JP4388786B2 - TV receiving antenna device - Google Patents

Description

The present invention relates to a VU shared antenna device having a broadband characteristic capable of mainly receiving the VHF band and the UHF band, and another antenna device so that the antenna device can receive radio waves arriving from different directions. The present invention relates to an antenna device that can be easily attached.

Conventional antenna devices for receiving television include a VHF antenna and a UHF antenna. By the way, when the VHF band and the UHF band are to be received using such an antenna, the VHF antenna and the UHF can be used both in an area where radio waves arrive from different directions and in an area where the VHF and UHF radio waves arrive from the same direction. The antennas were installed and each received output was mixed with a mixer or a TV receiving amplifying device and then drawn into the house.
Among these, when VHF and UHF radio waves arrive from the same direction, a VU shared antenna may be used for ease of handling. (For example, see Patent Document 1)

Japanese Utility Model Publication No. 59-69511

However, depending on the receiving area, radio waves in the VHF band and radio waves in the UHF band whose service area is the same area are transmitted from the same area, so that the arrival directions of the radio waves are the same and arrive from different directions. In some cases, radio waves of local stations in neighboring areas can be received.
At this time, radio waves in the VHF band and radio waves in the UHF band coming from the same direction can be received using a VU shared type TV receiving antenna device for ease of handling, but UHF waves coming from other directions can be received. The radio wave needs to be drawn into the home by installing another dedicated antenna device and installing a mixer that separately prepares the received signal of the other antenna device and the received signal of the VU shared type TV receiving antenna device. However, there was a problem that the ease of installation was impaired, and as a result, the cost of installation became high.
The present invention has been made in view of these problems, and an object of the present invention is to provide a television receiving antenna device that is suitable for receiving radio waves from different directions and that enables cost reduction .

The antenna device for receiving a television set according to claim 1, which has been made to achieve the object,
A VU shared type radiator capable of receiving radio waves in the VHF band and the UHF band, and elements such as a reflector and a director are arranged on the arm.
Mixing the feed portion of the radiators, with a received signal from the radiator, so that it can mix a received signal from another antenna apparatus, an input terminal for inputting a received signal from another antenna vessel is built-in,
The mixer receives a received signal from the radiator via a low-pass filter, and receives a received signal from another antenna device input to the input terminal via a high-pass filter. Configure
The low-pass filter and the high-pass filter are configured such that the high-frequency side of the pass-frequency band of the low-pass filter and the low-frequency side of the pass-frequency band of the high-pass filter overlap each other. It is characterized by.

According to a second aspect of the present invention, in the television receiving antenna device according to the first aspect, another antenna device is disposed at the input terminal of the mixer via a transmission cable, and the television receiving antenna device is provided. The antenna device and another antenna device are supported by the same support .

In a third aspect of the present invention, the television receiving antenna device according to the first or second aspect is characterized in that the VU shared radiator is formed of a folded dipole .

  Still further, the invention according to claim 4 is the television receiving antenna device according to any one of claims 1 to 3, wherein the mixer has a connection terminal for receiving a reception signal from the radiator. The low-pass filter, the input terminal, the high-pass filter, a mixing circuit, and an output terminal for outputting a mixed signal, each of which is disposed on a printed circuit board. Features.

According to the television receiving antenna device of the first aspect, the radiator is composed of a VU shared type radiator capable of receiving radio waves in the VHF band and the UHF band, and the power feeding unit of the radiator includes Has a built-in mixer having an input terminal for inputting a received signal from another antenna so that a received signal from the radiator can be mixed with a received signal from another antenna device.
The mixer inputs the received signal from the radiator via a low-pass filter, and inputs the received signal from another antenna device input to the input terminal via the high-pass filter. The low-pass filter and the high-pass filter are configured so that the high-frequency side of the low-pass filter and the low-frequency side of the high-pass filter overlap each other. It is configured.
For this reason, in a region where radio waves arriving from the same direction are received, when it is intended to receive radio waves arriving from different directions together, another antenna device can be easily and inexpensively added .

Then, according to the television signal receiving antenna according to claim 2, another antenna device is provided via a transmission cable to the input terminal of the mixer, the television signal receiving antenna unit and another antenna unit Are supported by the same support , and each antenna can be rotatably fixed in an arbitrary direction, so that radio waves coming from different directions can be received with a simple configuration .

Further, according to the television signal receiving antenna according to claim 3, the VU shared type of radiator, since it is configured in the folded dipole, can provide a broadband VU sharing type of television signal receiving antenna device with a simple structure .

According to a fourth aspect of the present invention, there is provided a television receiving antenna apparatus comprising: a mixer; a connection terminal for inputting a reception signal from the radiator; a low-pass filter; an input terminal; and a high-pass filter. When a mixing circuit, and an output terminal for outputting the mixed signals, by arranging the printed circuit board, since it is configured mixer, without small variation of characteristics, the television having a small stable high frequency characteristic loss A receiving antenna device can be provided.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of a television receiving antenna apparatus according to the present invention. FIG. 2 is a block diagram showing an embodiment of a mixer according to the present invention. FIG. 3 is a plan view showing the open / close state of the power feeding section of the television receiving antenna apparatus of the present invention.

Reference numeral 1 denotes a television receiving antenna device for receiving a VHF band radio wave and a UHF band radio wave coming from the same direction, and 2 denotes a direction different from the VHF and UHF radio waves, which is expressed as another antenna device. This is an antenna for receiving radio waves coming from.
The TV receiving antenna device 1 is a VU-shared wide-band antenna device. In the embodiment of the present application, for example, a radio wave arriving from the same direction receives 90 to 222 MHz in the VHF band, and in the UHF band, This is a VU shared type TV receiving antenna device configured to receive 470 to 542 MHz with one dipole antenna.

As shown in FIG. 1, the television receiving antenna device 1 has the directors 4, 5, radiators 6, and reflectors 7, 8 arranged on the arm 3.
The director 4 is for UHF, and the director 5 is a VHF director with a trap added. The radiator 6 includes four VU-folded folded dipole antennas 10 and four trap coils 11, and can efficiently receive the above-described frequency band. The folded dipole antenna 10 is attached to the power feeding unit 12. The power feeding unit 12 has a waterproof structure molded by using a synthetic resin material. In the internal space of the power feeding unit 12, a matching circuit 20 that receives the reception output of the folded dipole antenna, that is, the radiator 6 is provided. A printed circuit board 21 for sending the received signal to the output terminal 31 is housed.

The printed circuit board 21 is provided with a connection terminal 22 for connection to the matching circuit and an output terminal 31 for outputting a signal from the connection terminal 22 and connecting a coaxial cable 41 for drawing into the house or the like. ing. Further, the printed circuit board 21 is provided with a mixed input terminal 32 to which a transmission cable 40 from an output terminal of another antenna device 2 is connected. The printed circuit board 21 receives a reception output from the other antenna device 2. It is comprised also as a mixer which receives, and is accommodated in the electric power feeding part 12. FIG. In the embodiment of the present application, a 75Ω coaxial cable is used as the transmission cable. However, a 200Ω feeder may be used, and correspondingly, the mixed input terminal 32 may be 75Ω, 200Ω, or 75 / 200Ω.

Here, an example of the configuration of the mixer 21 will be described with reference to FIG. The received signal from the matching circuit 20 that receives the received output of the VU shared type folded dipole 10 is input to the connection terminal 22 formed in the mixer (in other words, the printed circuit board) 21, and the input received signal is a low-pass filter. The signal is input to the mixing circuit 24 via the output terminal 23 and then output to the output terminal 31. Next, the received signal from the other antenna device 2 is input from the coaxial cable 40 to the mixed input terminal 32 and received by the matching circuit 25 formed on the printed circuit board 21 with the printed pattern. The signal is input to the mixing circuit 24 via the high-pass filter 26, mixed with the reception signal of the VU shared television receiving antenna device 1, and then output to the output terminal 31. Here, the other antenna device 2 receives radio waves with different arrival directions of the radio waves received by the VU shared television receiving antenna device 1. For example, a UHF antenna or the like is attached to the antenna device 1. 2 is disposed on the antenna mast 42 or the like, which is the same support, and can be freely adjusted in the direction of the arrival of radio waves.
A specific reception example of the television receiving antenna device according to the present invention will be described. The radio waves received by the VU shared television receiving antenna device 1 are, for example, the VHF band 90 to 222 MHz and the UHF band 470 to 542 MHz transmitted from the same transmission point, and receive radio waves from other directions. The antenna device 2 to be operated is 524 to 770 MHz in the UHF band.

As described above, the invention of the present application includes a VU shared television receiving antenna device 1, a mixer 21 housed in the power feeding unit 12 of the radiator 6 of the antenna device 1, and other mixers provided in the mixer 21. A mixed input terminal 32 for receiving a reception signal from the antenna device 2 and a mixed input terminal 32 connected to the mixed input terminal 32 via a transmission cable 40 and receiving a frequency band higher than the frequency band received by the television receiving antenna device 1. The antenna device for receiving television 1 and the antenna device for receiving television 1 and the other antenna device 2 are supported by the same support 42 and are rotatably arranged in arbitrary directions. In the mixer 21, the high frequency side of the frequency band received by the television receiving antenna device 1 and the low frequency side of the frequency band received by the other antenna device 2 overlap each other. (In the embodiment of the present application, a range of 524 to 542 MHz), for example, a radio wave arriving from the same direction, and in addition to the ch19 of the VHF station and the UHF station, it is newly added by the start of terrestrial digital broadcasting. Can be received by one antenna device 1 even if a wide-area broadcasting channel 24 provided in the network is broadcasted, and another antenna device 2 can be installed in order to receive ch 36 of a UHF station coming from a different direction. This makes it easy to receive. Furthermore, the prefectural broadcasting channels 22 and 26 newly provided by the start of digital terrestrial broadcasting transmitted from the base station in the same direction as the channel 36 can be easily received by the other antenna device 2. In other words, it is possible to receive radio waves arriving from different directions with a simpler configuration, and the new high-frequency broadcasting channel and the prefectural broadcasting channel for the newly started terrestrial digital broadcasting are used for extra reception. It is possible to provide an antenna device that can be handled without adding new equipment.

It should be noted that the present invention is not limited to the embodiment described above, and can be implemented by appropriately changing the configuration and combination of each part without departing from the spirit of the present invention.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
The perspective view of the antenna apparatus for television reception concerning this invention is shown. It is a block diagram which shows the Example of the mixer which concerns on this invention. It is a top view which shows the open / close state of the electric power feeding part of the antenna apparatus for television reception of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Television receiving antenna apparatus, 2 ... Other antenna apparatus, 3 ... Arm, 4 ... Wave director, 5 ... Wave director, 6 ... Radiator, 7 ... Reflector, 8 ... Reflector, 10 ... Folding dipole Antenna 11, trap coil 12, feeding unit 20, matching circuit, 21 printed circuit board (mixer) 22 connection terminal, 23 low-pass filter, 23 mixing circuit, 25 matching circuit, 26 high-pass filter , 31 ... output terminal, 32 ... mixed input terminal.

Claims (4)

A VU shared type radiator capable of receiving radio waves in the VHF band and the UHF band, and elements such as a reflector and a director are arranged on the arm.
Mixing the feed portion of the radiators, with a received signal from the radiator, so that it can mix a received signal from another antenna apparatus, an input terminal for inputting a received signal from another antenna vessel is built-in,
The mixer receives a received signal from the radiator via a low-pass filter, and receives a received signal from another antenna device input to the input terminal via a high-pass filter. Configure
The low-pass filter and the high-pass filter are configured such that the high-frequency side of the pass-frequency band of the low-pass filter and the low-frequency side of the pass-frequency band of the high-pass filter overlap each other. TV receiving antenna device characterized by comprising Claims to an input terminal of said mixer other antenna device is disposed through a transmission cable, and the television signal receiving antenna unit and another antenna device is characterized in that it is supported with the same support 2. The television receiving antenna device according to 1. 3. The television receiving antenna device according to claim 1, wherein the radiator is formed of a folded dipole. The mixer has a connection terminal for receiving a reception signal from the radiator, the low-pass filter, the input terminal, the high-pass filter, a mixing circuit, and an output terminal for outputting a mixed signal. 4. The television receiving antenna apparatus according to claim 1, wherein each of these parts is disposed on a printed circuit board .

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