GB720721A - Improvements in and relating to radio aerials - Google Patents

Improvements in and relating to radio aerials

Info

Publication number
GB720721A
GB720721A GB4418/53A GB441853A GB720721A GB 720721 A GB720721 A GB 720721A GB 4418/53 A GB4418/53 A GB 4418/53A GB 441853 A GB441853 A GB 441853A GB 720721 A GB720721 A GB 720721A
Authority
GB
United Kingdom
Prior art keywords
coils
aerial
band
wave
core
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
GB4418/53A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB720721A publication Critical patent/GB720721A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements

Abstract

720,721. Aerials. GRUNDIG, M. Feb. 17, 1953 [May 23,1962; Aug. 9, 1952], No. 4418/63. Class 40 (7). An aerial comprises a coil K of high permeability magnetic material and of elongated form on which is mounted at least two coils I and II located on the core at points where the product of the inductance (L) and the Q factor at the frequency of use, is approximately at its maximum value. Fig. 1 shows graphically above a diagram of the aerial the variations of L, Q, and LXQ, for variations in the positioning of the coils. The core need not be straight but may be of S, C, or angular shape and the coils are preferably subdivided into separate spaced serially connected small coils S<SP>1</SP>, S<SP>2</SP>, S<SP>3</SP> and S<SP>4</SP>, S<SP>5</SP>, S<SP>6</SP>. One of the coils may be mounted adjustably for tuning purposes and the aerial is most sensitive if the higher potential ends of the coils face inwards. An aerial, Fig. 2 (not shown), arranged according to the invention for a number of wave ranges may consist of a ferrite core wound with two silver plated copper tape coils in series brought out to the short wave-band connection terminals, a set of two sectioned coils similar to those of Fig. 1 brought out to the medium wave-band terminals, and two extra sectioned coils that may be connected in series with the medium band coils for use over the long wave-band. When the aerial is to be used for ultra-short waves the core K is made to resonate as a dipole in the range to be received and coupling to it effected by any suitable means.
GB4418/53A 1952-05-23 1953-02-17 Improvements in and relating to radio aerials Expired GB720721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE720721X 1952-05-23

Publications (1)

Publication Number Publication Date
GB720721A true GB720721A (en) 1954-12-22

Family

ID=6628514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4418/53A Expired GB720721A (en) 1952-05-23 1953-02-17 Improvements in and relating to radio aerials

Country Status (1)

Country Link
GB (1) GB720721A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193076A (en) * 1977-04-26 1980-03-11 Sansui Electric Co. Ltd. Coupling an outer antenna with a radio receiver having a bar antenna
FR2608845A1 (en) * 1986-12-22 1988-06-24 Pizon Ernest Receiving or transmitting antenna esp. for car radio - has prim. winding of coupling transformer inserted into loop formed by windings on rectangular ferrite bars

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193076A (en) * 1977-04-26 1980-03-11 Sansui Electric Co. Ltd. Coupling an outer antenna with a radio receiver having a bar antenna
FR2608845A1 (en) * 1986-12-22 1988-06-24 Pizon Ernest Receiving or transmitting antenna esp. for car radio - has prim. winding of coupling transformer inserted into loop formed by windings on rectangular ferrite bars

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