first UHF antenna, 31 second UHF antenna, 32 preamplifier, 33 mixer, 34 booster, 36 power supply, 40 first UHF antenna, 41 Second UHF antenna 42a first preamplifier 4 b Second Preamplifier, 43 Mixer, 44 Booster, 46 Power Supply Unit, 50 VHF Antenna, 51 First UHF Antenna, 52 Second UHF Antenna, 53 Preamplifier, 54 Mixer, 55 U · V Booster, 56 Power Supply Extractor, 57 power supply unit, 60 VHF antenna, 61 first UHF antenna, 62 second UHF antenna, 63 BS antenna, 64 preamplifier, 65 mixer, 66 U · V · BS booster, 67 power extractor, 68 Power supply unit, 70 VHF antenna, 71 1st UHF antenna, 72 2nd UHF antenna, 73 preamplifier, 74 mixer, 75 U / V booster, 77 power supply unit, 80 VHF antenna, 81 1st UHF antenna, 82 Second UHF antenna, 83 BS antenna, 84 preamplifier, 85 Combiner, 86 U / V / BS booster, 87 power supply unit, 100 power supply extractor, 110 preamplifier, 111 BPF, 112 amplifier, 113 BPF, 120 preamplifier, 121 BPF, 122 amplifier, 123 BPF, 130 booster, 131 BPF, 132 amplifier, 133 mixer, 134 BPF, 135 amplifier, 140 booster, 141 BPF, 142 amplifier, 143 mixer, 144 BPF, 145 amplifier, 146 mixer, 147 BPF, 148 amplifier, 150 booster, 151 BPF, 152 amplifier , 153 BPF, 200 antenna device, 201 antenna, 202 amplifier, 203 television receiver, 210 antenna device, 211 antenna, 212 amplifier, 213 power supply unit, 214 television receiver

Claims (8)

A first directional antenna directed to a first television broadcast station capable of receiving television broadcast waves;
A second directional antenna directed to a second television broadcast station capable of receiving television broadcast waves;
A preamplifier for amplifying a received signal received by the second directional antenna;
A mixer not using a filter that mixes the received signal of the first directional antenna and the received signal of the second directional antenna amplified by the preamplifier;
A booster for amplifying the mixed reception signal output from the mixer;
The booster is provided by separating the DC power supplied superimposed on the signal transmission path connected to the output side and supplying the DC power to the preamplifier and superimposing the separated DC power supply on the signal transmission path connected to the input side. A power extractor for supplying DC power to
A power supply unit for supplying DC power to the power extractor by superimposing DC power on a signal transmission line connected to the output side of the power extractor;
An antenna device comprising: A second preamplifier for amplifying a reception signal received by the first directional antenna; and the mixer includes a reception signal of the first directional antenna amplified by the second preamplifier The reception signal of the second directional antenna amplified by the preamplifier is mixed,
2. The antenna device according to claim 1, wherein the DC power source separated in the power extractor is also supplied to the second preamplifier.   There is further provided a third directional antenna directed to a third television broadcasting station capable of receiving a television broadcast wave having a frequency band different from that of the first directional antenna and the second directional antenna. The antenna apparatus according to claim 1, wherein a reception signal of the third directional antenna is supplied to the booster.   2. A satellite broadcasting directional antenna directed to a broadcasting satellite capable of receiving satellite broadcasting is further provided, and a reception signal of the satellite broadcasting directional antenna is supplied to the booster. The antenna device described. A first directional antenna directed to a first television broadcast station capable of receiving television broadcast waves;
A second directional antenna directed to a second television broadcast station capable of receiving television broadcast waves;
A preamplifier for amplifying a received signal received by the second directional antenna;
A mixer not using a filter that mixes the received signal of the first directional antenna and the received signal of the second directional antenna amplified by the preamplifier;
A booster for amplifying the mixed reception signal output from the mixer;
A power supply unit for supplying DC power to the booster by superimposing DC power on a signal transmission line connected to the output side of the booster;
The booster is configured to output a DC power supplied from a signal transmission path connected to the output side from a signal transmission path connected to the input side, and the mixer is a signal connected to the output side. The DC power supplied from the transmission path can be output to the signal transmission path connected to the input side, and the DC power source superimposed on the signal transmission path from the power supply unit passes through the booster and the mixer. An antenna device characterized in that the antenna device is also supplied to the preamplifier. A second preamplifier for amplifying a reception signal received by the first directional antenna; and the mixer includes a reception signal of the first directional antenna amplified by the second preamplifier The reception signal of the second directional antenna amplified by the preamplifier is mixed,
6. The antenna according to claim 5, wherein a DC power output from the mixer to a signal transmission path connected to an input side is also supplied to the second preamplifier via the signal transmission path. apparatus.   There is further provided a third directional antenna directed to a third television broadcasting station capable of receiving a television broadcast wave having a frequency band different from that of the first directional antenna and the second directional antenna. 6. The antenna apparatus according to claim 5, wherein a reception signal of the third directional antenna is supplied to the booster. 6. A satellite broadcasting directional antenna directed to a broadcasting satellite capable of receiving satellite broadcasting is further provided, and a reception signal of the satellite broadcasting directional antenna is supplied to the booster. The antenna device described.

Images