JP3165364B2 - Circularly-polarized / linearly-polarized wave reception shared converter and receiver using the converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for receiving circularly and linearly polarized broadcast waves transmitted from, for example, a broadcast satellite (BS) and a communication satellite (CS) to receive intermediate frequency signals (BS-BS).
IF signal, CS-IF (V) signal and CS-IF (H)
Converter), and particularly a converter for receiving both circularly and linearly polarized waves (hereinafter, referred to as a converter) that can receive broadcast waves of both broadcast satellites and communication satellites and convert them to the intermediate frequency signal with one converter. , A converter for dual use of circular and linear polarizations) and a receiver using the same.

[0002]

2. Description of the Related Art In general, in television broadcasting using artificial satellites (geostationary satellites), BS broadcast radio waves from broadcast satellites are transmitted by circularly polarized waves (in Japan, right-handed circularly polarized waves). It is known that CS broadcast radio waves are transmitted by linear polarization, and that CS broadcast radio waves are transmitted by either vertical polarization or horizontal polarization depending on the broadcast channel.

Therefore, when receiving broadcast waves from both a broadcast satellite and a communication satellite, for example, as shown in FIG.
Even if a so-called BS / CS tuner 6 capable of receiving both a BS broadcast and a CS broadcast is used on the receiving device side, the BS broadcast radio wave receiving antenna 101 and the CS broadcast radio wave receiving antenna 20 are used on the parabola antenna side.
It is necessary to separately provide two parabolic antennas 1 and 2. However, two parabolic antennas 1
To install 01 and 201, a large space is required as an installation place, and installation work takes time,
Further, there is a problem that the cost increases.

Therefore, as a device for solving the above-mentioned problem, a so-called BS / CS shared antenna 301 which can receive broadcast waves of both a broadcasting satellite and a communication satellite as shown in FIG. There is something. This means that, for one parabolic antenna 301, a BS broadcast radio wave receiving converter (hereinafter, referred to as a BS converter) 302 and a CS broadcast radio wave receiving converter (hereinafter, referred to as a BS converter).
Called CS converter. ) 303 are provided to solve the problems related to the installation space and installation work of the antenna as described above.

As shown in FIG. 1, converters 302 and 303 are connected to BS input terminals 6a and CS of BS / CS tuner 6 via coaxial cables 304 and 305, respectively.
It is connected to the input terminal 6b. In this state, BS / C
When a channel is selected on the S tuner 6 to view a BS broadcast, the BS / CS tuner 6
A DC voltage of, for example, +15 V is output from the input terminal 6a as a power supply for driving the BS converter 302. The DC voltage is supplied to the BS converter 3 via the coaxial cable 304.
02. The BS converter 302 is supplied with the DC voltage so that the parabolic antenna 301
A BS broadcast wave (specifically, a radio wave from a broadcast satellite converged by a parabolic antenna 301 and further picked up by a primary radiator (not shown) connected to the BS converter 302) is converted into an intermediate frequency signal. , So-called B
The signal is converted into an S-IF signal, which is
To the BS / CS tuner 6 via And B
The S / CS tuner 6 processes the supplied BS-IF signal, demodulates the signal into a video signal and an audio signal of the selected channel, and supplies this to a receiver (not shown). It is needless to say that the parabola antenna 301 must be set at an angle in the direction of arrival of the BS broadcast wave when receiving the BS broadcast wave.

On the other hand, on the BS / CS tuner 6 side, C
When you select a channel to watch S broadcast, this B
The S / CS tuner 6 receives the CS signal from the CS input terminal 6b.
A DC voltage as a power supply for driving the converter 303 is output. As the DC voltage, a DC voltage of, for example, +11 V is output when the selected channel is a channel using vertical polarization, and a DC voltage of, for example, +15 V is used when the selected channel is a channel using horizontal polarization. A DC voltage is output, and the DC voltage is supplied to the CS converter 303 via the coaxial cable 305. The CS converter 303 is supplied with the DC voltage,
The CS broadcast radio wave received by the parabolic antenna 301 (specifically, converged by the parabolic antenna 301,
(A radio wave from a communication satellite picked up by a primary radiator (not shown) connected to the S converter 303)
Is an intermediate frequency signal, a so-called CS-IF (V) signal or CS
-IF (H) signal, which is converted to the coaxial cable 3
05 to the BS / CS tuner 6. The BS / CS tuner 6 then supplies the CS-I
The F (V) signal or the CS-IF (H) signal is processed, demodulated into a video signal and an audio signal of the selected channel, and supplied to the receiver. It is needless to say that the parabola antenna 301 must be set at an angle to the arrival direction of the CS broadcast radio wave when receiving the CS broadcast radio wave in this way.

As described above, in the apparatus shown in FIG. 10, since the BS and CS broadcast radio waves can be received by one parabolic antenna 301, unlike the apparatus shown in FIG. Two parabolic antennas 101 and 20 for radio wave reception and CS broadcast radio wave reception
It is not necessary to provide each 1 separately. Usually, the parabolic antenna 301 is installed outdoors, and the BS / CS tuner 6 is installed indoors. Also, BS / CS tuner 6
Output terminals 6a, 6b from the coaxial cables 304, 30
The DC voltage supplied to each of the converters 302 and 303 via 5 is supplied with the inner conductor side of the coaxial cables 304 and 305 being plus (+) and the outer conductor side being minus (-).

[0008]

However, according to the prior art shown in FIG. 10, the converters 302 and 303 of the parabolic antenna 301 installed outdoors and the BS / CS tuner 6 installed indoors are different from each other. Two separate each
Since the connection is made by the coaxial cables 304 and 305, there is a problem that the wiring work of the coaxial cables 304 and 305 is very troublesome and troublesome. The problem is that the BS / C
This becomes more noticeable as the distance to the S tuner 6 increases.

Further, since two converters 302 and 303 are provided for one parabolic antenna 301, the parabolic antenna 301 itself becomes large, and there is also a problem that it is easily affected by wind, snow and the like. is there.

In order to solve the above-mentioned problems, the present invention provides a circular / linear polarized wave capable of receiving both a circularly polarized wave from a broadcasting satellite and a linearly polarized wave from a communication satellite. It is an object of the present invention to provide a shared converter and a receiver using the circular / linear polarization shared converter.

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

SUMMARY OF THE INVENTION The present invention comprises a dielectric plate,
A first to fourth power supply probes arranged radially from the predetermined point on one surface of the dielectric plate and extending radially from the predetermined point at intervals of approximately 90 degrees around a predetermined point in the circumferential direction thereof. The first and second power supply probes which are adjacent to each other in the circumferential direction among the power supply probes are connected to each other by a transmission line having a length different from that of the other by approximately λg / 4 (where λg is a transmission wavelength). A receiving probe; first conversion means for converting a circularly polarized reception signal obtained by both the first and second power supply probes into a first intermediate frequency signal; and a third power supply probe. A second converter for converting the received signal of the first linearly polarized wave into a second intermediate frequency signal;
Conversion means, a third conversion means for converting the second linearly polarized reception signal obtained from the fourth power supply probe into a third intermediate frequency signal, A first output terminal to which power is supplied and the first intermediate frequency signal when the voltage level of the DC power supply corresponds to a predetermined first voltage level; When the second intermediate frequency signal corresponds to a predetermined second voltage level different from the first voltage level, the second intermediate frequency signal is set to a predetermined second voltage level different from the first and second voltage levels. When the third intermediate frequency signal corresponds to the third voltage level,
And an output control means for outputting the signals from the output terminals respectively. That is, the receiving device according to the present invention includes an input terminal connectable to the first output terminal and a third terminal to which a DC voltage is supplied to one of the external terminals.
Switching means for switching to a state in which a signal input from the input terminal is output from an output terminal of the third and fourth output terminals to which the DC voltage is supplied, and a fourth output terminal; And The DC voltage supplied to the fourth output terminal has a sixth or seventh voltage level having a different voltage level, and the DC voltage is supplied to the third output terminal. When the DC power supply corresponding to the first voltage level is output from the input terminal, and when the DC voltage having the sixth or seventh voltage level is supplied to the fourth output terminal, DC power supply output means for outputting a DC power supply corresponding to the second or third voltage level from the input terminal is provided.

For example, now, the receiving apparatus according to the present invention and the above
Circular / linear polarization converter is connected.
Specifically, the input terminal of the receiver and the circular / linear polarization
When the first output terminal of the shared converter is connected
I do. Then, in this state, for example,
It is assumed that the DC voltage is supplied to the output terminal 3. Do
Corresponding to the first voltage level from the input terminal of the receiving device.
DC power is output, and this DC power is
The first of the above circular and linear polarization dual-use converters connected to
It is supplied to the output terminal. As a result, a BS-IF signal (first intermediate frequency signal) is output from the first output terminal of the converter for circular / linear polarization, and the BS-IF signal is input from the input terminal, Is output from the output terminal.

On the other hand, the fourth output of the receiving apparatus according to the present invention
DC voltage having the sixth or seventh voltage level at a terminal
Is supplied. Then, a DC power supply corresponding to each of the second and third voltage levels is output from the input terminal, and this DC power supply is connected to the first of the circular and linear polarization shared converters.
Output terminal. Here, when the voltage level of the DC power supply supplied to the first output terminal corresponds to the second voltage level (when the DC voltage has the sixth voltage level), the circular / linear polarization shared converter CS-IF (V) signal (second intermediate frequency signal) from the first output terminal
Is output. On the other hand, if the voltage level of the DC power
(When the DC voltage has the seventh voltage level), the CS-IF (H) signal (third intermediate frequency) is output from the first output terminal of the circular / linear polarization shared converter. Signal) is output. Then, the CS-IF (V) signal or the CS-I signal output from the first output terminal is output.
The F (H) signal is input from the input terminal and output from the third output terminal.

That is, the BS-IF signal and CS signal are supplied according to the DC voltage supplied from the outside to the third or fourth output terminal.
Either the -IF (V) signal or the CS-IF (H) signal is automatically sorted and output from the third or fourth output terminal.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a dual-polarization / linear-polarization converter and a receiving apparatus using the same according to the present invention will be described with reference to FIGS. In FIG.
FIG. 2 is a schematic connection diagram of the above-described circular / linear polarization shared converter 2 and a receiving device 3.

As shown in FIG. 1, the converter 2 for both circular and linear polarization is mounted on, for example, a parabolic antenna 1 which is installed outdoors. Have been. This circle
As will be described later, the dual-polarization converter 2 is capable of receiving broadcast radio waves transmitted from both broadcast satellites and communication satellites. As shown in the enlarged external view of FIG. A primary radiator section 21 that converts the broadcast radio wave into an intermediate frequency signal.

The primary radiator section 21 is composed of, for example, a conical horn section 23 and a circular waveguide section 24 connected to the small-diameter opening side of the horn section 23. And
The converter section 22 is provided on the opposite side of the circular waveguide section 24 to the side where the horn section 23 is connected.

The converter section 22 includes the primary radiator section 2
1, a dielectric plate 25 provided with a circuit for converting the broadcast radio wave into an intermediate frequency signal, an output connector 26 for outputting the intermediate frequency signal, and the output connector 26 with the output connector 26 exposed to the outside. Dielectric plate 25
And a case 27 surrounding the case. The dielectric plate 25 is provided so as to be substantially perpendicular to the tube axis of the circular waveguide 24 and a part thereof is located in the circular waveguide 24. As the output connector 26, for example, a C15 type connector for a coaxial cable is used. Further, the case 25 has a waterproof structure made of, for example, aluminum die-casting so that rainwater or the like does not enter the inside. It should be noted that the external shape of the circular / linear polarization dual-purpose converter 2 is a single converter conventionally used generally, for example, the BS shown in FIG.
Parabolic antenna 101 and CS parabolic antenna 201
Each converter provided in FIG.
The shape is substantially the same as that of the S converter 302 and the CS converter 303.

The circuit formed on the dielectric plate 25 has a circuit configuration as shown in FIG. 1, for example. The circle shown by a dashed line in the figure indicates that the circular waveguide portion 24 of the primary radiator 21 is located at this portion, and the circular waveguide portion 24 has the same shape as the horn portion 23. It is provided so as to face the back side of the paper in the figure.

That is, the surface of the dielectric plate 25 opposite to the side where the horn portion 23 is located (the surface on the front side of the sheet of FIG. 1).
In the circumferential direction of the circle indicated by the dashed line (the circular waveguide 2).
4 (circumferential direction 4) so as to extend radially from the center of the circle (the tube axis of the circular waveguide 24) at intervals of approximately 90 degrees.
Two power supply probes 30a to 30d are arranged.

These four power supply probes 30a to 30a
d, two feed probes 30a and 30b adjacent to each other in the circumferential direction are different from each other in length by about λg / 4 (λg is a transmission wavelength),
Transmission line 3 for coupling via transmission lines 31a and 31b, respectively.
Connected to one. That is, the two power supply probes 30a and 30b act as a circular-linear polarization converter,
For example, it acts as a so-called BS receiving probe that converts a 12 GHz band BS broadcast wave transmitted from a broadcast satellite with circular polarization into an electric signal. Note that the above two power supply probes 3
Each of Oa and 30b is formed in a substantially U-shape with a halfway bent at a substantially right angle. This reduces the occupation area of the power supply probes 30a and 30b on the dielectric plate 25. That's why.

As shown by a substantially square dotted line in FIG. 1, the surface of the dielectric plate 25 on which the horn portion 23 is located (the surface on the back side of the paper shown in FIG. 1) is Patch element 13 electromagnetically coupled to probes 30a and 30b
0 is provided. The patch element 130 passes through the intersection of a straight line along the feeding probe 30a and a straight line along the feeding probe 30b, and is on a straight line that forms 45 degrees with respect to each of the feeding probes 30a and 30b. The power supply probes 30a and 30b are arranged at positions closer to the power supply probes 30a and 30b than the intersection so as not to overlap with the power supply probes 30a and 30b. By providing the patch element 130 in this manner, the standing wave ratio, the directivity of the main polarization, and the directivity of the cross polarization of the two feeding probes 30a and 30b acting as the circular-linear polarization converter are improved. can do.

The power supply probes 30a and 30b
The other power supply probes 30c and 30d, on the other hand, use the so-called CS (vertical polarization), for example, in which the power supply probe 30c converts, for example, a 12 GHz band CS broadcast wave transmitted as a vertically polarized wave from a communication satellite into an electric signal. Acts as a receiving probe. The other power supply probe 30d, which is arranged at a substantially right angle with the CS (vertical polarization) power supply probe 30c, transmits, for example, a 12 GHz band CS broadcast radio wave transmitted from a communication satellite with horizontal polarization. It functions as a so-called CS (horizontally polarized wave) receiving probe that converts it into an electric signal.

In other words, the four power supply probes 30a to 30d are connected to the circularly polarized BS broadcast radio wave picked up by the primary radiator section 21 and the vertically and horizontally polarized C broadcast waves.
A reception probe 30 capable of receiving all three types of broadcast radio waves including the S broadcast radio wave is formed. The four power supply probes 30a to 30d and the transmission line 3
1a, 31b, coupling transmission line 31, and patch element 13
0 is formed, for example, by etching a copper foil uniformly formed on both surfaces of the dielectric plate 25, and the etching pattern is plated with solder.

Among the receiving probes 30, the power supply probes 30a and 30b for receiving BS are connected to the transmission lines 31a and 3b.
12b output through the transmission line 1b and the coupling transmission line 31
The z-band electric signal (hereinafter, this electric signal is referred to as a BS television broadcast signal) is supplied to, for example, amplifiers 32a and 32b.
Low noise amplifier (BS-LNA) 32 consisting of
For example, two-stage amplification is performed with a gain amplification of 16 to 18 dB.
Amplifiers 32a and 32b constituting the low noise amplifier 32
Is a very low-noise and high-frequency amplifying element such as a gallium arsenide field effect transistor (Ga).
As-FET).

The output of the low-noise amplifier 32 is supplied via a band-pass filter (BPF) 33 to a mixer 34 composed of, for example, a gallium arsenide Schottky barrier diode or a balanced mixer. In the mixer 34, the signal is mixed with a local oscillation signal of, for example, 10.678 GHz from a local oscillator (BS-LO) 35 and heterodyne-detected.
It is converted into a band intermediate frequency signal, a so-called BS-IF signal.

On the other hand, 12 GHz output from the power supply probes 30c and 30d for receiving CS (vertically polarized light and horizontal polarized light)
z-band electric signals (hereinafter, these electric signals are each referred to as CS
(V) Television broadcast signal, CS (H) television broadcast signal. ) Are low noise amplifiers (CS / V
-LNA-1st, CS / H-LNA-1st) 36,
After being amplified by 37, they are amplified by a common low noise amplifier (CS-LNA-2nd) 38. These low-noise amplifiers 36, 37 and 38 are also formed of, for example, gallium arsenide field-effect transistors (GaAs-FETs), like the low-noise amplifier 32 on the BS receiving side. And these low noise amplifiers 3
According to 6, 37 and 38, each of the power supply probes 30c,
The signal output from 30d is, for example, 16 to 18 dB.
, And two-stage amplification.

The output of the low-noise amplifier 38 at the latter stage is supplied to a mixer 40 comprising, for example, a gallium arsenide Schottky barrier diode or a balanced mixer via a band-pass filter (BPF) 39. You.
In the mixer 40, a local oscillator (CS-
LO) 41 and mixed with a local oscillation signal of, for example, 11.2 GHz, and subjected to heterodyne detection, thereby being converted into an intermediate frequency signal of, for example, a 1 GHz band, a so-called CS-IF (V) signal or CS-IF (H) signal. You.

Each of the above intermediate frequency signals, ie, the BS-IF signal, the CS-IF (V) signal or the CS-IF (H) signal, is further supplied to a common intermediate frequency amplifier 42, where: After being amplified with a gain of, for example, 30 to 40 dB, it is output from the output connector 26 via the DC cut capacitor 43.

The circuit constituted by the low-noise amplifier 32, the band-pass filter 33, the mixer 34, the local oscillator 35 and the intermediate frequency amplifier 42 corresponds to the first conversion means described in the claims. The intermediate frequency signal obtained by conversion by this circuit, that is, the BS-IF signal, corresponds to the first intermediate frequency signal. Further, the low noise amplifiers 36, 3
8. Band-pass filter 39, mixer 40, local oscillator 41
And a circuit constituted by the intermediate frequency amplifier 42 corresponds to the second conversion means described in the claims, and an intermediate frequency signal obtained by conversion by this circuit, ie, CS-IF
(V) signal corresponds to the second intermediate frequency signal. A circuit constituted by the low-noise amplifiers 37 and 38, the band-pass filter 39, the mixer 40, the local oscillator 41, and the intermediate frequency amplifier 42 corresponds to the third conversion means described in the claims, The intermediate frequency signal obtained by conversion by this circuit, that is, the CS-IF (H) signal corresponds to the third intermediate frequency signal.

Incidentally, similarly to the conventional converter, a DC power source is supplied from outside (ie, the tuner side) to the circular / linear polarization dual-purpose converter 2 through the output connector 26, and the DC power source is used as a power source. The above circuits are configured to operate. However, as the DC power supply, a DC voltage having a selectively different voltage level, for example, +8
A DC voltage having any one of V, +11 V and +15 V is supplied, and which of the above circuits is supplied with a driving power source, that is, which circuit is operated, according to this voltage level Is configured to be automatically selected.

That is, the DC power supplied through the output connector 26 is supplied to the power supply section 62 through the smoothing coil 61, where it is converted to a stable DC voltage of a predetermined voltage level, for example, + 5V. . This stabilized + 5V
Is supplied to the intermediate frequency amplifier 42 as a power supply for driving the same, and is also supplied to the comparison circuit 63.

The DC power supplied to the output connector 26 is supplied to the comparison circuit 63 via the smoothing coil 61 in addition to the DC voltage of +5 V. The comparison circuit 63 determines whether or not the DC power supply is at a predetermined voltage level, for example, about + 8V or a voltage level exceeding the voltage level, for example, + 11V or more. When it is determined that the level is about +8 V, for example, the DC voltage of +5 V is supplied to the low-noise amplifier 32 and the local oscillator 35 on the BS broadcast radio wave (circularly polarized wave) receiving side as respective driving power supplies. Note that the DC voltage of +5 V supplied to the low noise amplifier 32 is:
The noise component contained therein is removed by the BS-LNA power supply unit 64 before being supplied.

On the other hand, when the comparing circuit 63 determines that the voltage level of the DC power supply is, for example, +11 V or more, the DC voltage of +5 V is supplied to the low noise amplifier 32.
The signal is not supplied to the local oscillator 35, but is supplied to the other comparison circuit 65, the downstream low-noise amplifier 38 on the receiving side of the CS broadcast radio wave (linearly polarized wave), and the local oscillator 41. In addition,
With respect to the DC voltage of +5 V supplied to the low-noise amplifier 38 at the subsequent stage, the noise component contained therein is converted into a CS-LNA
It is supplied after being removed by the second power supply unit 66.

The comparing circuit 65 is also provided with the comparing circuit 6
3, the DC power is supplied. The comparison circuit 65 determines whether or not the DC power supply is at a predetermined voltage level, for example, about +11 V, or a voltage level exceeding this, for example, about +15 V. When it is determined that the voltage level is, for example, about +11 V, the DC voltage of +5 V is supplied to the first-stage low-noise amplifier 36 on the CS broadcast radio wave (vertically polarized wave) receiving side as a driving power supply. Note that this low noise amplifier 3
The DC voltage of +5 V supplied to 6 is supplied after the noise component included therein is removed by the CS / V-LNA first power supply section 67.

On the other hand, when the comparing circuit 65 determines that the voltage level of the DC power supply is, for example, about +15 V, the DC voltage of +5 V is applied to the first stage of the CS broadcast radio wave (horizontal polarization) receiving side. It is supplied to the noise amplifier 37 as its driving power supply. The DC voltage of +5 V supplied to the low noise amplifier 37 has a noise component contained therein of C5.
The power is supplied after being removed by the S / H-LNA first power supply unit 68.

That is, when the voltage level of the DC power supplied from the outside via the output connector 26 is, for example, about +8 V, the low-noise amplifier 3 for receiving BS broadcast radio waves (circularly polarized waves)
2. For the local oscillator 35 and the intermediate frequency amplifier 42,
A DC voltage of +5 V serving as a power supply for each drive is supplied. Therefore, in this state, an intermediate frequency signal obtained by converting the BS television broadcast signal, a so-called BS-IF signal, is output from the output connector 26.

On the other hand, when the voltage level of the DC power supply is, for example, about +11 V, the low-noise amplifier 36 for receiving the CS broadcast wave (vertically polarized wave), the low-noise amplifier 38 at the subsequent stage, the local oscillator 41 and the intermediate frequency amplifier 42 On the other hand, a +5 V DC voltage serving as a driving power supply is supplied. Therefore, in this state, the intermediate frequency signal obtained by converting the CS (V) television broadcast signal, that is, the CS-IF (V) signal,
Output from the output connector 26.

When the voltage level of the DC power supply is, for example, about +15 V, the low-noise amplifier 37 for receiving the CS broadcast radio wave (horizontal polarization), the low-noise amplifier 38 at the subsequent stage, the local oscillator 41 and the intermediate frequency amplifier 42 are connected. On the other hand, a +5 V DC voltage serving as a driving power supply is supplied. Therefore,
In this state, an intermediate frequency signal obtained by converting the CS (H) television broadcast signal, that is, a CS-IF (H) signal is output from the output connector 26.

It should be noted that this circular / linear polarization shared converter 2
Correspond to the first output terminal described in the claims. Also, this output connector 2
The voltage levels of, for example, +8 V, +11 V, and +15 V of the DC power supplied from the outside via the line 6 correspond to the first, second, and third voltage levels described in the claims. Then, the comparison circuits 63 and 65 compare and determine the voltage level of the DC power supply, and sort the driving power supply to be supplied to each circuit based on the determination result.
A configuration in which only one intermediate frequency signal output from the output connector 26 is selected corresponds to the output control means.

Next, the above-mentioned circular / linear polarization shared converter 2
Will be described with reference to FIG. This receiving device 3
As shown in FIG. 2, an automatic switching device (hereinafter, referred to as a selector) 5 and a BS / CS tuner 6 and cables connecting these components to each other, for example, coaxial cables 7 and 8, are provided. Installed in

The selector 5 among the above components is connected to the output connector 26 of the dual circular / linear polarization converter 2.
The BS-IF signal, CS-IF (V) signal or CS-
It has an antenna input terminal 5a to which an IF (H) signal is supplied, and these are connected by one cable, for example, a coaxial cable 4. Also, this selector 5
In addition to the antenna input terminal 5a, a BS output terminal 5b from which the BS-IF signal is output, and the CS-IF
CS that outputs a (V) signal or CS-IF (H) signal
It has two output terminals 5 c, and one of these output terminals 5 b, 5 c is configured to be supplied with a DC voltage from outside, for example, from a BS / CS tuner 6.

FIG. 4 shows an internal circuit diagram of the selector 5. As shown in the figure, the antenna input terminal 5a is connected to the input side (the left side in the figure) of the signal switching circuit 52 via the DC cut capacitor 51. The BS output terminal 5b and the CS output terminal 5c are connected to the output side (the right side in the figure) of the signal switching circuit 52 via DC cut capacitors 53 and 54, respectively. The signal switching circuit 52 switches so that the input side is connected to one of the output sides in accordance with a switching control signal to be described later. That is, when the signal switching circuit 52 switches, the antenna input terminal 5a BS output terminal 5b or C
It is connected to one of the S output terminals 5c in an alternating manner.

The BS output terminal 5b is connected to the input side (IN) of the voltage conversion circuit 56 via the smoothing coil 55. When a predetermined voltage level, for example, +15 V DC voltage is supplied from the outside (BS / CS tuner 6) to the BS output terminal 5b,
This DC voltage is converted into, for example, + 8V. The +8 V DC voltage converted by the voltage conversion circuit 56 is output to the outside from the antenna input terminal 5 a via the backflow prevention diode 57 and the smoothing coil 58, and further, via the coaxial cable 4.
It is configured to be supplied to the output connector 26 of the converter 2.

Further, the DC voltage of +8 V is also supplied to the signal switching circuit 52 as the above-described switching control signal. The signal switching circuit 52 is connected to the antenna input terminal 5a and the BS output terminal 5 when the switching control signal is supplied.
b is connected in an alternating manner.

On the other hand, the CS output terminal 5c is connected to the anode of the backflow prevention diode 60 via the smoothing coil 59. The backflow prevention diode 60
Is connected to the antenna input terminal 5a via the smoothing coil 58. That is, this CS output terminal 5
When a DC voltage is supplied from the outside (BS / CS tuner 6) to c, this DC voltage is output from the antenna input terminal 5a to the outside via the smoothing coil 59, the backflow prevention diode 60 and the smoothing coil 58. In addition, the power is supplied to the output connector 26 of the converter 2 for both circular and linear polarization via the coaxial cable 4.

When a DC voltage is supplied to the CS output terminal 5c, the DC voltage is not supplied from the outside to the BS output terminal 5b. No signal is provided.
In this state, the signal switching circuit 52 is configured to connect the antenna input terminal 5a and the CS output terminal 5c in an alternating manner. That is, the signal switching circuit 52
Of the BS output terminal 5b and the CS output terminal 5c, the output terminal on the side to which a DC voltage is supplied from the outside is switched to be connected to the antenna input terminal 5a in an AC manner.

The BS / CS tuner 6 constituting the receiving device 3 together with the selector 5 is an existing device which is the same as that used in the prior art shown in FIGS.
It can receive both BS broadcasts and CS broadcasts. That is, an intermediate frequency signal obtained by converting a BS television broadcast signal, that is, a BS input terminal 6a to which a BS-IF signal is inputted, and an intermediate frequency signal obtained by converting a CS television broadcast signal, that is, a CS-IF signal. It has two input terminals, a CS input terminal 6b to which an IF (V) signal or a CS-IF (H) signal is input. The BS output terminal 5 of the selector 5 is connected to the BS input terminal 6a and the CS input terminal 6b via coaxial cables 7 and 8.
b and the CS output terminal 5c are connected to each other.

As described above, when the BS / CS tuner 6 selects a channel to view a BS broadcast when the parabolic antenna 1 is set at an angle in the direction of arrival of the radio wave of the broadcast satellite, the BS input terminal 6a From + for example
A DC voltage of 15 V is output, and a BS-IF signal input from the BS input terminal 6a is processed and demodulated into a video signal and an audio signal of the selected channel.
This is supplied to a receiver (not shown). On the other hand, when the parabola antenna 1 is set at an angle to the direction of arrival of the radio wave from the communication satellite, if a channel is selected to view the CS broadcast, if the channel is a channel using vertical polarization, the CS input terminal 6b Outputs a DC voltage of, for example, +11 V, processes the CS-IF (V) signal input from the CS input terminal 6b, demodulates the signal into a video signal and an audio signal of the selected channel, and receives the signal. Supply to the machine. When the channel is a channel using horizontal polarization, a DC voltage of, for example, +15 V is output from the CS input terminal 6b.
CS-IF (H) input from the CS input terminal 6b
The signal is processed, demodulated into a video signal and an audio signal of the selected channel, and supplied to the receiver. Although not shown, this BS / CS tuner 6
Uses, for example, a commercial AC voltage as its driving power supply,
Based on the commercial AC voltage, the DC voltages output from the input terminals 6a and 6b are generated.

The antenna input terminal 5a of the selector 5 corresponds to the input terminal described in the claims. Further, the BS output terminal 5b and the CS output terminal 5c
These correspond to the third and fourth output terminals. Then, the voltage level of +11 V or +15 V of the DC voltage supplied from the BS / CS tuner 6 to the CS output terminal 5 c is:
This corresponds to the sixth or seventh voltage level. Further, a configuration in which the signal switching circuit 52 is provided and the signal conversion circuit 52 is switched by supplying a +8 V DC voltage from the voltage conversion circuit 56 to the switching means corresponds to the switching means. Further, the DC voltage of +15 V supplied to the BS output terminal 5b is converted to + 8V by the voltage conversion circuit 56, output to the outside from the antenna input terminal 5a, and supplied to the CS output terminal 5c of + 11V or + 15V. The configuration in which the DC voltage is output from the antenna input terminal 5a at the same voltage level (specifically, the voltage level obtained by subtracting the forward voltage of the backflow prevention diode 60) corresponds to the DC power supply output means.

Next, the case where the converter 2 for dual use of circular and linear polarization and the receiving device 3 configured as described above are connected as shown in FIG. The operation will be described with reference to FIG.

That is, the output connector 26 of the converter 2 is connected to the antenna input terminal 5a of the selector 5 by the coaxial cable 4, and the output terminals 5b and 5c of the selector 5 and the BS / CS tuner 6 are connected. Each input terminal 6
a and 6b are connected by coaxial cables 7 and 8, respectively.

In this state, the BS / CS tuner 6
When a channel is selected so as to view a BS broadcast in, a DC voltage of +15 V is output from the BS input terminal 6a of the BS / CS tuner 6, as shown in FIG.
This DC voltage is supplied to the BS output terminal 5b of the selector 5 via the coaxial cable 7. The selector 5 converts the DC voltage from +15 V to +8 V, outputs the DC voltage from the antenna input terminal 5a, and makes the antenna input terminal 5a and the BS output terminal 5b AC-connected. The DC voltage of +8 V output from the antenna input terminal 5a is supplied to the output connector 26 of the converter 2 through the coaxial cable 4 as a DC power supply for the converter 2 for circular and linear polarization. Is done.

Since the DC power supplied through the output connector 26 is +8 V, the intermediate-frequency signal obtained by converting the BS television broadcast signal is used for the That is, the BS-IF signal is output from the output connector 26. This BS-IF signal is
The signal is input to the antenna input terminal 5a of the selector 5 via the coaxial cable 4 and passes through the selector 5 to the BS output terminal 5b.
And input to the BS input terminal 6a of the BS / CS tuner 6 via the coaxial cable 7. And BS
The / CS tuner 6 processes the input BS-IF signal, demodulates it into the video signal and audio signal of the selected BS broadcast channel, and supplies this to the receiver.

On the other hand, when a channel is selected in the BS / CS tuner 6 so as to view a CS broadcast using a vertically polarized wave for transmission of a broadcast wave, the CS input terminal 6b as shown in FIG. , A DC voltage of + 11V is output, and this DC voltage is supplied to the CS output terminal 5 c of the selector 5 via the coaxial cable 8. The selector 5 is
The DC voltage is output from the antenna input terminal 5a, and the antenna input terminal 5a and the CS output terminal 5c are connected in an AC manner. And the antenna input terminal 5
The DC voltage of +11 V output from the a is used as a DC power supply for the converter 2 for circular and linear polarization via the coaxial cable 4 and the output connector 2 of the converter 2 for circular and linear polarization.
6.

The converter 2 for circular and linear polarization uses the DC power supplied via the output connector 26 as + 11V.
Therefore, as described above, the intermediate frequency signal obtained by converting the CS (V) television broadcast signal, that is, the CS-IF
(V) A signal is output from the output connector 26. This CS
The −IF (V) signal is input to the antenna input terminal 5 a of the selector 5 via the coaxial cable 4, output from the CS output terminal 5 c via the selector 5, and output from the BS / CS tuner 6 via the coaxial cable 8. The signal is input to the CS input terminal 6b. The BS / CS tuner 6 processes the input CS-IF (V) signal and demodulates it into the video signal and the audio signal of the selected CS broadcast channel (using the vertical polarization). Is supplied to the receiver.

When a channel is selected in the BS / CS tuner 6 so as to view a CS broadcast that uses horizontal polarization for transmission of a broadcast wave, as shown in FIG. 5C, the CS input terminal 6b And a DC voltage of +15 V is output from the controller 5, and the DC voltage is supplied to the CS output terminal 5 c of the selector 5 via the coaxial cable 8. The selector 5 is
The DC voltage is output from the antenna input terminal 5a, and the antenna input terminal 5a and the CS output terminal 5c are connected in an AC manner. And the antenna input terminal 5
The DC voltage of +15 V output from a is used as a DC power source for the circular / linear polarization converter 2 via the coaxial cable 4 to provide an output connector 2 of the circular / linear polarization converter 2.
6.

Since the DC power supplied to the output connector 26 is +15 V, as described above, the intermediate frequency obtained by converting the CS (H) television broadcast signal Signal, ie CS-IF (H)
The signal is output from the output connector 26. This CS-IF
(H) The signal is input to the antenna input terminal 5 a of the selector 5 via the coaxial cable 4,
The signal is output from the S output terminal 5 c and input to the CS input terminal 6 b of the BS / CS tuner 6 via the coaxial cable 8. Then, the BS / CS tuner 6 receives the input CS.
-Process the IF (H) signal to demodulate it into a video signal and an audio signal of the selected CS broadcast channel (using horizontal polarization), and supply this to the receiver.

As described above, according to the first embodiment, the converter 2 for circularly and linearly polarized waves transmits a circularly polarized BS broadcasting electric wave, a linearly polarized CS broadcasting electric wave, and a CS broadcasting electric wave. Has a reception probe 30 for receiving broadcast waves of vertically polarized waves and horizontally polarized waves, and a circuit for converting each television broadcast signal obtained from the reception probe 30 to each intermediate frequency signal. Therefore, the BS broadcast wave (circularly polarized wave) is generated by the single circular / linear polarized wave converter 2.
And CS broadcast radio waves (linear polarization (vertical polarization and horizontal polarization))
Can be received.

Further, since the receiving probe 30 and each circuit are formed on one dielectric plate 25, this circle
The converter 1 can be accommodated in, for example, one housing, and the housing itself can be downsized. In addition, since the number of converters (housings) attached to the parabolic antenna 1 for receiving each broadcast wave of a broadcasting satellite and a communication satellite is only one (for one unit), two converters as shown in FIG. Converters 302
And 303, the size of the parabolic antenna 1 itself can be reduced, and the influence of wind and snow can be reduced.

Further, the voltage level of the DC power supply supplied to the circular / linear polarization dual-purpose converter 2 is selectively set to, for example, +8 V, +1 according to the channel selected on the receiving apparatus 3 side.
They are configured differently, such as 1V and + 15V. Then, according to the voltage level of the DC power supply, it is configured to automatically sort and process which of the BS broadcast radio wave and the CS broadcast radio wave (vertically polarized wave or horizontal polarized wave) to receive. I have. Therefore, only one coaxial cable 4 is required to connect the above-mentioned circular / linear polarization dual-use converter 2 to the receiving device 3 side.
In comparison with the prior art shown in FIG. 10 and FIG. 10, there is an effect that cable wiring work can be simplified. And
This effect becomes more remarkable as the distance from the converter 2 (parabolic antenna 1) to the BS / CS tuner 6 increases.

In the first embodiment, the patch elements 130 are provided on the power supply probes 30a and 30b for receiving the BS broadcast radio wave of the converter 2 for circular and linear polarization, but the power supply probes 30a and 30b If the standing wave ratio, the main polarization directivity, the cross polarization directivity, and the like satisfy sufficient specifications for receiving BS broadcast radio waves, the patch element 130 may not be provided. Also, the patch element 130
Even if you provide a, the shape and location
As long as the above specifications are satisfied, the present invention is not limited to the above-described approximate square shape and location.

Then, in the circular / linear polarization shared converter 2, the BS-IF signal, the CS-IF (V) signal,
As to which of the S-IF (H) signals is to be output, the comparison circuits 63 and 65 compare and determine the voltage level of the DC power supply, and distribute the driving power supply to be supplied to each circuit based on the determination result. Was used to select the output, but the present invention is not limited to this. For example, a so-called signal switching means such as a relay or an analog switch may be provided, and the output of each of the intermediate frequency signals may be selected by the switching. In other words, the circuit configuration of the converter 2 for circular and linearly polarized waves may be a circuit configuration other than that of FIG.

In FIG. 1, the dielectric plate 2
5 shows a state in which the receiving probe 30 and the circuits constituting the circular / linear polarization dual-purpose converter 2 are arranged on one surface (the front side of the paper surface shown in FIG. 1). Alternatively, the dielectric plate 25 may be disposed using both sides (both sides mounted). Although the receiving probe 30 and each circuit are formed on one dielectric plate 25, the receiving probe 30 and each circuit may be separated and formed on separate dielectric plates.

Then, the voltage levels of the DC power supplied from the output connector 26 are set to +8 V, +11 V and +
Although the voltage is set to 15 V, the voltage is not limited to these values as long as the voltage level can be reliably determined.

In the receiving device 3, the selector 5
, A BS / CS tuner 6 capable of receiving broadcast waves from both broadcast satellites and communication satellites was connected.
Alternatively, a so-called BS tuner dedicated to receiving BS broadcast radio waves and a so-called CS tuner dedicated to receiving CS broadcast radio waves may be separately connected. In this case, the input terminal of the BS tuner is connected to the BS output terminal 5b of the selector 5, and the input terminal of the CS tuner is connected to the C terminal of the selector.
Connect to S output terminal 5c. Further, it is not necessary to connect both the BS tuner and the CS tuner, and only one of them may be connected.

Then, in selector 5, BS / C
Although the DC power supplied to the circular / linear polarization dual-purpose converter 2 is generated using the DC voltage supplied from the S tuner 6, the present invention is not limited to this, and is different from the DC voltage supplied from the BS / CS tuner 6. The power source may be obtained from a power source such as a commercial AC voltage or a battery, and the DC power source may be generated based on the power source.

Further, the selector 5 and the BS / CS tuner 6
Are connected to each other by the coaxial cables 7 and 8, but the selector 5 may be built in the BS / CS tuner 6.

As shown by reference numeral 1b in FIG. 2, the reflecting mirror 1 is driven by the driving force of the motor in response to the selection of the channel of the BS / CS tuner 6, for example.
A so-called motor mount 1b that changes the direction of a, that is, the elevation angle and the azimuth angle may be provided. As a result, it is possible to always receive both broadcast radio waves with high sensitivity without worrying about the directions of arrival of the BS broadcast radio waves and the CS broadcast radio waves.

Further, in the first embodiment, the converter and the receiving device for receiving the BS broadcast radio wave transmitted from the broadcast satellite and the CS broadcast radio wave transmitted from the communication satellite have been described, but the present invention is not limited to this. . That is, the above B
Regarding a converter and a receiving device that receive both circularly polarized and linearly polarized waves other than S broadcast waves and CS broadcast waves,
The present technology can be applied.

Further, as in the first embodiment, instead of receiving each broadcast wave from a broadcast satellite and a communication satellite having different directions of arrival of the circularly polarized wave and the linearly polarized wave, for example, one broadcast wave is received. In this case, it is not necessary to set the angle of the parabolic antenna 1 in accordance with the received radio wave. Therefore, both circularly polarized light and linearly polarized light can be received more easily, that is, the effects of the first embodiment can be more effectively exhibited.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG.
FIG. 3 is a diagram showing an internal circuit configuration of a circular / linear polarization shared converter 2 according to the embodiment.

As shown in the drawing, the circular / linear polarization dual-purpose converter 2 is different from the circuit configuration of the first embodiment shown in FIG. 1 in that a second output connector 70 and a second And an input / output circuit 80 connected to the output connector 70. As will be described later, the second output connector 70 is configured to be supplied with a DC power from the outside, and this DC power is supplied to the comparison circuit 63. The comparison circuit 63 compares and determines the voltage levels of the DC power supply from the second output connector 70 and the DC power supply from the output connector 26, and determines the level of each circuit (the low noise amplifier 32, the local oscillator 35 And a comparator circuit 65) is supplied with a DC voltage of +5 V from the power supply unit 62, and controls switching of a switch 81, which is a component of the input / output circuit 80. Since the other configuration is the same as that of the first embodiment, the same reference numerals are given to the same parts, and the detailed description is omitted.

That is, the input / output circuit 80 is composed of the switch 81, the smoothing coil 82, the intermediate frequency amplifier 83, and the DC cut capacitor 84, as shown by a two-dot chain line in FIG. . Among them, the switch 81 is formed of, for example, a diode switch.
It is interposed between the output side of the mixer 34 for detecting the BS television broadcast signal and the input side of the intermediate frequency signal 42, and is provided in a state where the two are short-circuited or opened. And
The smoothing coil 82 is connected in series between the second output connector 70 and the comparison circuit 63. The input side of the intermediate frequency amplifier 83 is connected to the output side of the mixer 34, and the output of the mixer 34, that is, the BS-I
It is configured to amplify the F signal with a gain of about 30 to 40 dB which is equivalent to that of the intermediate frequency amplifier 42, for example. The intermediate frequency amplifier 83 is supplied with a stable DC voltage of +5 V from the power supply unit 62 as a driving power supply, similarly to the intermediate frequency amplifier 42. The output side of the intermediate frequency amplifier 83 is connected to the second output connector 70 via a DC cut capacitor 84.

Further, as the second output connector 70,
For example, a coaxial cable C15 similar to the output connector 26
The second output connector 70 is configured to be supplied with DC power from the outside. As the DC power supply supplied to the second output connector 70, a DC voltage having a selectively different voltage level,
For example, a DC voltage having a voltage level of either +15 V or 0 V is supplied. This DC power supply is configured to be supplied to the comparison circuit 63 via the smoothing coil 82. The second output connector 70
Corresponds to the second output terminal described in the claims,
The voltage levels of, for example, +15 V and 0 V of the DC power supplied from the outside through the output connector 70 correspond to the fourth and fifth voltage levels described in the claims.

In addition to the operation described in the first embodiment, the comparison circuit 63 operates when the voltage level of the DC power supplied from the second output connector 70 via the smoothing coil 82 is about + 15V. And whether the voltage is about 0 V (that is, the DC power is not supplied). Then, when it is determined that the voltage level of the DC power supply is about +15 V, regardless of the voltage level of the DC power supply supplied from the output connector 26 side, the +
A 5 V DC voltage is supplied to the low-noise amplifier 32 and the local oscillator 35 on the BS broadcast radio wave (circularly polarized wave) receiving side as drive power supplies for each. The voltage level of the DC power supplied from the second output connector 70 is about + 15V.
The switch 81 is opened only when it is determined that the voltage level of the DC power supply supplied from the output connector 26 side is equal to or higher than +11 V, and in other cases, the switch 81 is short-circuited. Switch 81
Is switched.

Therefore, in the circular / linear polarization shared converter configured as described above, the output connector 2
6 is supplied with + 8V DC power and the + 15V DC power is supplied to the second output connector 70, the intermediate frequency amplifiers 42 and 83, the low noise amplifier 32 on the BS broadcast radio wave (circularly polarized wave) receiving side and Each drive power supply (+5 V DC voltage from the power supply unit 62) is supplied to the local oscillator 35, and the switch 81 is short-circuited (ON).
Therefore, in this state, the BS-IF signal is output from both the output connector 26 and the second output connector 70.

Also, when +8 V DC power is supplied to the output connector 26 and the voltage level of the DC power supplied to the second output connector 70 is 0 V (the DC power is not supplied), Frequency amplifiers 42 and 83, B
Low noise amplifier 32 and local oscillator 3 on the S broadcast radio wave receiving side
5, the respective drive power is supplied, and the switch 81 is short-circuited (ON). Therefore, also in this case, the BS-IF signal is output from both the output connector 26 and the second output connector 70.

On the other hand, +11 V or +
15V DC power is supplied to the second output connector 70
Are supplied with DC power of +15 V, the intermediate frequency amplifiers 42 and 83, the low noise amplifier 36 or 37 on the receiving side of the CS broadcast radio wave (linearly polarized wave), and the low noise amplifier 38 at the subsequent stage.
The local oscillator 41 and the low-noise amplifier 32 and the local oscillator 35 on the BS broadcast wave (circularly polarized wave) receiving side are supplied with respective driving power supplies. Then, in this case, the switch 81 is in an open state (OFF). Accordingly, in this state, the CS-IF (V) signal or the CS-IF (H) signal is output from the output connector 26, and the BS-IF signal is output from the second output connector 70.

When +11 V or +15 V DC power is supplied to the output connector 26 and the voltage level of the DC power supplied to the second output connector 70 is 0 V (DC power is not supplied). , Intermediate frequency amplifier 4
2, 83, the low-noise amplifier 36 or 37 on the CS broadcast wave receiving side, the low-noise amplifier 38 at the subsequent stage, and the local oscillator 41 are supplied with the respective driving signals and the switch 81
Is in a short-circuit state (ON). Therefore, in this state, the CS-IF (V) signal or the CS-IF (H) signal is output from both the output connector 26 and the second output connector 70.

That is, the controlled state of the switch 81 with respect to the voltage level of the DC power supplied from the outside to the output connectors 26 and 70, and the output connectors 26 and 70
Table 1 shows the relationship between the intermediate frequency signals output from 0.

[0089]

[Table 1]

As can be seen from the table, the output connector 26
Is supplied with a DC power of +8 V, +11 V or +15 V from the outside.
S-IF signal, CS-IF (V) signal or CS-IF
(H) When a +15 V DC power is externally supplied to the second output connector 70 while the signal is being output,
From the second output connector 70, a BS-IF signal is output. When the voltage level of the DC power supplied to the second output connector 70 is 0 V (DC power is not supplied), the second output connector 70
From this, the same intermediate frequency signal as each of the intermediate frequency signals output from the output connector 26 is output, that is, the output of the converter 2 is split into two.

Incidentally, the circular / linear polarization shared converter 2 according to the second embodiment is used, for example, in a configuration as shown in FIG. That is, the output connector 26 of the circular / linear polarization shared converter 2 is connected via the coaxial cable 4 to the receiving device 3 (the antenna input of the selector 5) in the same manner as in the first embodiment shown in FIG. Terminal 5a)
Connect to On the other hand, the second output connector 70 is connected to a receiver 13 different from the receiver 3 via one cable, for example, the coaxial cable 10.

The receiving device 13 includes a switch 15 and a BS / CS
A tuner 16 and a cable connecting them together,
For example, it is constituted by coaxial cables 17 and 18 and installed indoors, for example, like the receiving device 3.

The switch 15 has an antenna input terminal 15
a, and the second output connector 7 of the circular / linear polarization dual-use converter 2 is connected to the antenna input terminal 15a.
0 is connected via the coaxial cable 10. Also,
The switch 15 has two output terminals, a BS output terminal 15b and a CS output terminal 15c, and connects the antenna input terminal 15a to one of the two output terminals 15b and 15c. The switch 15d can be manually switched, for example. It should be noted that the connection between the CS output terminal 15c and the antenna input terminal 15a is configured to be an AC connection.
It is configured to be connected via a DC cut capacitor 15e.

On the other hand, the BS / CS tuner 16 is, for example, a device of the same standard as the BS / CS tuner 6 constituting the receiving device 3 described above. That is, when a channel is selected so as to view a BS broadcast, approximately +
When a DC voltage of 15 V is output and a channel is selected to watch a CS broadcast, about +1 is input from the CS input terminal 16b.
A DC voltage of 1 V or about +15 V is output.

The BS output terminal 1 of the switch 15
5b and the BS input terminal 16a of the BS / CS tuner 16 are connected to each other by a coaxial cable 17, and the CS output terminal 15c of the switch 15 and the CS input terminal 15b of the BS / CS tuner 16 are connected to each other by a coaxial cable 18. .

That is, according to this configuration, in the switch 15, the antenna input terminal 15a is connected to the BS output terminal 15a.
When the changeover switch 15d is switched to connect to the b side, the second output connector 70 of the circular / linear polarization dual-purpose converter 2 and the BS input terminal 1 of the BS / CS tuner 16 are connected.
6a is connected. On the other hand, when the changeover switch 15d is switched so as to connect the antenna input terminal 15a to the CS output terminal 15c, the second output connector 70 and the CS input terminal 15b of the BS / CS tuner 16 are AC-connected. .

Now, in the above configuration, the output connector 26
It is assumed that a channel is selected by the BS / CS tuner 6 on the side of the receiving device 3 connected to, to view a BS broadcast or a CS broadcast.

In this state, the antenna input terminal 15a and the BS output terminal 15b of the switch 15 are connected to each other, that is, the second
So that the output connector 70 is connected to the BS input terminal 16a of the BS / CS tuner 16.
5 is changed over. And BS /
The CS tuner 16 selects a channel to view the BS broadcast. Thereby, the BS / CS tuner 16
, A DC voltage of +15 V is output from the BS input terminal 16a.
(Specifically, the output is supplied to the second output connector 70 of the converter 2) via the coaxial cable 10 and the BS output terminal 15b, the changeover switch 15d and the antenna input terminal 15a of the switch 15.

As described above, the converter 2 for both circular and linear polarization is used.
When a DC voltage of +15 V is supplied to the second output connector 70, the second output connector 70 has the second
From the output connector 70 of the BS / C connected thereto.
An intermediate frequency signal corresponding to the channel selection of the S tuner 16, that is, a BS-IF signal is output. From the other output connector 26, based on the relationship shown in Table 1 above, an intermediate frequency signal (BS-I-BS) corresponding to the channel selection of the BS / CS tuner 6 on the receiving device 3 side connected thereto.
It goes without saying that the F signal, the CS-IF (V) signal or the CS-IF (H) signal) is output.

Next, the antenna input terminal 15 of the switch 15
a and the CS output terminal 15c side are connected,
That is, the second output connector 70 of the circular / linear polarization shared converter 2 and the CS input terminal 16b of the BS / CS tuner 16
The switch 15d of the switching unit 15 is switched so that is connected in an AC manner via the DC cut capacitor 15e. Then, the BS / CS tuner 16 sets C
Select a channel to watch S broadcast. As a result, a DC voltage of +11 V or +15 V is output from the CS input terminal 16 b of the BS / CS tuner 16. However, as described above, the CS input terminal 16b and the second
Is in an AC connection state with the output connector 70 of
The DC voltage output from the CS input terminal 16b is not supplied to the second output connector 70.

As described above, the converter 2 for both circular and linear polarizations is used.
When the DC voltage is not supplied to the second output connector 70 (that is, when the level of the voltage supplied to the second output connector 70 is 0 V), this second From both the output connector 70 and the other output connector 26, an intermediate frequency signal (BS-IF signal, CS-CS signal) according to the channel selection of the BS / CS tuner 6 of the receiver 3 connected to the output connector 26. I
An F (V) signal or a CS-IF (H) signal is output. That is, in this case, the intermediate frequency signal corresponding to the channel selection of the BS / CS tuner 6 on the receiving device 3 side is 2
In a distributed state, the signals are output from the output connectors 26 and 70.

The intermediate frequency signals output from the output connectors 26 and 70 are transmitted to the coaxial cables 4 and 10 respectively.
Are supplied to the respective BS / CS tuners 6 and 16 through which they are demodulated into video signals and audio signals of the selected channels, respectively, and then supplied to a receiver (not shown).

As described above, according to the second embodiment, two output connectors 26, 70 are provided in one circular / linear polarization converter 2 and these output connectors 26, 70 are provided. , 70 output different intermediate frequency signals or the same intermediate frequency signal. Therefore, one circular / linear polarization shared converter 2
To simultaneously receive (view) both broadcasts (both polarizations) of BS broadcasts (circularly polarized waves) and CS broadcasts (linearly polarized waves (vertically polarized waves or horizontal polarized waves)), or BS broadcasts or CS broadcasts There is an effect that the two channels can be simultaneously received (viewed).

According to the circuit configuration shown in FIG. 6, a DC power supply is supplied only from the output connector 26 to the power supply section 62 for generating a drive power supply for each circuit. Therefore, when DC power is not supplied from the outside to the output connector 26 (that is, the BS / CS tuner 6 of the receiving device 3 connected to the output connector 26 selects a channel so that a BS or CS broadcast is viewed). Is not established), the driving power is not supplied to each of the circuits, so that the output connector 26 and the second output connector 70 are not supplied.
Does not output the intermediate frequency signal. That is, B on the receiving device 3 side connected to the output connector 26
If channel selection is not made by the S / CS tuner 6 to view BS or CS broadcasting, the BS / BS of the receiving device 13 connected to the second output connector 70
The CS and tuner 16 cannot view BS and CS broadcasts.

Therefore, by making the circuit configuration as shown in FIG. 8, for example,
Even if the channel is not selected by the S / CS tuner 6 to view the BS or CS broadcast, the receiving apparatus 1
The BS broadcast can be viewed by the BS / CS tuner 16 on the third side. That is, in the circuit shown in FIG. 8, the second output terminal 70 is connected to the power supply unit 62 via the smoothing coil 90 in the circuit shown in FIG. The power supply unit 62 is configured to supply a voltage of +5 V to the comparison circuit 63 and the intermediate frequency amplifier 83 regardless of which of the output connectors 26 and 70 a DC power supply is connected to.
When the voltage of +15 V is supplied to the output connector 70 and the voltage is not supplied to the output connector 26, the comparison circuit 63 outputs the low noise amplifier 32 and the local oscillator 35.
, And the switch 81 is opened.

With the above configuration, when DC power is supplied from the outside to the output connector 26 (that is, the channel is set so that the BS / CS broadcast is viewed by the BS / CS tuner 6 of the receiver 3 side). Is selected), the DC power is supplied to the power supply unit 62. In this case, as described above, both BS / CS tuners 6, 1
6 allows the user to view BS or CS broadcasts. On the other hand, when the DC power is not supplied to the output connector 26 (ie, even when the channel is not selected by the BS / CS tuner 6 of the receiving device 3 so as to view the BS or CS broadcast), the second Is supplied with DC power from the outside to the output connector 70 (that is, B
When a channel is selected by the S / CS tuner 16 to view a BS broadcast), the second output connector 70
Is supplied to the power supply unit 62 so that the BS broadcast can be viewed by the BS / CS tuner 16 of the receiving device 13 irrespective of the channel selection of the BS / CS tuner 6 of the receiving device 3.

In the second embodiment and its modification, the BS / CS tuner 16 capable of receiving both the BS and CS broadcasts is used as the tuner constituting the receiving device 13. However, the present invention is not limited to this. A BS tuner for receiving a BS broadcast and a tuner for receiving a CS broadcast are used, and each of the BS output terminal 15b and the CS output terminal 15c of the switch 15 is used.
May be connected.

As shown in FIG. 7, the second output connector 70 of the circular / linear polarization shared converter 2 is connected to the BS / C
The BS input terminal 16a and the CS input terminal 15b of the S tuner 16 are connected via the switch 15, but they may be directly connected without using the switch 15. That is, in the above-described BS / CS tuner 16, generally, whether or not to output a DC voltage from the BS input terminal 16a and the CS input terminal 16b can be freely set by, for example, a changeover switch (not shown). It is configured. Therefore, when a channel is selected by the BS / CS tuner 16 to view a BS broadcast, the changeover switch is set to output a DC voltage from the BS input terminal 16a, and the BS input terminal 16a and the circular / straight line are set. A second output connector 70 of the dual-polarization converter 2;
They are directly connected by a coaxial cable 10. On the other hand, this BS
When a channel is selected by the / CS tuner 16 to view a CS broadcast, the changeover switch is set so that no DC voltage is output from the CS input terminal 16b, and the CS input terminal 16b is used for both circular and linear polarization. The second output connector 70 of the converter 2 is directly connected by the coaxial cable 10. With this configuration, the same operation as the configuration shown in FIG. 7 can be achieved without using the switch 15.

If the same operation and effect as those of the second embodiment can be obtained, the circuit configuration of the dual-circular / linear polarization converter 2 needs to be the configuration shown in FIGS. There is no.

[0110]

According to the present invention, a circular / linear polarized wave converter that can be connected to the receiving apparatus of the present invention has a BS broadcast wave (circularly polarized wave), a CS broadcast wave (linearly polarized wave), Further C
For the S broadcast wave, a reception probe for receiving each of the vertically polarized wave and the horizontally polarized broadcast wave is arranged. Then, signals obtained from the receiving probe are converted into intermediate frequency signals, that is, BS-IF signals, CS-IF (V) signals, and C-IF (V) signals.
The signal is converted into an S-IF (H) signal, output from one output terminal (first output terminal), and which of these intermediate frequency signals is output is determined by externally connecting to the first output terminal. It is configured to be selected according to the voltage level of the supplied DC power supply. That is, which of the BS broadcast radio waves (circularly polarized waves) and the CS broadcast radio waves (linearly polarized waves (vertically polarized waves and horizontal polarized waves)) is received by the DC power supply supplied to the first output terminal. Can be controlled, and the intermediate frequency signal can be output from a common output terminal (first output terminal). Therefore, the respective intermediate frequency signals (BS-IF signal, CS-IF (V) signal and CS-IF (H) signal) can be supplied to the receiving device side, for example, the tuner side, with one cable. Thus, there is an effect that the wiring work of the cable can be simplified as compared with the related art. This effect becomes more remarkable as the distance from the converter (parabolic antenna) to the tuner increases. Furthermore, the receiving probe (first
To the fourth power supply probe), the first to third conversion means, and the output control means are formed in a single dielectric plate. Therefore, the circular / linear polarization dual-use converter capable of receiving a plurality of different polarized waves as described above can be accommodated in, for example, one casing, so that the casing provided for one parabolic antenna is provided. Only one body can be used. In addition, as shown in FIG.
The parabolic antenna itself can be reduced in size compared to the conventional technology in which two converters 302 and 303 (two housings) are provided for the base parabolic antenna 301,
There is an effect that the influence of wind, snow and the like can be reduced. Further, since the converter for both circular and linear polarization is formed on one dielectric plate, the housing itself of the converter for both circular and linear polarization can be downsized.

[0111]

[0112]

The receiving apparatus of the present invention can be connected to a circular / linear polarization shared converter capable of receiving a plurality of different polarized waves as described above, and has a first output terminal of the converter. Connectable input terminals and second and third input terminals
Has two output terminals. Then, according to a DC voltage externally supplied to the third or fourth output terminal, a DC power supply corresponding to the first, second, or third voltage level is output from the input terminal, and , An intermediate frequency signal (BS-IF signal, CS-IF (V) signal or CS-IF (H) signal) input through this input terminal
Are automatically assigned to be output from one of the third and fourth output terminals. Therefore, only one cable is required to connect the input terminal of the receiving apparatus and the first output terminal of the circular / linear polarization converter.

[Brief description of the drawings]

FIG. 1 is an electric circuit block diagram showing a first embodiment of a dual-polarization / linear polarization converter according to the present invention, showing a state where the electric circuit is formed on a dielectric plate.

FIG. 2 is a schematic configuration diagram showing a connection state between the circular / linear polarization dual-use converter and the receiving device according to the embodiment.

FIG. 3 is an external view (side view) of the circular / linear polarization dual-purpose converter according to the embodiment.

FIG. 4 is an electric circuit diagram of a selector according to the embodiment.

FIGS. 5A and 5B are diagrams showing operating states of a converter for circular / linear polarization, a selector, and a BS / CS tuner according to the embodiment, wherein FIG. 5A shows BS broadcasting, and FIG. 5B shows CS (vertical polarization).
FIG. 3C is a diagram illustrating a case where a CS (horizontal polarization) broadcast is received, respectively.

FIG. 6 is an electric circuit block diagram showing a second embodiment of a dual-polarization / linear polarization converter according to the present invention, showing a state where the electric circuit is formed on a dielectric plate.

FIG. 7 is a schematic configuration diagram showing a connection state between the circular / linear polarization shared converter and the receiving device in the same embodiment.

8 is a diagram showing an example in which the electric circuit shown in FIG. 6 is further applied.

FIG. 9 is a schematic configuration diagram of a conventional receiving apparatus, which uses two parabolic antennas, a BS broadcast radio wave receiving antenna and a CS broadcast radio wave receiving antenna.

FIG. 10 is a schematic configuration diagram of a conventional receiving apparatus, in which BS / CS
This uses a shared antenna.

[Explanation of symbols]

 Reference Signs List 25 dielectric plate 26 output connector 30 reception probe 30a, 30b, 30c, 30d power supply probe 32, 36, 37, 38 low noise amplifier 34, 40 mixer 35, 41 local oscillator 42 intermediate frequency amplifier 62 power supply section 63, 65 comparison circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI H01Q 13/08 H01Q 13/08 21/24 21/24 21/30 21/30 H04B 1/18 H04B 1/18 K (58) Field surveyed (Int.Cl. ⁷ , DB name) H03D 9/06 H01P 1/10 H01P 1/161 H01P 1/17 H01P 5/08 H01Q 13/08 H01Q 21/24 H01Q 21/30 H04B 1/18

Claims (1)

(57) [Claims] 1. A dielectric plate, and is disposed on one surface of the dielectric plate so as to radially extend from the predetermined point at an interval of approximately 90 degrees in a circumferential direction around a predetermined point. First to fourth power supply probes, and of the power supply probes, one of the first and second power supply probes adjacent to each other in the circumferential direction is approximately λg / 4
(Λg is a transmission wavelength) A receiving probe connected by transmission lines having different lengths, and a circularly polarized receiving signal obtained by both the first and second feeding probes are converted into a first intermediate frequency signal. First conversion means; second conversion means for converting a first linearly polarized reception signal obtained from the third power supply probe into a second intermediate frequency signal; A third conversion means for converting the received signal of the second linear polarization into a third intermediate frequency signal, a first output terminal to which a DC power supply having a different voltage level is selectively supplied from the outside, When the voltage level of the DC power supply corresponds to a predetermined first voltage level, the first intermediate frequency signal is output from a second predetermined voltage level of the DC power supply that is different from the first voltage level. When dealing with voltage levels, 2
When the voltage level of the DC power supply corresponds to a predetermined third voltage level different from the first and second voltage levels, the third intermediate frequency signal is
An output control means for outputting the signals from the first output terminal, respectively. A receiving device connectable to a circular-polarized / linearly-polarized wave reception shared converter, comprising: an input connectable to the first output terminal. A third terminal, a third and a fourth output terminal to which a DC voltage is supplied to one of the external terminals, and a signal input from the input terminal to the third and fourth terminals.
Switching means for switching to a state of outputting from the output terminal on the side to which the DC voltage is supplied, among the output terminals, wherein the DC voltage supplied to the fourth output terminal has a voltage level of And when the DC voltage is supplied to the third output terminal,
A DC power supply corresponding to the first voltage level is output from the input terminal, and when the DC voltage having the sixth or seventh voltage level is supplied to the fourth output terminal, each of the second and third voltage levels is supplied. Alternatively, a DC power supply output means for outputting a DC power supply corresponding to a third voltage level from the input terminal is provided.