FR2165739A1 - Radar reflector bodies - comprising a rigid (polyurethane) foam dish with polyester impregnated glass cloth covers - Google Patents

Radar reflector bodies - comprising a rigid (polyurethane) foam dish with polyester impregnated glass cloth covers

Info

Publication number
FR2165739A1
FR2165739A1 FR7147002A FR7147002A FR2165739A1 FR 2165739 A1 FR2165739 A1 FR 2165739A1 FR 7147002 A FR7147002 A FR 7147002A FR 7147002 A FR7147002 A FR 7147002A FR 2165739 A1 FR2165739 A1 FR 2165739A1
Authority
FR
France
Prior art keywords
glass cloth
rigid
polyurethane
impregnated glass
radar reflector
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
Application number
FR7147002A
Other languages
French (fr)
Other versions
FR2165739B1 (en
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.)
Laboratoire Central de Telecommunications SA
Original Assignee
Laboratoire Central de Telecommunications SA
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 Laboratoire Central de Telecommunications SA filed Critical Laboratoire Central de Telecommunications SA
Priority to FR7147002A priority Critical patent/FR2165739A1/en
Publication of FR2165739A1 publication Critical patent/FR2165739A1/en
Application granted granted Critical
Publication of FR2165739B1 publication Critical patent/FR2165739B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a general shape other than plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
    • H01Q15/142—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface
    • H01Q15/144—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface with a honeycomb, cellular or foamed sandwich structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass
    • B32B2315/085—Glass fiber cloth or fabric

Abstract

Structural blocks with a reflecting surface, are made by producing approx. the required shape in a rigid expanded resin which is stoved, machined, post-cured and then polished to get exactly the required surface profile. A surface skin of glass cloth or metallised glass is then secured by a polyester resin adhesive with vacuum assistance to the surface of the block, and the other surfaces of the block are trimmed less precisely to shape and also clad with a skin of glass cloth. Pref. foam core is of expanded rigid polyurethane.
FR7147002A 1971-12-28 1971-12-28 Radar reflector bodies - comprising a rigid (polyurethane) foam dish with polyester impregnated glass cloth covers Granted FR2165739A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7147002A FR2165739A1 (en) 1971-12-28 1971-12-28 Radar reflector bodies - comprising a rigid (polyurethane) foam dish with polyester impregnated glass cloth covers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7147002A FR2165739A1 (en) 1971-12-28 1971-12-28 Radar reflector bodies - comprising a rigid (polyurethane) foam dish with polyester impregnated glass cloth covers

Publications (2)

Publication Number Publication Date
FR2165739A1 true FR2165739A1 (en) 1973-08-10
FR2165739B1 FR2165739B1 (en) 1976-03-26

Family

ID=9088224

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7147002A Granted FR2165739A1 (en) 1971-12-28 1971-12-28 Radar reflector bodies - comprising a rigid (polyurethane) foam dish with polyester impregnated glass cloth covers

Country Status (1)

Country Link
FR (1) FR2165739A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533494A1 (en) * 1982-09-28 1984-03-30 Thomson Csf PROCESS FOR MANUFACTURING REFLECTORS IN PLASTIC MATERIALS

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029433A (en) * 1958-06-13 1962-04-10 Republic Aviat Corp Radar reflector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029433A (en) * 1958-06-13 1962-04-10 Republic Aviat Corp Radar reflector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533494A1 (en) * 1982-09-28 1984-03-30 Thomson Csf PROCESS FOR MANUFACTURING REFLECTORS IN PLASTIC MATERIALS
EP0105007A1 (en) * 1982-09-28 1984-04-04 Thomson-Csf Process for the manufacture of a plastic wave reflector, and reflector made by this method

Also Published As

Publication number Publication date
FR2165739B1 (en) 1976-03-26

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Legal Events

Date Code Title Description
CA Change of address
TP Transmission of property
ST Notification of lapse