JP3007609B2 - Power supply separated type booster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separated power booster in which a separated amplifier is disposed near an antenna and a separated power supply is disposed near a receiver.

[0002]

2. Description of the Related Art A booster for amplifying a signal received by a VHF / UHF antenna and supplying the amplified signal to a TV receiver is known. However, an amplifier is attached to an antenna pole on which an antenna is attached. 2. Description of the Related Art A power supply-separated booster that efficiently amplifies a signal has been used. In such a power-source-separated booster, an operating power is supplied to the booster from a power supply unit disposed near the TV receiver by using a power supply line connecting the amplifier and the TV receiver. I have. In addition, it has been conventionally performed to provide a satellite antenna for receiving a BS broadcast or a CS broadcast on the antenna pole.

FIG. 6 shows a configuration example of a conventional antenna system provided with such a VHF / UHF antenna and a satellite antenna. In FIG. 6, the satellite antenna 10
The signal received at 1 is supplied to the tuner 106 via the first feed line 108, demodulated by the tuner 106 and supplied to the TV receiver 107. Also, V
The received signal received by the HF antenna 102 and the received signal received by the UHF antenna 103 are respectively amplified and mixed by the amplifying unit 104, guided to the power supply unit 105 via the second power supply line 109, and supplied to the power supply unit 105. TV after passing 105
It is supplied to the receiver 107. The power supply unit 105
Is a power supply for operating the amplifying unit 104.
9 to the amplifying unit 104.

[0004] In such an antenna system,
When it is desired to receive a satellite broadcast, it is necessary to add a dedicated power supply line 108 for guiding a received signal to the TV receiver 107. Therefore, a conventional antenna system as shown in FIG. 7 capable of receiving satellite broadcasting without adding a feeder line is known. In the antenna system shown in FIG. 7, for example, the VHF antenna 112 and the UHF
The satellite antenna 111 is attached to an antenna pole to which the antenna 113 is attached. The reception signal received by the VHF antenna 112 and the UHF antenna 1
The received signals received at 13 are amplified by the amplifying unit 114, respectively, mixed with the received signals received by the satellite antenna 11, and guided to the power supply unit 115 via the feed line 118,
It is supplied to the TV receiver 117 through the power supply unit 115. The received signal received by the satellite antenna 111 is transmitted to the tuner 1 via the power supply line 118 and the power supply unit 115.
16 and demodulated by the tuner 116 to obtain T
It is supplied to the V receiver 117.

The power supply unit 115 supplies a power supply for operating the amplification unit 114 and a power supply for operating the converter unit of the satellite antenna 111 to the amplification unit 11 via a feed line 118.
4 and the satellite antenna 111. By the way, in CS broadcasting and the like, different channels are transmitted using orthogonal linearly polarized waves.
The voltage value of the power supply for operating the converter unit at
Depending on whether to use C11V or DC15V, it is possible to select whether to receive a vertically polarized wave or a horizontally polarized wave. That is, the tuner 116 outputs DC11V when receiving the vertically polarized wave.
Is detected by the power supply unit 115, and the power supply unit 115
C11V is supplied to the amplifying unit 114 and the satellite antenna 111 via the feed line 118. When receiving horizontal polarized waves, the tuner 116 outputs 15 V DC, and this 15 V DC is detected by the power supply unit 115, and the power supply unit 115 supplies the 15 V DC to the amplification unit 11 through the power supply line 118.
4 and the satellite antenna 111. This allows
The satellite antenna 111 can receive orthogonal linearly polarized waves by switching.

[0006]

However, in the antenna system shown in FIG.
When receiving by switching the orthogonal linear polarization in,
The voltage value of the power supplied to the amplifier 114 can also be switched. Then, a spike-like voltage is supplied to the amplifying unit 114 via the feed line 118 at the time of switching, so that V
There is a problem that a reception failure is given to the HF signal and the UHF signal. To solve this problem, the voltage value of the power supplied to the amplifier 114 via the feed line 118 may be kept constant. However, if the voltage value is kept constant, the satellite antenna 111 controls the polarization switching. There is a problem that it cannot be performed.

Accordingly, the present invention provides a power supply separation type booster which can control the polarization switching of a satellite antenna even when the voltage value of the power supply supplied to the power supply separation type booster via a feed line is constant. It is intended to be.

[0008]

In order to achieve the above object, a power supply separated type booster according to the present invention amplifies a reception signal received by a VHF antenna or a UHF antenna, and adjusts the voltage based on a supplied power supply voltage value. An amplification unit that mixes and outputs a received signal received by a satellite antenna capable of switching received polarization, a first feed line and a second feed line
And the amplifier is connected via the first feeder line.
Supply power to operate the unit and the satellite antenna
And outputs the first feeder line output from the amplification unit.
Receiving the transmitted reception signal via the second power supply line;
And a power supply unit configured to guide the second power supply line according to a received polarization.
By detecting which one of the voltage value is the voltage to be supplied to the power supply unit via, the voltage value of the first feed by superimposing a pulse signal to the power supply when it is detected that one of the voltage values
And the amplifying unit transmits the signal through the first feeder line.
When detecting the transmitted pulse signal, the first supply
A voltage value of a power supply supplied via an electric wire is supplied to the satellite antenna as the one voltage value .
The power supply unit generates a driving pulse.
A signal generator, driven by the drive pulse,
Switching the voltage supplied from the receiver to pulse signal
A drive unit for generating a signal, and one voltage from the receiving unit.
The pulse signal generator detects that a value has been supplied.
The drive section is driven by the drive pulse generated from
It is provided with a moving voltage detector .

Further, in the power supply separated type booster,
The amplification unit includes a pulse signal extraction unit that extracts a pulse signal, a DC voltage generation unit that converts a voltage value when a pulse signal is detected to be extracted, and a high-pass that bypasses an input reception signal. It has a filter.

According to the present invention, since the polarization switching is controlled by the pulse signal, the voltage value of the power supplied through the power supply line can be kept constant. Therefore, even if one reception line guides a reception signal received by a VHF antenna or a UHF antenna and a reception signal received by a satellite antenna to a receiver, the polarization of the satellite antenna can be switched. In addition to this, it is possible to prevent the VHF signal and the UHF signal from giving a reception disturbance at the time of polarization switching of the satellite antenna.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an antenna system employing a power-source-separated booster according to the present invention. In FIG. 1, reference numeral 1 denotes a satellite antenna composed of a parabolic antenna capable of receiving BS / CS broadcasts and the like.
The polarization received by the voltage value of the power supply supplied via the power supply line 8-1 can be switched to either the vertical polarization or the horizontal polarization. The satellite antenna 1 includes a converter, and converts a received satellite broadcast into an intermediate frequency and outputs the intermediate frequency. Reference numeral 2 denotes a VHF antenna capable of receiving a VHF broadcast, which is composed of, for example, a multi-element Yagi antenna. 3 is UHF that can receive UHF broadcast
The antenna is, for example, a multi-element Yagi antenna.

Reference numeral 4 denotes an intermediate frequency reception signal output from the satellite antenna 1 which is supplied via a feeder line 8-1;
The reception signal of the F antenna 2 is supplied via the feeder line 8-2, and the reception signal of the UHF antenna 3 is further supplied to the feeder line 8-3.
Amplifying unit supplied through the unit B4
-1 and an amplifier 4-2. Reference numeral 5 denotes a power supply unit connected to the amplification unit 4 via a power supply line 8, and includes a power supply unit 5-1 and a unit A5-2. Reference numeral 6 denotes a tuner which tunes a predetermined channel of a satellite broadcast, demodulates the output, and outputs it to a television receiver 7, and reference numeral 7 denotes a television receiver capable of receiving VHF / UHF. In addition, the tuner 6 and the television receiver 7 receive a reception signal via the power supply unit 5.

In the antenna system configured as described above, the VHF antenna 2 and the UHF antenna 3 are mounted on an antenna pole (not shown), and the satellite antenna 1 may be mounted on the antenna pole. Further, an amplification unit 4 is attached to the antenna pole. The received signal received by the VHF antenna 2 is guided to the amplifying unit 4 by the feed line 8-1,
The received signal received by the UHF antenna 3 is a feeder line 8-2.
To the amplifying unit 4 and the amplifying unit 4-
Amplified and mixed in 2. Further, the reception signal of the intermediate frequency output from the satellite antenna 1 is
1 to the amplifying unit 4 and the unit B4-1.
, And is mixed with the VHF / UHF reception signal in the amplification section 4-1.

The mixed VHF / UHF / satellite reception signal output from the amplifying unit 4 is guided to a power supply unit 5 via a power supply line 8, and supplied to a power supply unit 5-1 and a unit A.
The VHF / UHF reception signal is supplied to the television receiver 7 via 5-2. Power supply unit 5 of this power supply unit 5
-1 supplies power to the amplification unit 4-2 and the satellite antenna 1. The voltage value output from the power supply unit 5-1 is, for example, a constant voltage value of about DC15V. The satellite reception signal is supplied to the tuner 6 via the power supply unit 5-1 and the unit A5-2. If the tuner 6 wants to receive a vertically polarized channel, the tuner 6
Outputs a voltage of about 11 VDC from the input terminal of the received signal. This voltage is applied to the unit A5 in the power supply unit 5.
At -2, it is detected that the voltage value is about DC11V, and the pulse signal is output from the unit A5-2. This pulse signal is superimposed on a power supply of about 15 V DC output from the power supply unit 5-1, and transmitted on the power supply line 8.

The power supplied from the power supply line 8 is supplied to the amplifying unit 4-2 of the amplifying unit 4, and the pulse signal is
-2 to the unit B4-1. When a pulse signal is detected in the unit B4-1, the unit B4-1 generates a voltage of about DC11V and supplies the power supply line 8-1.
Through the satellite antenna 1. As a result, the satellite antenna 1 switches the polarization so as to receive the vertically polarized wave, and the vertically polarized reception signal is output from the satellite antenna 1. The received signal of the vertically polarized wave is supplied to the tuner 6 via the amplifying unit 4, the feed line 8, and the power supply unit 5 as described above, and the demodulated signal of the predetermined channel of the vertically polarized wave is transmitted to the television receiver 7 Will be supplied to Note that the frequency of the pulse signal is set to several tens of kHz, and the unit B4-2 may step down DC15V supplied from the power supply unit 5-1 to DC11V and output it.

When the tuner 6 wants to receive a horizontally polarized channel, the tuner 6 is set to about DC15V.
Is output from the input terminal of the received signal. This voltage is detected by the unit A5-2 in the power supply unit 5 to have a voltage value of about DC15V,
In this case, no pulse signal is output from the unit A5-2. Therefore, no pulse signal is detected in the unit B4-1. At this time, the unit B4-1 generates approximately 15 V DC and supplies it to the satellite antenna 1 via the feeder line 8-1. Thereby, the satellite antenna 1 switches the polarization so as to receive the horizontally polarized wave, and the received signal of the horizontally polarized wave is output from the satellite antenna 1. The received signal of the horizontally polarized wave is supplied to the tuner 6 via the amplifying unit 4, the feeder line 8, and the power supply unit 5 as described above, and the demodulated signal of the predetermined channel of the horizontally polarized wave is transmitted to the television receiver 7 Will be supplied to

In the antenna system employing the power supply separation type booster of the present invention, since the polarization switching of the satellite antenna 1 is controlled in this manner, the voltage value of the power supply supplied on the feed line 8 is fixed. It can be a value (for example, DC15V). Therefore, the voltage value of the power supply supplied to the amplifier 4-2 at the time of polarization switching does not fluctuate, so that VHF / U
It is possible to prevent a possibility of causing a reception failure to the HF reception signal. Note that the voltage value of the power supply output by the power supply unit 5-1 is not necessarily set to DC15V, and may be DC11V or another voltage value. In this case, a DC-DC converter may be provided in the unit B4-1 so that the DC15V and DC11V voltages are switched and transmitted.

Next, FIG. 2 shows a detailed configuration of the unit A5-2 in the power supply separated type booster of the present invention. In FIG. 2, a mixed reception signal that is an RF signal input from an input terminal is output from an output terminal as it is via a high-pass filter (HPF) 13 and supplied to a tuner 6 and a television receiver 7. . Tuner 6
Is output from the output terminal and is supplied to the voltage detection unit 11, and the voltage detection unit 11 detects whether the voltage value is DC11V or DC15V. Here, when the voltage detection unit 11 detects DC 11 V, the voltage detection unit 11 opens the gate that supplies the pulse signal generated from the pulse signal generation unit 10 to the drive unit 12.

Thus, the drive unit 12 is driven by the pulse signal, switches the voltage supplied from the output terminal, and outputs the pulse signal generated by the switching from the input terminal. This pulse signal is supplied to the power supply 5-
1 to the power supply line 8. Also, the voltage detection unit 1
When 1 detects 15 V DC, the voltage detection unit 11 closes the gate that supplies the pulse signal generated from the pulse signal generation unit 10 to the drive unit 12. As a result, no pulse signal is sent from the drive unit 12, and no pulse signal is sent to the power supply line 8.

Next, FIG. 3 shows a detailed configuration of the unit B4-1 in the power supply separated type booster of the present invention. In FIG. 3, a mixed reception signal that is an RF signal input from an input terminal is output from an output terminal as it is via a high-pass filter (HPF) 23 and supplied to an amplification unit 4-2. The pulse signal input to the amplification unit 4 via the power supply line 8 is supplied from an output terminal to a pulse signal extraction unit 20 including a filter for detecting the pulse signal and a detection circuit. The pulse signal detecting section 21 detects the presence or absence of a pulse signal from the output level of the pulse signal extracting section 20, and the pulse signal detecting section 21 includes comparing means. The pulse signal detection unit 21 includes a pulse signal extraction unit 20
When the output level is equal to or higher than a predetermined level, it is determined that a pulse signal has been detected, and the voltage value of the voltage output from the DC voltage generator 22 is controlled to be about DC11V. When the pulse signal detection unit 21 does not detect a pulse signal, control is performed so that the voltage value of the voltage output from the DC voltage generation unit 22 is approximately 15 VDC. Thus, the DC 11 V output from the DC voltage generation unit 22
The voltage of / DC15V is output from the input terminal and supplied to the satellite antenna 1.

Next, FIG. 4 shows a configuration of the power supply unit 5 when the unit A5-2 and the power supply unit 5-1 are integrated. However, the pulse signal generation unit 10, the voltage detection unit 11, and the drive unit 12 are the same as those in the unit A shown in FIG. In FIG. 4, a mixed reception signal that is an RF signal input from an input terminal is:
The signal is directly output from the output terminal via a high-pass filter (HPF) 16 and supplied to the tuner 6 and the television receiver 7. In addition, the voltage detection unit 11
The pulse signal output from the drive unit 12 when V is detected passes through a pulse signal passing circuit 15 including a low-pass filter, and is output from the input terminal to the power supply line 8. In addition, a power supply having a voltage of DC 15 V output from the power supply circuit 14 is also output from the input terminal to the power supply line 8. That is, the pulse signal and the power supply are superimposed on the power supply line 8 and transmitted.

Next, FIG. 5 shows the configuration of the amplification unit 4 when the unit B4-1 and the amplification section 4-2 are integrated. However, the pulse signal extraction unit 20, the pulse signal detection unit 21, and the DC voltage generation unit 22 correspond to the unit B shown in FIG.
Therefore, the description is omitted. In FIG. 5, a received signal output from satellite antenna 1, which is an RF signal input from an input terminal, is a high-pass filter (H
(PF) 23 and supplied to the mixer 26. The input VHF reception signal and the reception signal obtained by amplifying the input UHF reception signal by the amplifier circuit 24 are supplied to the mixer 26, mixed with the RF signal, and output from the output terminal. Further, the pulse signal input from the output terminal via the power supply line 8 is supplied to the pulse signal extraction unit 20 via a pulse signal passing circuit 25 including a low-pass filter. When the pulse signal is detected by the pulse signal detection unit 21 as described above, the DC voltage generation unit 2
2 outputs a voltage of about 11 VDC to the satellite antenna 1 from the input terminal.

The amplifying unit 4 and the power supply unit 5 are not limited to the above-described configuration.
May be any configuration that can control the transmission of the pulse signal according to the input polarization switching voltage. The amplification unit 4 controls the voltage value of the power supply supplied to the satellite antenna 1 according to the presence or absence of the pulse signal. Any configuration is possible as long as it can be performed. In the above description, the power supply voltage value of the amplifier 4-2 is DC15, and the polarization switching voltage values are DC11V and DC15V.
The present invention is not limited to this voltage value, but can be any voltage value.

[0024]

As described above, according to the present invention, since the polarization switching is controlled by the pulse signal, the voltage value of the power supply supplied via the power supply line can be kept constant. Therefore, even if one reception line guides a reception signal received by a VHF antenna or a UHF antenna and a reception signal received by a satellite antenna to a receiver, the polarization of the satellite antenna can be switched. And the voltage supplied to the amplifying unit is constant, so that the VHF signal and the UH
It is possible to prevent reception trouble from being given to the F signal.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an antenna system employing a power supply separated type booster of the present invention.

FIG. 2 is a diagram showing a detailed configuration of a unit A in the power supply separation type booster of the present invention.

FIG. 3 is a diagram showing a detailed configuration of a unit B in the power supply separated type booster of the present invention.

FIG. 4 is a diagram showing a detailed configuration of a power supply unit when a unit A and a power supply unit in the power supply separation type booster of the present invention are integrated.

FIG. 5 is a diagram showing a detailed configuration of an amplification unit when a unit B and an amplification unit are integrated in the power supply separated type booster of the present invention.

FIG. 6 is a diagram showing a configuration example of a conventional antenna system provided with a VHF / UHF antenna and a satellite antenna.

FIG. 7 is a diagram showing a configuration example of a conventional antenna system provided with a VHF / UHF antenna and a satellite antenna, which can be used as one feed line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Satellite antenna 2 VHF antenna 3 UHF antenna 4 Amplification unit 4-1 Unit B 4-2 Amplification unit 5 Power supply unit 5-1 Power supply unit 5-2 Unit A 6 Tuner 7 Television receiver 8,8-1,8- 2,8-3 power supply line 10 pulse signal generation unit 11 voltage detection unit 12 drive unit 13,16,23 HPF 14 power supply circuit 15,25 pulse signal passage circuit 20 pulse signal extraction unit 21 pulse signal detection unit 22 DC voltage generation unit 24 Amplifying circuit 26 Mixer

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-10-256929 (JP, A) JP-A-10-257410 (JP, A) JP-A 8-293812 (JP, A) JP-A 8- 288874 (JP, A) JP-A-5-136704 (JP, A) JP-A-4-135328 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04B 1 / 04-1 / 18 H04N 5/00-7/20

Claims (2)

(57) [Claims] Amplifying a received signal received by a VHF antenna or a UHF antenna and mixing the amplified signal with a received signal received by a satellite antenna capable of switching a received polarization according to a voltage value of a supplied power supply voltage. The output unit is connected to the first feeder line and the second feeder line.
(1) A power supply for operating the amplifying unit and the satellite antenna is supplied through one feed line, and power is supplied from the amplifying unit.
Receiving the received signal transmitted through the first power supply line,
And a power supply unit adapted guided to the receiving unit via the second feed line, the power supply unit, the reception unit in response to said receiving polarization
Voltage supplied to the power supply unit via the second feeder line to detect which one of the voltage value, the voltage value by superimposing a pulse signal to the power supply when it is detected that one of the voltage values
Te sent to the first feed line, the amplifier unit, the first
Said first voltage value of the power supplied via the power supply lines upon detection of the pulse signal transmitted through a feed line as a voltage value of the one are to be supplied to said satellite antenna the power supply unit is a pulse signal for generating a drive pulse
A receiving unit driven by the driving pulse;
Switching the voltage supplied from the unit to generate a pulse signal
The drive unit to generate and one of the voltage values from the receiving unit
Detecting the supply, from the pulse signal generator
The drive unit is driven by the generated drive pulse.
Power separated booster, characterized in that it comprises a voltage detection unit that. 2. The amplifying unit includes: a pulse signal extracting unit that extracts a pulse signal; a DC voltage generating unit that converts a voltage value when it is detected that the pulse signal has been extracted; 2. The power-source-separated booster according to claim 1, further comprising a high-pass filter that bypasses a signal.