GB1211723A - Loop antenna - Google Patents

Loop antenna

Info

Publication number
GB1211723A
GB1211723A GB50094/67A GB5009467A GB1211723A GB 1211723 A GB1211723 A GB 1211723A GB 50094/67 A GB50094/67 A GB 50094/67A GB 5009467 A GB5009467 A GB 5009467A GB 1211723 A GB1211723 A GB 1211723A
Authority
GB
United Kingdom
Prior art keywords
coils
rods
aerial
shield
printed circuit
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
Application number
GB50094/67A
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.)
L T V ELECTROSYSTEMS Inc
Ltv Electrosystems Inc
Original Assignee
L T V ELECTROSYSTEMS Inc
Ltv Electrosystems 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
Application filed by L T V ELECTROSYSTEMS Inc, Ltv Electrosystems Inc filed Critical L T V ELECTROSYSTEMS Inc
Publication of GB1211723A publication Critical patent/GB1211723A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

1,211,723. Aerials. L.T.V. ELECTROSYSTEMS Inc. 3 Nov., 1967 [9 Dec., 1966], No. 50094/67. Heading H4A. An aerial comprises a closed core of ferromagnetic material in which two parallel rods 12, 13, Fig. 2, are joined together at respective adjacent ends by end-pieces 14, 15. The height h of an end-piece is greater than the thickness t of a rod, and the width w of an endpiece is greater than the outside spacing s of the rods. Coils 16, 17 are wound on respective rods 12, 13 and they are so connected that magnetic fluxes due to incident radio waves produce voltages which are additive, whereas the magnetic fluxes induced by a current flowing in the coils are opposed. As shown, the coils 16, 17 are of the same hand, and the finish end t1 of the coil 16 is connected to the start end t2 of the coil 17. Alternatively, the two coils may be of opposite hands, and their finish ends be connected together. Slotted conductive discs made, for example, of aluminium, may be placed over one or both of the parallel rods between the coils and the endpieces, in order to reduce flux leakages and stray couplings (Fig. 3, not shown). The coils may have equal numbers of turns which may be distributed over the entire lengths of the rods, and said rods may be of elongate form. An aerial of the kind described may be mounted on a base-plate 101, Fig. 4, on top of which is a printed circuit board shield 102, by means of dielectric material support members 106.1, 106.2, and (103.1), (103.2), Fig. 5 (not shown). A cylindrical printed circuit shield 110 rests around the aerial with its bottom rim cemented to the board 102, and it is filled with foamed material, embedding the aerial. A top printed circuit board shield 111 closes the cylindrical shield 110. All parts of the assembly above the base-plate 101 are contained in a moulded plastics cover 112. A metal tray 113 to which a lead connector 114 and fastening sockets 115 are attached, is secured to the base-plate 101, with spacers 116 intervening. The tray is filled with foamed material 117.
GB50094/67A 1966-12-09 1967-11-03 Loop antenna Expired GB1211723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60046666A 1966-12-09 1966-12-09

Publications (1)

Publication Number Publication Date
GB1211723A true GB1211723A (en) 1970-11-11

Family

ID=24403717

Family Applications (5)

Application Number Title Priority Date Filing Date
GB24662/70A Expired GB1211724A (en) 1966-12-09 1967-11-03 Loop antenna
GB50094/67A Expired GB1211723A (en) 1966-12-09 1967-11-03 Loop antenna
GB24664/70A Expired GB1211726A (en) 1966-12-09 1967-11-03 Loop antenna
GB24665/70A Expired GB1211727A (en) 1966-12-09 1967-11-03 Loop antenna
GB24663/70A Expired GB1211725A (en) 1966-12-09 1967-11-03 Loop antenna

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB24662/70A Expired GB1211724A (en) 1966-12-09 1967-11-03 Loop antenna

Family Applications After (3)

Application Number Title Priority Date Filing Date
GB24664/70A Expired GB1211726A (en) 1966-12-09 1967-11-03 Loop antenna
GB24665/70A Expired GB1211727A (en) 1966-12-09 1967-11-03 Loop antenna
GB24663/70A Expired GB1211725A (en) 1966-12-09 1967-11-03 Loop antenna

Country Status (2)

Country Link
US (1) US3495264A (en)
GB (5) GB1211724A (en)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634888A (en) * 1970-05-01 1972-01-11 John J Reidy Ferrite loop antenna for vehicle mounting
US3683389A (en) * 1971-01-20 1972-08-08 Corning Glass Works Omnidirectional loop antenna array
US3721989A (en) * 1971-06-30 1973-03-20 Northrop Corp Cross loop antenna
US3719950A (en) * 1971-11-03 1973-03-06 A Bukhman Antenna system for vhf and uhf radio direction finders
US3872455A (en) * 1971-11-17 1975-03-18 Monitron Ind Physiological measurement display system
US4109223A (en) * 1975-09-29 1978-08-22 Ndm Corporation Multiple choke assembly
US4290070A (en) * 1979-05-09 1981-09-15 Osamu Tanaka Magnetic loop antenna with diamagnetic properties
JPS61128609A (en) * 1984-11-27 1986-06-16 Toyota Motor Corp Antenna device for automobile
US5159332A (en) * 1989-06-05 1992-10-27 Walton Charles A Proximity identification system with flux concentration in operating region
CH682265A5 (en) * 1991-02-12 1993-08-13 Actron Entwicklungs Ag
KR100459839B1 (en) * 1995-08-22 2005-02-07 미쓰비시 마테리알 가부시키가이샤 Antennas and transponders for transponders
US6014111A (en) * 1997-06-05 2000-01-11 Megapulse, Inc. Ferrite crossed-loop antenna of optimal geometry and construction and method of forming same
US6740075B2 (en) * 2000-01-21 2004-05-25 Medtronic Minimed, Inc. Ambulatory medical apparatus with hand held communication device
GB2358964A (en) * 2000-02-05 2001-08-08 Roke Manor Research Ferromagnetic core cross loop Loran C antenna
JP2003218625A (en) * 2002-01-04 2003-07-31 Dafang Electronic Co Ltd Loop antenna system and wireless transmission device
US7729766B2 (en) 2003-10-02 2010-06-01 Medtronic, Inc. Circuit board construction for handheld programmer
US7203549B2 (en) * 2003-10-02 2007-04-10 Medtronic, Inc. Medical device programmer with internal antenna and display
US20050075685A1 (en) * 2003-10-02 2005-04-07 Forsberg John W. Medical device programmer with infrared communication
US7991479B2 (en) * 2003-10-02 2011-08-02 Medtronic, Inc. Neurostimulator programmer with clothing attachable antenna
US7561921B2 (en) * 2003-10-02 2009-07-14 Medtronic, Inc. Neurostimulator programmer with internal antenna
US8442643B2 (en) * 2003-10-02 2013-05-14 Medtronic, Inc. Medical device programmer with reduced-noise power supply
US7356369B2 (en) * 2003-10-02 2008-04-08 Medtronic, Inc. Z-axis assembly of medical device programmer
US7263406B2 (en) * 2003-10-02 2007-08-28 Medtronic, Inc. Medical device programmer with selective disablement of display during telemetry
US7272445B2 (en) * 2003-10-02 2007-09-18 Medtronic, Inc. Medical device programmer with faceplate
JP5162648B2 (en) * 2010-12-01 2013-03-13 デクセリアルズ株式会社 ANTENNA DEVICE AND COMMUNICATION DEVICE
US8957753B2 (en) * 2011-11-22 2015-02-17 Abb Technology Ag Current transformer
US9755765B2 (en) * 2014-06-23 2017-09-05 Raytheon Company Magnetic antennas for ultra low frequency and very low frequency radiation
CN106803120A (en) * 2015-11-26 2017-06-06 惠州市三和物联网科技有限公司 A kind of electronic label antenna with anti-shielding function
US20170155285A1 (en) * 2015-11-30 2017-06-01 Electronics And Telecommunications Research Institute Open type resonance coil without dual loops having serial type in-phase direct power feeding method without dual loops
CN114334399A (en) * 2016-08-19 2022-04-12 马克西姆综合产品公司 Coupled inductor for low electromagnetic interference

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2375593A (en) * 1943-04-01 1945-05-08 Rca Corp Reception of signals on a loop antenna
US2955286A (en) * 1958-02-24 1960-10-04 Internat Res & Dev Corp Plural loop antenna having ferrite cores

Also Published As

Publication number Publication date
GB1211725A (en) 1970-11-11
US3495264A (en) 1970-02-10
GB1211726A (en) 1970-11-11
GB1211724A (en) 1970-11-11
GB1211727A (en) 1970-11-11

Similar Documents

Publication Publication Date Title
GB1211723A (en) Loop antenna
KR850003789A (en) RF coil for nuclear magnetic resonance
KR850004643A (en) RF coil for nuclear magnetic resonance
GB1231108A (en)
ES422973A1 (en) Electric transformers
ES256089A1 (en) Electrostatically-shielded loop antenna
US3390364A (en) Variable reactor having coil and signal coils on toroidal core
JPS57132083A (en) Antenna device for portable timepiece
GB990484A (en) Improvements in or relating to electromagnetic flowmeters
GB1216905A (en) Improvements in or relating to magnetically cored coils and methods of making the same
FI41465C (en) Spin-coupled nuclear magnetic resonant magnetometer
IL29748A (en) Magnetically coupled core and coil arrangement for magnetic compass
GB962009A (en) Improvements in or relating to electrical inductance coils
GB1015545A (en) Improvements in ceramic ferromagnetic cores for inductors or transformers
CA706520A (en) Nuclear magnetic resonance magnetometer
ES308841A3 (en) Improvements in line output transformers in television receivers. (Machine-translation by Google Translate, not legally binding)
ES256829A1 (en) Anodised helical tape waveguide for modulating arrangements
AU414269B2 (en) Nuclear magnetic resonance magnetometers including electronic resonance enhancement
ES140781U (en) Coil structure for high frequency circuits. (Machine-translation by Google Translate, not legally binding)
GB1256076A (en) Electromagnetic coils
ES340382A3 (en) Improvements in the manufacture of stabilizers of tension to magnetic saturation. (Machine-translation by Google Translate, not legally binding)
CH491481A (en) High voltage inductor coil without magnetic circuit
ES224165A1 (en) Improvements in magnetic antennas (Machine-translation by Google Translate, not legally binding)
CA676062A (en) Ferrite with constricted magnetic hysteresis loop
JOHNSON et al. Techniques of energizing air core electro- magnetic simulators(Electromagnetic simulators with unique arrangement of magnetic field coils and equalizing bands provide uniform field intensity over useful test volumes)

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees