Connect public, paid and private patent data with Google Patents Public Datasets

Calibrated thin metal lamina antenna

Download PDF

Info

Publication number
US3025524A
US3025524A US81131159A US3025524A US 3025524 A US3025524 A US 3025524A US 81131159 A US81131159 A US 81131159A US 3025524 A US3025524 A US 3025524A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
antenna
dipole
antennas
folded
length
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
Charles H Thies
Original Assignee
Charles H Thies
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
    • H01QAERIALS
    • H01Q9/00Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant aerials
    • H01Q9/06Details
    • H01Q9/065Microstrip dipole antennas

Description

March 13, 1962 c H. THIES CALIBRATED THIN METAL LAMINA ANTENNA Filed May 6, 1959 FIG.2A

FIG]

Eu H 5 H I l G lwzu F I H I $6 @10 I 26 oiu IIQ Qxu I.

210' A m a 4 4 INVENTOR. Charles H. Thies ovIu Hll

llll

ATTORNEY 7 United States Fatent O 3,025,524 CALIBRATED THIN METAL LAMINA ANTENNA Charles H. Thies, 600 James St., Syracuse 3, N.Y. Filed May 6, 1959, Ser. No. 811,311 2 Claims. (Cl. 343823) This invention pertains to antennas and more particularly to antennas for receiving or transmitting electromagnetic radiation.

Many receivers of electro-magnetic radiation such as FM and television receivers, require antennas. At present, these receivers often are manufactured with antennas permanently enclosed in the housing of the receiver. These built-in antennas permit the users to install the receivers indoors without resorting to any other an tennas. Such antennas perform adequately as long as the receiver is in an area of high signal levels. However, many of the receivers are in weak signal areas and poor reception is obtained. In general, the poor reception results from causes such as low signal strength due to the distance between the receiving antenna and the sending antenna, the local electrical shielding of the building, the orientation of the receiver cabinet in a direction unfavorable to good reception or to high local noise generation.

In addition to these causes, many of the antennas built into receiver cabinets are compromise designs since it is necessary to limit the overall dimensions of the antenna to the dimensions of the cabinet that houses the receiver. Such compromises decrease the aperture or receiving ability of the antenna. The problem becomes more acute in the portable type receivers because of their small overall dimensions.

At present, in those areas where the signal-to-noise ratio is of such a value that there is unsatisfactory reception or where the signal strength is too low, it is necessary to employ outdoor antennas or indoor antennas such as rabbit ears. In many instances, it is impossible or extremely expensive to install and maintain the required outdoor antennas. On the other hand, conventional indoor antennas are often objectionable because of their unsightly appearance.

It is accordingly an object of the invention to provide an improved antenna having dimensions approaching the optimum values for good signal reception.

It is another object of the invention to provide an antenna for indoor reception which is optimally positioned with respect to the transmitting antenna and is at the same time inconspicuous.

It is a further object of the invention to provide an improved receiving antenna which is extremely simple and inexpensive to fabricate and at the same time easy to install and maintain.

Briefly, in accordance with the invention, an antenna is provided to be affixed on a plane surface. The antenna comprises a lamina of conductive material. The surface dimensions of the lamina are functionally related to the operating wave length of the signals being received by the antenna. Means are further provided for adhering one of the surfaces of the lamina to the plane surface.

It should be noted that such an antenna is easily applied to the walls, fioor or ceiling of a room. Once the antenna is placed in position, its location being chosen for optimum reception with respect to the transmitting antenna, it may be completely covered by Wallpaper, plasterboard or similar building materials and remains totally inconspicuous.

It should further be noted that such an antenna may easily be applied or incorporated in the windshield of a vehicle to provide optimum reception for mobile receivers.

Other objects, features and advantages of the invention will be apparent from the following detailed specification when read with the accompanying drawings wherein:

FIGURE 1 shows a half wave dipole antenna in accordance with one embodiment of the invention;

FIGURES 2A and 2B show a cross-section of the antenna taken along the lines 2--2 of FIGURE 1;

FIGURE 3 shows an antenna system comprising a folded dipole antenna and reflector in accordance with another embodiment of the invention;

FIGURE 4 shows a stacked array of bow tie antennas in accordance with a further embodiment of the invention; and

FIGURES 5 and 6 show the means for controlling the dimensions of a folded dipole antenna in accordance with a feature of the invention.

Referring to FIGURE 1, an antenna 3 is shown afiixed to a plane surface 10 such as a wall, ceiling or floor, in accordance with the invention. The antenna 8 is a half wave dipole antenna having elements 12 and 14. Each of the elements 12 and 14 has a length equal to one quarter of the operating wave length of the signal being received by the antenna 8. The leads 18 and 26 of a conventional two-wire transmission line 16 are respectively coupled to the elements 12 and 14 by clips 22 and 24. The other ends of the leads 18 and 20 are respectively provided with lugs 32 and 34 for connection to the receiver.

FIGURE 2A shows one embodiment of the element 14. In particular, the element 14 comprises a lamina 36 of a conductive material. The conductive material may be, for example, aluminum foil, but it may also be a nonmetallic substance which is electrically conductive at the wave lengths of the received signals. An adhesive medium 38 is disposed on one surface of the lamina 36. The adhesive material may be directly applied to the conductive lamina 36 or may be applied to a nonconductive material such as paper which is in turn fixed to the lamina 36. A protective layer 40 may be affixed to the other surface of lamina 36. The protective layer 40 may be of any suitable material such as paper or well known plastics. In some instances, the protective layer 40 can be conventional wallpaper. In other words, the antenna 8 is affixed to the plane surface 10 which may be a wall and then the wall is covered with wallpaper, thus hiding the antenna from view.

In FIGURE 2B, is an alternate embodiment of the element 14'. In particular, the lamina 36 of conductive material is completely enveloped in an insulative protective sheath 42. The protective sheath 42 may be of a well known plastic such as polyethylene. Disposed on one surface of the sheath 42 is an adhesive medium 44 to permit the affixing of the antenna 8 to the plane surface 10. It should be noted that the element 14' is a sandwich of a pair of layers of insulative protective material with the conductive lamina 36 disposed between the layers. It should further be noted that FIGURES 2A and 2B show the elements 14 and 14' having an exaggerated thickness for the sake of clarity. In general the thickness of the element 14 and the similar element 12 will be in the order of thousandths of an inch. It should be noted that although there is the provision for an adhesive layer, in some instances, an adhesive layer is not necessary. For example, the lamina 36 may be sandwiched between two sheets of glass in a window or a windshield.

FIGURE 3 shows an antenna system embodying the principles of the invention. In particular, the antenna system comprises a folded-dipole antenna 48 and a reflector 50. Folded-dipole antenna 48 and reflector 50 have the same construction as the element 14 of FIG- URE l, the only difference being in surface geometry. The clips 22 and 24 extending from the leads of transmission line 16 are connected to the folded-dipole antenna 48 to permit the coupling of the antenna system to a receiver. The folded-dipole antenna 48 has a length equal to one-half the operating wave length of the signal being received, while the reflector 50 has a length which is five percent greater.

FIGURE 4 shows an antenna system 58 affixed to the plane surface 10. The antenna system 58 comprises a pair of bow tie antennas 58a and 58b, connected by the transmission line 60. The bow tie antennas 58a and 58b and the transmission line 66 are of similar construction as shown in FIGURES 2A and 2B. Terminals 62 and 64 may be incorporated in the transmission line 69 to couple the antenna system 58 to a receiver.

Since the length of an antenna determines the optimum operating wave length for reception, it is necessary to fix the length of the antenna to the length required for optimum reception of a signal having a particular operating wavelength. Accordingly, FIGURE 5 shows folded-dipole antenna 48 having a plurality of indicators CH2 to CH13 along its length. These indicators are at pre-determined positions D as indicated in the following table:

Table I Channel D in to et As is shown in FIGURE 5, the overall dimensions for the folded-dipole antenna 48 are for television channel 2. To tune the antenna to a higher channel such as television channel 10, it is only necessary to shorten the arms 48a and 48b by deleting the portion between the indicators CH and CH2. As shown in FIGURE 6, this deletion may be accomplished by a simple cutting operation or by folding the arms 48a and 2812 back along the line CHIN The excess portion of the arm 480 may be folded as is shown in FIGURE 6 and hidden behind the exposed portion of the arm 480. Of course, it should be noted that the antenna 48 may comprise two sections separated at the indicator CH2 on arm 480. The trimming operation then would be required for both the arms 48a and 48b and the arm 48c. There would further be required an overlapping electrical connection between the two portions of the arm 48c.

It should be noted that, in general, antennas may be used interchangeably for transmitting and receiving. Therefore, although the discussion has been directed toward receiving antennas, the antennas are equally applicable to transmission systems and there is no intent to restrict them to receiver.

There has thus been shown an improved receiving antenna which may have the required dimensions for optimum reception of signals, that may be used indoors without being conspicuous. The antenna besides being highly efficient, is extremely simple and inexpensive to fabricate.

There will now be obvious to those skilled in the art many modifications and variations which accomplish the objects and satisfy many or all of the advantages but which do not depart from the spirit of the invention as defined in the appended claims.

What is claimed is:

1. An antenna, for use in the very high frequency range for TV or FM operation, such antenna comprising a folded-dipole of a thin metal lamina consisting of two dipole elements and a back connecting element, each of the dipole elements having calibration lines marked thereon, transverse to the length of the element and identified by a corresponding broadcasting channel number, to locate and define fold lines at which the dipole elements may be folded with the adjacent ends folded back upon the dipole elements so the remaining effective lengths of said dipole elements will constitute quarter wave length sections for the frequency of the selected broadcasting channel, whereupon said two shortened dipole elements may be placed in closer ali ned end-spaced juxtaposition to establish an overall length including such spacing that will be approximately a half-wave length, and the back connecting element having similar marking lines in mirror-spaced pairs, relative to a virtual center line, identifying a broadcasting channel number and serving to define fold lines at which said back connecting element may be folded, to form an intermediate folded section that may be folded back against either of the adjacent side sections of said back connecting element, to bring the two fold lines of said back connecting element into coincidence to establish a linear dimension in said back connecting element at a value corresponding to slightly more than a half wave length, to accommodate the spacing between the adjacent facing ends of the folded-dipole elements. I

2. An antenna, as in claim 1, in which one side surface of the dipole and of the back connecting elements is provided with a layer of adhesive material, whereby the antenna may be afiixed to a supporting surface in the relationship established by said folding operations.

References Cited in the file of this patent UNITED STATES PATENTS 1,855,155 Sampson Apr. 19, 1932 2,656,463 Woodward Oct. 20, 1953 2,778,017 Dorcsjak Jan. 15, 1957 2,866,195 Powlison Dec. 23, 1958

US3025524A 1959-05-06 1959-05-06 Calibrated thin metal lamina antenna Expired - Lifetime US3025524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3025524A US3025524A (en) 1959-05-06 1959-05-06 Calibrated thin metal lamina antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3025524A US3025524A (en) 1959-05-06 1959-05-06 Calibrated thin metal lamina antenna

Publications (1)

Publication Number Publication Date
US3025524A true US3025524A (en) 1962-03-13

Family

ID=25206193

Family Applications (1)

Application Number Title Priority Date Filing Date
US3025524A Expired - Lifetime US3025524A (en) 1959-05-06 1959-05-06 Calibrated thin metal lamina antenna

Country Status (1)

Country Link
US (1) US3025524A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143737A (en) * 1962-08-03 1964-08-04 Virginia T Norwood Folded sigma-shaped dipole antenna
US3400402A (en) * 1965-03-12 1968-09-03 Collins Radio Co Wire antenna extensible along calibrated support means
US3543273A (en) * 1968-06-04 1970-11-24 Gavin Instr Inc Indoor antenna with pressure sensitive adhesive mounting means for enabling the antenna to be mounted on wall surface or receiver cabinet
US3689929A (en) * 1970-11-23 1972-09-05 Howard B Moody Antenna structure
JPS536147U (en) * 1976-07-02 1978-01-19
FR2505098A1 (en) * 1981-04-29 1982-11-05 Modern Radio Sarl Wideband wave detector for RF signals - comprises flat oscillating panel containing metallic elements connected by diodes to cable
US4471358A (en) * 1963-04-01 1984-09-11 Raytheon Company Re-entry chaff dart
US4686536A (en) * 1985-08-15 1987-08-11 Canadian Marconi Company Crossed-drooping dipole antenna
US5182570A (en) * 1989-11-13 1993-01-26 X-Cyte Inc. End fed flat antenna
US5691734A (en) * 1994-06-01 1997-11-25 Alan Dick & Company Limited Dual polarizating antennae
US5706018A (en) * 1996-06-21 1998-01-06 Yankielun; Norbert E. Multi-band, variable, high-frequency antenna
US5986382A (en) * 1997-08-18 1999-11-16 X-Cyte, Inc. Surface acoustic wave transponder configuration
US6060815A (en) * 1997-08-18 2000-05-09 X-Cyte, Inc. Frequency mixing passive transponder
US6107910A (en) * 1996-11-29 2000-08-22 X-Cyte, Inc. Dual mode transmitter/receiver and decoder for RF transponder tags
US6114971A (en) * 1997-08-18 2000-09-05 X-Cyte, Inc. Frequency hopping spread spectrum passive acoustic wave identification device
US6208062B1 (en) 1997-08-18 2001-03-27 X-Cyte, Inc. Surface acoustic wave transponder configuration
US6211840B1 (en) 1998-10-16 2001-04-03 Ems Technologies Canada, Ltd. Crossed-drooping bent dipole antenna
US6326932B1 (en) * 1994-07-08 2001-12-04 Michael Mannan Planar antenna on electrically—insulating sheet
US6593886B2 (en) * 2001-01-02 2003-07-15 Time Domain Corporation Planar loop antenna
US20040246179A1 (en) * 2003-06-04 2004-12-09 Auden Techno Corp. Multi-frequency antenna with single layer and feeding point
US20050035919A1 (en) * 2003-08-15 2005-02-17 Fan Yang Multi-band printed dipole antenna

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1855155A (en) * 1929-08-19 1932-04-19 John C Sampson Radio lead or aerial
US2656463A (en) * 1951-04-03 1953-10-20 Rca Corp Broad-band directive antenna
US2778017A (en) * 1953-01-21 1957-01-15 Marjo Technical Products Co Portable antenna
US2866195A (en) * 1954-02-23 1958-12-23 Neil C Powlison Television receiving antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1855155A (en) * 1929-08-19 1932-04-19 John C Sampson Radio lead or aerial
US2656463A (en) * 1951-04-03 1953-10-20 Rca Corp Broad-band directive antenna
US2778017A (en) * 1953-01-21 1957-01-15 Marjo Technical Products Co Portable antenna
US2866195A (en) * 1954-02-23 1958-12-23 Neil C Powlison Television receiving antenna

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143737A (en) * 1962-08-03 1964-08-04 Virginia T Norwood Folded sigma-shaped dipole antenna
US4471358A (en) * 1963-04-01 1984-09-11 Raytheon Company Re-entry chaff dart
US3400402A (en) * 1965-03-12 1968-09-03 Collins Radio Co Wire antenna extensible along calibrated support means
US3543273A (en) * 1968-06-04 1970-11-24 Gavin Instr Inc Indoor antenna with pressure sensitive adhesive mounting means for enabling the antenna to be mounted on wall surface or receiver cabinet
US3689929A (en) * 1970-11-23 1972-09-05 Howard B Moody Antenna structure
JPS536147U (en) * 1976-07-02 1978-01-19
FR2505098A1 (en) * 1981-04-29 1982-11-05 Modern Radio Sarl Wideband wave detector for RF signals - comprises flat oscillating panel containing metallic elements connected by diodes to cable
US4686536A (en) * 1985-08-15 1987-08-11 Canadian Marconi Company Crossed-drooping dipole antenna
US5182570A (en) * 1989-11-13 1993-01-26 X-Cyte Inc. End fed flat antenna
US5691734A (en) * 1994-06-01 1997-11-25 Alan Dick & Company Limited Dual polarizating antennae
US6326932B1 (en) * 1994-07-08 2001-12-04 Michael Mannan Planar antenna on electrically—insulating sheet
US5706018A (en) * 1996-06-21 1998-01-06 Yankielun; Norbert E. Multi-band, variable, high-frequency antenna
US6950009B1 (en) 1996-11-29 2005-09-27 X-Cyte, Inc. Dual mode transmitter/receiver and decoder for RF transponder units
US6531957B1 (en) * 1996-11-29 2003-03-11 X-Cyte, Inc. Dual mode transmitter-receiver and decoder for RF transponder tags
US6107910A (en) * 1996-11-29 2000-08-22 X-Cyte, Inc. Dual mode transmitter/receiver and decoder for RF transponder tags
US7741956B1 (en) 1996-11-29 2010-06-22 X-Cyte, Inc. Dual mode transmitter-receiver and decoder for RF transponder tags
US6208062B1 (en) 1997-08-18 2001-03-27 X-Cyte, Inc. Surface acoustic wave transponder configuration
US6114971A (en) * 1997-08-18 2000-09-05 X-Cyte, Inc. Frequency hopping spread spectrum passive acoustic wave identification device
US6060815A (en) * 1997-08-18 2000-05-09 X-Cyte, Inc. Frequency mixing passive transponder
US7132778B1 (en) 1997-08-18 2006-11-07 X-Cyte, Inc. Surface acoustic wave modulator
US5986382A (en) * 1997-08-18 1999-11-16 X-Cyte, Inc. Surface acoustic wave transponder configuration
US6611224B1 (en) 1997-08-18 2003-08-26 X-Cyte, Inc. Backscatter transponder interrogation device
US6211840B1 (en) 1998-10-16 2001-04-03 Ems Technologies Canada, Ltd. Crossed-drooping bent dipole antenna
US6593886B2 (en) * 2001-01-02 2003-07-15 Time Domain Corporation Planar loop antenna
US20040246179A1 (en) * 2003-06-04 2004-12-09 Auden Techno Corp. Multi-frequency antenna with single layer and feeding point
US6870506B2 (en) * 2003-06-04 2005-03-22 Auden Techno Corp. Multi-frequency antenna with single layer and feeding point
US20050035919A1 (en) * 2003-08-15 2005-02-17 Fan Yang Multi-band printed dipole antenna

Similar Documents

Publication Publication Date Title
US3599214A (en) Automobile windshield antenna
US3239838A (en) Dipole antenna mounted in open-faced resonant cavity
US3231892A (en) Antenna feed system simultaneously operable at two frequencies utilizing polarization independent frequency selective intermediate reflector
US3555552A (en) Dual polarized antenna system with controlled field pattern
US3754271A (en) Broadband antenna polarizer
US4772890A (en) Multi-band planar antenna array
US4724443A (en) Patch antenna with a strip line feed element
US5872545A (en) Planar microwave receive and/or transmit array antenna and application thereof to reception from geostationary television satellites
EP0332139A2 (en) Wide band antenna for mobile communications
US20040107641A1 (en) Sidelobe controlled radio transmission region in metallic panel
US5504478A (en) Radio frequency control system
US5697063A (en) Indoor radio communication system
US2423648A (en) Antenna
US5596336A (en) Low profile TEM mode slot array antenna
US4829591A (en) Portable radio
US3963999A (en) Ultra-high-frequency leaky coaxial cable
US2863145A (en) Spiral slot antenna
US5760744A (en) Antenna pane with antenna element protected from environmental moisture effects
US6281847B1 (en) Electronically steerable and direction finding microstrip array antenna
US4554549A (en) Microstrip antenna with circular ring
US2507528A (en) Antenna
US5539414A (en) Folded dipole microstrip antenna
US4038662A (en) Dielectric sheet mounted dipole antenna with reactive loading
US6165601A (en) Electromagnetic-wave absorber
US4263598A (en) Dual polarized image antenna