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EP1361624B1 - Antenne en forme polygonale - Google Patents

Antenne en forme polygonale Download PDF

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Publication number
EP1361624B1
EP1361624B1 EP03009090A EP03009090A EP1361624B1 EP 1361624 B1 EP1361624 B1 EP 1361624B1 EP 03009090 A EP03009090 A EP 03009090A EP 03009090 A EP03009090 A EP 03009090A EP 1361624 B1 EP1361624 B1 EP 1361624B1
Authority
EP
European Patent Office
Prior art keywords
antenna
side edges
antenna according
conductive
side edge
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
EP03009090A
Other languages
German (de)
English (en)
Other versions
EP1361624A1 (fr
Inventor
Wolfgang Wendel
Peter-Sebastian Schramm
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.)
Hirschmann Electronics GmbH and Co KG
Hirschmann Electronics GmbH
Original Assignee
Hirschmann Electronics GmbH and Co KG
Hirschmann Electronics GmbH
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 Hirschmann Electronics GmbH and Co KG, Hirschmann Electronics GmbH filed Critical Hirschmann Electronics GmbH and Co KG
Publication of EP1361624A1 publication Critical patent/EP1361624A1/fr
Application granted granted Critical
Publication of EP1361624B1 publication Critical patent/EP1361624B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01Q9/40—Element having extended radiating surface
    • 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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system

Definitions

  • the invention relates to an antenna, in particular an antenna for receiving digital terrestrial signals such as DVB-T signals, according to the features of the preamble of claim 1.
  • the radio waves (signals) radiated from transmitters are transmitted through antennas, such as a pair of antennas. Bar antennas, to be received.
  • the antenna in particular the Marconi antenna known per se, was tuned to ⁇ / 4 of the radio waves, so that thus a sufficient bandwidth for television reception was possible.
  • the previously emitted analog signals had disadvantages, in particular with regard to the quality of the received images and the extent of the signal contents, so that a conversion from the analogue to the digital signals takes place. Therefore, previously known antenna systems are no longer suitable for digital signal reception. Since the previously known antennas are mainly horizontally polarized, they are not suitable for digital signal reception because these digital signals are broadcast vertically.
  • WO-A-0122528 shows an antenna with an electrically conductive antenna structure and optionally a non-conductive support structure.
  • These Antenna structure has the basic shape of an acute-angled triangle whose side edges have an at least once pointed course.
  • a generic antenna with an electrically conductive antenna structure and optionally an electrically non-conductive support structure wherein the antenna structure has the basic shape of an acute-angled triangle whose side edges have an at least once pointed course, with a tip of the triangle a foot point forms the antenna and the side edges extend from the base and widen with respect to a basic axis and join at the end of the side edges facing inwards in the direction of the basic axis side edges.
  • the invention is therefore based on the object to provide an antenna system for receiving in particular digital terrestrial signals, which is small and inexpensive and over the entire frequency range has a constant high gain and a good fit and omnidirectional characteristic.
  • the foot point for a ground surface which extends up to the first inwardly directed side edge. Due to the pointed shape of the side edges, a significantly improved Marconi antenna is realized, which has a very high bandwidth. For example, in the DVB-T range, a bandwidth of about 470 MHz to 862 MHz can be achieved.
  • the required high adaptation is achieved by this antenna structure according to the invention.
  • the antenna has a typical gain of +1.5 dB over a ⁇ / 2 dipole over the entire frequency range and in addition a very good omnidirectional characteristic as well as flat emission characteristics.
  • the figure shows from 1 to 6 the development of the antenna according to the invention, wherein the still to be presented conditions have been taken into account.
  • FIG. 1 shows a rectangle 1 which, taking into account the frequency range to be received, principally shows the available dimensions.
  • the dimensions of the rectangle are based on the design, when the antenna is used as a room antenna and should not take up much space, so as not to disturb the appearance.
  • the side edges 4 of the acute-angled triangle 3 have an at least once pointed course, wherein the pointed course is formed by side edges 5, 6 or in the case of repeated pointed course also by side edges 7, 8.
  • the side edges go 5, 6 and 7 respectively , 8 from the (partially dotted line) side edge 4, where they do not have to go out exactly from the side edge 4, but also directly adjacent to their vicinity.
  • the antenna structure is mirror-symmetrical with respect to a basic axis 9 of the triangle 3 shown in dashed lines, with an elliptical antenna structure resulting in the antenna structure shown in FIG. 4 due to the twice pointed shape. It has been found that this angular antenna structure for the applicable frequency range not only the required constant gain and above In addition, has the required good adaptation, but also has a compared to known antennas unusual, very high profit.
  • FIG. 5 shows that a tip of the triangle 3 forms a base point 10 of the antenna.
  • a tip of the triangle 3 forms a base point 10 of the antenna.
  • a ground surface 11 is arranged.
  • the antenna structure shown in FIG. 5 and its associated ground plane consist of a conductive copper which is arranged on a circuit board (non-conductive support structure).
  • a circuit board non-conductive support structure
  • Such an antenna can still be provided with a protective surface (for example, be overmolded with plastic) or arranged in a housing.
  • FIG. 6 shows an antenna structure, as already shown in FIG. 5, with the same reference numbers and explanation.
  • the antenna structure shown in Figure 6 on the non-conductive support structure (board) on another foot 13, via an electrical connection 14 and with the conductor 12, for example, with the arranged on the board socket (not shown) is connected.
  • This further base point 13 serves for a further antenna, in particular a rod-shaped antenna 15, to be connected for a further frequency range, in particular band III.
  • This further antenna may be arranged, for example, on the non-conductive support structure or starting from the further base 13 as a rod-shaped structure detached from the non-conductive support structure.
  • the latter alternative has the advantage that the antenna 15 can be aligned independently of the rest of the antenna structure via a corresponding connection (for example ball joint) in the region of the further foot point 13.
  • a conductive region 16 and a nonconductive region 17 are present in parallel or approximately parallel to the side edges 5, 6 and / or 7, 8.
  • This conductive region may be formed on the non-conductive support structure (board) or as a separate component (for example wire bridge). Measurements have shown that the conductive center region (as shown, for example, in FIG. 5) between the side edges 5 to 8 is low-current and thus contributes only insignificantly to the function of the antenna structure. Therefore, it is sufficient if the regions which are present approximately parallel to the side edges 5 to 8 are designed as conductive regions which are current-carrying. The resulting intermediate region (non-conductive region 17) remains free or can be used for the arrangement of the antenna 15.
  • the electrically effective innovation based on the fact that the basic structure is a self-similar structure whose final dimensions adapted to the special compact dimensions resulting from the available space and frequency range to be applied, and decisively changed from a purely self-similar structure is. That is, the antenna structure is useful only with these particular radiator and mass dimensions. Their shape is thus a structure optimized to the parameters mentioned above, which obtains their effectiveness from the inventive combination of a modified self-similar structure and the possible deviations from this in favor of the mechanical size.
  • the basic principle of the antenna is a spotlight, which is built three times, each time with different size.
  • the shape of the single radiator is a spearhead, which alone is characterized by a good broadband.
  • the structure is constructed from a triangle and pentagon intersection, with the resulting structure retaining approximately the properties of a purely self-similar radiator.
  • the dimensions are optimized without losing the broadband effect.
  • a construction on a board is possible, which is much smaller than the previous antennas with comparable electrical properties.
  • This antenna can be easily installed in an upright case, making it easy to use as a vertically polarized indoor antenna.
  • it is excellent as a portable DVB-T antenna.
  • the signal is supplied from the radiator base (lower tip of the elbow) to the socket to which the coaxial cable is attached, thereby realizing an asymmetrical parallel line.
  • the ground plane is split in order to prevent formation of individual surfaces with different currents, the two mass parts are electrically connected by wire bridges, so that the bridge is located above the parallel wire line.
  • the structure of the ground plane 11 is important. Although it is not self-similar, but can not be changed arbitrarily, without the antenna radiates worse.
  • the ground plane 11 thus represents an optimal utilization of the very small available area, but their electrical function is ensured.
  • the mass (ground surface 11) as a counterweight to the radiator must be large. Otherwise, the antenna looks for the ground on the connection cable. Therefore, sheath waves propagate on the connected feeder cable in this antenna, which must be eliminated by a standing wave barrier or at least kept away from the cable.
  • the standing wave barrier can be realized by a ferrite on the feed cable, the socket of the antenna or by a ferrite on a piece of coaxial cable, which replaces a part of the parallel wire line. She can also go through a printed circuit of inductance and capacitor can be realized on the non-conductive support structure.
  • an antenna amplifier for example consisting of SMD components, within the area of the antenna ground between the antenna (antenna structure), which can also be realized there.

Landscapes

  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Waveguide Aerials (AREA)

Claims (9)

  1. Antenne avec une structure d'antenne électroconductrice et le cas échéant une structure de support non électroconductrice, la structure d'antenne présentant la forme de base d'un triangle acutangle (3) dont les bords latéraux (7) ont un tracé doté d'au moins une pointe, une pointe du triangle (3) formant un pied (10) de l'antenne, les bords latéraux (8) partant du pied (10), s'écartant par rapport à un axe principal (9) et se raccordant à leur extrémité avec les bords latéraux (7) orientés vers l'intérieur en direction de l'axe principal (9), caractérisée en ce qu'il est prévu autour du pied (10) une surface de masse (11) qui s'étend jusqu'au premier bord latéral (7) orienté vers l'intérieur.
  2. Antenne selon la revendication 1, caractérisée en ce que le tracé doté de pointes est formé par des bords latéraux (5, 6) ou selon le cas (7, 8) qui partent du bord latéral (4) ou de près du bord latéral (4).
  3. Antenne selon la revendication 1 ou 2, caractérisée en ce que la structure d'antenne est symétrique en miroir par rapport à l'axe principal (9) du triangle (3).
  4. Antenne selon l'une quelconque des revendications précédentes, caractérisée en ce que la structure d'antenne est hendécagonale.
  5. Antenne selon l'une quelconque des revendications précédentes, caractérisée en ce que la structure d'antenne est faite de cuivre conducteur appliqué sur une platine constituant la structure de support.
  6. Antenne selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une région conductrice (16) est présente sensiblement parallèlement aux bords latéraux (5, 6) et/ou (7, 8) et une région non conductrice (17) entre eux.
  7. Antenne selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une autre antenne, en particulier une antenne tige (15), est présente pour une autre plage de fréquence, en particulier la bande III.
  8. Antenne selon l'une quelconque des revendications précédentes, caractérisée en ce que l'antenne présente un bloqueur d'ondes de surface intégré.
  9. Antenne selon l'une quelconque des revendications précédentes, caractérisée par son utilisation pour recevoir des signaux terrestres tels que des signaux DVB-T.
EP03009090A 2002-05-10 2003-04-19 Antenne en forme polygonale Expired - Lifetime EP1361624B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10220670 2002-05-10
DE10220670 2002-05-10

Publications (2)

Publication Number Publication Date
EP1361624A1 EP1361624A1 (fr) 2003-11-12
EP1361624B1 true EP1361624B1 (fr) 2007-05-30

Family

ID=29225113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03009090A Expired - Lifetime EP1361624B1 (fr) 2002-05-10 2003-04-19 Antenne en forme polygonale

Country Status (4)

Country Link
EP (1) EP1361624B1 (fr)
AT (1) ATE363744T1 (fr)
DE (1) DE50307351D1 (fr)
ES (1) ES2287382T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013012776A1 (de) * 2013-08-01 2015-02-05 Sebastian Schramm Empfangsantenne

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005094437A (ja) * 2003-09-18 2005-04-07 Mitsumi Electric Co Ltd Ｕｗｂ用アンテナ
JP3964382B2 (ja) * 2003-11-11 2007-08-22 ミツミ電機株式会社 アンテナ装置
DE102004040401A1 (de) * 2004-08-19 2006-03-09 Hirschmann Electronics Gmbh & Co. Kg Antennenanordnung zum Empfangen terrestrischer Hochfrequenzsignale mit zumindest zwei Antennen
DE102004040420A1 (de) * 2004-08-19 2006-03-09 Hirschmann Electronics Gmbh & Co. Kg Antennenanordnung zum Empfangen terrestrischer Hochfrequenzsignale
WO2006028212A1 (fr) * 2004-09-10 2006-03-16 Murata Manufacturing Co., Ltd. Antenne de type implémentation en surface et appareil de communication équipé de celle-ci
DE102005030241A1 (de) 2005-03-08 2006-12-14 Hirschmann Electronics Gmbh DVB-T-Antenne mit zwei verschiedenen Antennenstrukturen für VHF/UHF
DE102005030240A1 (de) * 2005-03-08 2006-09-14 Hirschmann Electronics Gmbh DVB-T-Antenne für VHF/UHF und einem Gelenk
FR2975536A1 (fr) * 2011-05-17 2012-11-23 Ier Antenne pour dispositifs d'identification rfid.
DE102013014170B4 (de) * 2013-08-26 2023-11-02 Sebastian Schramm Breitbandige Empfangsantenne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828340A (en) * 1996-10-25 1998-10-27 Johnson; J. Michael Wideband sub-wavelength antenna
US6157344A (en) * 1999-02-05 2000-12-05 Xertex Technologies, Inc. Flat panel antenna
JP4012733B2 (ja) * 1999-09-20 2007-11-21 フラクトゥス・ソシエダッド・アノニマ マルチレベルアンテナ
FI113103B (fi) * 1999-11-03 2004-02-27 Co Jot Oy Levyantenni

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013012776A1 (de) * 2013-08-01 2015-02-05 Sebastian Schramm Empfangsantenne

Also Published As

Publication number Publication date
ES2287382T3 (es) 2007-12-16
EP1361624A1 (fr) 2003-11-12
ATE363744T1 (de) 2007-06-15
DE50307351D1 (de) 2007-07-12

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