EP0496388A2 - Vorrichtung zum Heizen von Antennen auf der Basis von Kohlefasern, insbesondere zur Verwendung im Weltraum - Google Patents

Vorrichtung zum Heizen von Antennen auf der Basis von Kohlefasern, insbesondere zur Verwendung im Weltraum Download PDF

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Publication number
EP0496388A2
EP0496388A2 EP92101035A EP92101035A EP0496388A2 EP 0496388 A2 EP0496388 A2 EP 0496388A2 EP 92101035 A EP92101035 A EP 92101035A EP 92101035 A EP92101035 A EP 92101035A EP 0496388 A2 EP0496388 A2 EP 0496388A2
Authority
EP
European Patent Office
Prior art keywords
antennas
heating
field
carbon
fact
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.)
Withdrawn
Application number
EP92101035A
Other languages
English (en)
French (fr)
Other versions
EP0496388A3 (en
Inventor
Giovanni Pellegrineschi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alenia Spazio SpA
Original Assignee
Selenia Spazio SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Selenia Spazio SpA filed Critical Selenia Spazio SpA
Publication of EP0496388A2 publication Critical patent/EP0496388A2/de
Publication of EP0496388A3 publication Critical patent/EP0496388A3/en
Withdrawn legal-status Critical Current

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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 a heating device to be applied to the reflecting surfaces of antennas and based on the use of carbon fibers.
  • the main objective pursued by the solution proposed by the invention is to achieve with the use of the mentioned carbon fibers the possibility of performing several functions at the same time, namely:
  • the large reflector antennas (paraboloidal or similar) have almost always a need for a deicing system, generally based on heaters which prevent the snow and ice from sticking. In fact, if such elements are allowed to accumulate on the reflecting surfaces, the performance of the antenna is impaired.
  • a thermal control either of these reflecting surfaces or of other structural elements can also be required in other types of antennas such as the ones provided on the board of satellites, in order to insure dimensional stability.
  • the reflecting surfaces or the other thermally controlled parts are heated by means of electric resistors made of metallic wire and electrically insulated on the antenna structure, connected with the surfaces to be heated, generally on the side which is opposite to the one upon which the waves reflect.
  • heating method are based on hot-air emission, blown onto the surfaces or on the irradiation of the latter by means of infrared rays.
  • the heating system which is object of the present patent application is based on the use of carbon fiber.
  • This fiber can:
  • Fig. 1 shows schematically the panel consisting of composite material to be applied to the surfaces to be heated.
  • the Figure shows in plan and in section an example of a panel with carbon fibers. The following elements can be discerned therein:
  • the binding material of carbon-fiber element 5 can be an epoxy polyester resin or another material. Further, the operation of the device of the invention is described, with reference to the attached drawing in an illustrative but non-limitative manner, taking into account that the description of either the physical-structural composition of the invention device or its operation refer to a solution which is actually preferred by the inventor, but nothing prevents variations in its configuration as long as the results pursued by the invention are not altered.
  • the value of the voltage is selected in accordance with the superficial resistivity of the carbon fabric, the manufactured shape of the electrodes, and also the specific power (W/m2) which will dissipate according to the formula:
  • the electrodes suitably and/or by varying the thickness of the layers, it is possible to insure that W will be approximately constant on panels whose shape is not rectangular, for instance on trapezoidal, triangular shapes, etc, and also on shapes with double curvature.
  • the expansion coefficient of carbon fiber is, as known, much lower (ranging from one hundredth to one thousandth of the expansion coefficient of metal), therefore the deformations caused by temperature are minor.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)
EP19920101035 1991-01-23 1992-01-23 Carbon-fiber based device for heating antennas, preferably for use in space Withdrawn EP0496388A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM910047A IT1244904B (it) 1991-01-23 1991-01-23 Dispositivo di riscaldamento per antenne a base di fibre di carbonio, da utilizzare preferenzialmente per uso spaziale.
ITRM910047 1991-01-23

Publications (2)

Publication Number Publication Date
EP0496388A2 true EP0496388A2 (de) 1992-07-29
EP0496388A3 EP0496388A3 (en) 1992-12-09

Family

ID=11399772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920101035 Withdrawn EP0496388A3 (en) 1991-01-23 1992-01-23 Carbon-fiber based device for heating antennas, preferably for use in space

Country Status (2)

Country Link
EP (1) EP0496388A3 (de)
IT (1) IT1244904B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997040646A1 (en) * 1996-04-19 1997-10-30 Thermion Systems International Method for heating the surface of an antenna dish
US5942140A (en) * 1996-04-19 1999-08-24 Thermion Systems International Method for heating the surface of an antenna dish
US5954977A (en) * 1996-04-19 1999-09-21 Thermion Systems International Method for preventing biofouling in aquatic environments
US5966501A (en) * 1996-04-19 1999-10-12 Themion Systems International Method for controlling the viscosity of a fluid in a defined volume
US5981911A (en) * 1996-04-19 1999-11-09 Thermicon Systems International Method for heating the surface of a food receptacle
US6018141A (en) * 1996-04-19 2000-01-25 Thermion Systems International Method for heating a tooling die
US6145787A (en) * 1997-05-20 2000-11-14 Thermion Systems International Device and method for heating and deicing wind energy turbine blades
FR3041104A1 (fr) * 2015-09-14 2017-03-17 Plastic Omnium Cie Dispositif chauffant de protection d'un radar de vehicule automobile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030479A1 (de) * 1979-12-11 1981-06-17 RAYCHEM CORPORATION (a California corporation) Leitendes Element und Verfahren zu dessen Herstellung
US4955129A (en) * 1989-01-30 1990-09-11 Ford Aerospace Corporation Method of making an integral heater for composite structure
US4972197A (en) * 1987-09-03 1990-11-20 Ford Aerospace Corporation Integral heater for composite structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030479A1 (de) * 1979-12-11 1981-06-17 RAYCHEM CORPORATION (a California corporation) Leitendes Element und Verfahren zu dessen Herstellung
US4972197A (en) * 1987-09-03 1990-11-20 Ford Aerospace Corporation Integral heater for composite structure
US4955129A (en) * 1989-01-30 1990-09-11 Ford Aerospace Corporation Method of making an integral heater for composite structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997040646A1 (en) * 1996-04-19 1997-10-30 Thermion Systems International Method for heating the surface of an antenna dish
US5942140A (en) * 1996-04-19 1999-08-24 Thermion Systems International Method for heating the surface of an antenna dish
US5954977A (en) * 1996-04-19 1999-09-21 Thermion Systems International Method for preventing biofouling in aquatic environments
US5966501A (en) * 1996-04-19 1999-10-12 Themion Systems International Method for controlling the viscosity of a fluid in a defined volume
US5981911A (en) * 1996-04-19 1999-11-09 Thermicon Systems International Method for heating the surface of a food receptacle
US6018141A (en) * 1996-04-19 2000-01-25 Thermion Systems International Method for heating a tooling die
US6145787A (en) * 1997-05-20 2000-11-14 Thermion Systems International Device and method for heating and deicing wind energy turbine blades
FR3041104A1 (fr) * 2015-09-14 2017-03-17 Plastic Omnium Cie Dispositif chauffant de protection d'un radar de vehicule automobile

Also Published As

Publication number Publication date
IT1244904B (it) 1994-09-13
ITRM910047A0 (it) 1991-01-23
ITRM910047A1 (it) 1992-07-23
EP0496388A3 (en) 1992-12-09

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