JPH10224269A - Highly reliable radio receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely switch a standby system and to monitor a 2nd reception low-noise amplifier (RA) in the standby system in the case occurring a fault in a 1st (RA) or its cooling means. SOLUTION: A pilot signal, having a frequency within an attenuation band of 1st and 2nd reception hand filters 4, 14, is inputted from a pilot signal generating means 21 to 1st and 2nd RAs, each output is taken out from 1st and 2nd distribution means 24, 25 and each level is detected by using 1st and 2nd level detection means 26, 27. A control means 28 switches 1st and 2nd signal changeover means (SW) 3, 6, when each detection level is below a threshold and transmits a 1st or 2nd alarm signal. A manual changeover means for the 1st and 2nd signal changeover means is provided in the control means 28. Furthermore, the 1st reception band filter 4 is composed of a superconducting material and is made into a superconducting state by a cooling means 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-reliability wireless receiver which is applied to, for example, a base station receiving apparatus for mobile communication and satellite communication and cools a high-frequency receiving section to receive a desired signal.

[0002]

2. Description of the Related Art FIG. 10 shows a basic configuration of a conventional highly reliable radio receiver. This conventional high-reliability wireless receiver includes an antenna 1, an antenna feeder 2 for transmitting a signal received by the antenna 1, a first switching unit (SW) 3 for switching an output of the antenna 2, and a first SW3. A first reception bandpass filter (RXF) 4 for selecting a signal in a desired band, and a first reception low noise amplifier (RA) 5 for amplifying the output of the first RXF4 to a desired level with low noise, connected to one side.
And a second switching means (SW) 6 to which an output signal of the first RA 5 is inputted to one input terminal, and an output terminal 7 for outputting a signal outputted by the second SW 6. Of the terminals of the second SW 6, terminals that are not connected to the output terminal 7 are terminated by terminators 8 and 9.

[0003] The first RXF 4 and the first RA 5 are sealed in a heat shield box 10, insulated from the outside, and cooled by cooling means 11. Further, a first power supply terminal 12 for supplying power to the first RA 5 and a second power supply terminal 13 for supplying power to the cooling means 11 are provided. Although not shown here, the first RXF 4 and the first R
An isolator may be provided between A5 and A5 in order to achieve matching.

A second reception bandpass filter (RXF) 14 connected to the other terminal of the first SW 3 and a second reception band filter (RXF) 14
A second amplifying the output signal of the RXF 14 to a desired level
A receiving low noise amplifier (RA) 15 is provided, and a second RA1
5 is input to the other input terminal of the second SW6. Here, the frequency bands of the second RXF 14 and the second RA 15 are the same as those of the first RXF 4 and the first RA 5. Power is supplied to the second RA 15 through the third power supply terminal 16, and the first SW 3 and the second SW 6 are simultaneously switched to the position of the solid line or the dotted line by the control signal input through the control terminal 17. Normally, the first SW3 and the second SW6 are also connected as indicated by solid lines. Further, the first SW 3, the heat shielding box 10, the cooling means 11, the second SW
6, the second RXF 14 and the second RA 15 are housed in the housing 18.

The first RXF 4 and the first RA 5 are sealed in a heat shielding box 10 such as a Dewar bottle, and are stably cooled to an extremely low temperature of, for example, about several tens K for a long time by the cooling member 11 a of the cooling means 11. Here, the cooling means 11 is composed of, for example, a cryogenic refrigerator using a heat exchange cycle by compression and expansion of helium gas, and these can be commercially available products.

Thus, the first RXF4 and the first RA5
The first R
The thermal noise generated in the XF4 and the first RA5 can be reduced to the utmost, and even if the number of stages constituting the first RXF4 is increased, the loss can be reduced due to the low temperature, so that the attenuation characteristics can be sharpened. As a result, by using the configuration shown in FIG. 10, even for a low-level received signal,
For example, a reception output with a specified C / N ratio (carrier power / noise power) can be obtained. Also, the specified C / N
The transmission power on the transmission side required to obtain the specific reception output can be small.

Next, the operation of this highly reliable radio receiver will be described. When an operation abnormality occurs in the first RA5, the received signal transmitted from the output terminal 7 is significantly deteriorated or falls into a state where reception is impossible. Therefore, for example, a reception signal from the output terminal 7 is monitored by an indoor device (not shown),
When it is determined that the received signal is significantly degraded or unreceivable, a control signal is sent from the indoor device through the control terminal 17, and switching is performed so that both the first SW3 and the second SW6 are in the state of the dotted line. At this time, the signal from the antenna 1 is supplied to the output terminal 7 through the second RXF 14 and the second RA 15. That is, the first RXF4
And the second RXF 14 and the second
The signal will be received through RA15. 2nd R
The XF 14 and the second RA 15 are configured not to be cooled. Although the noise figure is not improved by the cooling as compared with the case of the first RXF 4 and the first RA 5, the XF 14 and the second RA 15 can be configured inexpensively and simply and avoid a state where reception is impossible. Becomes possible.

[0008]

In the conventional high-reliability radio receiver, as a method for detecting an operation abnormality when a failure occurs in the first RA5, the level of a signal received from the output terminal 7 is observed and the level is reduced. There is a method of judging that the operation is abnormal by using However, such an operation abnormality detection function that depends on the level of the received signal is performed, for example, on a fixed line where the transmission / reception equipment does not move, because the level of the received signal is constant because the level of the received signal is constant. However, in a mobile communication system base station apparatus such as a cellular phone or a mobile phone, the reception signal level greatly changes because the communication partner is constantly moving, so that the first RA5 operation abnormality is detected. There is a problem that it cannot be detected due to a decrease in the level of

Further, in the conventional high-reliability radio receiver, not only the failure occurring in the cooling means 11 cannot be directly detected, but also the second RA 15 which operates as a standby system when a failure occurs in the first RA 5. However, there is a problem that there is no means for confirming whether it is normal, that is, whether it functions properly as a standby system.

[0010] An object of the present invention is to provide a first reliable radio receiver.
When a failure occurs in the RA 5 or the cooling means 11, it is possible to avoid a state in which reception is not possible by reliably switching to the standby system, and to prevent the second system being the standby system.
An object of the present invention is to provide a highly reliable wireless receiver capable of monitoring the operation of the RA15.

[0011]

[Means for Solving the Problems]

(1) The invention according to claim 1 is connected to an antenna, an antenna feeder, a first signal switching means to which a signal from the antenna feeder is input and switched by a control signal, and one of the first signal switching means. A first reception bandpass filter, a first reception low noise amplifier connected to the first reception bandpass filter, and a second signal switching means provided on the output side of the first reception low noise amplifier and switched by a control signal And an output terminal for outputting an output signal from the second signal switching means, a second reception band filter connected to the other connection terminal of the first signal switching means, and a second reception band filter connected to the second reception band filter. , A second reception low-noise amplifier connected to the other connection terminal of the second signal switching means, wherein the first reception band-pass filter and the first reception low-noise amplifier are enclosed in a heat shielding box. It is cooled by the cooling means, first receiving a low-noise amplifier, the first respectively the cooling means and the second reception low noise amplifier, to a high radio receiver operating power through the second and third power terminal is supplied.

According to the present invention, a pilot signal generating means for generating a pilot signal having a frequency within the attenuation band of the first and second reception band filters is provided between the first reception band filter and the first reception low noise amplifier. First pilot signal injection means inserted into the path, second pilot signal injection means inserted into the path between the second reception bandpass filter and the second reception low noise amplifier, and the output of the first reception low noise amplifier Between the first side and the second signal switching means, the first distribution means inserted outside the heat shielding box, and the second distribution means inserted between the output side of the second reception low noise amplifier and the second signal switching means. Two distribution means are provided.

Further, first level detecting means for detecting the level of the pilot signal from the signal distributed by the first distributing means, and second level detecting for detecting the level of the pilot signal from the signal distributed by the second distributing means. Means for comparing the level of the pilot signal detected by the first level detection means with a preset threshold value, and when the level of the pilot signal is lower than the threshold value, switching between the first and second signals. Switching the means and transmitting a first alarm signal, comparing the level of the pilot signal detected by the second level detection means with a threshold value, and when the level of the pilot signal is lower than the threshold value, Control means for transmitting a signal and manual switching means for manually switching the first and second signal switching means in the control means are provided.

The first reception bandpass filter is made of a superconducting material, and is brought into a superconducting state by cooling means. (2) In the invention of claim 2, in the above (1), the first
In addition, a common power supply terminal is provided in place of the third power supply terminal, and the power supplied from the common power supply terminal is distributed by the power distribution unit and supplied to the first and second reception low noise amplifiers.

(3) According to the third aspect of the present invention, the second power supply terminal of (2) is deleted, and the operating power is also supplied from the power distribution means to the cooling means. (4) In the invention of claim 4, in the above (1), the first
And a power separation filter inserted between the second signal switching means and the output terminal, wherein the power separation filter separates the operating power supplied through the output terminal from the high-frequency reception signal, and the power separation filter. Power stabilization means is provided for stabilizing the power separated by the filter and supplying the stabilized power to the first and second receiving low noise amplifiers.

(5) In the invention of claim 5, in the above (4), the second power supply terminal is deleted, and the operating power is supplied from the power stabilizing means to the cooling means. (6) In the invention according to claim 6, in any one of the above (1) to (5), a temperature detecting means for detecting a temperature in the heat shielding box is provided, and the control means is provided in the heat shielding box by the temperature detecting means. When the temperature information is equal to or higher than a predetermined temperature, the first and second signal switching means are switched and a third alarm signal is transmitted.

(7) In the invention of claim 7, in the above (6), the temperature detecting means detects the temperature of the first receiving bandpass filter, the first receiving low noise amplifier or the cooling member of the cooling means in the heat shielding box. I do. (8) In the invention of claim 8, in any one of the above (1) to (7), a common level detecting means is provided instead of the first and second level detecting means, and the first and second level detecting means are provided.
Third signal switching means for switching the signal from the distribution means and supplying the signal to the common level detection means is provided.

(9) In the ninth aspect of the present invention, in any one of the above (1) to (7), the superconducting material comprises a high-temperature superconductor. (10) According to the tenth aspect, the above (1) to (7)
In any one of the above, the antenna feeder is omitted, and the antenna is directly connected to the device housing.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
The same reference numerals are used to designate portions corresponding to those in FIG.
In this embodiment, a pilot signal generating means 21 for generating a pilot signal within the range of the attenuation band of the first RXF 4 and the second RXF 14 is provided outside the heat shielding box 10 and the pilot signal generated by the pilot signal generating means 21 is provided. A first pilot signal injecting means 22 and a second pilot signal injecting means 23 for injecting between the first RXF 4 and the first RA 5 and between the first RXF 14 and the second RA 15 are provided. Also, the first switch between the first RA5 and the second SW6.
Distributing means 24 is provided, and second distributing means 25 is provided between the second RA 15 and the second SW 6. Further, a first level detecting means 26 and a second level detecting means 27 for detecting the level of the pilot signal from the signals distributed by the first dividing means 24 and the second dividing means 25 are provided.

The output signals of the first level detecting means 26 and the second level detecting means 27 are input to the control means 28. Further, the control means 28 is provided with a manual switching means 29 for manually switching between the first SW3 and the second SW6.
Pilot signal generation means 21, first distribution means 24, second
The distribution unit 25, the first level detection unit 26, the second level detection unit 27, and the control unit 28 are housed in one case 18.

The first RXF 4 is made of a superconducting material, and differs from FIG. 10 in that the superconducting material is brought into a superconducting state by cooling by the cooling means 11. As the first level detecting means 26 and the second level detecting means 27, a selection level meter or the like can be used. The control means 28 is composed of a reference voltage generating means for generating a preset threshold voltage and a comparator, or a microprocessor as a basic circuit, an A / D converter, a ROM, a RAM, a D / A
In any configuration, while monitoring the signals from the first level detecting means 26 and the second level detecting means 27, the signals are compared with a preset threshold value, When it is low, it has a function of switching the first SW3 and the second SW6 and / or transmitting a predetermined alarm signal.

The first RXF 4 is formed of, for example, a microstrip line, and the ground layer and the signal line forming the microstrip line are both formed of a superconducting material, and these are brought into a superconducting state by cooling by the cooling means 11. Therefore, the thermal noise generated in the first RXF 4 is extremely small, and thus the noise figure of the receiver is improved.

Next, the operation of this embodiment will be described.
The pilot signal generated by the pilot signal generation means 21 is injected by the first pilot signal injection means 22. At this time, the frequency of the pilot signal is the first RXF4
, The injected pilot signal is reflected by the first RXF 4 and the first RA
5, the pilot signal is not radiated from the antenna 1, and there is no fear of interfering with other systems. The received signal to which the pilot signal is added is the first R
After being amplified by A5, the signal is distributed by the first distributor 24, and the level of the injected pilot signal is detected by the first level detector 26. The level of the detected pilot signal is monitored by the control means 28, and when it is lower than a preset threshold value, the first SW 3 and the second SW 6 are respectively switched from the solid line position to the dotted line position, and A first alarm signal indicating that a failure has occurred in the 1RA5 system is output through the terminal 30.

On the other hand, the pilot signal is injected by the second pilot signal injection means 23 in the same manner as the first pilot signal injection means, amplified by the second RA 15 and then distributed by the second distribution means 25 to obtain the second level detection means. Also at 27, the level of the injected pilot signal is detected. The level of the detected pilot signal is monitored by the control means 28. If the level is lower than a preset threshold value, a second alarm signal indicating that a failure has occurred in the system of the second RA 15 is output through the terminal 30. Is done.

The first SW3 and the second SW6 are manually operated.
A manual switching means 29 is provided in addition to the control means 28 so that the maintenance person can manually switch the second RXF 14 which is a standby system by operating the manual switching means 29 during maintenance and inspection. And the second RA1
The configuration is also such that the path can be switched to five. As described above, using a pilot signal independent of the received signal,
In addition, the first RA5 and the second RA1 are compared by comparing the level of the pilot signal with a preset threshold value.
5 can be reliably detected and an alarm signal indicating the occurrence of a failure can be transmitted. As a result, the system is switched to the standby system by the control unit 28 or the maintenance person operating the manual switching unit 29, so that a state in which reception is not possible even when the operation of the first RA 5 is abnormal or during maintenance / inspection can be avoided. .

Although FIG. 1 shows an example in which the first pilot signal injection means 22 is not cooled by the cooling means 11, the first pilot signal injection means 22 is not cooled by the cooling means 1.
1 may be used for cooling. As shown in FIG. 2, the operating power may be supplied to each of the first RA5 and the second RA15 through the common power supply terminal 12 'and the power distribution means 31 (claim 2). can do.

As shown in FIG. 3, a common power supply terminal 12 '
And the first RA5 and the second RA through the power distribution means 31.
Operation power may be supplied to each of the cooling means 11 in addition to the cooling means 11 (claim 3). In this case, the number of power supply terminals can be further reduced. As shown in FIG. 4, the antenna 1 is connected to the housing 1 without the antenna feeder 2.
8 (claim 10). By removing the antenna feeder 2 in this manner, the loss of the antenna feeder 2 can be reduced, and as a result, the noise figure of the entire receiver can be improved, so that the reception sensitivity is further improved. FIG. 4 is based on the embodiment of FIG. 1, but of course FIG.
It can be applied to the embodiment of FIG.

FIG. 5 shows an embodiment of a highly reliable radio receiver according to the present invention. According to the present invention, as compared with the embodiment of FIG. 1, instead of the first power supply terminal 12 and the third power supply terminal 16, a power separation filter 41 is provided between the second SW 6 and the output terminal 7 and inside the housing 18. And that the power stabilizing means 42 for stabilizing the output power of the power separation filter 41 is provided outside the heat shielding box 10.

As a method of supplying power to the first RA5 and the second RA15, a method of superimposing a DC or low-frequency current on a received signal and transmitting the signal indoors, that is, a phantom power supply method can also be used. In this embodiment, as a method of supplying power to the first RA5 and the second RA15, when phantom power is supplied, an indoor received signal demodulating means or the like is provided through a transmission line (not shown) connected to the output terminal 7. From there, a direct current or a low frequency current is supplied from the output terminal 7 to the power separation filter 41 through the transmission line. The power separation filter 41 is configured by a simple duplexer that separates a received signal from a DC or low-frequency current. Further, the power stabilizing means 42 includes a power separating filter 41.
Means for stabilizing the DC or low-frequency current separated by the DC and stably outputting a DC of a predetermined voltage.
It can be configured by a C-DC converter, a switching power supply, or the like. By doing so, there is an advantage that a highly reliable wireless receiver can be configured while reducing the number of indoor power cables. In this embodiment, the antenna feeder 2 is removed as shown in FIG.
May be applied to a configuration directly connected to the housing 18.

As shown in FIG. 6, the operating power may be further supplied to the cooling means 11 through the power stabilizing means 42 (claim 5). In this case, the number of power supply terminals can be further reduced. Of course, the present embodiment may be applied to a configuration in which the antenna feeder 2 is removed as shown in FIG. FIG. 7 shows claim 6
1 shows an embodiment of a reliable wireless receiver according to the invention according to the present invention. This embodiment differs from the embodiment of FIG. 1 in that a temperature detecting means 51 for measuring the temperature inside the heat shield box 10 is provided inside the heat shield box 10.

The control means 28 includes a first level detecting means 26
While monitoring not only the detection level from the second level detection means 27 but also the temperature inside the heat shield box 10 detected by the temperature detection means 51, the signal from the temperature detection means is set to a predetermined threshold value. Higher than the first
Both the SW and the second SW 6 are switched from the solid line to the position indicated by the dotted line, and a third warning signal indicating that a cooling failure has occurred is transmitted through the terminal 30.

With the above configuration, the temperature information in the heat shielding box 10 is obtained, and even when the temperature information exceeds a predetermined value, the system is switched to the spare receiving system, thereby avoiding a state in which reception is impossible. In addition to this, an alarm signal indicating the occurrence of a failure can be transmitted. Although FIG. 7 is based on the configuration example of FIG. 1, similar effects can be obtained by using the configuration examples shown in FIG. 2 to FIG.

FIG. 8 shows an embodiment of a reliable radio receiver according to the present invention. In this embodiment, as compared with the embodiment of FIG. 7, FIG. 8 (A) directly detects the temperature of the first RXF4, FIG. 8 (B) detects the temperature of the first RA5, and FIG. Is different. With such a configuration, a temperature failure occurring in the first RXF4, the first RA5, or the cooling member 11a to be cooled can be more accurately detected.

As shown in FIG. 9, third signal switching means (SW) 61 switched by the control means 28 is provided.
The level of the pilot signal may be detected by the common level detecting means 26 '(claim 8). In this case, the level detecting means can be further reduced. Although FIG. 9 is based on the embodiment of FIG. 1, similar effects can be obtained in the configuration examples shown in FIGS.

Although not shown, when forming the first RXF 4, a material containing a high-temperature superconductor as a component can be used as the superconducting material. Examples of the high-temperature superconductor include a superconductor containing copper oxide as a component. In some high-temperature superconductors, the critical temperature at which the superconducting state is achieved exceeds 100 K. In such a superconductor, for example, the superconducting state can be obtained only by cooling the liquid nitrogen to a boiling point of about 77.4 K. In addition, the cooling capacity of the cooling means 11 can be reduced, and a smaller and less expensive cryogenic refrigerator can be used. As a result, the high-reliability wireless receiver can be made small and inexpensive.

[0036]

As described above, according to the present invention, by constantly inputting a pilot signal to the first RA5 and monitoring its output level, it is possible to detect a failure in the first RA5 and switch to the standby system. Further, the temperature detecting means 15 is provided in the heat shielding box, and the temperature of the cooling means 11 is detected by monitoring the temperature.
You can switch to the standby system.

The pilot signal is transferred to the second RA1 of the standby system.
5 and constantly monitoring its output level to detect whether it is normal or not, it is possible to perform highly reliable maintenance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of the invention of claim 2;

FIG. 3 is a block diagram showing an embodiment of the invention of claim 3;

FIG. 4 is a block diagram showing an embodiment of the invention according to claim 10;

FIG. 5 is a block diagram showing an embodiment of the invention of claim 4;

FIG. 6 is a block diagram showing an embodiment of the invention of claim 5;

FIG. 7 is a block diagram showing an embodiment of the invention of claim 6;

FIG. 8 is a block diagram showing an embodiment of the invention of claim 7;

FIG. 9 is a block diagram showing an embodiment of the invention of claim 8;

FIG. 10 is a block diagram showing a conventional high-sensitivity wireless receiver.

[Explanation of symbols]

 Reference Signs List 1 antenna 1a antenna coupling member 2 antenna feeder 3 first signal switching means (SW) 4 first reception bandpass filter (RXF) 5 first reception low noise amplifier (RA) 6 second signal switching means (SW) 7 output terminal 8 , 9 Terminator 10 Heat shielding box 11 Cooling means 12 First power supply terminal 12 'Common power supply terminal 13 Second power supply terminal 14 Second reception bandpass filter (RXF) 15 Second reception low noise amplifier (RA) 16 Third power supply Terminal 17 Control terminal 18 Housing 21 Pilot signal generation means 22 First pilot signal injection means 23 Second pilot signal injection means 24 First distribution means 25 Second distribution means 26 First level detection means 26 'Common level detection means 27 Second level detecting means 28 Control means 29 Manual switching means 30 (Alarm) terminal 31 Power distribution means 41 Power separation unit Filter 42 the power stabilizing unit 51 temperature detecting means

Claims (10)

[Claims] 1. An antenna, an antenna feeder, a first signal switching unit to which a signal from the antenna feeder is input and switched by a control signal, and a first reception band connected to one of the first signal switching units. A filter, a first reception low-noise amplifier connected to the first reception band-pass filter, a second signal switching means provided on an output side of the first reception low-noise amplifier, and switched by a control signal, An output terminal for outputting an output signal from the signal switching means, a second reception bandpass filter connected to the other connection terminal of the first signal switching means, and a second reception bandpass filter connected to the second reception bandpass filter; A second reception low-noise amplifier connected to the other connection terminal of the signal switching means, wherein the first reception band-pass filter and the first reception low-noise amplifier are enclosed in a heat shielding box The high-reliability radio receiver wherein the operating power is supplied to the first receiving low-noise amplifier, the cooling means, and the second receiving low-noise amplifier through the first, second, and third power supply terminals, respectively, and cooled by the cooling means. A pilot signal generating means for generating a pilot signal having a frequency within an attenuation band of the first and second reception band filters; and a pilot signal generation means inserted into a path between the first reception band filter and the first reception low noise amplifier. A first pilot signal injection means, a second pilot signal injection means inserted in a path between the second reception bandpass filter and the second reception low noise amplifier, and an output side of the first reception low noise amplifier. First distributing means inserted between the second signal switching means and outside the heat shielding box, an output side of the second receiving low noise amplifier, and the second signal switching means; A second distribution means inserted between the first distribution means, a first level detection means for detecting a level of the pilot signal from a signal distributed by the first distribution means, and a first level detection means for detecting a level of the pilot signal from the signal distributed by the second distribution means. Second level detecting means for detecting the level of the pilot signal; and comparing the level of the pilot signal detected by the first level detecting means with a preset threshold value. If the threshold value is lower than the threshold value, the first and second signal switching means are switched and a first alarm signal is transmitted, and the level of the pilot signal detected by the second level detection means and the threshold value are output. Control means for transmitting a second alarm signal when the level of the pilot signal is lower than the threshold value; And a manual switching means for manually switching between the first and second signal switching means. The first reception bandpass filter is made of a superconducting material, and is brought into a superconducting state by the cooling means. Reliable wireless receiver. 2. A power supply according to claim 1, wherein a common power supply terminal is provided in place of said first and third power supply terminals, and power supplied from said common power supply terminal is supplied to said first and second reception terminals by power distribution means. A highly reliable wireless receiver for supplying to a low noise amplifier. 3. The high-reliability wireless receiver according to claim 2, wherein the second power supply terminal is deleted, and operating power is also supplied from the power distribution unit to the cooling unit. 4. The operating power supply according to claim 1, wherein the first and third power supply terminals are deleted, and inserted between the second signal switching means and the output terminal, and supplied through the output terminal. And a power stabilizing means for stabilizing the power separated by the power separating filter and supplying the separated power to the first and second receiving low-noise amplifiers. Highly reliable wireless receiver. 5. The high-reliability wireless receiver according to claim 4, wherein said second power supply terminal is deleted, and operating power is also supplied from said power stabilizing means to said cooling means. 6. The temperature control device according to claim 1, further comprising a temperature detection unit configured to detect a temperature in the heat shielding box, wherein the control unit uses the temperature detection unit to detect temperature information in the heat shielding box. A high-reliability wireless receiver characterized in that when the temperature information is equal to or higher than a predetermined temperature, the first and second signal switching means are switched and a third alarm signal is transmitted. 7. The temperature detecting means according to claim 6, wherein the temperature detecting means detects a temperature of the first receiving bandpass filter, the first receiving low noise amplifier or the cooling member of the cooling means in the heat shielding box. Highly reliable wireless receiver. 8. The high-reliability wireless receiver according to claim 1, further comprising: a common level detecting unit in place of said first and second level detecting units;
And a third signal switching means for switching a signal from the second distribution means and supplying the signal to the common level detection means. 9. The high-reliability wireless receiver according to claim 1, wherein said superconducting material comprises a high-temperature superconductor. 10. The reliable wireless receiver according to claim 1, wherein said antenna feeder is omitted.
A highly reliable wireless receiver, wherein the antenna is directly connected to a device housing.