US3579244A - Collapsible antenna employing flexible tape radiators - Google Patents

Collapsible antenna employing flexible tape radiators Download PDF

Info

Publication number
US3579244A
US3579244A US3579244DA US3579244A US 3579244 A US3579244 A US 3579244A US 3579244D A US3579244D A US 3579244DA US 3579244 A US3579244 A US 3579244A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
mast
elements
antenna
secured
ground plane
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
Inventor
Richard C Dempsey
Francis E Lind
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.)
ITT Corp
ITT
Original Assignee
ITT
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
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/08Means for collapsing antennas or parts thereof
    • H01Q1/085Flexible aerials; Whip aerials with a resilient base
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/08Means for collapsing antennas or parts thereof

Abstract

A plurality of radiating elements fabricated of flexible thin steel is secured to a telescoping mast. A ground plane is formed of a plurality of similar steel members which are mounted in a plane perpendicular to the mast. Within the mast are cables and auxiliary electrical equipment. The radiating elements, the ground plane elements, and the mast are completely collapsible into a compact package.

Description

United States Patent lnventors Richard C. Dempsey Chatsworth; Francis E. Lind, Granada Hills, Calif. Appl. No. 755,563 Filed Aug. 27, 1968 Patented May 18, 1971 Assignee International Telephone and Telegraph Corporation New York, N.Y.

COLLAPSIBLE ANTENNA EMPLOYING FLEXIBLE TAPE RADIATORS 5 Claims, 3 Drawing Figs.

US. Cl 343/797, 343/846, 343/890, 343/915 Int. Cl ..H0lq 21/26,

HOlq 15/20 Field of Search 343/796, 797, 846, 877, 908, 890, 915

[56] References Cited UNITED STATES PATENTS 2,565,661 8/1951 Lidz 343/821 2,800,658 7/ 1957 Long 343/846 3,465,567 9/1969 Park 343/877 FOREIGN PATENTS 27,175 1 H1913 Great Britain 343/846 Primary Examiner-Eli Lieberman Attorneys--C. Cornell Remsen, Jr., Walter J. Baum, Paul W. Hemminger, Percy P. Lantzy and Thomas E. Kristolferson ABSTRACT: A plurality of radiating elements fabricated of flexible thi'n steel is secured to a telescoping mast. A ground plane is formed of a plurality of similar steel members which are mounted in a plane perpendicular to the mast. Within the mast are cables and auxiliary electrical equipment. The radiating elements, the ground plane elements, and the mast are completely collapsible into a compact package.

Patented May 18, 1971 3,579,244

g "g 'ic t lira. 2.

AITTO/Q/VEX COLLAIPSIIBLE ANTENNA EMPLOYING FLEXIBLE TAPE RADIATORS The invention relates in general to collapsible antenna and more particularly to an antenna for field use which may be transported in a compact size and rapidly set up.

BACKGROUND OF THE INVENTION The conventional planar tumstile antenna whose radiating elements are mounted in a horizontal plane has the advantage of transmitting and receiving signals of either right-circular polarization or left-circular polarization, together with a circular pattern symmetry about a vertical or polar axis. For horizontally polarized signals, hemispherical coverage is maintained. However, the antenna is insensitive to vertically polarized signals arriving from the horizon and as a result would have a theoretically infinite ellipticity ratio at the horizon decreasing to a relatively low value at the zenith point.

In order to overcome the attendant disadvantages of prior art antennas while simultaneously providing a compact lightweight, collapsible antenna, the antenna of the present invention provides sensitivity to vertically polarized signals as well as horizontally and circularly polarized signals over the hemisphere of coverage. Further, the antenna provides good elevation pattern coverage in a normal operational environment with a considerable reduction in the multipath propagation effects of the signal resulting in a reduction in the elevation null depth. While the elevation beamwidth of the horizontally polarized component of the signal is reduced because of modifications from conventional planar antennas, this disadvantage is more than overcome by the advantage of increased sensitivity to the vertically polarized component. Further, the resultant antenna is of lightweight, flexible design. Moreover, the antenna can be deployed and erected in a minimum time and contains a minimum number of movable parts. Diplexing and matching electronics components interconnecting the radiating elements are completely encapsulated resulting in a weatherproof package.

SUMMARY OF THE INVENTION More particularly, the invention comprises a plurality of radiating elements fabricated of flexible-thin steel secured to a telescoping mast in a manner which allows them to be easily retracted for storing purposes. When the antenna is operationally deployed, the radiating elements are positioned at an angle of 45 relative to the horizontal and vertical axis of the antenna mast. The ground plane is formed of a plurality of steel members of similar material to that of the radiating elementsand which are mounted in a plane perpendicular to the mast of the antenna. Contained within the mast are cables for connecting the radiating elements to external electronics equipment and electrical circuitry for matching the cables to the antenna. The radiating elements and ground plane elements are completely collapsible and the mast is made of tubular sections for telescoping, resulting in a compact package. The advantage of this invention, both as to its construction and mode of operation, will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 depicts a preferred embodiment of the antenna setup for transmission or reception of signals;

FIG. 2 shows the antenna of FIG. I in itsstoredposition; and

FIG. 3 depicts a cross-sectional view of the radiating elements and ground plane elements of FIG. ll.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIG. 1 there is shown a preferred embodiment of the antenna set up for transmission or reception of signals in two separate bands of frequencies. The antenna 12 is supported on a mast 14, formed of a plurality of telescoping sections 16, interconnected by collars T7, the bottom section 18 being in the fomi of a spike which can be driven into the ground. Secured to one of the sections 16 is a guy ring having a plurality of holes 24, therein to which guy wires 26 are tied at one end and secured to spikes 28 thus providing a relatively sturdy package.

Radiating elements 32 are fixed to a top member 34 at one end and extend downwardly and outwardly therefrom at an angle of 45 with the mast 14. Within the top member are normally provided an impedance matching member for matching the radiating elements 32 to the cable within the mast 14. Also a diplexer or multiplexer may be provided within the top member 34 for diplexing or multiplexing the radiating elements into separate cable connections when the antenna is to be used in more than one frequency range.

Illustrated in FIG. I are a first set of parasitic elements 36 and a second set of parasitic elements 38 which provide separate ground planes for a high band and low band of frequencies, respectively, dependent upon which frequency band the radiating elements are transmitting or receiving. Elements 36 and 38 are secured at one end to collets 39, 40 respectively, on the mast. The elements 36 and 38 may be expanded simultaneously even though one set may be in use at a time. External connections are made to the cable in the mast through a connector 42 mounted thereon, and a removable cable 44 is secured thereto for connection to a transmitteror receiver or both.

Referring now to FIG. 2, the antenna of FIG. 1 is depicted in its collapsed state. First, theelements 36 are wrapped around the collet 39 and the radiating elements 32 secured over them. These elements are then held together by a cylindrical member 46. Then, the elements 38 are wound around the collet 40 and a cylindrical member 48 which can clear the top of the device is secured around the elements. Then the mast is collapsed and fitted into a storage case. Alternatively, the elements 36 and 38 and their respective collets 39, 40 may be designed so that the elements retract into the collet upon rotation of the collet.

The radiating elements and parasitic elements are normally formed of a thin steel tape which is concave along its length, as shown in cross section in FIG. 3, similar to a flexible steel measuring tape. The tape may be coated with a protective material such as Teflon or Mylar to provide additional environmental protection. The elements may also be formed of good conducting materials other than steel, such as beryllium copper. The telescoping mast normally is made of aluminum tubing which is relatively close fitting and is locked in the extended position by a split-compression ring activated by a collar that squeezes the ring tightly around the tubing.

As can readily be seen, the antenna provides relatively good hemispherical coverage for circularly polarized as well as vertically polarized and horizontally polarized waves. Should it be desirable to enhance antenna response to the vertically polarized signals, vertical reflecting members could be attached to the ends of the parasitic elements 36 and 38.

Further, while the parasitic elements 36 and 38 are shown as four members, it should be understood of course, that more members could be used with resultant slight variations in antenna patterns. Moreover, while four elements have been depicted as radiating elements, it should be understood that other members of elements in multiples of two and greater than four could be used, such as six or eight elements, and a satisfactory circularly polarized wave pattern could be obtained. Also, by allowing the radiating elements to extend downwardly and outwardly at a 45 angle, a satisfactory response to both the horizontally and vertically polarized components can be obtained.

While one set of radiator arms for use with two sets or parasitic elements for two separate frequency bands has been described, it should be understood that a separate set of radiator arms in combination with a separate set of parasitic elements could be used. Moreover, should one set of radiator arms be used in combination with two sets of parasitic elements and if a single transmission cable for each frequency is preferred, resonant circuit components may be located within the mast structure to allow multiple frequency operation and eliminate the need for a diplexer.

It should be further understood that the foregoing disclosure relates only to preferred embodiments of the invention, and it is intended to cover all changes and modifications of the examples of the invention herein chosen for the purpose of the disclosure which do not constitute departures from the spirit and scope of the invention.

We claim:

1. A collapsible antenna for mounting on a mast comprising: a plurality of radiating elements formed of a flexible material secured to said mast, said radiating elements being secured at one end to said mast and extending downwardly and outwardly therefrom a predetermined angle when operational; and a plurality of elements forming a ground plane formed of flexible material and secured to said mast at one end, said ground plane elements extending outwardly in a plane perpen- I dicular to said mast when said antenna is operational, said flexible material comprising conductive tape which collapses to a closed position from an open position when said antenna is not in use.

2. A collapsible antenna in accordance with claim 1 wherein said predetermined angle is 45, said antenna being designed to transmit and receive circularly polarized waves.

3. A collapsible antenna in accordance with claim 1 wherein said radiating elements and said ground plane elements are made of thin flexible steel.

4. A collapsible antenna in accordance with claim 1 wherein said radiating elements and said ground plane elements are of concave shape along their length.

5. A collapsible antenna in accordance with claim 1 wherein said radiating elements are secured to said mast in planes parallel to said mast when stored and said ground plane elements are secured in overlapping arrangement when stored.

Claims (5)

1. A collapsible antenna for mounting on a mast comprising: a plurality of radiating elements formed of a flexible material secured to said mast, said radiating elements being secured at one end to said mast and extending downwardly and outwardly therefrom a predetermined angle when operational; and a plurality of elements forming a ground plane formed of flexible material and secured to said mast at one end, said ground plane elements extending outwardly in a plane perpendicular to said mast when said antenna is operational, said flexible material comprising conductive tape which collapses to a closed position from an open position when said antenna is not in use.
2. A collapsible antenna in accordance with claim 1 wherein said predetermined angle is 45*, said antenna being designed to transmit and receive circularly polarized waves.
3. A collapsible antenna in accordance with claim 1 wherein said radiating elements and said ground plane elements are made of thin flexible steel.
4. A collapsible antenna in accordance with claim 1 wherein said radiating elements and said ground plane elements are of concave shape along their length.
5. A collapsible antenna in accordance with claim 1 wherein said radiating elements are secured to said mast in planes parallel to said mast when stored and said ground plane elements are secured in overlapping arrangement when stored.
US3579244A 1968-08-27 1968-08-27 Collapsible antenna employing flexible tape radiators Expired - Lifetime US3579244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US75556368 true 1968-08-27 1968-08-27

Publications (1)

Publication Number Publication Date
US3579244A true US3579244A (en) 1971-05-18

Family

ID=25039676

Family Applications (1)

Application Number Title Priority Date Filing Date
US3579244A Expired - Lifetime US3579244A (en) 1968-08-27 1968-08-27 Collapsible antenna employing flexible tape radiators

Country Status (2)

Country Link
US (1) US3579244A (en)
DE (1) DE1942844A1 (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725943A (en) * 1970-10-12 1973-04-03 Itt Turnstile antenna
US3739390A (en) * 1970-12-14 1973-06-12 Beukers Labor Inc Duplexed antenna for retransmission devices
US3742510A (en) * 1971-01-12 1973-06-26 Itt Multimode discone antenna
US3771162A (en) * 1971-05-14 1973-11-06 Andrew California Corp Omnidirectional antenna
EP0194749A2 (en) * 1985-02-12 1986-09-17 Plessey Overseas Limited Collapsible antenna assembly
FR2649250A1 (en) * 1989-06-28 1991-01-04 Gen Electric Span of deployable antenna
US5196858A (en) * 1990-12-20 1993-03-23 General Electric Co. Deployable S-shaped antenna element
US5446468A (en) * 1994-03-23 1995-08-29 The United States Of America As Represented By The Secretary Of The Navy Launcher tube deployed marker beacon including settlement atop foliage feature
US5515067A (en) * 1992-03-24 1996-05-07 Agence Spatiale Europenne Self-supporting shell for use in space
US5608416A (en) * 1993-04-21 1997-03-04 The Johns Hopkins University Portable rapidly erectable discone antenna
US5872548A (en) * 1997-02-04 1999-02-16 Gec-Marconi Hazeltine Corporation Electronic Systems Division Space/angle diversity configurations for cellular antennas
US6018325A (en) * 1997-10-14 2000-01-25 At&T Corp Monopole antenna mounting system
US6038736A (en) * 1998-06-29 2000-03-21 Lockheed Martin Corporation Hinge for deployable truss
US6062527A (en) * 1998-06-29 2000-05-16 Lockheed Martin Corporation Flexurally hinged tripod support boom
US6328273B1 (en) * 2000-02-14 2001-12-11 Christopher C. Kemikem Ground-engaging pole mount for supporting a device
US6480168B1 (en) 2000-09-19 2002-11-12 Lockheed Martin Corporation Compact multi-band direction-finding antenna system
US20030206140A1 (en) * 2002-05-06 2003-11-06 Thornberg D. Bryce Integrated multipath limiting ground based antenna
US20040233120A1 (en) * 2003-05-23 2004-11-25 Ryan Ralph E. Temporary cellular antenna site
GB2413013A (en) * 2004-04-08 2005-10-12 Florenio Pinili Regala Co-located folding Vertical monopole antenna and circular polarised satellite antenna for man-pack use
US20090267865A1 (en) * 2008-04-23 2009-10-29 R.A. Miller Industries, Inc. Field Antenna
FR2954601A1 (en) * 2009-12-23 2011-06-24 Thales Sa Foldable radio electric antenna for use in goniometry system at e.g. ground, has rods integrated to lower end of intermediate section, where free end of rods is integrated to free ends of respective arms to carry deployment of antenna
US8055209B1 (en) 2009-07-20 2011-11-08 Muos Labs Multi-band portable SATCOM antenna with integral diplexer
US20130069833A1 (en) * 2011-09-21 2013-03-21 Wendy Louise Lippincott Small deployable uhf circularly-polarized crossed dipole antenna
GB2512167A (en) * 2012-12-24 2014-09-24 Selex Es Ltd An improved portable antenna

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191327175A (en) * 1913-11-25 1914-04-16 William John Mellersh-Jackson Improvements in or relating to Radio-telegraph Stations.
US2565661A (en) * 1949-03-14 1951-08-28 Tele Tone Radio Corp Radio antenna system
US2800658A (en) * 1955-12-08 1957-07-23 James H Long Triple-tilt antenna
US3465567A (en) * 1966-12-30 1969-09-09 Nasa Method of making tubes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191327175A (en) * 1913-11-25 1914-04-16 William John Mellersh-Jackson Improvements in or relating to Radio-telegraph Stations.
US2565661A (en) * 1949-03-14 1951-08-28 Tele Tone Radio Corp Radio antenna system
US2800658A (en) * 1955-12-08 1957-07-23 James H Long Triple-tilt antenna
US3465567A (en) * 1966-12-30 1969-09-09 Nasa Method of making tubes

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725943A (en) * 1970-10-12 1973-04-03 Itt Turnstile antenna
US3739390A (en) * 1970-12-14 1973-06-12 Beukers Labor Inc Duplexed antenna for retransmission devices
US3742510A (en) * 1971-01-12 1973-06-26 Itt Multimode discone antenna
US3771162A (en) * 1971-05-14 1973-11-06 Andrew California Corp Omnidirectional antenna
EP0194749A2 (en) * 1985-02-12 1986-09-17 Plessey Overseas Limited Collapsible antenna assembly
EP0194749A3 (en) * 1985-02-12 1988-08-03 Plessey Overseas Limited Collapsible antenna assembly
FR2649250A1 (en) * 1989-06-28 1991-01-04 Gen Electric Span of deployable antenna
US5196858A (en) * 1990-12-20 1993-03-23 General Electric Co. Deployable S-shaped antenna element
US5515067A (en) * 1992-03-24 1996-05-07 Agence Spatiale Europenne Self-supporting shell for use in space
US5608416A (en) * 1993-04-21 1997-03-04 The Johns Hopkins University Portable rapidly erectable discone antenna
US5446468A (en) * 1994-03-23 1995-08-29 The United States Of America As Represented By The Secretary Of The Navy Launcher tube deployed marker beacon including settlement atop foliage feature
US5872548A (en) * 1997-02-04 1999-02-16 Gec-Marconi Hazeltine Corporation Electronic Systems Division Space/angle diversity configurations for cellular antennas
US6018325A (en) * 1997-10-14 2000-01-25 At&T Corp Monopole antenna mounting system
US6038736A (en) * 1998-06-29 2000-03-21 Lockheed Martin Corporation Hinge for deployable truss
US6062527A (en) * 1998-06-29 2000-05-16 Lockheed Martin Corporation Flexurally hinged tripod support boom
US6328273B1 (en) * 2000-02-14 2001-12-11 Christopher C. Kemikem Ground-engaging pole mount for supporting a device
US6480168B1 (en) 2000-09-19 2002-11-12 Lockheed Martin Corporation Compact multi-band direction-finding antenna system
US7068233B2 (en) * 2002-05-06 2006-06-27 Db Systems, Inc. Integrated multipath limiting ground based antenna
US20030206140A1 (en) * 2002-05-06 2003-11-06 Thornberg D. Bryce Integrated multipath limiting ground based antenna
US20040233120A1 (en) * 2003-05-23 2004-11-25 Ryan Ralph E. Temporary cellular antenna site
US7098864B2 (en) * 2003-05-23 2006-08-29 Creative Design And Machining, Inc. Temporary cellular antenna site
US20050237256A1 (en) * 2004-04-08 2005-10-27 Florenio Regala Portable co-located LOS and SATCOM antenna
US7019708B2 (en) 2004-04-08 2006-03-28 Florenio Pinili Regala Portable co-located LOS and SATCOM antenna
GB2413013B (en) * 2004-04-08 2008-05-14 Florenio Pinili Regala Portable co-located LOS and SATCOM antenna
GB2413013A (en) * 2004-04-08 2005-10-12 Florenio Pinili Regala Co-located folding Vertical monopole antenna and circular polarised satellite antenna for man-pack use
US20090267865A1 (en) * 2008-04-23 2009-10-29 R.A. Miller Industries, Inc. Field Antenna
US8055209B1 (en) 2009-07-20 2011-11-08 Muos Labs Multi-band portable SATCOM antenna with integral diplexer
FR2954601A1 (en) * 2009-12-23 2011-06-24 Thales Sa Foldable radio electric antenna for use in goniometry system at e.g. ground, has rods integrated to lower end of intermediate section, where free end of rods is integrated to free ends of respective arms to carry deployment of antenna
US20130069833A1 (en) * 2011-09-21 2013-03-21 Wendy Louise Lippincott Small deployable uhf circularly-polarized crossed dipole antenna
GB2512167A (en) * 2012-12-24 2014-09-24 Selex Es Ltd An improved portable antenna
US9515374B2 (en) 2012-12-24 2016-12-06 Leonardo Mw Ltd Collapsible portable antenna
GB2512167B (en) * 2012-12-24 2017-02-15 Leonardo Mw Ltd An improved portable antenna
US9634382B2 (en) 2012-12-24 2017-04-25 Leonardo Mw Ltd. Portable antenna
US9711844B2 (en) 2012-12-24 2017-07-18 Leonardo Mw Ltd Portable antenna

Also Published As

Publication number Publication date Type
DE1942844A1 (en) 1970-03-05 application

Similar Documents

Publication Publication Date Title
US3369243A (en) Log-periodic antenna structure
US3599220A (en) Conical spiral loop antenna
US5255005A (en) Dual layer resonant quadrifilar helix antenna
US5781158A (en) Electric/magnetic microstrip antenna
US6359596B1 (en) Integrated circuit mm-wave antenna structure
US3110030A (en) Cone mounted logarithmic dipole array antenna
US4864320A (en) Monopole/L-shaped parasitic elements for circularly/elliptically polarized wave transceiving
US3725943A (en) Turnstile antenna
US5955997A (en) Microstrip-fed cylindrical slot antenna
US7123200B1 (en) Sea surface antenna
US6839032B2 (en) Protable radio terminal testing apparatus using single self-complementary antenna
US6759990B2 (en) Compact antenna with circular polarization
CA2260380C (en) The log-periodic staggered-folded-dipole antenna
US2175252A (en) Short wave antenna
US4812855A (en) Dipole antenna with parasitic elements
US5523767A (en) Wideband dual-polarized tilted dipole antenna
US3720874A (en) Dipole antenna arrangement for radio with separate speaker-microphone assembly
US6239764B1 (en) Wideband microstrip dipole antenna array and method for forming such array
US4978965A (en) Broadband dual-polarized frameless radiating element
US4318109A (en) Planar antenna with tightly wound folded sections
US6310584B1 (en) Low profile high polarization purity dual-polarized antennas
US6337666B1 (en) Planar sleeve dipole antenna
US6339405B1 (en) Dual band dipole antenna structure
US6255998B1 (en) Lemniscate antenna element
US4001834A (en) Printed wiring antenna and arrays fabricated thereof

Legal Events

Date Code Title Description
AS Assignment

Owner name: ITT CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606

Effective date: 19831122