JP2001144635A - Wireless receiver - Google Patents
Wireless receiverInfo
- Publication number
- JP2001144635A JP2001144635A JP32371299A JP32371299A JP2001144635A JP 2001144635 A JP2001144635 A JP 2001144635A JP 32371299 A JP32371299 A JP 32371299A JP 32371299 A JP32371299 A JP 32371299A JP 2001144635 A JP2001144635 A JP 2001144635A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- temperature
- receiving circuit
- refrigerator
- wireless receiver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無線受信機に関
し、特に移動体通信や衛星通信等の基地局無線装置に適
用され、冷凍機で冷却された高周波受信回路を用いて、
所望の周波数帯域の信号を受信出力する無線受信機に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiver, and more particularly to a radio receiver which is applied to a base station radio apparatus such as mobile communication and satellite communication and uses a high frequency receiving circuit cooled by a refrigerator.
The present invention relates to a wireless receiver that receives and outputs a signal in a desired frequency band.
【０００２】[0002]
【従来の技術】近年の移動体通信の急速な普及に伴い、
周波数資源の有効利用等の観点から、基地局無線装置の
受信部を高感度化することが必要とされている。従来、
このような要請に応えるため、基地局受信部を冷凍機に
より冷却する高感度無線受信機が提案されている（例え
ば、特開平１０−１２６２９０号公報など参照）。この
無線受信機は、図３に示すように、アンテナ端子５１か
ら入力された受信信号から所望の帯域の信号を選択する
受信帯域通過濾波器５３Ａと、受信帯域通過濾波器５３
Ａの出力を所望のレベルまで低雑音で増幅する受信低雑
音増幅器５３Ｂと、受信低雑音増幅器５３Ｂで増幅され
た受信信号を出力するための受信信号出力端子５４とを
備えている。2. Description of the Related Art With the rapid spread of mobile communication in recent years,
From the viewpoint of effective use of frequency resources and the like, it is necessary to increase the sensitivity of the receiving unit of the base station wireless device. Conventionally,
In order to meet such a demand, a high-sensitivity wireless receiver that cools a base station receiving unit with a refrigerator has been proposed (for example, see Japanese Patent Application Laid-Open No. H10-126290). As shown in FIG. 3, the radio receiver includes a reception band-pass filter 53A for selecting a signal in a desired band from a reception signal input from an antenna terminal 51, and a reception band-pass filter 53A.
A reception low-noise amplifier 53B for amplifying the output of A to a desired level with low noise, and a reception signal output terminal 54 for outputting the reception signal amplified by the reception low-noise amplifier 53B are provided.
【０００３】また、受信帯域通過濾波器５３Ａおよび受
信低雑音増幅器５３Ｂを含む受信回路５２は、真空容器
５５中に真空封入され、外部と真空断熱されるととも
に、冷却ステージ５６上に熱接触を保って設置される。
さらに受信低雑音増幅器５３Ｂに動作電力を供給するた
めの第１電源端子５８と冷凍機５７に動作電力を供給す
るための第２電源端子５９がそれぞれ設けられる。真空
容器５５および冷凍機５７は筐体６０に設置される。真
空容器５５は内部を真空状態に保持し、真空断熱するこ
とにより、外部からの熱侵入を遮断する構造となってい
る。このため冷却ステージ５６に設置された受信帯域通
過濾波器５３Ａおよび受信低雑音増幅器５３Ｂは、冷凍
機５７により１５０Ｋ以下の極低温に冷却することがで
きる。冷凍機５７にはパルス管冷凍機などを利用するこ
とによって長期の連続運転が可能となる。A receiving circuit 52 including a receiving band-pass filter 53A and a receiving low-noise amplifier 53B is vacuum-sealed in a vacuum vessel 55, is vacuum-insulated from the outside, and maintains thermal contact on a cooling stage 56. Installed.
Further, a first power supply terminal 58 for supplying operating power to the reception low noise amplifier 53B and a second power supply terminal 59 for supplying operating power to the refrigerator 57 are provided. The vacuum container 55 and the refrigerator 57 are installed in the housing 60. The vacuum vessel 55 has a structure in which the inside is kept in a vacuum state and is insulated in a vacuum to block heat intrusion from the outside. Therefore, the reception band-pass filter 53A and the reception low-noise amplifier 53B installed on the cooling stage 56 can be cooled to an extremely low temperature of 150K or less by the refrigerator 57. By using a pulse tube refrigerator or the like for the refrigerator 57, a long-term continuous operation is possible.
【０００４】このように、受信回路５２を極低温に冷却
することにより、受信回路５２で発生する熱雑音を低減
することができる。その結果、図１に示した無線受信機
の雑音指数が大幅に改善され、受信感度が大幅に改善さ
れる。したがって、図１の無線受信機を用いることによ
り、低いレベルの受信信号に対しても、例えば規定され
たＣ／Ｎ（搬送波電力／雑音電力）の受信出力を得るこ
とができ、規定されたＣ／Ｎの受信出力を得るのに必要
な送信側の送信電力が小さくて済む等の効果を得ること
ができる。この無線受信機は、受信信号がアンテナ端子
１に入力されるまでの損失を低減するために屋外やアン
テナ鉄塔の塔頂部近傍に設置されることが多い。As described above, by cooling the receiving circuit 52 to an extremely low temperature, thermal noise generated in the receiving circuit 52 can be reduced. As a result, the noise figure of the wireless receiver shown in FIG. 1 is greatly improved, and the receiving sensitivity is greatly improved. Therefore, by using the wireless receiver of FIG. 1, for example, a reception output of a specified C / N (carrier power / noise power) can be obtained even for a received signal of a low level, and a specified C / N can be obtained. For example, it is possible to obtain an effect such that the transmission power on the transmission side necessary for obtaining the reception output of / N is small. This wireless receiver is often installed outdoors or near the top of an antenna tower in order to reduce the loss until a received signal is input to the antenna terminal 1.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、こよう
な無線受信機では、受動素子である受信帯域通過濾波器
５３Ａからはほとんど熱を発生しないものの、受信低雑
音増幅器５３Ｂが熱を発生する。また、室温である真空
容器５５と極低温に保持されている受信回路５２へ、外
部から接続される同軸ケーブルを通して熱伝導による熱
流入が存在する。したがって、冷却ステージ５６を極低
温に保持するためには、冷凍機５７はこれらによる熱を
奪うだけの冷凍能力を最低限備えていることが必要とさ
れる。However, in such a radio receiver, although little heat is generated from the receiving band-pass filter 53A which is a passive element, the receiving low-noise amplifier 53B generates heat. Further, heat flows into the vacuum chamber 55 at room temperature and the receiving circuit 52 maintained at an extremely low temperature by heat conduction through a coaxial cable connected from the outside. Therefore, in order to keep the cooling stage 56 at an extremely low temperature, the refrigerator 57 needs to have at least a refrigerating capacity capable of removing heat from the refrigerator.
【０００６】このような無線受信機の熱雑音を下げ、性
能を向上させるための方法として、冷却ステージ５６の
温度を低くする方法が考えられるが、同一の冷凍能力で
冷却ステージ５６の温度を低くしようとすると、冷却効
率が低下し、冷凍機５７の負担は大きくなる。また、冷
凍機５７の冷凍能力を大きくする方法も考えられるが、
冷凍能力を大きくすると冷凍機５７のサイズや重量が非
常に大きくなってしまうという問題がある。特に、移動
通信の無線基地局として、無線受信機を屋外、例えばア
ンテナ鉄塔の塔頂部に設置するためには、施行上、また
鉄塔の強度的負担を軽減するためにも無線受信機を小型
軽量化することが必要とされている。As a method for reducing the thermal noise of such a radio receiver and improving the performance, a method of lowering the temperature of the cooling stage 56 is conceivable. However, the temperature of the cooling stage 56 is lowered with the same refrigeration capacity. If this is attempted, the cooling efficiency will decrease, and the load on the refrigerator 57 will increase. A method of increasing the refrigerating capacity of the refrigerator 57 is also conceivable.
When the refrigerating capacity is increased, there is a problem that the size and weight of the refrigerator 57 become very large. Particularly, as a wireless base station for mobile communication, in order to install a wireless receiver outdoors, for example, at the top of an antenna tower, the size and weight of the wireless receiver must be reduced for implementation and to reduce the strength of the tower. Needs to be developed.
【０００７】一方、近年、盛んに開発の行われているペ
ルチエ素子等の電子冷却素子は、冷却効率は２０％以上
のものも存在し、得られる冷却効果が極めて高い。さら
に、電子冷却素子は固体素子であり、信頼性が高く、寿
命が長く、小型軽量である。しかしながら、このような
電子冷却素子の冷却温度範囲は比較的狭く、無線受信機
に必要とされる冷却温度範囲、すなわち室温から１５０
Ｋ以下の極低温まで冷却することはできない。本発明は
このような課題を解決するためのものであり、冷凍機の
冷凍能力を増加させることなく、受信回路からの発生熱
を奪い、かつ動作温度を低くすることの可能な、小型軽
量の無線受信機を提供することを目的としている。On the other hand, some electronic cooling elements such as Peltier elements, which have been actively developed in recent years, have a cooling efficiency of 20% or more, and the obtained cooling effect is extremely high. Further, the thermoelectric cooler is a solid state device, has high reliability, has a long life, is small and lightweight. However, the cooling temperature range of such an electronic cooling device is relatively narrow, and the cooling temperature range required for the radio receiver, that is, from room temperature to 150
It cannot be cooled to extremely low temperatures below K. The present invention has been made to solve such a problem, and without increasing the refrigerating capacity of a refrigerator, can remove heat generated from a receiving circuit and reduce the operating temperature, and can reduce the operating temperature. It is intended to provide a radio receiver.
【０００８】[0008]
【課題を解決するための手段】このような目的を達成す
るために、本発明による無線受信機は、真空容器中に封
入された冷却ステージと受信回路との間に電子冷却素子
を設けて、受信回路を冷却ステージの温度からさらに冷
却するようにしたものである。この電子冷却素子は、少
なくとも、受信回路のうち受信信号を所望の周波数帯域
で濾波する受信帯域濾波器と冷却ステージとの間に設け
るようにしてもよい。また、電子冷却素子への入力電圧
を変化させることにより、冷却機の運転状態を一定に保
ったまま受信回路の冷却温度を調節するようにしてもよ
い。受信帯域濾波器の導電部は、冷却ステージおよび電
子冷却素子で冷却される冷却温度で超伝導状態となる超
伝導材料から構成してもよい。この超伝導材料として、
高温超伝導体を用いてもよく、具体的にはＢｉ系、Ｔｌ
系、Ｈｇ系、Ｙ系あるいはＡｇ系の銅酸化物超伝導体を
用いてもよい。In order to achieve the above object, a radio receiver according to the present invention is provided with an electronic cooling element between a cooling stage sealed in a vacuum vessel and a receiving circuit, The receiving circuit is further cooled from the temperature of the cooling stage. The electronic cooling element may be provided at least between a cooling band and a receiving bandpass filter for filtering a received signal in a desired frequency band in the receiving circuit. Further, by changing the input voltage to the electronic cooling element, the cooling temperature of the receiving circuit may be adjusted while keeping the operating state of the cooler constant. The conductive portion of the reception bandpass filter may be made of a superconducting material that is in a superconducting state at a cooling temperature cooled by the cooling stage and the electronic cooling element. As this superconducting material,
High-temperature superconductors may be used, specifically, Bi-based, Tl
, Hg-based, Y-based or Ag-based copper oxide superconductor may be used.
【０００９】[0009]
【発明の実施の形態】次に、本発明について図面を参照
して説明する。図１は本発明の一実施の形態である無線
受信機のブロック図である。本無線受信機は、アンテナ
端子１から入力された受信信号から所望の帯域の信号を
選択する受信帯域通過濾波器３Ａと、受信帯域通過濾波
器３Ａの出力を所望のレベルまで低雑音で増幅する受信
低雑音増幅器３Ｂと、受信低雑音増幅器３Ｂで増幅され
た受信信号を出力するための受信信号出力端子４とを備
えている。これら受信帯域通過濾波器３Ａおよび受信低
雑音増幅器３Ｂを含む受信回路２は、真空容器５中に真
空封入され、外部と真空断熱される。Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a wireless receiver according to an embodiment of the present invention. This radio receiver selects a signal of a desired band from a received signal input from the antenna terminal 1, and amplifies the output of the received band-pass filter 3A to a desired level with low noise. The reception low noise amplifier 3B includes a reception signal output terminal 4 for outputting the reception signal amplified by the reception low noise amplifier 3B. The receiving circuit 2 including the receiving band-pass filter 3A and the receiving low-noise amplifier 3B is vacuum-sealed in a vacuum container 5 and is vacuum-insulated from the outside.
【００１０】受信帯域通過濾波器３Ａおよび受信低雑音
増幅器３Ｂは、電子冷却素子１１を介して冷却ステージ
６上に設置される。さらに受信低雑音増幅器３Ｂに動作
電力を供給するための第１電源端子８と冷凍機７に動作
電力を供給するための第２電源端子９と、電子冷却素子
１１への入力電圧を制御することにより温度を制御する
温度調節器１３に動作電力を供給するための第３電源端
子１２がそれぞれ設けられる。真空容器５および冷凍機
７は筐体１０に設置される。The receiving band-pass filter 3A and the receiving low-noise amplifier 3B are installed on the cooling stage 6 via the electronic cooling element 11. Further, controlling a first power supply terminal 8 for supplying operating power to the reception low noise amplifier 3B, a second power supply terminal 9 for supplying operating power to the refrigerator 7, and an input voltage to the electronic cooling element 11. A third power supply terminal 12 for supplying operating power to a temperature controller 13 that controls the temperature according to is provided. The vacuum container 5 and the refrigerator 7 are installed in the housing 10.
【００１１】真空容器５は内部を真空状態に保持し、真
空断熱することにより、外部からの熱侵入を遮断する構
造となっている。このため冷却ステージ６に設置された
受信帯域通過濾波器３Ａおよび受信低雑音増幅器３Ｂ
は、冷凍機７と電子冷却素子１１により１５０Ｋ以下の
極低温に冷却することができる。特に、受信帯域通過濾
波器３Ａに超伝導材料を用いる場合にはその超伝導転移
温度よりも低い温度に冷却する。冷凍機７にはパルス管
冷凍機などを利用することによって長期の連続運転が可
能となる。また、電子冷却素子としてはペルチエ素子な
どを用いることができる。The vacuum vessel 5 has a structure in which the inside is kept in a vacuum state and the heat intrusion from the outside is blocked by vacuum insulation. Therefore, the reception band-pass filter 3A and the reception low-noise amplifier 3B installed in the cooling stage 6
Can be cooled to an extremely low temperature of 150 K or less by the refrigerator 7 and the electronic cooling element 11. In particular, when a superconducting material is used for the receiving bandpass filter 3A, it is cooled to a temperature lower than its superconducting transition temperature. By using a pulse tube refrigerator or the like for the refrigerator 7, long-term continuous operation becomes possible. Further, a Peltier element or the like can be used as the electronic cooling element.
【００１２】次に、図２を参照して、本発明の動作につ
いて説明する。図２は冷凍機および電子冷却素子の冷却
能力と温度の関係を示す説明図である。本実施の形態で
は、受信帯域通過濾波器３Ａおよび受信低雑音増幅器３
Ｂは電子冷却素子１１を介して冷却ステージ６上に設置
し、冷却手段として冷凍機７と電子冷却素子１１を用い
ている。この場合、冷凍機７の冷却能力と温度の関係は
図２の線分２１によって示される。すなわち、冷却ステ
ージ６の温度がＴ1の場合には冷却能力Ｑ1となり、温度
Ｔ2の場合には冷却能力Ｑ2となる。したがって、例えば
低雑音増幅器３Ｂの発生熱と外部から同軸ケーブル等を
伝わって侵入する熱量の和がＱ2であった場合、冷凍機
７のみを用いた冷却では、冷却ステージ６の温度はＴ2
となる。Next, the operation of the present invention will be described with reference to FIG. FIG. 2 is an explanatory diagram showing the relationship between the cooling capacity of the refrigerator and the electronic cooling element and the temperature. In the present embodiment, the reception bandpass filter 3A and the reception low noise amplifier 3A
B is installed on the cooling stage 6 via the electronic cooling element 11, and uses the refrigerator 7 and the electronic cooling element 11 as cooling means. In this case, the relationship between the cooling capacity of the refrigerator 7 and the temperature is indicated by a line segment 21 in FIG. That is, when the temperature of the cooling stage 6 of the T 1 is the cooling capacity Q 1 becomes, in the case of temperature T 2 is the cooling capacity Q 2. Thus, for example, if the sum of the amount of heat entering from heat generated and an external low-noise amplifier 3B and transmitted to the coaxial cable or the like was Q 2, the cooling using only the refrigerator 7, the temperature of the cooling stage 6 T 2
Becomes
【００１３】次に、電子冷却素子１１も活用した場合に
ついて説明する。例えば、ある入力電圧を温度調節器１
３から電子冷却素子１１に印可した場合、前述の熱量Ｑ
2に加えて電子冷却素子１１からも熱が発生する。これ
らの和がＱ3であったとすると、線分２１から冷却ステ
ージ６の温度はＴ3となる。ここで、電子冷却素子１１
の冷却効率は温度範囲が狭い場合には冷凍機７より良い
ため、電子冷却素子１１の冷却能力と温度の関係は、Ｑ
3とＴ3の平衡点Ｐから線分２１の傾きより小さい線分２
２で表される。したがって、残りのＱ3−Ｑ2分の熱量を
電子冷却素子１１が受け持つとすると、電子冷却素子１
１上の受信回路２が設置された面の温度は熱量Ｑ2に対
してＴ4となり、結果として、冷凍機７のみを用いた場
合の温度Ｔ 2より低い温度Ｔ4で受信回路２を冷却するこ
とができる。Next, when the electronic cooling element 11 is also used,
explain about. For example, when a certain input voltage is applied to the temperature controller 1
3 to the thermoelectric cooling element 11, the above-mentioned heat quantity Q
TwoIn addition, heat is also generated from the electronic cooling element 11. this
The sum of them is QThreeFrom the line 21
The temperature of page 6 is TThreeBecomes Here, the electronic cooling element 11
Cooling efficiency is better than refrigerator 7 when temperature range is narrow
Therefore, the relationship between the cooling capacity of the electronic cooling element 11 and the temperature is Q
ThreeAnd TThreeSegment 2 smaller than the slope of segment 21 from the equilibrium point P of
It is represented by 2. Therefore, the remaining QThree−QTwoHeat of minutes
If the electronic cooling element 11 is responsible, the electronic cooling element 1
The temperature of the surface on which the receiving circuit 2 is installed is the heat quantity QTwoTo
Then TFourAs a result, when only the refrigerator 7 is used,
Combined temperature T TwoLower temperature TFourTo cool the receiving circuit 2
Can be.
【００１４】また、温度調節器１３を用いて電子冷却素
子１１に印可する電圧を調節することにより、冷却能力
Ｑ2を維持したままＴ5あるいはＴ6のような温度を実現
できる。これにより、稼動部品からなる冷凍機７の運転
状態を変えることなく、一定のコンディションで運転で
きるため、冷凍機７の寿命を延ばすことができる。さら
に、温度調整が電子冷却素子１１に印可する電圧で設定
できるため、極めて高速で高精度な温度調整が可能とな
る。Further, by adjusting the voltage applied to the electronic cooling element 11 with a temperature controller 13, can be realized temperatures such as left T 5 or T 6 was maintained a cooling capacity Q 2. Thus, the refrigerator 7 can be operated in a constant condition without changing the operation state of the refrigerator 7 composed of the moving parts, so that the life of the refrigerator 7 can be extended. Further, since the temperature adjustment can be set by the voltage applied to the electronic cooling element 11, extremely high-speed and high-precision temperature adjustment is possible.
【００１５】図１では、受信回路２全体を電子冷却素子
１１で冷却する例について説明したが、受信帯域濾波器
３Ａと冷却ステージ６との間にのみ電子冷却素子１１を
設け、受信回路２の他の部分は冷却ステージ６で冷却す
るようにしてもよい。これにより、電子冷却素子１１か
らの発熱がほとんどないため、電子冷却素子１１の負担
熱量が低減されて受信帯域濾波器３Ａを効率よく冷却で
き、受信帯域濾波器３Ａでの損失を極めて小さくでき
る。特に、後述のように受信帯域濾波器３Ａの導電部を
超伝導材料で構成した場合は、極めて有効である。な
お、受信帯域濾波器３Ａだけでなく受信低雑音増幅器３
Ｂと冷却ステージ６との間に別個の電子冷却素子を設け
てもよく、これにより受信低雑音増幅器３Ｂから受信帯
域濾波器３Ａへの熱伝導をある程度抑制でき、受信低雑
音増幅器３Ｂでの発熱に起因する受信機の雑音指数を大
幅に低減できる。In FIG. 1, an example in which the entire receiving circuit 2 is cooled by the electronic cooling element 11 has been described. However, the electronic cooling element 11 is provided only between the receiving bandpass filter 3A and the cooling stage 6, and the receiving circuit 2 is cooled. Other parts may be cooled by the cooling stage 6. Thereby, since there is almost no heat generation from the electronic cooling element 11, the heat load on the electronic cooling element 11 is reduced, the receiving bandpass filter 3A can be efficiently cooled, and the loss in the receiving bandpass filter 3A can be extremely reduced. In particular, when the conductive portion of the reception bandpass filter 3A is made of a superconducting material as described later, it is extremely effective. Note that not only the reception bandpass filter 3A but also the reception low noise amplifier 3
A separate electronic cooling element may be provided between B and the cooling stage 6, whereby heat conduction from the reception low noise amplifier 3B to the reception bandpass filter 3A can be suppressed to some extent, and heat generation in the reception low noise amplifier 3B. Can greatly reduce the noise figure of the receiver.
【００１６】図１の受信帯域濾波器３Ａを、冷却した温
度で超伝導状態となる超伝導材料を用いて構成できる。
受信帯域濾波器３Ａは例えばマイクロストリップライン
で構成され、そのマイクロストリップラインを構成する
導電部すなわちグランド層と信号線とがともに超伝導材
料で構成される。受信帯域濾波器３Ａを超伝導材料を用
いて構成することにより、受信帯域濾波器３Ａの損失を
著しく小さくし、受信機の雑音指数を大幅に低減でき
る。その結果、受信機の感度を大幅に改善することがで
きる。The receiving bandpass filter 3A shown in FIG. 1 can be constituted by using a superconducting material which becomes a superconducting state at a cooled temperature.
The reception bandpass filter 3A is composed of, for example, a microstrip line, and the conductive portion constituting the microstrip line, that is, the ground layer and the signal line are both composed of a superconductive material. By configuring the reception bandpass filter 3A using a superconducting material, the loss of the reception bandpass filter 3A can be significantly reduced, and the noise figure of the receiver can be greatly reduced. As a result, the sensitivity of the receiver can be significantly improved.
【００１７】受信帯域濾波器３Ａを構成する超伝導材料
として、高温超伝導体を用いてもよい。高温超伝導体と
しては、例えばＢｉ系、Ｔｌ系、Ｈｇ系、Ｙ系、Ａｇ系
等の銅酸化物超伝導体があり、これらはいずれも使用可
能である。高温超伝導体の中には超伝導状態に転移する
温度が１００Ｋを超える物質も存在する。このような超
伝導体では、例えば１気圧下での液体窒素の沸点７７．
４Ｋ程度に冷却するだけで超伝導状態が得られるため、
さらに冷却能力を緩和でき、より小型で、かつ、安価な
極低温冷凍機が使用可能となる。その結果、無線受信機
を小型かつ安価に構成することができる。A high-temperature superconductor may be used as the superconducting material constituting the reception bandpass filter 3A. Examples of the high-temperature superconductor include copper oxide superconductors such as Bi-based, Tl-based, Hg-based, Y-based, and Ag-based superconductors, and any of them can be used. Some high-temperature superconductors have a temperature at which the transition to the superconducting state exceeds 100K. In such a superconductor, for example, the boiling point of liquid nitrogen at 1 atm.
Superconducting state can be obtained only by cooling to about 4K,
Further, the cooling capacity can be reduced, and a smaller and less expensive cryogenic refrigerator can be used. As a result, the wireless receiver can be made small and inexpensive.
【００１８】[0018]
【発明の効果】以上説明したように、本願発明によれ
ば、受信帯域通過濾波器を含む受信回路を真空容器中に
封入して冷凍機で冷却する場合、冷凍機の冷却ステージ
と少なくとも受信帯域通過濾波器の間に電子冷却素子を
挿入することにより、冷凍機の冷却能力を増加させるこ
となく、発生熱を奪い、かつ動作温度を低くすることの
可能となる。したがって、冷凍機の冷却能力を増加させ
ることなく、発生熱を奪い、かつ動作温度を低くするこ
との可能な、小型軽量の無線受信機を提供することが可
能となる。As described above, according to the present invention, when a receiving circuit including a receiving band-pass filter is enclosed in a vacuum vessel and cooled by a refrigerator, at least a receiving stage is connected to a cooling stage of the refrigerator. By inserting an electronic cooling element between the pass-through filters, it is possible to remove generated heat and lower the operating temperature without increasing the cooling capacity of the refrigerator. Therefore, it is possible to provide a small and lightweight wireless receiver capable of removing the generated heat and lowering the operating temperature without increasing the cooling capacity of the refrigerator.
【図１】 本発明の一実施の形態による無線受信機を示
すブロック図である。FIG. 1 is a block diagram illustrating a wireless receiver according to an embodiment of the present invention.
【図２】 冷凍機および電子冷却素子の冷却能力と温度
の関係を示す図である。FIG. 2 is a diagram showing a relationship between a cooling capacity of a refrigerator and an electronic cooling element and a temperature.
【図３】 従来の無線受信機を示すブロック図である。FIG. 3 is a block diagram showing a conventional wireless receiver.
１…アンテナ端子、２…受信回路、３Ａ…受信帯域通過
濾波器、３Ｂ…受信低雑音増幅器、４…受信信号出力端
子、５…真空容器、６…冷却ステージ、７…冷凍機、８
…第１電源端子、９…第２電源端子、１０…筐体、１１
…電子冷却素子、１２…第３電源端子、１３…温度調節
器。DESCRIPTION OF SYMBOLS 1 ... Antenna terminal, 2 ... Receiving circuit, 3A ... Reception band pass filter, 3B ... Reception low noise amplifier, 4 ... Reception signal output terminal, 5 ... Vacuum container, 6 ... Cooling stage, 7 ... Refrigerator, 8
... first power supply terminal, 9 ... second power supply terminal, 10 ... housing, 11
... Electronic cooling element, 12 ... Third power supply terminal, 13 ... Temperature controller.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5F036 AA01 BA32 BF01 5K016 AA00 AA06 AA08 CA08 DA00 EA00 5K052 AA02 BB02 DD18 EE05 GG01 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5F036 AA01 BA32 BF01 5K016 AA00 AA06 AA08 CA08 DA00 EA00 5K052 AA02 BB02 DD18 EE05 GG01
Claims (6)
する真空容器と、 この真空容器中に封入され、前記真空容器外部の冷却機
により冷却される冷却ステージと、 前記真空容器中に封入され、アンテナで受信された受信
信号を所望の周波数帯域で濾波して出力する受信回路
と、 前記真空容器中に封入されるとともに前記冷却ステージ
と前記受信回路との間に設けられ、前記受信回路を前記
冷却ステージの温度からさらに冷却する電子冷却素子と
を備えることを特徴とする無線受信機。1. A vacuum container for blocking heat from entering from outside by vacuum insulation, a cooling stage sealed in the vacuum container, and cooled by a cooler outside the vacuum container, and a cooling stage sealed in the vacuum container. A receiving circuit that filters a received signal received by the antenna in a desired frequency band and outputs the filtered signal, and is provided between the cooling stage and the receiving circuit while being enclosed in the vacuum vessel, and the receiving circuit An electronic cooling element for further cooling from a temperature of the cooling stage.
受信信号を所望の周波数帯域で濾波する受信帯域濾波器
と前記冷却ステージとの間に設けられていることを特徴
とする無線受信機。2. The wireless receiver according to claim 1, wherein the electronic cooling element is at least between a receiving bandpass filter for filtering a received signal in a desired frequency band in the receiving circuit and the cooling stage. A wireless receiver, which is provided.
いて、 前記電子冷却素子への入力電圧を変化させることによ
り、前記冷却機の運転状態を一定に保ったまま前記受信
回路の冷却温度を調節する温度調節器を備えることを特
徴とする無線受信機。3. The radio receiver according to claim 1, wherein a cooling temperature of the receiving circuit is reduced by changing an input voltage to the electronic cooling element while keeping an operation state of the cooling machine constant. A wireless receiver comprising a temperature controller for adjusting.
て、 前記受信帯域濾波器の導電部は、前記冷却ステージおよ
び前記電子冷却素子で冷却される冷却温度で超伝導状態
となる超伝導材料から構成されていることを特徴とする
無線受信機。4. The radio receiver according to claim 1, wherein the conductive portion of the reception bandpass filter is in a superconducting state at a cooling temperature cooled by the cooling stage and the electronic cooling element. A wireless receiver characterized by comprising:
徴とする無線受信機。5. The radio receiver according to claim 4, wherein a high-temperature superconductor is used as the superconducting material.
あるいはＡｇ系の銅酸化物超伝導体を用いることを特徴
とする無線受信機。6. The radio receiver according to claim 4, wherein a Bi-based, Tl-based, Hg-based, Y-based or Ag-based copper oxide superconductor is used as the superconducting material. Receiving machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32371299A JP2001144635A (en) | 1999-11-15 | 1999-11-15 | Wireless receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32371299A JP2001144635A (en) | 1999-11-15 | 1999-11-15 | Wireless receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001144635A true JP2001144635A (en) | 2001-05-25 |
Family
ID=18157769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32371299A Pending JP2001144635A (en) | 1999-11-15 | 1999-11-15 | Wireless receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001144635A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065653A1 (en) * | 2001-02-13 | 2002-08-22 | Nec Corporation | Radio receiver |
| WO2004088216A1 (en) | 2003-03-28 | 2004-10-14 | Fujitsu Limited | Cooler for low-temperature operating article |
-
1999
- 1999-11-15 JP JP32371299A patent/JP2001144635A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065653A1 (en) * | 2001-02-13 | 2002-08-22 | Nec Corporation | Radio receiver |
| US7206605B2 (en) | 2001-02-13 | 2007-04-17 | Nec Corporation | Radio receiver |
| WO2004088216A1 (en) | 2003-03-28 | 2004-10-14 | Fujitsu Limited | Cooler for low-temperature operating article |
| EP1610074A1 (en) * | 2003-03-28 | 2005-12-28 | Fujitsu Limited | Cooler for low-temperature operating article |
| CN1322285C (en) * | 2003-03-28 | 2007-06-20 | 富士通株式会社 | Cooler for low-temperature operating article |
| US7571616B2 (en) | 2003-03-28 | 2009-08-11 | Fujitsu Limited | Cooling apparatus for articles operated at low temperature |
| EP1610074A4 (en) * | 2003-03-28 | 2012-09-05 | Fujitsu Ltd | Cooler for low-temperature operating article |
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