EP0543664A2 - Parabolantenne und Verfahren zur Herstellung des Reflektorkörpers - Google Patents

Parabolantenne und Verfahren zur Herstellung des Reflektorkörpers Download PDF

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Publication number
EP0543664A2
EP0543664A2 EP92310635A EP92310635A EP0543664A2 EP 0543664 A2 EP0543664 A2 EP 0543664A2 EP 92310635 A EP92310635 A EP 92310635A EP 92310635 A EP92310635 A EP 92310635A EP 0543664 A2 EP0543664 A2 EP 0543664A2
Authority
EP
European Patent Office
Prior art keywords
reflector
support film
film
metal
sheet
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Withdrawn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
EP92310635A
Other languages
English (en)
French (fr)
Other versions
EP0543664A3 (en
Inventor
Koji Watanabe
Masaru Arakawa
Yukio Ojima
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.)
Nifco Inc
Original Assignee
Nifco Inc
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
Priority claimed from JP3331598A external-priority patent/JPH0750520A/ja
Priority claimed from JP33159791A external-priority patent/JPH0750519A/ja
Priority claimed from JP33159691A external-priority patent/JPH0746029A/ja
Priority claimed from JP33804091A external-priority patent/JPH0697726A/ja
Priority claimed from JP4758292A external-priority patent/JPH06132722A/ja
Priority claimed from JP23268492A external-priority patent/JPH0661731A/ja
Application filed by Nifco Inc filed Critical Nifco Inc
Publication of EP0543664A2 publication Critical patent/EP0543664A2/de
Publication of EP0543664A3 publication Critical patent/EP0543664A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H01Q19/023—Means for reducing undesirable effects for reducing the scattering of mounting structures, e.g. of the struts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/247—Supports; Mounting means by structural association with other equipment or articles with receiving set with frequency mixer, e.g. for direct satellite reception or Doppler radar

Definitions

  • This invention relates to a parabolic antenna and a method of manufacturing the reflector body of the same.
  • the reflector-type parabolic antenna comprises a reflector body, a converter, an arm having one end connected to the reflector body and the other end connected to the converter so as to hold the converter secured at a position corresponding to the focal point of the reflector body, and a support pole for supporting the reflector body, the reflector body including a reflector section and an antenna base holding the reflector section thereon.
  • reflector section is meant a reflector reinforced with a synthetic resin or like reinforcing material and not supported on the antenna base.
  • the arm which holds the converter secured in a position corresponding to the focal point of the reflector body is a press molded metal member with a rust-proof coating, it is nevertheless susceptible to rusting because it is used outdoors. Besides, it is expensive and heavy. Further, when the metal support pole of the antenna is stuck by lightning, the electric surge flowing through the pole, holder, bracket and arm is apt to destroy the converter and BS tuner it seves.
  • Japanese Patent Application Public Disclosure No. 58-161404 discloses a method of manufacturing a reflector body.
  • an aluminum sheet having a thickness of 0.3 to 0.6 mm is formed into a rotational paraboloid reflector having a concave front surface and a convex rear surface.
  • the entire reflector is formed with small holes having a diameter of about 1.25 mm or less.
  • a reflector body is formed using a lower die and an upper die respectively having a concave portion and a convex portion complementary to the convex rear and concave front surfaces of the reflector.
  • a synthetic resin sheet is placed on the concave portion of the lower die, then the reflector is placed with the convex rear surface down on the synthetic resin sheet, then a separate synthetic resin sheet is placed as an antenna base on the concave front surface of the reflector, and then the upper die is lowered onto the lower die while heating both the synthetic resin sheets, thus integrating the two synthetic resin sheets and the reflector sandwiched therebetween to thereby obtain the reflector body.
  • the above prior art method requires three pairs of upper and lower dies, one for forming an aluminum sheet into the reflector, another for forming small holes over the entire surface of the reflector and the remaining one for press forming the reflector body. This increases the cost of the equipment and processing.
  • the small holes formed in the reflector which are for making the two synthetic resin sheets integral with each other, should have a size not greater than one-twentieth the received wavelength in order to avoid deterioration of the antenna characteristics (this is why the diameter of the small holes is set in Japan to about 1.25 mm or less), but with such small holes, the mechanical strength of coupling of the two synthetic resin sheets is low, and the synthetic resin sheets are liable to detach from the reflector.
  • a third object of the invention is to provide a method of manufacturing the reflector body of a parabolic antenna having a reflector section and an antenna base, with the opposite side films of the reflector section coupled strongly to each other so as not to detach and with the reflector section and the antenna base coupled firmly so as not to detach.
  • a parabolic antenna comprising a reflector body having a focal point, a converter and an arm having one end connected to said reflector body and the other end connected to said converter so as to hold said converter at a fixed position corresponding to the focal point of said reflector body, characterized in that said arm is a hollow cylindrical plastic member.
  • the arm is a hollow cylindrical plastic member, it is safe from rusting, light in weight and obtainable at a low cost. Further, in the event that the support pole is struck by lightning, the converter and BS tuner are protected against destruction owing to the electric insulating action of the arm.
  • a method of manufacturing the reflector body for a parabolic antenna which comprises the steps of forming a sheet-like reflector section by providing a metal material on one surface of a support film made of a synthetic resin material, cutting the sheet-like reflector section to a size appropriate for the size of an antenna to be fabricated, and forming an antenna base of a synthetic resin material on the support film of the cut sheet-like reflector section with the reflector section held between dies for molding the antenna.
  • the sheet-like reflector section is prepared and then cut to the antenna size, and finally the synthetic resin antenna base is molded in the dies with the cut sheet-like reflector section inserted therebetween, such that the antenna base is formed integrally with the synthetic resin support film of the reflector section.
  • the reflector section and the antenna base comprise synthetic resin films of the same kind, it is safe from inter-film detachment.
  • Figure 1 schematically shows the construction of a parabolic antenna according to the invention, in which reference numeral 1 designates a reflector body (a BS antenna), numeral 2 a bracket secured to the back of the antenna, and numeral 3 a support pole.
  • a BS antenna a reflector body
  • numeral 2 a bracket secured to the back of the antenna
  • numeral 3 a support pole.
  • Two holder plates 4 are secured to the upper end portion of the support pole 3 in a clamping fashion with bolts 5 and nuts.
  • the bracket 2 is mounted at an adjustable angle on one of the holder plates.
  • the above structure is well known.
  • the bracket, support pole and holder plates are all made of metal.
  • the anttena further comprises an arm 10.
  • the arm 10 is shaped substantially like the letter J. It has an upright straight portion 11, an curved portion 13 and an oblique straight portion 14 extending obliquely upwardly.
  • the upright straight portion 11 has an upper end portion secured by a pair of upper and lower screws 9' to the back side of the bracket 2.
  • the obliquely straight portion 14 has a free end portion 15 to which a converter assembly 7 including a converter 6 is secured.
  • the upright and oblique straight portions 11 and 14 make an angle which is prescribed in Japan to be about 66° 43'.
  • the converter assembly 7 When the converter assembly 7 is secured to the free end portion 15 of the oblique straight portion 14 of the arm 10, the end 6' of the converter 6 facing the reflector body 1 is located at the focal point of the antenna. As shown in Figure 3, the converter assembly 7 has a projection 8 which projects into and is secured by a pair of upper and lower screws 9 to the free end portion 15 of the arm 10.
  • the arm 10 is a plastic molding. It is desirably formed by the blow molding method utilizing gas injection so that it has a large wall thickness and high mechanical strength.
  • the upper end portion 12 of the upright straight portion 11 of the arm has a D-shaped hollow sectional profile ( Figure 4) such that it has a flat and wide surface 12' in contact with the bracket 2.
  • This sectional profile permits the upper end portion 12 to be secured firmly by the pair of upper and lower screws 9' to the bracket 2, with the surface 12' in contact with the bracket 2.
  • two screw holes 16 are formed in each of the contact surface 12' and the surface of the upper end portion 12 opposite the contact surface 12', and the screws 9' are passed through the screw holes 16.
  • This arrangement permits the upper end portion 12 to be secured firmly to the bracket by two screws.
  • solid cylindrical pieces 17 of a metal may be pressure fitted in the holes 16 to reinforce the mechanical strength of securement.
  • the portion of the upright straight portion 11 exclusive of the upper end portion 12, the arcuate portion 13, and the portion of the oblique straight portion 14 exclusive of the free end portion 15 have a substantially oval hollow sectional profile with the four corners radiused large ( Figure 5).
  • the free end portion 15 of the oblique straight portion 14 has a hollow portion 19 made blind by an inner transversal wall 18 and is substantially quadrangular in sectional profile with the corners radiused small (Figure 6). Further, it has two inner ridges 20 for positioning the projection 8 of the converter assembly 7 and an engagement projection 21 fitted to a small extent in an end portion of the assembly 7 ( Figure 7).
  • the projection 8 of the converter assembly 8 is fitted in the blind hollow portion 19 of the free end portion 15 such that it is found in a space defined by the two ridges 20 and inner wall surface therebetween, while the engagement projection 21 is fitted in the end portion of the assembly 7.
  • the free end portion 15 and assembly 7 are abutted end to end, and in this state they are secured to each other by the pair of upper and lower screws 9.
  • Any load exerted to the converter 6 tends to cause the projection 8 to deform the wall of the blind hollow portion 19 so as to cause a deviation of the end 6' from the focal point.
  • the two ridges 20 have an effect of preventing the deformation of the wall of the blind hollow portion because they firmly support the projection 8.
  • the ridges 20 permit snug insertion of the projection 8 without play into the free end portion of the arm. This has an effect of improving the operation of the screw attachment.
  • the holes for passage of the screws 9, and also a drain hole 22 in the wall of the arcuate portion 13, may be formed after molding the arm from a plastic material.
  • the entire arm of the antenna according to the invention is constituted by a plastic cylindrical member. It is thus free from rusting and light in weight and can be provided at low cost. Further, in the event that the metal support pole is struck by lightning, the arm serves as an electric insulator to prevent a surge of electricity from flowing to the converter and thus protects the converter and the BS tuner against destruction.
  • a support film which is desirably a polycarbonate plastic film having a thickness of 0.2 to 0.3 mm and exhibiting high impact strength and high heat resistance.
  • a Celite primer 32 is attached to one surface 31a of the support film 31 at portions other than those on which a metal is to be deposited in a subsequent metal deposition step ( Figure 10).
  • the primer 32 is attached in the form of circular dots with a diameter of 1.25 mm or less, the dots being distributed uniformly over the surface 31a of the support film 31.
  • the primer may be attached in a pattern of lines which may, for instance, be a lattice pattern of vertical and horizontal lines or oblique lines. The primer can be attached accurately using a printing technique.
  • the surface 31a of the support film 31 is entirely covered with a metal layer 33 formed by depositing aluminum or like metal as a reflector ( Figure 11). Then, the resultant support film is washed with water to remove the primer 32 together with the portions of the metal layer deposited thereon, thus leaving the metal layer 33 deposited directly on the surface 31a ( Figure 12).
  • the surface 31a provided with the deposited metal layer 33 is laminated with an outer film 34 of synthetic resin using heat rollers, thus obtaining a sheet-like reflector section 35 having a sandwich structure ( Figure 13).
  • the outer film 34 is a polycarbonate plastic film with a thickness of 0.2 to 0.3 mm.
  • the support film 31 is transparent, and the surface of the outer film 34 may be provided in advance with a color print of the trade name of the manufacturer or the like.
  • the sheet-like reflector section 35 is then cut to a size appropriate for the size of the parabolic antenna being fabricated.
  • the cut reflector section 35 thus obtained is inserted between a pair of upper and lower dies 41 and 42 for molding a reflector body.
  • the reflector body 43 is obtained by injecting synthetic resin into the dies to mold an antenna base 36 that is integral with the inserted sheet-like reflector section 35.
  • the sheet-like reflector section 35 is inserted such that the outer film 34 thereof faces the convex portion 42' of the lower die 42 complementary to the concave surface of the reflector body ( Figure 14), and the antenna base 36 is made integral with the other surface 31b of the support film 31.
  • the antenna base 36 is molded from polycarbonate plastic. Core press molding is adopted to provide air pockets 37 in the antenna base at suitable sites thereof ( Figure 9). In this way, a paraboloid free from sink marks or warpage can be obtained.
  • the edge of the antenna base may be provided with an integral raised portion 38 to reinforce the reflector body 43.
  • Figures 15 to 19 show a second embodiment of the reflector body 43 of a parabolic antenna obtained by the method according to the invention, which is a slight modification of the first embodiment.
  • a Celite primer is attached to one surface 31a of a support film 31 at portions other than those on which a metal is to be deposited in a subsequent metal deposition step ( Figure 16).
  • the surface 31a of the support film 31 is entirely covered with a metal layer 33 formed by depositing aluminum or like metal as a reflector ( Figure 17), and then the resultant support film is washed with water to remove the primer 32 together with the portions of the metal layer deposited thereon, thus leaving the metal layer 33 deposited directly on the surface 31a. In this way, a sheet-like reflector section 35 is formed ( Figure 18).
  • the support film 31 may be transparent, or it may be colored, and its other surface 31b may be provided in advance with a color print of the trade name of the manufacturer or the like.
  • the sheet-like reflector section 35 is then cut to a size appropriate for the size of the parabolic antenna to be fabricated.
  • the cut reflector section 35 is then inserted between a pair of upper and lower dies 41 and 42 for molding a reflector body.
  • the reflector body 43 is obtained by injecting synthetic resin into the dies to mold an antenna base 36 that is integral with the inserted sheet-like reflector section 35.
  • the sheet-like reflector section 35 is inserted such that the other surface 31b of the support film 31 faces the convex portion 42' of the lower die 42 complementary to the concave surface of the reflector ( Figure 19), and the remaining portions of the support film provided with the deposited metal layer 33 is brought into contact with the synthetic resin injected onto the side of the surface 31a of the support film.
  • the antenna base 36 is molded from a synthetic resin thermally fusible to the support film 31, for instance the same type of polycarbonate plastic as that of the support film.
  • the portions 33' of the surface 31a of the support film 31 which are exposed by the removal of the primer and deposited metal layer are directly thermally fused to and made integral with the antenna base 36 while the remaining deposited metal layer 33 left attached to the surface 31a is surrounded by the integral antenna base portions.
  • the antenna base is desirably molded by gas-assisted injection molding wherein the resin is pressed with a low pressure against the surface 31a of the support film 31 while the resin is injected.
  • the edge of the antenna base may be provided with an integral raised portion 38 to reinforce the reflector body 43.
  • Figures 20 to 24 show a third embodiment of the reflector body of a parabolic antenna obtained by the method according to the invention.
  • a metal net 39 is mounted as a reflector on one surface 31a of a support film 31.
  • the metal net 39 is mounted by suitable means such as bonding or fusing. It is made of brass, and its mesh size is about #100.
  • the surface 31a provided with the metal net 39 is laminated with an outer film 34 using heat rollers, thus obtaining a sheet-like reflector section 35 having a sandwich structure.
  • the outer film 34 is desirably made of polycarbonate plastic and has a thickness of 0.2 to 0.3 mm.
  • the sheet-like reflector section 35 is cut to a size appropriate for the size of the parabolic antenna to be fabricated.
  • the cut reflector section 35 is then inserted between a pair of upper and lower dies 41 and 42 for molding the reflector body.
  • the reflector body 43 is obtained by injecting a synthetic resin into the dies to mold an antenna base 36 that is integral with the inserted sheet-like reflector section 35.
  • the reflector section 35 is inserted such that the outer film 34 thereof faces the convex portion 42' of the lower die 42 complementary to the concave surface of the reflector body ( Figure 24), and the antenna base 36 is made integral with the other surface 31b of the support film 31.
  • the antenna base 36 is molded from polycarbonate plastic. Core press molding is adopted to provide air pockets 37 in the antenna base at suitable sites thereof. In this way, a paraboloid free from sink marks or warpage can be obtained.
  • the edge of the antenna base may be provided with an integral raised portion 38 to reinforce the reflector body 43.
  • Figures 25 to 28 show a fourth embodiment of the reflector body of a parabolic antenna obtained by the method according to the invention.
  • a plurality of closely spaced metal film layer portions 32 are provided as a reflector on one surface 31a of a support film 31 by sputtering using a mask ( Figure 27).
  • the support film 31 is desirably molded from polycarbonate plastic, has high impact strength and large heat resistance and is of a thickness of about 0.5 mm.
  • a plurality of concentric annular metal film layer portions 32 are provided on the support film 31. The distance between adjacent annular metal film portions 32 is set to 1.25 mm or less.
  • the sheet-like reflector section 35 thus produced is then cut into a size appropriate for the size of the parabolic antenna to be fabricated.
  • the cut reflector section 35 is then inserted between a pair of upper and lower dies 41 and 42 for molding the reflector body.
  • the reflector body is obtained by injecting a synthetic resin into the dies to mold an antenna base 36 that is integral with the inserted sheet-like reflector section 35.
  • the sheet-like reflector section 35 is inserted such that the support film 31 thereof faces the convex portion 42' of the lower dies 42 complementary to the concave surface of the reflector body ( Figure 28), and the antenna base 36 is made integral with the surface 31a of the support film 31 that is provided with the metal film layer portions 32.
  • the antenna base 36 is molded from polycarbonate plastic. Core press molding is adopted to provide air pockets 37 in the antenna base at suitable sites thereof. In this way, a paraboloid free from sink marks or warpage can be obtained.
  • the edge of the antenna base may be provided with an integral raised portion 38 to reinforce the reflector body 43.
  • Figures 29 to 33 show a fifth embodiment of the reflector body for a parabolic antenna obtained by the method according to the invention.
  • a metal layer 33 is deposited on one surface of a support film 31.
  • the support film 31 is of polycarbonate plastic and has a thickness of about 0.25 mm
  • the deposited metal layer 33 is of aluminum and has a thickness of 1,500 angstroms.
  • the support film 31 and the metal layer 33 are press-stamped to form small holes 40 over their entire area.
  • the holes 40 may be circular with a diameter of 1.25 mm ( Figure 31), may be slits having a width of 1.25 mm or less or may be square with each side measuring 1.25 mm.
  • the outer film 34 is of polycarbonate plastic and has a thickness of about 0.3 mm.
  • the sheet-like reflector section 35 is then cut into a size appropriate for the size of the parabolic antenna to be fabricated.
  • the cut reflector section 35 is then inserted between a pair of upper and lower dies 41 and 42 for molding the reflector body.
  • the reflector body is obtained by injecting a synthetic resin into the dies to mold an antenna base 36 that is integral with the inserted sheet-like reflector section.
  • the sheet-like reflector section 35 is inserted such that the outer film 34 thereof faces the convex portion 42' of the lower die 42 complementary to the concave surface of the reflector body ( Figure 33), and the antenna base 36 is made integral with the surface of the support film 31 provided with the deposited metal layer 33.
  • the antenna base 36 is molded from polycarbonate plastic. Core press molding is adopted to provide air pockets 37 in the antenna base at suitable sites thereof. In this way, a paraboloid free from sink marks or warpage can be obtained.
  • the edge of the antenna base may be provided with an integral raised portion 38 to reinforce the reflector body 43.
  • the method of manufacturing the reflector body of a parabolic antenna according to the invention unlike the prior art method of fabricating a reflector with small holes from a thin metal plate, a sheet-like reflector section is produced.
  • the method requires only a single pair of upper and lower dies for molding the reflector body and thus permits reduction of the cost of equipment and processing.
  • the support film, outer film and antenna base constituting the reflector section are all of the same synthetic resin material. Thus, very strong fusion can be obtained, and there is no possibility of detachment even with small bonding area.
EP19920310635 1991-11-21 1992-11-20 Parabolic antenna and method of manufacturing reflector body of the same Withdrawn EP0543664A3 (en)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP331596/91 1991-11-21
JP3331598A JPH0750520A (ja) 1991-11-21 1991-11-21 パラボラアンテナ用反射鏡体の製造方法
JP331598/91 1991-11-21
JP33159791A JPH0750519A (ja) 1991-11-21 1991-11-21 パラボラアンテナ用反射鏡体の製造方法
JP331597/91 1991-11-21
JP33159691A JPH0746029A (ja) 1991-11-21 1991-11-21 パラボラアンテナ用反射鏡体の製造方法
JP338040/91 1991-11-28
JP33804091A JPH0697726A (ja) 1991-11-28 1991-11-28 パラボラアンテナ用反射鏡体の製造方法
JP4758292A JPH06132722A (ja) 1992-02-04 1992-02-04 パラボラアンテナ用アーム
JP47582/92 1992-02-04
JP232684/92 1992-08-10
JP23268492A JPH0661731A (ja) 1992-08-10 1992-08-10 パラボラアンテナ用反射鏡体の製造方法

Publications (2)

Publication Number Publication Date
EP0543664A2 true EP0543664A2 (de) 1993-05-26
EP0543664A3 EP0543664A3 (en) 1993-09-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920310635 Withdrawn EP0543664A3 (en) 1991-11-21 1992-11-20 Parabolic antenna and method of manufacturing reflector body of the same

Country Status (1)

Country Link
EP (1) EP0543664A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060658A1 (en) * 1998-05-15 1999-11-25 Cambridge Industries Limited Low noise block (lnb) mounting system
EP2223789A3 (de) * 2009-02-10 2010-10-27 Cheil Industries Inc. Spritzguss-RF-Antenne, Vorrichtung damit und zugehörige Verfahren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58161404A (ja) * 1982-03-18 1983-09-26 Dx Antenna Co Ltd 反射鏡形アンテナの製造方法
JPS60235503A (ja) * 1984-05-08 1985-11-22 Showa Denko Kk 円偏波アンテナ用反射板
JPS614304A (ja) * 1984-06-19 1986-01-10 Bridgestone Corp 電磁波反射体の製造方法
DE3822963A1 (de) * 1987-07-06 1989-01-19 Toshiba Kawasaki Kk Mikrowellen-empfangsvorrichtung
DE9001820U1 (de) * 1990-02-03 1990-04-19 Hagenbusch, Guenther, 7313 Reichenbach, De
DE9002641U1 (de) * 1990-03-07 1990-05-10 Schloesser, Bernhard, 7608 Willstaett, De

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1546645A (en) * 1976-05-11 1979-05-31 Mullard Ltd Method of producing electro-magnetic radiation reflectors by moulding
GB2120854A (en) * 1982-04-16 1983-12-07 Fastwool Limited Antennas
CA1177575A (en) * 1982-04-30 1984-11-06 John Thomas Dished reflector and method of making dished reflector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58161404A (ja) * 1982-03-18 1983-09-26 Dx Antenna Co Ltd 反射鏡形アンテナの製造方法
JPS60235503A (ja) * 1984-05-08 1985-11-22 Showa Denko Kk 円偏波アンテナ用反射板
JPS614304A (ja) * 1984-06-19 1986-01-10 Bridgestone Corp 電磁波反射体の製造方法
DE3822963A1 (de) * 1987-07-06 1989-01-19 Toshiba Kawasaki Kk Mikrowellen-empfangsvorrichtung
DE9001820U1 (de) * 1990-02-03 1990-04-19 Hagenbusch, Guenther, 7313 Reichenbach, De
DE9002641U1 (de) * 1990-03-07 1990-05-10 Schloesser, Bernhard, 7608 Willstaett, De

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
AP-S INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION;June 15-19,1987,Blacksburg US;IEEE,New York,US,1987 R.D. GRAGLIA et al.:"Effects of dielectric support struts on the radiation pattern of reflector antennas" pages 752-755 *
ELECTRONICS LETTERS vol. 24, no. 6, 17 March 1988, STEVENAGE GB pages 318 - 319 B. HUDER ET AL. 'Flat printed reflector antenna for mm-wave applications' *
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION vol. 36, no. 2, February 1988, NEW YORK US pages 182 - 190 P.-S. KILDAL ET AL. 'Losses,sidelobes, and cross polarization caused by feed-support struts in reflector antennas: design curves' *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 141 (E-406)(2198) 24 May 1986 & JP-A-61 004 304 ( BRIDGESTONE K.K. ) 10 January 1986 *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 91 (E-394)(2148) 9 April 1986 & JP-A-60 235 503 ( SHOWA DENKO K.K. ) 22 November 1985 *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 284 (E-217)(1429) 17 December 1983 & JP-A-58 161 404 ( DEIETSUKUSU ANTENA K.K. ) 26 September 1983 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060658A1 (en) * 1998-05-15 1999-11-25 Cambridge Industries Limited Low noise block (lnb) mounting system
EP2223789A3 (de) * 2009-02-10 2010-10-27 Cheil Industries Inc. Spritzguss-RF-Antenne, Vorrichtung damit und zugehörige Verfahren
US8400363B2 (en) 2009-02-10 2013-03-19 Cheil Industries, Inc. In-mold type RF antenna, device including the same, and associated methods

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Publication number Publication date
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