WO2006062492A1 - Antenne de petite taille - Google Patents

Antenne de petite taille Download PDF

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Publication number
WO2006062492A1
WO2006062492A1 PCT/UA2005/000012 UA2005000012W WO2006062492A1 WO 2006062492 A1 WO2006062492 A1 WO 2006062492A1 UA 2005000012 W UA2005000012 W UA 2005000012W WO 2006062492 A1 WO2006062492 A1 WO 2006062492A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
passive
active
small
passive loops
Prior art date
Application number
PCT/UA2005/000012
Other languages
English (en)
Russian (ru)
Inventor
Alexandr Ivanovich Karpov
Original Assignee
Alexandr Ivanovich Karpov
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 Alexandr Ivanovich Karpov filed Critical Alexandr Ivanovich Karpov
Publication of WO2006062492A1 publication Critical patent/WO2006062492A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the claimed technical solution relates to radio engineering and can be used as antennas of radio devices for various purposes.
  • Small-sized antennas are known, for example helical and ring antennas. Their main disadvantage is low efficiency and, as a consequence, low gain.
  • the aim of the alleged invention is to reduce the size of the antenna.
  • the claimed small-sized antenna contains an active loop vibrator loaded on a shortening capacitance, into the gap of which an extension coil is included, and the metal plate forming a shortening capacitance can be corrugated.
  • an extension coil is wound on a ferromagnetic core, while its turns are placed parallel to the current in the antenna.
  • An active loop vibrator may consist of two flat metal plates, between which N winding ferromagnetic cores of extension coils are connected in parallel.
  • the antenna may contain passive loops, in the rupture of which are included extension coils wound on ferromagnetic cores, the turns of which are placed parallel to the current in the passive loops, while the first ends of the passive loops are connected to the shortening capacitance, and the second are interconnected. The interconnected second ends of the passive loops can be attached to the counterweight.
  • Increasing the width of the active loop vibrator allows you to expand the antenna bandwidth with a small length. And the introduction of ferrite cores into extension coils made it possible to increase the efficiency of magnetic emitters and reduce their size.
  • An increase in the number of passive emitters increased the radiation resistance of the antenna, expanded its passband and increased efficiency at small sizes.
  • the connection of the second ends of the passive loops with each other equalizes their resonance frequencies, and the connection of their first and second ends to metal plates creates a capacitive load, increases the efficiency and bandwidth and reduces the size of the antenna.
  • FIG. 1 Antenna with a wide active loop vibrator.
  • FIG. 2. Connection diagram in an antenna with a wide active loop vibrator. 5 FIG. 3. Antenna with active and passive loops.
  • FIG. 4 Connection diagram in an antenna with active and passive loops.
  • FIG. 1 shows a small antenna with an active loop vibrator made of two wide plates.
  • the antenna includes an active loop vibrator 1 made of two wide plates located in the same plane and between the plates of which N coils 2 are wound in parallel, wound on ferromagnetic cores 3, while the free end of the top plate of the loop vibrator is connected to a shortening capacitance 4, which can be corrugated, and 15 the free end of the bottom plate of the vibrator is connected to the feeder line 5.
  • the electrical connections of this antenna are shown in FIG. 2.
  • the antenna works as follows. Under the influence of the received signal, when using the antenna as the receiving one or under the influence of the signal coming from the feeder 5, when using the 20 antenna as the transmitting one, common-mode electric currents flow in the active loop vibrator 1 and in the extension coils 2, emitting emitted or received power, and on loss resistance, thermal power. But since the antenna parameters are selected in such a way that the radiation resistance 25 is many times greater than the loss resistance, the antenna efficiency is kept high. This is facilitated by the parallel inclusion of N extension coils, which are connected to each other and to the vibrator by electromagnetic coupling. Therefore, the total radiation resistance of the antenna with N coils increases N 2 times in relation to a single antenna. At the same time, as the loss resistance increases only N times. Height s The introduction of ferrite cores 3 into the coils also contributes to the radiation resistance. All this leads to an increase in the antenna efficiency.
  • FIG. 3 shows an antenna with active and passive loops.
  • the antenna includes an active loop-vibrator, consisting of a linear conductor 1 and a coil 2 wound on a ferrite core 3, while the linear conductor is connected at one end to a shortening capacitance 4, and the second to the first output of the coil, the second output of the coil is connected to the feeder line 5 , the antenna also contains N passive loops, consisting of a first linear conductor 6 connected at one end to a shortening capacitance, and the second to the first output
  • the second terminal of the extension coil is connected to the first end of the second line conductor 9, the second end of which is connected to the second ends of the remaining N-I passive loops.
  • the electrical circuit diagram of the antenna is shown in FIG. 4. If effective
  • the antenna works as follows.
  • the electric energy coming from the feeder 5 excites electric vibrations in the active loop vibrator.
  • the active loop-vibrator 25 linear parts 1 of the active loop-vibrator, emits the electric component of the electromagnetic field, and flowing through the turns of the coil 2, the same current emits the magnetic component of the electromagnetic field.
  • in-phase electric current oscillations are excited in the latter and radiation similar radiation from an active loop vibrator.
  • the radiation resistance of the antenna increases (N + 1) 2 times, relative to a single antenna, which is accompanied by an increase in the efficiency and gain of the antenna.
  • the proposed antenna with a large radiation resistance has a small wave impedance and minimal loss resistance. This provides high efficiency and wide antenna bandwidth at minimum sizes.
  • the plate forming the shortening capacitance is corrugated. All this allows you to create small-sized antennas for various applications with the required parameters at the minimum cost of their manufacture. These antennas successfully work both on the underlying surface and with a small counterweight, which is especially valuable in portable communications.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

La présente invention relève du domaine de la radiotechnique et permet de produire des antennes efficaces de petite taille destinées à différentes applications. L'antenne de cette invention se compose d'une boucle active et de boucles passives et de bobines d'allongement qui sont insérées dans des interstices des boucles active et passives et qui sont enroulées sur des noyaux en ferrite. Les conducteurs supérieurs des boucles active et passives sont connectés à un condensateur réducteur, tandis que les conducteurs inférieurs de la boucle active sont connectés à un feeder, et ceux des boucles passives sont interconnectés et peuvent être connectés à un contrepoids.
PCT/UA2005/000012 2004-12-08 2005-03-30 Antenne de petite taille WO2006062492A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UA20041210096 2004-12-08
UA20041210096 2004-12-08

Publications (1)

Publication Number Publication Date
WO2006062492A1 true WO2006062492A1 (fr) 2006-06-15

Family

ID=36578198

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/UA2005/000012 WO2006062492A1 (fr) 2004-12-08 2005-03-30 Antenne de petite taille

Country Status (1)

Country Link
WO (1) WO2006062492A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2048738A1 (fr) * 2007-10-09 2009-04-15 N.V. Nederlandsche Apparatenfabriek NEDAP Antenne ferrite magnétique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1901025A (en) * 1926-09-08 1933-03-14 Rca Corp Aerial
FR2552587A1 (fr) * 1983-09-28 1985-03-29 Dassault Avions Antenne commutable pour les gammes de frequences vhf et uhf
UA39763A (uk) * 2001-02-15 2001-06-15 Олександр Іванович Карпов Електромагнітна антена
UA68831A (en) * 2003-11-06 2004-08-16 Oleksandr Ivanovych Karpov Wideband antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1901025A (en) * 1926-09-08 1933-03-14 Rca Corp Aerial
FR2552587A1 (fr) * 1983-09-28 1985-03-29 Dassault Avions Antenne commutable pour les gammes de frequences vhf et uhf
UA39763A (uk) * 2001-02-15 2001-06-15 Олександр Іванович Карпов Електромагнітна антена
UA68831A (en) * 2003-11-06 2004-08-16 Oleksandr Ivanovych Karpov Wideband antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2048738A1 (fr) * 2007-10-09 2009-04-15 N.V. Nederlandsche Apparatenfabriek NEDAP Antenne ferrite magnétique

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