EP0903807A2 - Method for producing a lens for an antenna - Google Patents

Method for producing a lens for an antenna Download PDF

Info

Publication number
EP0903807A2
EP0903807A2 EP98111130A EP98111130A EP0903807A2 EP 0903807 A2 EP0903807 A2 EP 0903807A2 EP 98111130 A EP98111130 A EP 98111130A EP 98111130 A EP98111130 A EP 98111130A EP 0903807 A2 EP0903807 A2 EP 0903807A2
Authority
EP
European Patent Office
Prior art keywords
lens
shell
antenna
lens core
partial shells
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Withdrawn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
EP98111130A
Other languages
German (de)
French (fr)
Other versions
EP0903807A3 (en
Inventor
Jürgen Lier
Jörg SCHNEEMANN
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.)
Telent GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0903807A2 publication Critical patent/EP0903807A2/en
Publication of EP0903807A3 publication Critical patent/EP0903807A3/en
Withdrawn legal-status Critical Current

Links

Images

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
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H01Q15/08—Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material

Definitions

  • the present invention relates to a method for Manufacture of an antenna lens consisting of a Lens core and a surrounding coating layer.
  • Antenna lenses made of a dielectric material are described in US Pat. No. 4,769,646. These antenna lenses can have planar or structured surfaces, depending on which beam shaping is to be achieved with them.
  • a known surface structure of an antenna lens is the so-called Fresnel structure.
  • dielectric materials for the lens which have a very high dielectric constant ( ⁇ > 9).
  • ceramic materials meet this requirement for a high dielectric constant.
  • the lens body which consists of a ceramic material, is surrounded by a coating layer in order to reduce reflections on the antenna lens as much as possible.
  • This coating layer is most effective if it consists of a material with a dielectric constant that corresponds approximately to the square root of the dielectric constant of the lens core made of ceramic material.
  • the coating layer with which the lens core is coated consists of a plastic.
  • the invention lies therefore based on the task of a manufacturing process to specify an antenna lens of the type mentioned at the outset, whose manufacturing outlay is as low as possible.
  • the liquid, powdery or pasty material becomes preferably introduced through an opening in the shell, which is then closed again.
  • material for the lens core comes e.g. Plastics and mixtures of Plastic with ceramic materials in question.
  • the antenna lens are in a first Process step two rigid partial shells 1 and 2 manufactured according to the desired Surface structure of the lens are shaped.
  • the illustrated embodiment is the surface of the two partial shells 1 and 2 smooth. Deviating from this, however any other remaining structure, e.g. Fresnel structure, will be realized.
  • the two partial shells 1 and 2 are made made of a plastic whose dielectric constant the square root of the electricity constant of the actual lens material, the one below lens core described corresponds. Under this The partial shells 1 and 2 are an ideal requirement Coating layer for the lens.
  • a plastic material for partial lenses 1 and 2 come e.g. Plexiglass, polycarbonate or similar other materials in question. Suitable Marerials are e.g.
  • cyclodefin copolymers also cyclodefin copolymers, Polyolefins, polyphenylene ethers, acrylonitride, styrene, Acrylic ester polymer and modified styrene polymers. If for the partial shells a dielectric constant less than 2 the substances listed above may be required can also be used in foamed form.
  • the partial shells 1 and 2 can be produced using common methods such as e.g. Deep drawing or injection molding with a wall thickness between 2 and 10 mm can be manufactured.
  • the planar partial shell 2 can e.g. can also be an extruded or cast sheet.
  • the two separately manufactured partial shells 1 and 2 are then assembled into a closed shell, by being at the separation point 3 by welding, gluing or with other suitable joining techniques (e.g. Snap connection).
  • the described shell 1, 2 has on the one hand the function of a coating layer for the lens and on the other hand it forms a firmly delimited space which defines the shape of the antenna lens.
  • This space is now filled with a liquid or powdery or pasty material 5, which forms the lens core.
  • the liquid, powdery or pasty material 5 is selected so that it has a dielectric constant required for the lens core.
  • Suitable materials are, for example, polyethylene or polypropylene or a ceramic material such as Al 2 O 3 , TiO 2 or CaZO x .
  • powdery or pasty material 5 in to be able to introduce the cavity of the shell 1, 2 in the shell an opening 4 is provided, which after Introducing the material is closed again.

Abstract

The method involves manufacturing a stiff shell (1, 2) defining the shape of the lens and forming the heat treated film and filling the hollow chamber of the shell with a liquid, powdered or paste material forming the lens core (5).

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft ein Verfahren zum Herstellen einer Antennenlinse, bestehend aus einem Linsenkern und einer diesen umgebenden Vergütungsschicht.The present invention relates to a method for Manufacture of an antenna lens consisting of a Lens core and a surrounding coating layer.

In der US 4,769,646 sind aus einem dielektrischen Material bestehende Antennenlinsen beschrieben. Diese Antennenlinsen können planare oder auch strukturierte Oberflächen aufweisen, je nachdem welche Strahlformung damit realisiert werden soll. Eine bekannte Oberflächenstruktur einer Antennenlinse ist die sogenannte Fresnel-Struktur. Damit Antennenlinsen eine möglichst kompakte Bauform erhalten, müssen sie eine kurze Brennweite haben. Dies läßt sich mit dielektrischen Materialien für die Linse erreichen, die eine sehr hohe Dielektrizitätskonstante (ε > 9) aufweisen. Wie aus der, eine dielektrische Antennenlinse offenbarenden US 5,154,973 hervorgeht, erfüllen Keramikmaterialien diese Forderung nach einer hohen Dielektrizitätskonstanten. Als geeignete Keramikmaterialien werden dort beispielsweise CaTiO3, SrTiO3, BaO-Nd2O3-TiO2, BaTiO3 und ZnO angegeben. Gemäß der US 5,154,973 wird der aus einem Keramikmaterial bestehende Linsenkörper mit einer Vergütungsschicht umgeben, um Refklexionen an der Antennenlinse möglichst weitgehend zu reduzieren. Diese Vergütungsschicht ist dann am wirksamsten, wenn sie aus einem Material mit einer Dielektrizitätskonstanten besteht, die etwa der Quadratwurzel der Dielektrizitätskonstanten des aus Keramikmaterial bestehenden Linsenkerns entspricht. Die Vergütungsschicht, mit der der Linsenkern überzogen wird, besteht gemäß diesem Stand der Technik aus einem Kunststoff.Antenna lenses made of a dielectric material are described in US Pat. No. 4,769,646. These antenna lenses can have planar or structured surfaces, depending on which beam shaping is to be achieved with them. A known surface structure of an antenna lens is the so-called Fresnel structure. In order for antenna lenses to be as compact as possible, they must have a short focal length. This can be achieved with dielectric materials for the lens, which have a very high dielectric constant (ε> 9). As can be seen from US 5,154,973, which discloses a dielectric antenna lens, ceramic materials meet this requirement for a high dielectric constant. CaTiO 3 , SrTiO 3 , BaO-Nd 2 O 3 -TiO 2 , BaTiO 3 and ZnO are given as suitable ceramic materials. According to US Pat. No. 5,154,973, the lens body, which consists of a ceramic material, is surrounded by a coating layer in order to reduce reflections on the antenna lens as much as possible. This coating layer is most effective if it consists of a material with a dielectric constant that corresponds approximately to the square root of the dielectric constant of the lens core made of ceramic material. According to this prior art, the coating layer with which the lens core is coated consists of a plastic.

Erfahruugsgemäß ist die Herstellung von keramischen Linsen, deren Durchmesser größer als 20 cm ist, mit einem hohen verfahrenstechnischen Aufwand verbunden. Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zum Herstellen einer Antennenlinse der eingangs genannten Art anzugeben, dessen fertigungstechnischer Aufwand möglichst gering ist.Experience has shown that the manufacture of ceramic lenses whose diameter is larger than 20 cm, with a high procedural effort connected. The invention lies therefore based on the task of a manufacturing process to specify an antenna lens of the type mentioned at the outset, whose manufacturing outlay is as low as possible.

Vorteile der ErfindungAdvantages of the invention

Die genannte Aufgabe wird mit den Merkmalen des Anspruchs 1 dadurch gelöst, daß eine die Vergütungsschicht bildende, die Form der Linse vorgebende steife Schale hergestellt wird und daß der Hohlraum der Schale mit einem den Linsenkern bildenden flüssigen, pulverförmigen oder pastösen Material ausgefüllt wird. Die die Vergütungsschicht bildende Schale, welche ja nicht aus einem keramischen Material besteht, läßt sich auf einfache Weise mit üblichen Verfahren herstellen. Das Ausfüllen des Hohlraums der Schale mit einem flüssigen, pulverförmigen oder pastösen Material ist ebenfalls verfahrenstechnisch sehr einfach durchzuführen.This object is achieved with the features of claim 1 solved in that a Form of the lens stiff shell is produced and that the cavity of the shell with one the lens nucleus forming liquid, powder or pasty material is filled out. The shell that forms the coating layer, which does not consist of a ceramic material produce themselves in a simple manner using conventional methods. Filling the cavity of the shell with a liquid, powdery or pasty material is also procedurally very easy to carry out.

Vorteilhafte Ausführungen der Erfindung gehen aus den Unteransprüchen hervor. Danach ist es zweckmäßig, die Schale aus zwei separaten Teilschalen herzustellen und diese anschließend zu einer geschlossenen Schale zusammenzusetzen. Die Schale kann aus einem Kunststoff durch ein Tiefziehverfahren oder durch Spritzguß hergestellt werden. Advantageous embodiments of the invention are based on the Sub-claims emerge. After that, it is convenient to use the bowl to produce from two separate partial shells and this then put together into a closed bowl. The shell can be made from a plastic Thermoforming processes or by injection molding.

Das flüssige, pulverförmige oder pastöse Material wird vorzugsweise durch eine Öffnung in der Schale eingebracht, die anschließend wieder verschlossen wird. Als Material für den Linsenkern kommen z.B. Kunststoffe sowie Mischungen aus Kunststoff mit keramischen Materialien in Frage.The liquid, powdery or pasty material becomes preferably introduced through an opening in the shell, which is then closed again. As material for the lens core comes e.g. Plastics and mixtures of Plastic with ceramic materials in question.

Beschreibung eines AusführungsbeispielsDescription of an embodiment

Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels wird nachfolgend die Erfindung näher erläutert.Using one shown in the drawing The invention is described in more detail below explained.

Die einzige Figur in der Zeichnung zeigt einen Querschnitt durch eine Antennenlinse.The only figure in the drawing shows a cross section through an antenna lens.

Zur Herstellung der Antennenlinse werden in einem ersten Verfahrensschritt zwei steifen Teilschalen 1 und 2 gefertigt, die entsprechend der gewünschten Oberflächenstruktur der Linse geformt sind. In dem dargestellten Ausführungsbeispiel ist die Oberfläche der beiden Teilschalen 1 und 2 glatt. Davon abweichend kann aber jede andere bliebige Struktur, z.B. Fresnel-Struktur, realisiert werden. Die beiden Teilschalen 1 und 2 werden aus einem Kunststoff gefertigt, dessen Dielektrizitätskonstante der Quadratwurzel der Elektrizitatskonstanten des eigentlichen Linsenmaterials, des weiter unten noch beschriebenen Linsenkerns, entspricht. Unter dieser Voraussetzung bilden die Teilschalen 1 und 2 eine ideale Vergütungsschicht für die Linse. Als Kunststoffmaterial für die Teillinsen 1 und 2 kommen z.B. Plexiglas, Polycarbonat oder ähnliche andere Materialien in Frage. Geeignete Marerialien sind z.B. auch Cyklodefincopolymere, Polyolefine, Polyphenylenether, Acrylnitrid, Styrol, Acrylester-Polymer sowie modifizierte Styrolpolymere. Falls für die Teilschalen eine Dielektrizitätskonstante kleiner 2 erforderlich ist, können die vorangehend aufgeführten Stoffe auch in geschäumter Form verwendet werden.To manufacture the antenna lens are in a first Process step two rigid partial shells 1 and 2 manufactured according to the desired Surface structure of the lens are shaped. By doing The illustrated embodiment is the surface of the two partial shells 1 and 2 smooth. Deviating from this, however any other remaining structure, e.g. Fresnel structure, will be realized. The two partial shells 1 and 2 are made made of a plastic whose dielectric constant the square root of the electricity constant of the actual lens material, the one below lens core described corresponds. Under this The partial shells 1 and 2 are an ideal requirement Coating layer for the lens. As a plastic material for partial lenses 1 and 2 come e.g. Plexiglass, polycarbonate or similar other materials in question. Suitable Marerials are e.g. also cyclodefin copolymers, Polyolefins, polyphenylene ethers, acrylonitride, styrene, Acrylic ester polymer and modified styrene polymers. If for the partial shells a dielectric constant less than 2 the substances listed above may be required can also be used in foamed form.

Die Teilschalen 1 und 2 können durch gängige Verfahren wie z.B. Tiefziehen oder Spritzguß mit einer Wanddicke zwischen 2 und 10 mm hergestellt werden. Die planare Teilschale 2 kann z.B. auch eine extrudierte oder gegossene Platte sein.The partial shells 1 and 2 can be produced using common methods such as e.g. Deep drawing or injection molding with a wall thickness between 2 and 10 mm can be manufactured. The planar partial shell 2 can e.g. can also be an extruded or cast sheet.

Die beiden separat gefertigten Teilschalen 1 und 2 werden anschließend zu einer geschlossenen Schale zusammengefügt, indem sie an der Trennstelle 3 durch Schweißen , Kleben oder mit anderen geeigneten Verbindungstechniken (z.B. Schnappverbindung) miteinander verbunden werden.The two separately manufactured partial shells 1 and 2 are then assembled into a closed shell, by being at the separation point 3 by welding, gluing or with other suitable joining techniques (e.g. Snap connection).

Die beschriebene Schale 1, 2 hat einerseits die Funktion einer Vergütungsschicht für die Linse und andererseits bildet sie einen fest umgrenzten, die Form der Antennenlinse vorgebenden Raum. Dieser Raum wird nun mit einem flüssigen oder pulverförmigen oder pastösen Material 5 ausgefüllt, das den Linsenkern bildet. Das flüssige, pulverförmige oder pastöse Material 5 ist so ausgewählt, daß es eine für den Linsenkern erforderliche Dielektrizitätskonstante aufweist. Geeignete Materialien sind z.B. Polyethylen oder Polypropylen oder ein keramisches Material wie z.B. Al2O3, TiO2 oder CaZOx.The described shell 1, 2 has on the one hand the function of a coating layer for the lens and on the other hand it forms a firmly delimited space which defines the shape of the antenna lens. This space is now filled with a liquid or powdery or pasty material 5, which forms the lens core. The liquid, powdery or pasty material 5 is selected so that it has a dielectric constant required for the lens core. Suitable materials are, for example, polyethylene or polypropylene or a ceramic material such as Al 2 O 3 , TiO 2 or CaZO x .

Um das flüssige, pulverförmige oder pastöse Material 5 in den Hohlraum der Schale 1, 2 einbringen zu können, ist in der Schale eine Öffnung 4 vorgesehen, die nach dem Einbringen des Materials wieder verschlossen wird.To the liquid, powdery or pasty material 5 in to be able to introduce the cavity of the shell 1, 2 in the shell an opening 4 is provided, which after Introducing the material is closed again.

Claims (9)

Verfahren zum Herstellen einer Antennenlinse, bestehend aus einem Linsenkern (5) und einer diesen umgebenden Vergütungsschicht (1, 2), dadurch gekennzeichnet, daß eine die Vergütungsschicht bildende, die Form der Linse vorgebende steife Schale (1, 2) hergestellt wird und daß der Hohlraum der Schale (1, 2) mit einem den Linsenkern bildenden flüssigen, pulverförmigen oder pastösen Material (5) ausgefüllt wird.Method for manufacturing an antenna lens, consisting of of a lens core (5) and a surrounding it Coating layer (1, 2), characterized in that a the coating layer, the shape of the lens stiff rigid shell (1, 2) is produced and that the Cavity of the shell (1, 2) with one of the lens core forming liquid, powder or pasty material (5) is filled out. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Schale aus zwei separat hergestellten Teilschalen (1, 2) zusammengesetzt wird.A method according to claim 1, characterized in that the shell from two separately produced partial shells (1, 2) is put together. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schale (1, 2) aus einem Kunststoff hergestellt wird.A method according to claim 1 or 2, characterized in that that the shell (1, 2) is made of a plastic. Verfahren nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Teilschalen (1, 2) im Tiefziehverfahren hergestellt werden.Method according to one of claims 2 or 3, characterized characterized in that the partial shells (1, 2) in Thermoforming processes are manufactured. Verfahren nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Teilschalen (1, 2) durch Spritzguß hergestellt werden.Method according to one of claims 2 or 3, characterized characterized in that the partial shells (1, 2) by injection molding getting produced. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das flüssige, pulverförmige oder pastöse Material (5) durch eine Öffnung (4) in der Schale (1) eingebracht wird und daß die Öffnung (4) anschließend verschlossen wird.A method according to claim 1, characterized in that the liquid, powdery or pasty material (5) through an opening (4) in the shell (1) is introduced and that the opening (4) is then closed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Linsenkern aus einem keramischen Material (5) gebildet wird.A method according to claim 1, characterized in that the lens core is formed from a ceramic material (5) becomes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Material (5) für den Linsenkern Kunststoff verwendet wird.A method according to claim 1, characterized in that used as material (5) for the lens core plastic becomes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Material (5) für den Linsenkern ein mit Keramik gefüllter Kunststoff verwendet wird.A method according to claim 1, characterized in that as material (5) for the lens core with ceramic filled plastic is used.
EP98111130A 1997-09-18 1998-06-17 Method for producing a lens for an antenna Withdrawn EP0903807A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19741081 1997-09-18
DE19741081A DE19741081C1 (en) 1997-09-18 1997-09-18 Method of making an antenna lens

Publications (2)

Publication Number Publication Date
EP0903807A2 true EP0903807A2 (en) 1999-03-24
EP0903807A3 EP0903807A3 (en) 2000-07-05

Family

ID=7842757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111130A Withdrawn EP0903807A3 (en) 1997-09-18 1998-06-17 Method for producing a lens for an antenna

Country Status (3)

Country Link
US (1) US6036893A (en)
EP (1) EP0903807A3 (en)
DE (1) DE19741081C1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000065691A1 (en) * 1999-04-23 2000-11-02 Telefonaktiebolaget Lm Ericsson (Publ) A method and arrangement pertaining to microwave lenses
US7301504B2 (en) 2004-07-14 2007-11-27 Ems Technologies, Inc. Mechanical scanning feed assembly for a spherical lens antenna

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000071291A (en) * 1998-08-27 2000-03-07 Murata Mfg Co Ltd Manufacture of dielectric lens
DE19963004A1 (en) * 1999-12-24 2001-06-28 Bosch Gmbh Robert Vehicle radar system, e.g. for adaptive cruise control has dielectric body in beam path heated by directly contacting electrically-conducting tracks of material with positive temperature coefficient
JP3664094B2 (en) * 2000-10-18 2005-06-22 株式会社村田製作所 Composite dielectric molded product, manufacturing method thereof, and lens antenna using the same
JP3700617B2 (en) * 2001-07-04 2005-09-28 株式会社村田製作所 Lens antenna
FR2838245A1 (en) * 2002-04-04 2003-10-10 Thomson Licensing Sa Structure of antenna used for LDMS telecommunications and multimedia networks, has a compact design and is lightweight
JP3599058B1 (en) * 2003-07-31 2004-12-08 住友電気工業株式会社 Luneberg lens and antenna device using the same
CN108701894B (en) * 2016-03-25 2021-05-18 康普技术有限责任公司 Antenna with lens formed of lightweight dielectric material and associated dielectric material
US11431100B2 (en) 2016-03-25 2022-08-30 Commscope Technologies Llc Antennas having lenses formed of lightweight dielectric materials and related dielectric materials
WO2018017518A2 (en) 2016-07-21 2018-01-25 Astronics Aerosat Corporation Multi-channel communications antenna
US10992052B2 (en) * 2017-08-28 2021-04-27 Astronics Aerosat Corporation Dielectric lens for antenna system
US11527835B2 (en) 2017-09-15 2022-12-13 Commscope Technologies Llc Methods of preparing a composite dielectric material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1030063A (en) * 1964-02-26 1966-05-18 North American Aviation Inc Luneberg-type microwave lens
US4482513A (en) * 1981-03-10 1984-11-13 General Dynamics, Pomona Division Method of molding foam/aluminum flake microwave lenses
JPS61100420A (en) * 1984-10-24 1986-05-19 Matsushita Electric Ind Co Ltd Manufacture of plastic lens
US5154973A (en) * 1989-12-07 1992-10-13 Murata Manufacturing Co., Ltd. Composite material for dielectric lens antennas
EP0632522A1 (en) * 1993-06-30 1995-01-04 Murata Manufacturing Co., Ltd. Dielectric lens for an antenna and manufacturing process thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716190A (en) * 1951-02-23 1955-08-23 Dow Chemical Co Dielectric material
US2887684A (en) * 1954-02-01 1959-05-19 Hughes Aircraft Co Dielectric lens for conical scanning
US3255451A (en) * 1963-01-02 1966-06-07 Whittaker Corp Conical scanning rotatable dielectric wedge lens which is dynamically balanced
US3321763A (en) * 1965-01-27 1967-05-23 Ikrath Kurt Inflatable microwave antenna with variable parameters
US3866234A (en) * 1973-12-26 1975-02-11 Us Navy Shaped ceramic dielectric antenna lens
US4458249A (en) * 1982-02-22 1984-07-03 The United States Of America As Represented By The Secretary Of The Navy Multi-beam, multi-lens microwave antenna providing hemispheric coverage
US4769646A (en) * 1984-02-27 1988-09-06 United Technologies Corporation Antenna system and dual-fed lenses producing characteristically different beams
CA1262571A (en) * 1986-12-09 1989-10-31 Yung L. Chow Radome-lens ehf antenna development
DE69427789T2 (en) * 1993-06-30 2002-04-18 Murata Manufacturing Co Method of manufacturing a dielectric lens for an antenna and dielectric lens by this method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1030063A (en) * 1964-02-26 1966-05-18 North American Aviation Inc Luneberg-type microwave lens
US4482513A (en) * 1981-03-10 1984-11-13 General Dynamics, Pomona Division Method of molding foam/aluminum flake microwave lenses
JPS61100420A (en) * 1984-10-24 1986-05-19 Matsushita Electric Ind Co Ltd Manufacture of plastic lens
US5154973A (en) * 1989-12-07 1992-10-13 Murata Manufacturing Co., Ltd. Composite material for dielectric lens antennas
EP0632522A1 (en) * 1993-06-30 1995-01-04 Murata Manufacturing Co., Ltd. Dielectric lens for an antenna and manufacturing process thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 281 (M-520), 25. September 1986 (1986-09-25) -& JP 61 100420 A (MATSUSHITA ELECTRIC IND CO LTD), 19. Mai 1986 (1986-05-19) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000065691A1 (en) * 1999-04-23 2000-11-02 Telefonaktiebolaget Lm Ericsson (Publ) A method and arrangement pertaining to microwave lenses
US6424318B1 (en) 1999-04-23 2002-07-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement pertaining to microwave lenses
US7301504B2 (en) 2004-07-14 2007-11-27 Ems Technologies, Inc. Mechanical scanning feed assembly for a spherical lens antenna

Also Published As

Publication number Publication date
EP0903807A3 (en) 2000-07-05
DE19741081C1 (en) 1999-03-18
US6036893A (en) 2000-03-14

Similar Documents

Publication Publication Date Title
DE2712437C2 (en) Mold made of thermoplastic material for the manufacture of contact lenses
DE2949951C2 (en)
DE19741081C1 (en) Method of making an antenna lens
DE2802237C2 (en) Injection mold for the production of injection molded parts consisting of at least two different plastic compounds and having at least two different areas
DE2826732C2 (en)
EP0064247B1 (en) Apparatus for producing moulded articles with non spherical surfaces
EP1358855A1 (en) Process for manufacturing parts by freeform laser-sintering
DE4222856C1 (en)
DE3712146A1 (en) METHOD FOR PRODUCING AN OPTICAL COMPONENT
DE1586593A1 (en) Egg box
DE2434383A1 (en) METHOD AND DEVICE FOR THE PRODUCTION OF HOLLOW SHAPED PARTS
EP0024515B1 (en) Process for manufacturing separating nozzles for separating gaseous or vaporous mixtures, particularly isotopic mixtures, and separating nozzles produced according to this process
DE1955033A1 (en) Process for the manufacture of filter elements and elements manufactured thereafter
DE19757836C1 (en) Process for the production of a double convex lens shade and mandrel for the production of this lens shade
EP0028284A1 (en) Heat exchanger of plastics material
DE2649526A1 (en) PROCESS FOR MANUFACTURING A MULTI-LAYER CONTAINER, MAINLY COMPOSED OF THERMOPLASTIC MATERIAL, AND MOLD FOR EXECUTING THE PROCESS
EP0043019A1 (en) Press tool for the manufacture of disk-like pressed bodies, particularly plates, dinner plates, cups, dishes or the like from pulverous, preferably ceramic material
EP0314160B1 (en) Casting apparatus for producing cast plastics
EP0513751A1 (en) Method and device for producing a columnar hollow body
EP0477590A2 (en) Method and apparatus for manufacturing column-shaped articles
DE60213363T2 (en) Method for producing a tool for optical plastic elements
DE3921631C2 (en)
DE2924472C2 (en) Process for making a coextruded article
DE2828832C3 (en) Extrusion die and process for its manufacture
DE2417270A1 (en) METHOD AND DEVICE FOR HEAT FORMING OF THIN-WALLED CONTAINERS MADE OF PLASTIC

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7H 01Q 19/06 A, 7H 01Q 15/04 B, 7H 01Q 1/08 B, 7H 01Q 1/28 B

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

17P Request for examination filed

Effective date: 20010313

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MARCONI COMMUNICATIONS GMBH

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20030911