JP2011176882A - Home gap filler device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a home gap filler device in which installation cost can be reduced and a time required for installation can be shortened by easily and promptly performing installation work. <P>SOLUTION: When using a power supply line 64 for both a reception signal of a digital broadcasting wave and a normal power source, before superimposing the reception signal on the power supply line 64 by a signal superimposing section 63, the receiving signal is frequency-converted from a UHF band to aVHF band reduced in attenuation by a frequency converter 81, and signals of VHF bands sent by the power supply line 64 and via power receptacles 61-1 to 61-3 are converted into an original UHF band by a frequency converter at the side of a retransmission antenna. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a home gap filler device for digital terrestrial broadcasting used for relaying digital terrestrial broadcasting waves indoors, for example.

As a next-generation digital broadcasting system, development of digital terrestrial broadcasting using the current television band based on terrestrial waves is in progress. In this terrestrial digital broadcasting system, implementation of gap filler countermeasures is being studied for the purpose of expanding broadcasting service areas and eliminating difficult viewing areas.
In this gap filler countermeasure, a relay device called a gap filler is installed for each area where broadcast waves do not reach (for example, Patent Document 1 and Patent Document 2).

By the way, in the terrestrial digital broadcasting system, as in the analog broadcasting system, there is a demand for a digital broadcasting wave that can be received by the indoor receiving antenna of the television receiver. Even in such a broadcasting system, implementation of gap filler countermeasures for the purpose of eliminating difficult viewing areas indoors in addition to the broadcasting service area will be considered.
Therefore, there has been proposed a home gap filler device for digital terrestrial broadcasting for allowing a terrestrial digital broadcast wave to be received indoors by a broadcast receiver having a known indoor reception antenna without being limited by the reception location.

JP 2002-101032 A JP 2003-78492 A

  Since the above-mentioned home gap filler device has a simple configuration, there is an advantage that it is inexpensive. By the way, when this home gap filler device becomes widespread, a device that can be easily installed indoors will be required. However, under the present circumstances, since the antenna installation work procedure is complicated, it takes a lot of labor and time to complete the installation, and the installation cost is high.

  In addition, when the retransmission antenna of the home gap filler device fails, the entire home gap filler device must be replaced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a home gap filler device that enables installation work to be carried out easily and quickly, thereby reducing the installation cost and the time required for installation.

  According to the embodiment, in a home gap filler device used for receiving a digital broadcast wave by a known indoor reception antenna installed in a broadcast receiver, the digital broadcast wave is installed outdoors and receives the terrestrial digital broadcast wave. A receiving antenna, an amplifier that amplifies a received signal from the receiving antenna and generates a retransmission signal having the same frequency as the received signal, and a power supply for supplying electric power necessary for operation to an electronic device disposed indoors A power outlet, a first frequency converter for converting the output of the amplifier from a first frequency band of a broadcast band to a second frequency band lower than the first frequency band, and the first frequency A transmission means for sending the output of the converter to a power supply line for supplying power to a power outlet; a connection portion for detachably connecting to the power outlet; A retransmission antenna that has a transmission unit that receives a retransmission signal that is output from the first frequency converter and is transmitted by the transmission unit via the connection unit and transmits the signal to the indoors, and is provided in the retransmission antenna. A filter unit that removes a power component from a signal from the power line obtained by the connection unit, and a transmitter unit that is provided in the retransmission antenna and converts an output signal of the filter unit to the first frequency band. And a second frequency converter to be supplied.

  As described above in detail, according to the present invention, it is possible to provide a home gap filler device that can perform installation work easily and quickly, thereby reducing the installation cost and the time required for installation. .

The block diagram which shows the structure of the home gap filler apparatus which concerns on this invention. The schematic block diagram which shows the connection structure of the amplifier and power supply outlet in 1st Embodiment of this invention. The figure which showed the retransmission antenna in 1st Embodiment of this invention seeing from the side.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a home gap filler device according to the present invention.
In FIG. 1, a terrestrial digital broadcast wave arriving from a transmitting station is received by a receiving antenna 11 attached outdoors, and the received signal is supplied to an amplifier 13 via a feeder 12. The amplifier 13 amplifies the input received signal to a predetermined amplitude level, and outputs the amplified signal as a retransmission signal to a retransmission antenna 14 installed on an indoor wall or ceiling. Then, the retransmission antenna 14 radiates the input retransmission signal indoors as a retransmission wave.
Then, the television receiver 21 installed indoors receives the retransmitted wave with a known simple receiving antenna 22 and reproduces and displays the broadcast content.

(First embodiment)
FIG. 2 is a schematic configuration diagram showing a connection configuration between the amplifier 13 and the power outlet in the first embodiment of the present invention, and FIG. 3 is a diagram showing the retransmission antenna 14 as viewed from the side.

  Each room is provided with a power outlet 61-1 to 61-3, and the power outlet 61-1 to 61-3 has an outlet 62 for supplying power to a normal electronic device. Only -1 to 62-3 are provided.

  In addition, a signal superimposing unit 63 is interposed between the amplifier 13 and the power outlets 61-1 to 61-3. The signal superimposing unit 63 is composed of, for example, an insulating capacitor, and superimposes the output signal of the amplifier 13 on the power supply line 64 for supplying power to the power outlets 61-1 to 61-3. In addition, a choke coil 65 that allows only a low frequency component (power source component) to pass is provided on the right side of the overlapping point with the radio frequency component on the power line 64. The choke coil 65 is for preventing the radio frequency component superimposed on the power source component from flowing out outdoors.

  Further, the re-transmission antenna 14 is provided with a connection pin 71 for being inserted into the insertion ports 62-1 to 62-3 of the power outlets 61-1 to 61-3, and the connection pin 71 and the antenna element 41a, The filter part 72 is interposed between 41b. The filter unit 72 includes, for example, an insulating capacitor, and operates as a so-called high-pass filter that blocks a power supply component (for example, 50 Hz) from a signal from the power supply line 64 and passes a radio frequency component (for example, 300 MHz to 3 GHz). .

  A frequency converter 81 is interposed between the amplifier 13 and the signal superimposing unit 63. The frequency converter 81 converts the output signal of the amplifier 13 from a UHF (Ultra High Frequency) band to a VHF (Very High Frequency) band and supplies the signal to the signal superimposing unit 63.

  In the retransmission antenna 14, the frequency converter 91 is interposed between the antenna elements 41 a and 41 b and the filter unit 72. The frequency converter 91 converts the output signal of the filter unit 72 from the VHF band to the UHF band and supplies the converted signal to the antenna elements 41a and 41b.

Next, the operation in the above configuration will be described.
When the power supply line 64 is shared by the power supply and the radio frequency signal, the attenuation of the high frequency region in the power supply line 64 increases. Therefore, in the fourth embodiment, before the digital broadcast wave reception signal amplified by the amplifier 13 in the signal superimposing unit 63 is superimposed on the power supply line 64, the frequency converter 81 converts the reception signal into, for example, the VHF band. The frequency domain is converted to a frequency region with less attenuation, and is returned to the original UHF band by the frequency converter 91 on the retransmission antenna 14 side.

  As described above, in the first embodiment, when the power supply line 64 is shared by the digital broadcast wave reception signal and the normal power supply, before the reception signal is superimposed on the power supply line 64 by the signal superimposing unit 63. The frequency converter 81 converts the frequency of the received signal from the UHF band to the less attenuated VHF band, and the frequency converter 91 on the retransmission antenna 14 side transmits the signal via the power line 64 and the power outlets 61-1 to 61-3. The obtained VHF band signal is converted to the original UHF band.

  Accordingly, it is possible to reliably transfer the digital broadcast wave reception signal on the power supply line 64 without being affected by the power supply component.

(Other embodiments)
The present invention is not limited to the above embodiment. In the embodiment, an example in which a half-wave dipole antenna is used as a retransmission antenna is shown, but other antenna antennas may be used.

  Furthermore, although the said embodiment demonstrated the structural example which inserts the connection pin provided in a re-transmission antenna in an insertion port, things other than a pin shape may be sufficient.

  In addition, the configuration of the home gap filler device, the type and configuration of the retransmission antenna, the connection configuration of the retransmission antenna, and the like can be implemented with various modifications without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 11 ... Reception antenna, 12 ... Feeder, 13, 43 ... Amplifier, 14 ... Retransmission antenna, 15 ... Distributor, 21 ... Television receiver, 22 ... Simple reception antenna, 61-1 to 61-3 ... Power outlet, 62-1 to 62-3... Insertion port, 41 a and 41 b... Antenna element, 71.

Claims (1)

In a home gap filler device used for receiving a digital broadcast wave by a known indoor reception antenna installed in a broadcast receiver,
A receiving antenna installed outdoors and receiving the terrestrial digital broadcast wave;
An amplifier for amplifying a reception signal from the reception antenna to generate a retransmission signal having the same frequency as the reception signal;
A power outlet for supplying power necessary for operation to an electronic device placed indoors;
A first frequency converter that converts the output of the amplifier from a first frequency band of a broadcast band to a second frequency band that is lower than the first frequency band;
Transmission means for sending the output of the first frequency converter to a power line for supplying power to a power outlet;
A connection section for detachably connecting to the power outlet, and a transmission for receiving a retransmission signal output from the first frequency converter and transmitted by the transmission means via the connection section and transmitting it indoors A retransmission antenna having a portion;
A filter unit that is provided in the retransmission antenna and removes a power supply component from a signal from the power supply line obtained by the connection unit;
A home gap filler device comprising: a second frequency converter provided in the re-transmission antenna, which converts an output signal of the filter unit into the first frequency band and supplies the first frequency band to the transmission unit. .

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