EP2368291A1 - Architecture de refroidissement notamment pour antenne a modules actifs - Google Patents
Architecture de refroidissement notamment pour antenne a modules actifsInfo
- Publication number
- EP2368291A1 EP2368291A1 EP09783990A EP09783990A EP2368291A1 EP 2368291 A1 EP2368291 A1 EP 2368291A1 EP 09783990 A EP09783990 A EP 09783990A EP 09783990 A EP09783990 A EP 09783990A EP 2368291 A1 EP2368291 A1 EP 2368291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- equipment
- row
- rows
- forced air
- air
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
Definitions
- the invention relates to the general field of cooling by air circulation of electronic equipment packaged in racks or cabinets. It relates in particular to antenna structures with active modules.
- each module comprises, in known manner, means for generating an electromagnetic wave having a given power.
- each module delivers a significant power which is accompanied by a release of thermal energy, the efficiency of a module not being naturally equal to one. Consequently, in order to prevent the modules from overheating, which is detrimental to their operation, it is necessary for the antenna structure to include means capable of recovering and evacuating the heat energy dissipated by each module so as to maintain the temperature thereof at a value that does not affect its operation.
- an active module antenna mainly comprises, as schematically illustrates in Figure 1, a radiating panel 11 on which are arranged radiating elements 12 connected to transmission / reception modules 13 comprising amplifiers of power.
- the reception transmission modules 13 are generally made in the form of electronic boxes mounted on electronic boards 14 arranged superimposed in parallel planes perpendicular to the plane of the radiating panel so as to form an assembly housed behind the radiating face of the antenna .
- Figure 1 schematically illustrates one of these plans.
- the electronic cards are generally housed in a reception structure which ensures in particular their retention in position vis-à-vis the radiating panel.
- This reception structure is for example made of racks adapted to receive the electronic cards.
- the reception structure thus, as shown diagrammatically in FIG. 2, as an overlay of racks 21 arranged in rows 22 superimposed each row comprising a plurality of racks juxtaposed parallel to the radiating panel, not shown in the figure.
- Each electronic card 14 groups together, as the case may be, one or more transmission / reception modules 13.
- the transmission / reception modules 13 which comprise generally heat dissipating components are located near the radiating panel 11.
- an active module antenna is shown schematically as a radiating plane behind which electronic boards (14) are arranged to form alignments perpendicular to the plane of the panel, the alignments being separated from each other by intervals forming corridors 23 of given width.
- the assembly formed by the electronic cards and the reception structure in which they are housed, is generally protected from the external environment by walls which form with the radiating panel an internal space which protects the electronic equipment from mechanical or climatic aggressions. exteriors.
- the active transmission / reception modules 13 being heat dissipating elements (of heat)
- an active module antenna must comprise means in particular capable of cooling the transmission / reception modules.
- a first mode of conditioning by air circulation is to use a ventilation system causing the circulation of a forced air stream in the host structure.
- This air flow materialized by the arrows 31 in the figure is directed parallel to the plans in which are arranged the electronic cards 14 in the racks 21 and perpendicular to the direction in which the racks 21 are superimposed.
- the forced air flow thus comes into contact simultaneously with the surface of all the heat dissipating modules, the contact giving rise to the transfer to the air stream of the thermal energy dissipated by the latter, this transfer resulting in by raising the temperature of the circulating air.
- the air stream thus heated is then normally discharged leaving the support structure by the face 32 opposite the face 33 through which it entered, these two faces having, as illustrated in the figure, openings allowing the circulation of the air.
- the air stream 31 flowing in a constant horizontal direction is distributed simultaneously on all the electronic cards 14, each card, regardless of its position, thus being brought into contact with a stream of air whose temperature uniform is able to allow the absorption of thermal energy dissipated by the modules 13 hosted by this card.
- This first mode of conditioning that can be described as parallel packaging mode, is simple implementation and generally effective.
- the face through which the air flow normally leaves the host structure is closed off by the radiating panel, so that, as shown in FIG. Forced air 41 is forced, in such a mode of circulation, to evacuate as best as possible by the other faces of the structure by traveling along the wall of the radiating panel 11. This path is even more difficult. that the host structure is usually, as this has been said previously, very close to the wall of the radiating panel.
- This difficulty of circulation results in a heating of the air in zones 42 located near the wall of the radiating panel, areas in which the transmission / reception modules 13 are located which represent the elements of the structure most strongly heat sink.
- a second mode of air circulation conditioning also consists in using a ventilation system causing the circulation of a forced air stream 43 in the host structure.
- the flow of air is in this case directed in a direction such that it progressively comes into contact with the various electronic boards 14. It thus gradually enters into contact with the surface of the heat dissipating modules 13, the contact giving transfer to the air flow of the thermal energy dissipated by the latter, this transfer resulting in a gradual rise in the temperature of the air flowing to the hovel as it approaches the zone 44 by which it leaves the host organization. Consequently, each electronic card 14 is in contact with an air flow whose temperature is a function of the position of the card in the reception structure.
- This second conditioning mode which can be described as a series conditioning mode, has the advantage of being compatible with a structure of the type of that of an active module antenna. Indeed the forced air flow is then carried out parallel to the plane of the radiating surface.
- an electronic card comes into contact with a flow of air that has already been in contact with a variable number of cards, the thermal energy absorption that occurs at the modules mounted on the map varies from one map to another.
- some cards mainly cards located nearby of the zone of the structure through which the air flow is introduced, are brought into contact with a flow of fresh air and are suitably ventilated and operate in a nominal manner.
- the electronic cards 45 located close to the zone through which the air flow exits the reception structure are brought into contact with a heated air flow which ensures less cooling of the cards.
- the cards concerned have their temperature increase until, in certain unfavorable cases, they reach a temperature incompatible with satisfactory operation of the modules 13 housed on these cards. Consequently, the creation of hot zones 44 inside the structure can lead to degraded overall operation.
- the only way to overcome this disadvantage is therefore to oversize the flow of air circulating oversize which is not without consequences in terms of power consumption and antenna mass, as well as in terms of noise. Consequently, such a type of packaging, known in the art, is also really usable only for relatively low power active module antennas.
- each card 46 must include internal pipes 47 as well as hydraulic connection means 48 for connecting to the set of pipes 49 of the host structure.
- the implementation of this pipe set therefore naturally has consequences to make the host structure and the electronic cards 46 more complex to achieve and therefore more expensive. It also has the unfortunate consequence of making the disassembly of the cards more difficult because in order to extract a card from its reception structure it is necessary to implement means making it possible to separate the ducts from the circuit of the cooling circuit of the structure, without causing leakage of fluid.
- thermal conditioning means proposed to ensure the packaging of a reception structure containing electronic cards, some of whose elements are highly dissipative of thermal energy, is really appropriate as regards relates to the thermal conditioning of active module antennas, in particular those of high power.
- An object of the invention is to propose a thermal conditioning structure that is really adapted to active module antennas, in particular to high power antennas that ensure proper cooling of the heat dissipating modules housed in these antennas, the emission modules / Reception in particular, taking into account the structure constraints specific to these antennas, structural constraints that render ineffective, at least partially, the known packaging modes described above.
- the subject of the invention is a device for thermal conditioning of a reception structure comprising electronic heat dissipating equipment, said equipment being arranged in the reception structure in superimposed rows according to a given direction, each row being further constituted of juxtaposed equipment, each equipment being separated from its neighbors by a free space, each row being further separated from the neighboring rows by a free space.
- the device comprises means for ensuring the flow of a forced air stream in a direction parallel to the superposition direction of the rows of equipment as well as means for ensuring a regular cooling of the air stream forced during his move to the reception facility. These means are also arranged at the level of the free spaces separating each row of equipment.
- the means for ensuring a regular cooling of the forced air flow during its movement in the host structure comprise a plurality of heat exchangers, a heat exchanger being disposed in the space separating two rows of consecutive equipment. Each exchanger thus performs the cooling of the air flow leaving one row before it enters the other row.
- the means for ensuring a regular cooling of the forced air stream during its movement in the host structure comprise a pipe.
- This pipe is configured to convey, at each space separating two juxtaposed rows, a stream of fresh forced air that mixes with the stream of air leaving a row so as to lower the temperature of the latter before he does not enter the next row.
- the means for ensuring a regular cooling of the forced air stream during its movement in the host structure comprise a plurality of forced ventilation means. These means are arranged at the level of the spaces separating the juxtaposed rows. Forced ventilation means comprises a turbine configured and arranged to blow outside air into the space separating two rows.
- the device according to the invention has the advantage of making a series-type ventilation system sufficiently effective to ensure the thermal conditioning of the active modules of an antenna comprising such modules, antenna whose structure is poorly adapted to the implementation a parallel type ventilation system.
- FIG. 3 the schematic illustration of a first known mode of thermal conditioning of a reception structure containing electronic cards
- FIGS. 4-a to 4-c illustrations highlighting the disadvantages presented by the various known solutions used to carry out the thermal conditioning of an active module antenna
- FIG. 5 a schematic illustration of the operating principle of the device according to the invention
- FIG. 5 which illustrates the principle of operation of the conditioning device according to the invention, is initially considered.
- the general structure of the device according to the invention comprises means for circulating a forced air stream for performing a series cooling of the electronic cards.
- the structure according to the invention also comprises means for preventing progressive heating of the forced air stream as it passes through the host structure.
- These means thus have the main function of cooling the current of circulating air, materialized by the arrows 53, at different points of its path through the host structure.
- said means are arranged in the free spaces 51 separating two consecutive rows 52 of electronic cards, the spaces separating two consecutive rows of racks for example.
- the combination of means thus formed advantageously makes it possible to implement air-flow thermal conditioning means in a compatible series mode of the particular structure of an active module antenna while eliminating the main disadvantage of series cooling which consists in cooling the electronic card by means of a flow of air whose temperature increases gradually as it propagates inside the host structure.
- FIG. 6 shows a first embodiment of the conditioning device according to the invention, and more particularly means for effecting the regular cooling of the forced air stream 61 carrying out the conditioning proper, air flow is ensured by means otherwise known, such as fans 65 for example.
- the means for cooling the forced air stream consist of heat exchanger devices 62 placed in the intervals separating two rows of consecutive cards. These devices are configured so that after passing through a heat exchanger the air stream 61 whose temperature had risen after passing through a row 63 of electronic cards found a given temperature to cool sufficiently the row of electronic cards 64 which follows.
- the exchangers used are air-air type exchangers which transfer the thermal energy conveyed by the air stream 61 to the air outside the receiving structure.
- the exchangers 62 used are air-liquid type exchangers which transfer the heat energy conveyed by the air stream 61 to a heat transfer fluid which is itself cooled by a heat exchange system 66 located at the same time. outside the reception structure.
- FIG. 7 shows a second embodiment of the conditioning device according to the invention, and more particularly means for effecting the regular cooling of the forced air stream 61 carrying out the actual conditioning.
- the means for cooling the forced air stream 61 are constituted by means for supplying fresh air to the forced air stream 61.
- These fresh air intakes, materialized by the arrows 72, are made at the free spaces 71 separating consecutive rows 73 and 74 of electronic cards.
- this fresh air intake can be achieved as illustrated in Figure 7 by means of a pipe 75 placed inside the host structure and responsible for conveying a stream of fresh air up to the level of each of the intervals separating the rows of electronic cards.
- a stream of fresh air can be conveyed separately at each interval separating the rows of electronic cards.
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0807215A FR2940530B1 (fr) | 2008-12-19 | 2008-12-19 | Architecture de refroidissement notamment pour antenne a modules actifs |
| PCT/EP2009/063364 WO2010069628A1 (fr) | 2008-12-19 | 2009-10-13 | Architecture de refroidissement notamment pour antenne a modules actifs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2368291A1 true EP2368291A1 (fr) | 2011-09-28 |
| EP2368291B1 EP2368291B1 (fr) | 2015-11-25 |
Family
ID=40845084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09783990.6A Active EP2368291B1 (fr) | 2008-12-19 | 2009-10-13 | Architecture de refroidissement notamment pour antenne a modules actifs |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2368291B1 (fr) |
| ES (1) | ES2559756T3 (fr) |
| FR (1) | FR2940530B1 (fr) |
| WO (1) | WO2010069628A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022091026A1 (fr) | 2020-10-29 | 2022-05-05 | Leonardo S.P.A. | Architecture innovante en forme d'u à trois dimensions pour des modules d'émission/réception de systèmes aesa |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3818386A (en) * | 1967-04-03 | 1974-06-18 | Texas Instruments Inc | Solid-state modular microwave system |
| US6005531A (en) * | 1998-09-23 | 1999-12-21 | Northrop Grumman Corporation | Antenna assembly including dual channel microwave transmit/receive modules |
| US7129908B2 (en) * | 2004-06-08 | 2006-10-31 | Lockheed Martin Corporation | Lightweight active phased array antenna |
| US7908874B2 (en) * | 2006-05-02 | 2011-03-22 | Raytheon Company | Method and apparatus for cooling electronics with a coolant at a subambient pressure |
-
2008
- 2008-12-19 FR FR0807215A patent/FR2940530B1/fr not_active Expired - Fee Related
-
2009
- 2009-10-13 ES ES09783990.6T patent/ES2559756T3/es active Active
- 2009-10-13 WO PCT/EP2009/063364 patent/WO2010069628A1/fr not_active Ceased
- 2009-10-13 EP EP09783990.6A patent/EP2368291B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010069628A1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022091026A1 (fr) | 2020-10-29 | 2022-05-05 | Leonardo S.P.A. | Architecture innovante en forme d'u à trois dimensions pour des modules d'émission/réception de systèmes aesa |
| US12476381B2 (en) | 2020-10-29 | 2025-11-18 | Leonardo S.P.A. | Innovative three-dimensional U-shaped architecture for transmit/receive modules of AESA systems |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010069628A1 (fr) | 2010-06-24 |
| EP2368291B1 (fr) | 2015-11-25 |
| ES2559756T3 (es) | 2016-02-15 |
| FR2940530B1 (fr) | 2011-03-11 |
| FR2940530A1 (fr) | 2010-06-25 |
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