US2838756A - Reflector antenna for microwaves - Google Patents

Reflector antenna for microwaves Download PDF

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Publication number
US2838756A
US2838756A US608741A US60874156A US2838756A US 2838756 A US2838756 A US 2838756A US 608741 A US608741 A US 608741A US 60874156 A US60874156 A US 60874156A US 2838756 A US2838756 A US 2838756A
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US
United States
Prior art keywords
rods
reflector
frame
strips
reflector antenna
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 - Lifetime
Application number
US608741A
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English (en)
Inventor
Reinhard Louis
Klauser Hans
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.)
Siemens Schweiz AG
Albiswerk Zuerich AG
Original Assignee
Siemens Albis AG
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 Siemens Albis AG filed Critical Siemens Albis AG
Application granted granted Critical
Publication of US2838756A publication Critical patent/US2838756A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C1/00—Concentration, evaporation or drying
    • A23C1/01—Drying in thin layers
    • A23C1/03—Drying in thin layers on drums or rollers
    • 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
    • H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal

Definitions

  • Our invention relates to a reflector screen antenna for microwaves whose reflector is composed of flat metal rods which are located at uniform mutual spacing in respective planes parallel to one another and parallel to the reflector axis, and which are joined with transverse tie strips and have their ends atached to a frame.
  • Antenna screen structures of this type are known in the microwave technique.
  • the reflector metal rods are joined with the transverse tie strips and with the antenna frame by means of linkage pieces each having two pivots axes perpendicular to each other, and by bracing adjacent reflector rods against each other by means of spacers.
  • Fig. 1 is a front view of the reflector antenna.
  • Fig. 2 is a longitudinal section along the line II-II in Fi 1.
  • ifig. 3 is a cross-section along the line IIIIII in Fig. 1.
  • Fig. 4 is a partial cross section along the in Fig. l on a larger scale
  • Fig. 5 is a partial longitudinal section along the line V--V in Fig. 1 shown on a larger scale.
  • the illustrated reflector antenna is provided with a rotationally symmetrical parabolic reflector composed of a multiplicity of flat metal rods 1. All metal rods 1 are uniformly spaced from each other a distance dependent upon the operating wave length and are locatedin planes which are parallel to one another and parallel to the re- 2,838,756 Patented June 10, 1958 flector axis. The rods 1 are firmly interconnected by means of struts or tie strips 2 extending transverse to the rods 1, and the respective ends of each metal rod 1 are firmly joined with a frame 3 of circular shape.
  • the means for mounting the reflector antenna on a standard or other support are not illustrated on the drawing.
  • the particular connection of the metal rods 1 with the strips 2 and the frame 3 is apparent from Figs. 4 and 5, Fig. 5 showing only one of the metal rods.
  • the metal rods 1 are joined with the strips 2 on the one hand and with the frame 3 on the other hand by respective linkages in form of flat metal pieces 4 and 5.
  • Each of these link pieces is provided with eyes at the respective ends, and the axes of the two eyes are turned relative to each other.
  • the frame 3 and the strips 2 have U-shaped channel cross section.
  • Pivot pins 6 and 7 are mounted in and between the two limbs of the U-profile of each of the parts 2, 3 and extend transverse to the longitudinal direction of these parts. Journaled upon each pivot pin is one of the linkage pieces 4 or 5 by means of the above: mentioned eye which is rolled into the end of the linkage piece.
  • the metal rods 1 are also given a U-shaped cross section as is aparent, for instance, at 1a in Fig. 4.
  • the ends of the link pieces 4 and 5 are located between, and in face-to-face engagement with, the limbs of the U-profile and are connected therewith by means of transverse bolts 8 pasing through the entire U-profile structure.
  • All flat link pieces 4 for connecting the metal rods with the strips 2 have identical shape and size; and all flat link pieces 5 for connecting the metal rods 1' with the frame 3 are likewise of identical design.
  • the construction may also be modified so that all link pieces have the same shape and size.
  • the connecting elements for securing the strips 2 to the frame 3 consist of U-shaped angle pieces 9 (Fig. 4) to which the parts 2 and 3 are fixed by means of rivets.
  • the metal rods are braced against each other by means of spacers 10.
  • the spacers 10 are located on one side of the metal rods 1 and are secured thereto together with the link pieces 4. On the opposite side, each spacer 10 loosely abuts against the adjacent metal rod 1.
  • the spacers 10 are preferably designed as tubular bodies into which a plug 11 of elastic material, for instance rubber, is inserted so as to protrude from the end of the tubular spacer.
  • the manufacture of a reflector antenna according to the invention is relatively easy and economical.
  • the metal rods 1 and the tie strips 2 have one and the same shape respectively due to the fact that the axial spacing of these parts at all junction points is the same because of the uniform length of the link pieces 4. Both parts therefore can be brought into the desired shape with the aid of a single bending jig or gauge. Drilling jigs are readily applicable for drilling the rows of holes and holding the respective parts during drilling operation in the predetermined accurate shape.
  • the linkage pieces are preferably produced by stamping. The individual parts prefabricated in this manner are then riveted together with the aid of suitable tools, thus definitely securing and rigidly bracing the metal rods in their proper origi nal shape.
  • reflector antennas for wave lengths below 10 cm., for instance 3 cm. and less can be built with reflector dimensions in the order of 1 m. Even if profiled light-metal structures are used for the individual parts of the antenna, as is favorable in certain cases for instance for rapidly movable antennas, a satisfactory rigidity and stability of shape of the reflector is readily secured.
  • Reflector antenna for microwaves comprising a reflector frame, a multiplicity of flat metal rods uniformly spaced from each other in respective pianos parallel to one another and parallel to the reflector axis, tie strips extending transversely to said rods, .each of said rods forming respective junctions with said frame and with said strips, a link piece located at-eachof said respective junctions and forming two pivots at its two ends respectively, said two pivots having mutually perpendicular pivot axes and connecting said link piece with one of said rods and with one of said frame and tie strips respectively.
  • said link pieces consisting of flat and elongated parts each having at its respective ends two eye portions forming said pivots.
  • said frame and said strip having each a U-shaped cross section, pivot pins mounted across the limbs of said .U- shaped cross section, each of said link pieces having a curved end which forms an eye, and said eye being pivotally seated upon one of said pivot pins.
  • said rods having a U-shaped cross section
  • said link pieces having an end portion located flat between the limbs of said U-shaped cross section of one of said rods and having a hole also located between said limbs to form one of said pivots, and a pivot pin mounted on said limbs and traversing said hole for pivotally joining said link piece with said rod.
  • a reflector antenna according to claim 1 compris 4 ing spacers all projecting from said respective rods in the same direction, each of said spacers being secured to one of said rods together with one of said respective link pieces and being in loose abutting engagement with the next adjacent rod.
  • a reflector antenna according to claim 1 comprising spacers all projecting from said respective rods in the same direction, each of said spacers being secured to one of said rods together with one of said respective link pieces and being in loose abutting engagement with the next adjacent rod, each of said spacers comprising damping means for suppressing disturbing vibration of said rods.
  • a reflector antena according to claim 1 comprising tubular spacers each being mounted on one of said 'espcctive rods in coaxial relation to one of the pivot axes of one of said link pieces and fastened to said rod together with said link piece, each of said spacers projecting from said rod toward an adjacent rod, and a plug of elastic material inserted into said tubular spacer and protruding therefrom into engagement with said adjacent rod.
  • Reflector antenna for microwaves comprising a reflector frame, a multiplicity of fiat metal rods uniformly spaced from each other in respective planes parallel to one another and parallel to the reflector axis, tie strips extending transversely to said rods, each of said rods forming respective junctions with said frame and with said strips, a flat and elongated link piece located at each of said respective junctions and having two pivot eyes at its two ends respectively, said pivot eyes having mutually perpendicular axes, pivot pins articulately joining said link piece with one of said rods and with one of said respective frame and strips, said frame and rods as well as said strips and link pieces consisting of light metal.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Aerials With Secondary Devices (AREA)
US608741A 1955-10-18 1956-09-10 Reflector antenna for microwaves Expired - Lifetime US2838756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH795428X 1955-10-18

Publications (1)

Publication Number Publication Date
US2838756A true US2838756A (en) 1958-06-10

Family

ID=4537267

Family Applications (1)

Application Number Title Priority Date Filing Date
US608741A Expired - Lifetime US2838756A (en) 1955-10-18 1956-09-10 Reflector antenna for microwaves

Country Status (5)

Country Link
US (1) US2838756A (xx)
CH (1) CH332680A (xx)
FR (1) FR1171334A (xx)
GB (1) GB795428A (xx)
NL (2) NL211504A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224007A (en) * 1961-01-31 1965-12-14 Clark A Mathis Wire mesh collapsible disk reflector
US4466161A (en) * 1982-09-29 1984-08-21 Martin Marietta Corporation Means and method for adjusting and connecting cords

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801946A (en) * 1983-01-26 1989-01-31 Mark Antenna Products, Inc. Grid antenna
SE0100345D0 (sv) * 2001-02-02 2001-02-02 Saab Ab Antennsystem och reflektorelement i antennsystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224007A (en) * 1961-01-31 1965-12-14 Clark A Mathis Wire mesh collapsible disk reflector
US4466161A (en) * 1982-09-29 1984-08-21 Martin Marietta Corporation Means and method for adjusting and connecting cords

Also Published As

Publication number Publication date
GB795428A (en) 1958-05-21
CH332680A (de) 1958-09-15
NL211504A (xx)
NL103018C (xx)
FR1171334A (fr) 1959-01-23

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