GB1121999A - Improvements in or relating to reflectors for electromagnetic waves - Google Patents

Improvements in or relating to reflectors for electromagnetic waves

Info

Publication number
GB1121999A
GB1121999A GB51803/65A GB5180365A GB1121999A GB 1121999 A GB1121999 A GB 1121999A GB 51803/65 A GB51803/65 A GB 51803/65A GB 5180365 A GB5180365 A GB 5180365A GB 1121999 A GB1121999 A GB 1121999A
Authority
GB
United Kingdom
Prior art keywords
blocks
cellular material
coating
block
synthetic resin
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.)
Expired
Application number
GB51803/65A
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.)
MARCEL ALEXIS MORIHAIN
Original Assignee
MARCEL ALEXIS MORIHAIN
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 MARCEL ALEXIS MORIHAIN filed Critical MARCEL ALEXIS MORIHAIN
Publication of GB1121999A publication Critical patent/GB1121999A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

An electromagnetic wave reflector comprises a reflecting layer for such waves which is supported on at least one rigid block of an expanded cellular material having a density of from 0.5 to 0.8gm/cc. The said material is made by grinding together, in the presence of moisture, siliceous sand, cement, and aluminium powder and hardening it in an autoclave after expansion. Following any machining of the block, the working surface may be partially vitrified by a flame and a metallic coating be deposited by spraying or otherwise. Alternatively, a synthetic resin coating may be applied to the working face, which is left unvitrified, and be followed by a metallic coating, or a single coating of synthetic resin loaded with metallic particles may be used. Any of the aforesaid coatings may be machined, for greater precision. Blocks may be joined together with adhesive and any remaining exposed surfaces may be sealed against moisture penetration. A part paraboloidal aerial is described, wherein the reflector assembly (5), Figs. 5, 6 (not shown) comprises four blocks (1a), (1b), (1c), (1d) and an arm (6) of the same cellular material, which is cemented to the assembly for carrying the feed horn (7). In another arrangement, a paraboloidal reflector comprises a centre block (22) and a number of petal blocks (21), all made of the expanded cellular material, which are cemented together.
GB51803/65A 1964-12-09 1965-12-07 Improvements in or relating to reflectors for electromagnetic waves Expired GB1121999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR998024A FR1445474A (en) 1964-12-09 1964-12-09 Process for the manufacture of wave collecting devices comprising a reflecting wall and devices obtained by such a process

Publications (1)

Publication Number Publication Date
GB1121999A true GB1121999A (en) 1968-07-31

Family

ID=8844434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51803/65A Expired GB1121999A (en) 1964-12-09 1965-12-07 Improvements in or relating to reflectors for electromagnetic waves

Country Status (4)

Country Link
DE (1) DE1466176B1 (en)
FR (1) FR1445474A (en)
GB (1) GB1121999A (en)
NL (1) NL6515854A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396436A1 (en) * 1977-06-29 1979-01-26 Mitsubishi Electric Corp IMPROVEMENTS TO ANTENNAS WITH TWO REFLECTORS
GB2120854A (en) * 1982-04-16 1983-12-07 Fastwool Limited Antennas
GB2150355A (en) * 1983-11-26 1985-06-26 Epic Engineering Group Limited Antenna reflector
EP1835566A1 (en) * 2003-07-29 2007-09-19 Hitec Luxembourg S. A. Method for manufacturing an antenna reflector
FR2943184A1 (en) * 2009-03-13 2010-09-17 Analyse Et Conception De Struc Making a reflector R for space applications, comprises cutting a crude block of carbon-carbon composite material, milling a top of the crude block for fixing a back side of the reflector, and milling an underside of the crude block

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA828131B (en) * 1981-11-05 1983-09-28 Pico Savac Inc Reflector and method for making the same
DE3545096A1 (en) * 1985-12-19 1987-07-09 Schaefer Geb Laval Marlene METHOD FOR PRODUCING A RADAR REFLECTOR

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE891556C (en) * 1951-09-29 1953-09-28 Lorenz C Ag Large diameter parabolic reflector
DE1765806U (en) * 1957-11-01 1958-04-30 Telefunken Gmbh REFLECTOR.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396436A1 (en) * 1977-06-29 1979-01-26 Mitsubishi Electric Corp IMPROVEMENTS TO ANTENNAS WITH TWO REFLECTORS
GB2120854A (en) * 1982-04-16 1983-12-07 Fastwool Limited Antennas
GB2150355A (en) * 1983-11-26 1985-06-26 Epic Engineering Group Limited Antenna reflector
EP1835566A1 (en) * 2003-07-29 2007-09-19 Hitec Luxembourg S. A. Method for manufacturing an antenna reflector
FR2943184A1 (en) * 2009-03-13 2010-09-17 Analyse Et Conception De Struc Making a reflector R for space applications, comprises cutting a crude block of carbon-carbon composite material, milling a top of the crude block for fixing a back side of the reflector, and milling an underside of the crude block

Also Published As

Publication number Publication date
NL6515854A (en) 1966-06-10
FR1445474A (en) 1966-07-15
DE1466176B1 (en) 1971-09-16

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