US3789418A - Flexible antenna formed of opposed convex laminated strips covered with a heat-shrunk hose - Google Patents

Flexible antenna formed of opposed convex laminated strips covered with a heat-shrunk hose Download PDF

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Publication number
US3789418A
US3789418A US00300621A US3789418DA US3789418A US 3789418 A US3789418 A US 3789418A US 00300621 A US00300621 A US 00300621A US 3789418D A US3789418D A US 3789418DA US 3789418 A US3789418 A US 3789418A
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US
United States
Prior art keywords
steel strips
antenna
groups
strips
pair
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
US00300621A
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English (en)
Inventor
H Reiber
R Stapelfeldt
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.)
Alcatel Lucent NV
Original Assignee
International Standard Electric Corp
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 DE19712154651 external-priority patent/DE2154651C3/de
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3789418A publication Critical patent/US3789418A/en
Assigned to ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS reassignment ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/084—Pivotable antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/085—Flexible aerials; Whip aerials with a resilient base
    • 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
    • H01Q1/20—Resilient mountings

Definitions

  • ABSTRACT This invention relates to a laminated antenna for portable radio sets which can be bent or buckled.
  • the antenna lamination consists of two longitudinally staggered groups of transversely cambered steel strips. These strip groups are so disposed in a mirror-inverted arrangement that a biconvex cross section is obtained.
  • Firmly interconnected only at the base of the antenna through a holder, the entire arrangement is covered with a heat-shrunk hose.
  • the biconvex arrangement of the steel strips results in a rigidity equal in both directions of bending.
  • the covering provides protection against atmospheric influences, contamination and injuries and prevents reflections of light.
  • portable radio sets particularly radiotelephones
  • use telescopic antennas which are telescoped when required, thus permitting easy handling and stowage of the non-operational sets.
  • laminated antennas consist of a lamination of several socalled hollow steel strips (steel strips cambered transversely to the longitudinal direction) of different length. Staggered in length from the inside toward the outside, the steel strips are firmly interconnected at the base via a holder, the latter simultaneously representing a plug-and-socket and/or screw connection, so that the antenna can be electrically and mechanically connected with the associated set.
  • the interleaved steel strips are provided at certain intervals with matching oblong holes. Sliding therein are rivets, which hold the hollow steel strips together.
  • the antenna On its outside, the antenna is provided with a coat of paint as a protection against corrosion and reflection.
  • This type of antenna is that it is self-erecting, highly flexible, and capable of being bent and buckled without being damaged. If it is out of operation, it can be folded together and stowed away in a special antenna compartment of the carrying case for the radio set.
  • the known design just described has the disadvantage of showing a varying mechanical behavior in the two directions of buckling due to the unidirectional position of the individual hollow steel strips.
  • contamination may be caused by the penetration of foreign matter and moisture between the laminated strips, which may result in mechanical damage and corrosion and, consequently, in a deterioration of the antennas electrical characteristics.
  • the coat of paint may suffer, and visible bright spots may emerge. Also, injuries cannot be excluded due to the sharp metallic edges.
  • the invention is characterized in that the antenna lamination consists of two longitudinally staggered groups of hollow steel strips, that said two groups are so disposed in a mirror-inverted arrangement that a biconvex cross section is obtained, that the two strip groups are interconnected only at the base via the holder, and that the arrangement consisting of the steel strips and the holder is provided with a close-fitting, hose-like covering.
  • the principal advantage achieved by the invention is that the biconvex arrangement of two groups of steel strip makes the mechanical properties equal in both directions of buckling, thereby stabilizing the antenna in its mechanical behavior.
  • the hose-like covering By the hose-like covering, the hollow steel strips are held together.
  • this covering insures perfect protection against contamination and corrosion, shows no bright, reflection-prone spots even if there is a certain abrasion, and simultaneously excludes the possibility of a person cutting himself.
  • FIG. 1 is a side view of the laminated antenna in accordance with the invention.
  • FIG. 2 is a front view of the antenna of FIG. 1;
  • FIG. 3 shows the antenna of FIG. 1 in a section along line I-I and on an enlarged scale
  • FIG. 4 shows the antenna of FIG. 1 in a section along line II-II and on an enlarged scale.
  • FIGS. 1 and 2 show the shape of a laminated antenna in accordance with the invention.
  • the entire antenna lamination which essentially consists of layers of hollow steel strips 3 (FIG. 3) of different length, is covered with a heat-shrunk hose 5.
  • this protective covering extends beyond a holder 1 (FIG. 3) holding the steel strips together, the outlines of which are shown in FIG. 2.
  • This holder is provided with a knurled cap nut 1b for screwing the plugged-in aerial together with the associated radio set.
  • the free end of the antenna lamination is designed as an elastic tongue 5b. It consists of the heat-shrunk hose 5, which rises above the longest hollow steel strips by a few centimeters and, as shown in FIG. 2, is welded or glued together to form a flat tongue. This elastic extension especially prevents eye injuries.
  • FIG. 3 shows the structure of a laminated antenna in accordance with the invention.
  • the base of the antenna is formed by the holder 1, which is provided with a brace 1a for fastening the hollow steel strips 3, divided into two groups.
  • the individual steel strips are slightly cambered transversely to the longitudinal direction.
  • Each of the two groups of strips consist of a number of steel strips of different length, with the longitudinal stagger directed from the inside towards the outside and the equally arranged strip sections of the two groups staggered in the longitudinal direction, too. Only the respective outer hollow steel strips 3a are equally long.
  • the thus staggered strip groups are disposed in a mirror-inverted arrangement as shown in FIG. 4, so that a biconvex cross section is obtained.
  • the strip groups are firmly interconnected by means of rivets 2.
  • the outer, or equally long additional, hollow strips 3a may be loosely added.
  • the free end of the laminated antenna, essentially consisting of the outer hollow steel strips 3a, is provided with a plastic or metallic protective cap 4, which holds the two strip groups together and, above all, prevents the protective covering from being pierced by the strip ends.
  • a heat-shrunk hose 5 As an essential structural element, this heat-shrunk hose holds the laminated hollow steel strips together along the entire length of the antenna, causes a mutual support of the individual strips and protects the latter against contamination, corrosion and damage.
  • the inside of the covering is provided with a lubricant such as talcum powder.
  • a lubricant such as talcum powder.
  • the hose 5 has edge reinforcements 5a in order that injuries and/or piercing of the particularly stressed longitudinal edges are/is avoided.
  • the heat-shrunk hose 5 rises a few centimeters above the free end of the hollow steel strips 3a and, as already mentioned, is welded or glued together to form an elastic tongue 5b.
  • the hue of the heat-shrunk hose 5 is chiefly dark and the surface is dull, so that the possibility of light reflections is excluded.
  • the laminated antenna according to claim 1 wherein the covering is a heat-shrunk hose reinforced at the longitudinal edges and which rises above the free end of the outer steel strips, and which is fixedly joined together to form an elastic tongue.
  • a self-erecting antenna comprising a pair of longitudinally staggered groups of hollow strips arranged to have a biconvex cross-section and means for interconnecting said strips at least at one end and enclosing said strips within a continuous sheath.
  • said means includes a holder interconnecting said groups at the base of the antenna only.
  • a self-erecting laminated antenna capable of being twisted or flexed in any direction from the normal comprising an antenna lamination arrangement including a pair of longitudinally staggered groups of hollow strips disposed in mirror-inverted arrangement to provide a biconvex cross-section, said pair of groups being interconnected at one end and arranged to be enclosed in a nonconductive continuous sheath.

Landscapes

  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
US00300621A 1971-11-03 1972-10-25 Flexible antenna formed of opposed convex laminated strips covered with a heat-shrunk hose Expired - Lifetime US3789418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712154651 DE2154651C3 (de) 1971-11-03 Bieg- und knickbare Blattantenne fur tragbare Funkgeräte oder dergleichen

Publications (1)

Publication Number Publication Date
US3789418A true US3789418A (en) 1974-01-29

Family

ID=5824098

Family Applications (1)

Application Number Title Priority Date Filing Date
US00300621A Expired - Lifetime US3789418A (en) 1971-11-03 1972-10-25 Flexible antenna formed of opposed convex laminated strips covered with a heat-shrunk hose

Country Status (14)

Country Link
US (1) US3789418A (xx)
JP (1) JPS5220112B2 (xx)
AR (1) AR195392A1 (xx)
AU (1) AU473917B2 (xx)
BR (1) BR7207661D0 (xx)
CA (1) CA968037A (xx)
CH (1) CH547015A (xx)
DK (1) DK136562C (xx)
ES (1) ES408192A1 (xx)
FR (1) FR2158492B1 (xx)
IT (1) IT969976B (xx)
NL (1) NL7214686A (xx)
NO (1) NO137924C (xx)
SE (1) SE375192B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611213A (en) * 1984-06-08 1986-09-09 Amp Incorporated Coaxial connector for antenna
US4867698A (en) * 1988-02-03 1989-09-19 Amp Incorporated Antenna Connector
US5252984A (en) * 1989-07-05 1993-10-12 Robert Bosch Gmbh Multiband coaxial rod and sleeve antenna
US5448256A (en) * 1994-07-15 1995-09-05 Uniden America Corporation Antenna
US6052097A (en) * 1998-03-04 2000-04-18 Tri-Tronics, Inc. Antenna circuit and method for collar-mounted remote animal training system
US6061037A (en) * 1998-03-04 2000-05-09 Tri-Tronics, Inc. Flex antenna structure and method for collar-mounted remote animal training system
USD891403S1 (en) * 2019-01-23 2020-07-28 Pulse Finland Oy Tri band whip omnidirectional antenna

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5818330Y2 (ja) * 1978-10-30 1983-04-14 沖電気工業株式会社 ホイツプアンテナ
FR2518825A1 (fr) * 1981-12-18 1983-06-24 Thomson Csf Antenne courte pour emetteur-recepteur d'ondes electromagnetiques portable
JPH03110901A (ja) * 1989-09-26 1991-05-10 Mitsubishi Electric Corp アンテナ装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293429A (en) * 1940-02-09 1942-08-18 Telefunken Gmbh Short-wave aerial
GB660913A (en) * 1949-03-29 1951-11-14 Gen Electric Co Ltd Improvements in or relating to aerials for portable radio apparatus
DE847302C (de) * 1950-11-16 1952-08-21 Siemens Ag Biegsame Stabantenne
CA526629A (en) * 1956-06-19 Ultra Electric Limited Collapsible aerials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736290C (de) * 1938-08-11 1943-06-11 Telefunken Gmbh Freitragende, zusammenlegbare Linearantenne aus elastischem selbststreckendem Metallband
GB692987A (en) * 1952-03-27 1953-06-17 Ultra Electric Ltd Improvements in and relating to collapsible aerials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA526629A (en) * 1956-06-19 Ultra Electric Limited Collapsible aerials
US2293429A (en) * 1940-02-09 1942-08-18 Telefunken Gmbh Short-wave aerial
GB660913A (en) * 1949-03-29 1951-11-14 Gen Electric Co Ltd Improvements in or relating to aerials for portable radio apparatus
DE847302C (de) * 1950-11-16 1952-08-21 Siemens Ag Biegsame Stabantenne

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611213A (en) * 1984-06-08 1986-09-09 Amp Incorporated Coaxial connector for antenna
US4867698A (en) * 1988-02-03 1989-09-19 Amp Incorporated Antenna Connector
US5252984A (en) * 1989-07-05 1993-10-12 Robert Bosch Gmbh Multiband coaxial rod and sleeve antenna
US5448256A (en) * 1994-07-15 1995-09-05 Uniden America Corporation Antenna
US6052097A (en) * 1998-03-04 2000-04-18 Tri-Tronics, Inc. Antenna circuit and method for collar-mounted remote animal training system
US6061037A (en) * 1998-03-04 2000-05-09 Tri-Tronics, Inc. Flex antenna structure and method for collar-mounted remote animal training system
USD891403S1 (en) * 2019-01-23 2020-07-28 Pulse Finland Oy Tri band whip omnidirectional antenna

Also Published As

Publication number Publication date
ES408192A1 (es) 1975-11-16
JPS4858747A (xx) 1973-08-17
FR2158492B1 (xx) 1977-12-30
IT969976B (it) 1974-04-10
DK136562B (da) 1977-10-24
FR2158492A1 (xx) 1973-06-15
SE375192B (xx) 1975-04-07
CA968037A (en) 1975-05-20
AU4836972A (en) 1974-05-02
NL7214686A (xx) 1973-05-07
DE2154651A1 (de) 1973-05-10
NO137924B (no) 1978-02-06
CH547015A (de) 1974-03-15
JPS5220112B2 (xx) 1977-06-01
NO137924C (no) 1978-05-24
AR195392A1 (es) 1973-10-08
DE2154651B2 (de) 1977-02-24
DK136562C (da) 1978-03-20
BR7207661D0 (pt) 1973-08-30
AU473917B2 (en) 1976-07-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023

Effective date: 19870311