JP2003092538A - Radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide radio equipment in which a substrate provided with a filter and an amplifier can be integrated in a case and efficiently cooled. SOLUTION: The radio equipment for transmitting/receiving signals is equipped with a substrate 110 provided with a filter 112 and an amplifier 114, a holding part 120 for respectively holding a plurality of substrates 110 on the upper face and the lower face and a case 100 for holding the holding part 120 on the inner face. A receiver can be equipped with the substrate 110 provided with the filter 112 and the amplifier 114 and the case 100 for holding the substrates 110 on a plurality of inner faces as well.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a receiver. In particular, the present invention relates to the provision of a compact and highly efficient wireless device by integrating and cooling a plurality of substrates including filters and amplifiers.

[0002]

2. Description of the Related Art A radio base station receiving system is provided with a plurality of receiving units including an antenna, a receiving filter, an amplifier and the like for each sector divided into regions and for each branch for diversity. Further, when performing frequency division multiplexing in wireless communication, it is necessary to selectively receive a predetermined frequency region because the limited frequency region is finely divided and multiplexed. As a method of efficiently and selectively receiving a predetermined frequency, there is a method of processing a received signal using a superconducting filter cooled to a predetermined temperature or a low noise amplifier (LNA). In particular, JP-A-2000-278012
Japanese Patent Laid-Open No. 2000-261343 discloses a method of cooling a superconducting filter and a low noise amplifier.

[0003]

However, the radio base station receiving system includes a large number of receiving units (including an antenna, a receiving filter, an amplifier, etc.), and cooling each of them requires a great deal of cost. In addition, Japanese Patent Laid-Open No.
According to the method disclosed in Japanese Patent Publication No. 000-26134,
According to the method disclosed in Japanese Unexamined Patent Application Publication No. 2000-26134, the superconducting filter and the LNA are stored in the respective cases, and only the reduction of the dielectric loss, the conductor loss and the radiation loss in the resonator pattern is performed. Since they are cooled in a stacked state, the portion to be cooled becomes large and the cooling cost becomes large.

Therefore, it is an object of the present invention to provide a wireless device which can solve the above problems. This object is achieved by a combination of features described in independent claims of the invention. The dependent claims define further advantageous specific examples of the present invention.

[0005]

That is, according to an embodiment of the present invention, a radio device for transmitting and receiving a predetermined signal has a substrate including a filter and an amplifier, and a plate-like shape. A holding portion that holds the lower surface and a case that holds the holding portion on the inner surface are provided.

According to another aspect of the present invention, a radio device for transmitting and receiving a predetermined signal includes a substrate including a filter and an amplifier, and a case for holding the substrate on a plurality of inner surfaces.

The plurality of inner surfaces may face each other. You may further provide the partition plate which divides the surface which hold | maintains a board | substrate into a several area | region, and may hold | maintain a board | substrate in each of the several area | region divided by the partition board. An upper surface and a lower surface of the case having the substrate may be substantially parallel to each other, and may further include a cooling plate for loading and cooling the plurality of cases.

A depressurized container having a substantially cylindrical shape or a substantially spherical shape and having a depressurized inside and a cooling plate and a case may be further provided. The filter may be composed of a superconducting material.

The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be inventions.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the claimed invention, and the features described in the embodiments Not all combinations are essential to the solution of the invention.

FIG. 1 shows a schematic of a receiver having a filter and an amplifier. The receiving device of this example is an example of a wireless device according to the present invention. Here, for example, the filter is a superconducting filter and the amplifier is a low noise amplifier (LNA). The receiving device includes an antenna unit 50 and a case 100.
A cooling plate 200, a cooler 300, and a decompression container 400.
And a vacuum pump 500 and a processing unit 600. The antenna unit 50 receives the radio signal and outputs it to a substrate (not shown) in the case 100.

The case 100 holds the substrate 110 therein and cools the substrate 110. That is, case 100
Cools the substrate 110 by moving the thermal energy received from the substrate 110 inside the housing to the cooling plate 200. Therefore, the case 100 includes the cooling plate 200.
It is desirable to make surface contact with. The substrate 110 in the case 100 performs a predetermined process (for example, a predetermined frequency component selection or signal amplification) on the received signal, and the processing unit 6
Output to 00. When the processing unit 600 receives a signal from the substrate 110 in the case 100, the processing unit 600 performs a predetermined process to realize wireless communication.

The cooler 300 cools the cooling plate 200 so that the case 10 is in contact with the cooling plate 200.
0 can be cooled. Further, the cooler 300 is a cryogenic cooler capable of stably maintaining an extremely low temperature such as several tens of K for a long time by utilizing a heat exchange cycle by compression and expansion of helium gas or the like.

The decompression container 400 has a vacuum pump 5 inside.
It is decompressed by 00. For example, the decompression container 400
Is depressurized to a state close to vacuum by the action of the vacuum pump 500. The decompression container 400 has a case 100 and a cooling plate 200 inside which is decompressed. By housing the case 100 and the cooling plate 200 in the decompression container 400, it is possible to reduce heat exchange between the case 100 and the cooling plate 200 and the outside, other than heat exchange using the cooling plate 200 and the cooling machine 300. can do.

FIG. 2 shows an example of the case 100. Figure 2
(A) shows a cross section of the case 100. In this example, the case 100 has a substantially rectangular parallelepiped shape, but may have a substantially cubic shape, a substantially polygonal prism shape, or a substantially cylindrical shape. The case 100 includes a side plate 102, an upper plate 104, a lower plate 106, and a substrate 11.
It has 0 and the holding part 120. The side surface plate 102 contacts the holding portion 120 on the inner surface and holds the holding portion 120 in the hollow space. The holding unit 120 has a plate shape and holds the plurality of substrates 110 on the upper surface and the lower surface, respectively. In this example, the holding unit 120 holds the substrates 110 on the upper surface and the lower surface one by one. The holding portion 120 is held in the space between the upper surface plate 104 and the lower surface plate 106 with the peripheral portion of the holding portion 120 contacting the inner surface of the side surface plate 102. The upper surface plate 104 and the lower surface plate 106 form a case having a hollow structure together with the side surface plate 102. The upper surface and the lower surface of the case 100, that is, the upper surface of the upper surface plate 104 and the lower surface of the lower surface plate 106 are preferably substantially parallel to each other. By doing so, the case 100 can be brought into surface contact with the cooling plate 200, and further, the case 100 can be laminated on each other. In addition, the side plate 102 and the top plate 1 of the case 100
04, the lower surface plate 106, and the holding portion 120 preferably include a material having good thermal conductivity. In particular, the side plate 10
2 and the holding portion 120 preferably include a material having good thermal conductivity. The side plate 102 of the case 100 and the holding part 120 are preferably in surface contact with each other, and may be integrally molded. That is, the side plate 102,
The upper surface plate 104, the lower surface plate 106, and a part of the holding plate 120 may be integrated. As in this example, the holding unit 120
By holding the substrates on the upper surface and the lower surface, respectively, it is possible to reduce the volume and surface area of the case per substrate as compared with the case of holding the substrate on the bottom surface of the box-shaped case.

FIG. 2B shows an example of the substrate 110.
The substrate 110 includes a filter 112 and an amplifier 114. For example, the substrate 110 may include a filter 112, an isolator (not shown), and an amplifier 114. The filter extracts a signal having a predetermined frequency. In particular, filter 112 is preferably a superconducting filter and amplifier 114 is preferably a low noise amplifier. In this case, the cooler 300 has the case 10
It is necessary to cool the superconducting filter 112 in 0 to a temperature at which it becomes a superconducting state. The low noise amplifier 114 amplifies the received signal. Further, the low noise amplifier 114 is
By cooling, noise generated during signal amplification can be reduced.

FIG. 3 shows another example of the case 100. FIG. 3A shows an example of a case 100 having a partition plate 130. In this example, the case 100 has a side plate 102, a top plate 104, and a bottom plate 106, as in the above-described example.
The substrate 110, the holding unit 120, and the partition plate 130. The partition plate 130 is the side plate 10.
2, upper plate 104, lower plate 106, and holding plate 120
May be integrated with a part of. The partition plate 130 partitions the surface holding the substrate 110 into a plurality of regions. That is,
In this example, the partition plate 130 partitions the upper surface and the lower surface of the holding unit 120 into a plurality of regions. The case 100 has a plurality of substrates 110 arranged in a plurality of areas partitioned by a partition plate 130.
Hold.

FIG. 3B shows an example of a case that holds the substrate 110 on a plurality of inner surfaces. The case 100 includes a side plate 102, an upper plate 104, a lower plate 106, and a substrate 11.
Has 0 and. The side plate 102, the top plate 104, and a part of the bottom plate 106 may be integrated. In this example,
The case 110 holds the substrate 110 on a plurality of inner surfaces. In particular, it is desirable that the case 110 holds the substrates 110 on inner surfaces facing each other. For example,
The case 100 includes an inner surface of an upper plate 104 and a lower plate 106.
The substrate 110 is held on the inner surface of the substrate 110. In this case, it is desirable that the upper surface plate 104 and the lower surface plate 106 include a material having good thermal conductivity. Similarly, the substrate 110 may be held on a plurality of inner surfaces of the side plate 102. Also in the case of this example, the partition plate 130 may be provided. That is, the partition plates 130 are provided on the inner surfaces of the upper plate 104 and the lower plate 106, and the substrates 1 are respectively placed in the areas partitioned by the partition plates 130.
10 may be retained. By holding the substrates on the upper surface plate 104 and the lower surface plate 106 of the case 100 as in this example, the volume and surface area of the case per substrate can be reduced as compared with the case of holding the substrates on the bottom surface of the box-shaped case. can do.

FIG. 4 shows an example of the decompression container 400. Figure 4
(A) is a perspective view of a substantially cylindrical decompression container 400.
The inside of the decompression container 400 is kept in a substantially vacuum state by a vacuum pump 500, and a case 100 (not shown) and a cooling plate 200 are provided.
(Not shown) is provided inside. The cooling plate 200 is the cooling device 3
The heat exchange between the case 100 and the outside at other portions is blocked by the substantially vacuum space inside the decompression container 400. FIG. 4B is a perspective view of the substantially spherical decompression container 400. Also in this case, as in the case of FIG.
The case 100 in the decompression container 400 is cooled. As shown in this figure, a substantially cylindrical and substantially spherical decompression container 400
Has better pressure resistance than other polyhedra.

FIG. 5 shows a cross section of an example of a vacuum vessel 400. FIG. 5A is a cross-sectional view of the substantially cylindrical decompression container 400. The decompression container 400 has a plurality of cases 10 inside.
0 and a cooling plate 200. The cooling plate 200 loads a plurality of cases 100 and cools them. In this example, case 1
00 are stacked so as to overlap each other. Since the cases 100 are in surface contact with each other, they can conduct heat sufficiently and have a substantially uniform temperature. FIG. 5B is a cross-sectional view of the substantially spherical decompression container 400. The decompression container 400 has a plurality of cases 100 and a cooling plate 200 inside. The cooling plate 200 loads a plurality of cases 100 and cools them. In this example, the case 100 is laminated according to the shape of the inner wall of the substantially spherical decompression container 400.
By mounting the case 100 on the cooling plate 200 as described above, the surface area of the cooling plate 200 per one case 100 having a substrate can be reduced. Therefore, the volume and surface area of the decompression container 400 can be reduced. That is, the heat capacity of the decompression container 400 can be reduced, and the cooling efficiency can be improved. Furthermore, the efficiency of decompressing the inside of the decompression container 400 increases.

As described above, according to the present embodiment, more substrates can be cooled by the predetermined depressurization container 400 and cooling plate 200. In other words, a predetermined number of substrates are loaded into the smaller cooling plate 200 and the vacuum vessel 40.
The cooling cost can be reduced to 0, and the cost for cooling and depressurizing can be reduced.

Although the present invention has been described with reference to the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

[0023]

As is apparent from the above description, according to the present invention, the substrate including the filter and the amplifier can be integrated in the case and efficiently cooled.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a receiver having a filter and an amplifier.

FIG. 2 is a diagram showing an example of a case 100.

FIG. 3 is a diagram showing another example of the case 100.

FIG. 4 is a diagram showing an example of a decompression container 400.

5 is a diagram showing a cross section of an example of a decompression container 400. FIG.

[Explanation of symbols]

100 cases 102 Side plate 104 Top plate 106 Bottom plate 110 substrate 112 filters 114 amplifier 120 holding part 130 partition boards 200 cooling plate 400 decompression container

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaki Sudo             3-14-20 Higashi-Nakano Stock Market, Nakano-ku, Tokyo             Inside Hitachi Kokusai Electric (72) Inventor Noriyuki Kagaya             3-14-20 Higashi-Nakano Stock Market, Nakano-ku, Tokyo             Inside Hitachi Kokusai Electric (72) Inventor Takashi Uchida             3-14-20 Higashi-Nakano Stock Market, Nakano-ku, Tokyo             Inside Hitachi Kokusai Electric F term (reference) 5K011 AA05 AA13 DA11 DA27 KA13                 5K016 CA01 CB01 CB15 DA00 DA06                       DA07 DA08 DA09

Claims (7)

[Claims] 1. A radio device for transmitting and receiving a predetermined signal, comprising: a substrate including a filter and an amplifier; a plate-shaped holding portion for holding the plurality of substrates on an upper surface and a lower surface, respectively; A wireless device, comprising: a case that holds the holding portion on its inner surface. 2. A wireless device for transmitting and receiving a predetermined signal, comprising: a substrate including a filter and an amplifier; and a case for holding the substrate on a plurality of inner surfaces. 3. The radio device according to claim 2, wherein the plurality of inner surfaces face each other. 4. The partition plate for partitioning the surface holding the substrate into a plurality of regions, and the substrate is held in each of the plurality of regions partitioned by the partition plate. The wireless device according to claim 2. 5. An upper surface and a lower surface of the case having the substrate are substantially parallel to each other, and further comprising a cooling plate for stacking and cooling a plurality of the cases. Radio described in. 6. The wireless device according to claim 5, further comprising a decompression container having a substantially cylindrical shape or a substantially spherical shape, the decompressed interior having the cooling plate and the case. 7. The radio device according to claim 1, wherein the filter is made of a superconducting material.