EP1569297B1 - Ultrabreitbandige V-UHF antenna - Google Patents

Ultrabreitbandige V-UHF antenna Download PDF

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Publication number
EP1569297B1
EP1569297B1 EP05101169.0A EP05101169A EP1569297B1 EP 1569297 B1 EP1569297 B1 EP 1569297B1 EP 05101169 A EP05101169 A EP 05101169A EP 1569297 B1 EP1569297 B1 EP 1569297B1
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EP
European Patent Office
Prior art keywords
frequency
band
radiating
elements
radiating element
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.)
Active
Application number
EP05101169.0A
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English (en)
French (fr)
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EP1569297A1 (de
Inventor
Frédéric THALES Intellectual Prop. Ngo Bui Hung
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Thales SA
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Thales SA
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Priority to PL05101169T priority Critical patent/PL1569297T3/pl
Publication of EP1569297A1 publication Critical patent/EP1569297A1/de
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Publication of EP1569297B1 publication Critical patent/EP1569297B1/de
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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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/20—Two collinear substantially straight active elements; Substantially straight single active elements
    • H01Q9/22—Rigid rod or equivalent tubular element or elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H01Q21/10—Collinear arrangements of substantially straight elongated conductive units
    • 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
    • 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
    • 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

Definitions

  • the invention relates to an antennal system with a very wide band operating in transmission as in reception without adaptation. It is intended for example for the frequency band varying from 30 to 512 MHz, VHF very high frequencies (in English Very High Frequencies) to UHF ultra high frequencies (Ultra High Frequencies).
  • This band encompasses in particular conventional bands: the usual VHF-FM band, or VHF frequency modulation of 30 to 88 MHz (or VHF-Frequency Modulation), the VHF-AM or VHF band amplitude modulation of 100 to 160 MHz (in English VHF - Amplitude Modulation) and the UHF-AM band of 225 to 400 MHz (UHF - Amplitude Modulation).
  • Modern transceiver (E / R) stations are likely to operate in all frequency bands from 30 to 512 MHz.
  • the existing antenna systems associated with them in particular those intended to be installed on mobile phones, ensure optimal operation only by sub-frequency bands, for example, the VHF-FM band (30-88 MHz). or the VHF-AM band (100-160 MHz) or the UHF-AM band (225-400 MHz). Therefore, the operation of these transceivers requires the implementation of several antennas and a switching device to select the most suitable antenna.
  • Wide-band antennas for seamless coverage of the entire 30 to 512 MHz band already exist for other radio-frequency systems, such as antennas for aircraft radiocommunication, antennal systems for listening and jamming in electronic warfare, etc.
  • these antennas have drawbacks that make them unsuitable for use on a land mobile. Indeed, they have either an efficiency too low for the requested radio range for the ground-ground links, case antennas embedded on aircraft, or a footprint incompatible with the dimensions of the vehicle.
  • Licences DE 3 826 777 or FR 2 758 012 propose so-called multi-band structures, which cover several frequency bands and which do not have the defects previously stated. However, the frequency bands covered by these types of antennas must be disjoined.
  • the patent US 6,177,911 discloses an antenna for use in a base station used for the mobile radio.
  • the antenna consists of several elements operating in the same frequency ranges.
  • the idea of the present invention is to propose a single antenna capable of operating without discontinuity at least in the entire frequency band of 30 to 512 MHz, ie in more than a decade, and having dimensions such that it can be installed in place of a conventional VHF-FM radiocommunication antenna, that is to say in the form of a whip while having a sufficient performance to ensure radio ranges at least equivalent to those of existing equipment.
  • a representation of such an antenna is schematized on the figure 1 .
  • the whip has a height for example of the order of 3 meters.
  • the invention relates to a broadband antenna system capable of radiating or receiving radio frequency signals in a given frequency band, comprising at least two substantially collinear radiating elements. It is characterized in that each of the two elements radiates in a frequency band, a first radiating element operating in the frequency band [Fhinf, Fhsup], a second radiating element operating in the band [Fminf, Fmsup], and in that that the first radiating element and the second radiating element are adapted so that, at the hinge frequencies, these two elements involved in the radiation, the system comprises a third radiating element operating in the frequency band [Fbinf, Fbsup], the frequency Fbsup is for example greater than or equal to the frequency Fminf, and the frequency Fmsup is for example greater than or equal to the frequency Fhinf, the radiating elements are connected to a power supply network comprising an input and three outputs respectively connected to the first, second and third elements by three transmission lines, the supply network comprises at least one band-pass filter, a duplexer whose du
  • the figure 1 represents an example of antenna A installed on a vehicle V.
  • This antenna consists for example of a radiating element 1 which is in the form of a whip, a base 2 which allows to fix the antenna on the carrier vehicle and which usually comprises a power supply network allowing maximum transfer of power from the transceiver to the radiator assembly 1.
  • a flexible element 3 is interposed at its base. This flexible element known to those skilled in the art will not be detailed for reasons of simplification.
  • the first dipole 11 placed at the top of the radiating assembly 1 is designed to operate in the upper part [Fhinf at Fhsup] of the useful band, for this example of 200 to 512 MHz.
  • the matching circuit and bandwidth widening devices known to those skilled in the art to grant this dipole in the band 200 to 512 MHz are not detailed.
  • the second dipole 12 placed below the first dipole covers the adjacent band [Fminf to Fmsup] from 100 to 200 MHz. For the same reason, its adaptation circuit is not described.
  • the monopole 13 located in the lower part of the antenna ensures operation in the low band [Fbinf Fbsup] from 30 to 100 MHz.
  • the choice of a monopole type structure can be replaced by a dipolar structure. Monopoly makes it possible to obtain a more limited antenna size.
  • This arrangement thus allows the radiating assembly 1 to operate from the lowest frequency Fbinf (in the example given at 30 MHz) to the highest frequency Fhsup (in this example 512 MHz) without hinge frequencies (Fhinf, Fmsup) and (Fminf, Fbsup) the radiation is disturbed thus prohibiting the use of these frequencies as in antennas known from the prior art.
  • the figure 3a represents an embodiment of an antenna according to the invention and the figure 3b a corresponding sectional view.
  • openings are arranged expressly to the figure 3a in certain elements composing the antenna.
  • the dipoles are skirt dipoles, the references 11, 12, 13 of the figure 2 having been kept for reasons of simplification.
  • the antenna comprises a first skirt 11 dipole located in its upper part, a second skirt 12 dipole collinear or substantially colinear to the first and a monopole 13 placed at the bottom of the antenna.
  • the skirted dipole 11 consists of a first radiating element 11a, which can be produced from a tubular section and a second radiating element 11b which is made from a hollow tubular element of length substantially identical to the length of the element 11a and wherein is fed the power cable 21 of the antenna.
  • These two radiating elements are fed at point 11c by connecting the upper end of the core 21a ( Fig.3b ) of the coaxial supply cable 21 at the base of the element 11a and by connecting the shield 21b ( Fig.3b ) of this cable 21 at the periphery of the upper end 11bs of the element 11b to form what is usually referred to as a skirt.
  • an impedance matching quadrupole may be interposed at the point 11c.
  • the theoretical length of the quarter-wave in meters is given by the known relation 300 / 4F (Mhz) is 0.375 meters in this example, where F is the frequency expressed in MHz .
  • the colinear skirt dipole 12 is for example composed of a skirt or inverted skirt 12a and a skirt 12b, which together constitute the two radiating elements of the dipole.
  • a skirt 12d having the role of an insulation device usually designated by the word "stub" is interposed between these two elements.
  • the periphery of the upper end 12ds of the skirt 12d is connected to the shield 21b, while its other end 12di is connected to the lower part of the skirt 12a.
  • the supply of this dipole is carried out at level 12c in connecting the upper end of the core 22a of the coaxial supply cable 22 to the lower edge of the isolation device 12d at point 12e and connecting the shield 22b of this cable 22 and the shield 21b of the cable 21 around the upper end 12bs of the skirt 12b.
  • an impedance matching quadrupole it is possible to use an impedance matching quadrupole.
  • this monopole 13 of the ground plane M above which the antenna is installed the cables 21 and 22 are wound around a core of known magnetic material 24, such as ferrite, powder iron, etc.
  • a core of known magnetic material 24 such as ferrite, powder iron, etc.
  • the supply of this monopole is performed by connecting the upper end of the core 23a of the cable 23 to one of the turns of the winding 25 at the point 26 determined to obtain the best impedance matching in the frequency band [Fbinf at Fbsup ].
  • insulation devices acting as a shock-inductor such as devices based on ferrite beads, toroids or tubes of ferrite are interposed between these elements.
  • the shields 21b, 22b, 23b and the ground of the supply network 14, are connected thereto by the connection assembly 30.
  • the lower ends of the cores of the coaxial cables 21, 22 and 23 are respectively connected to the outputs 16, 17 and 18 of the supply network 14, an exemplary embodiment of which is detailed in FIG. figure 4 .
  • the radio frequency signal from the input 15 is divided in two by a hybrid 27 to the two channels 27a and 27b.
  • the first channel 27a is filtered by a bandpass filter [Fminf - Fmsup] 28, for the exemplary embodiment [100MHz - 200MHz] and constitutes after filtering the output 17.
  • the other channel 27b is separated by a duplexer 29 into two sub-bands, one low [Fbinf - Fbsup] or [30MHz - 100MHz] for the exemplary embodiment and the other high [Fhinf - Fhsup], ie [200MHz - 512MHz].
  • the low sub-band is connected to the output 18 and the high sub-band is connected to the output 16.
  • FIG. 1 to 4 also applies to a broadband antenna capable of radiating or receiving radio frequency signals in a frequency band [Fminf, Fhsup], comprising two substantially collinear radiating elements (11, 12).
  • the radiating element (11) operates in the frequency band [Fhinf, Fhsup]
  • the radiating element (12) operates in the band [Fminf, Fmsup], and at the hinge frequencies between these two elements they both participate in the radiation.
  • the frequency Fmsup is greater than or equal to the frequency Fhinf.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Claims (6)

  1. Breitbandantennensystem, das Funkfrequenzsignale in einem gegebenen Frequenzband abstrahlen oder empfangen kann, umfassend wenigstens zwei im Wesentlichen kollineare Strahlungselemente (11, 12), dadurch gekennzeichnet, dass jedes der beiden Elemente (11, 12) in einem Frequenzband abstrahlt, wobei das erste Strahlungselement (11) im Frequenzband von Fhinf bis Fhsup arbeitet, wobei das zweite Strahlungselement (12) im Band von Fminf bis Fmsup arbeitet, und dadurch, dass das erste Strahlungselement (11) und das zweite Strahlungselement (12) so abgestimmt sind, dass an den Übergangsfrequenzen zwischen zwei benachbarten Elementen diese beiden Elemente an der Strahlung beteiligt sind, wobei das System ein drittes Strahlungselement (13) umfasst, das im Frequenzband von Fbinf bis Fbsup arbeitet, wobei die Frequenz Fbsup gleich oder größer ist als die Frequenz Fminf und wobei die Frequenz Fmsup gleich oder größer als die Frequenz Fhinf ist, wobei die Strahlungselemente (11, 12, 13) mit einem Stromversorgungsnetz (14) verbunden sind, das einen Eingang (15) und drei Ausgänge (16, 17, 18) umfasst, die jeweils mit den Elementen (11, 12, 13) durch drei Übertragungsleitungen (21, 22, 23) verbunden sind, wobei das Stromversorgungsnetz (14) wenigstens ein Bandpassfilter (28), einen Duplexer (29), dessen Duplexlücke dem Band des Filters (28) entspricht, und einen Hybrid-3dB-Leistungsteiler (27) umfasst.
  2. Antennensystem nach Anspruch 1, dadurch gekennzeichnet, dass die Längen der Übertragungsleitungen (21, 22, 23) so gewählt sind, dass die RF-Signale bei den Frequenzen von Fhinf bis Fmsup die ersten und zweiten Strahlungselemente (11, 12) phasengleich speisen, und dadurch, dass die RF-Signale bei den Frequenzen von Fminf bis Fbsup das zweite und das dritte Strahlungselement (12, 13) phasengleich speisen.
  3. Antennensystem nach Anspruch 2, dadurch gekennzeichnet, dass bei Frequenzen von Fhinf bis Fmsup das erste Strahlungselement (11) in Halbwellen abstrahlt.
  4. Antennensystem nach Anspruch 2, dadurch gekennzeichnet, das bei den Frequenzen von Fminf bis Fbsup das zweite Strahlungselement (12) in Halbwellen abstrahlt.
  5. System nach Anspruch 2, dadurch gekennzeichnet, dass das zweite Element (12) für Fhinf bis Fmsup in Vollwellen abstrahlt und das dritte Element (13) für Fminf bis Fbsup in Vollwellen abstrahlt.
  6. System nach Anspruch 1, dadurch gekennzeichnet, dass das erste und zweite Strahlungselement (11, 12) Dipole sind und das dritte Strahlungselement (13) ein Monopol ist.
EP05101169.0A 2004-02-27 2005-02-16 Ultrabreitbandige V-UHF antenna Active EP1569297B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05101169T PL1569297T3 (pl) 2004-02-27 2005-02-16 Antena o bardzo szerokim paśmie V-UHF

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0402039A FR2866988B1 (fr) 2004-02-27 2004-02-27 Antenne a tres large bande v-uhf
FR0402039 2004-02-27

Publications (2)

Publication Number Publication Date
EP1569297A1 EP1569297A1 (de) 2005-08-31
EP1569297B1 true EP1569297B1 (de) 2013-12-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05101169.0A Active EP1569297B1 (de) 2004-02-27 2005-02-16 Ultrabreitbandige V-UHF antenna

Country Status (5)

Country Link
US (1) US7183992B2 (de)
EP (1) EP1569297B1 (de)
ES (1) ES2446989T3 (de)
FR (1) FR2866988B1 (de)
PL (1) PL1569297T3 (de)

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GB2466585B (en) * 2007-08-31 2012-07-11 Allen Vanguard Corp Radio antenna assembly
DE102009015699A1 (de) 2008-10-30 2010-05-06 Rohde & Schwarz Gmbh & Co. Kg Breitband-Antenne
FR2944650B1 (fr) * 2009-04-15 2012-10-05 Imra Europ Sas Antenne multi-services a bande ultralarge.
FR2944917B1 (fr) * 2009-04-24 2012-07-13 Thales Sa Antenne multiplie large bande a faible profil
CA2666896A1 (en) * 2009-05-27 2010-11-27 Valcom Manufacturing Group Inc. Multiple-band collinear dipole antenna
WO2012150924A1 (en) * 2011-05-02 2012-11-08 R.A. Miller Industries, Inc. Strengthening means for a dipole whip antenna
KR101309467B1 (ko) * 2011-09-29 2013-09-23 삼성전기주식회사 다이폴 안테나
IN2015DN00929A (de) * 2012-08-07 2015-06-12 Comrod As
US9608336B1 (en) * 2015-08-25 2017-03-28 Edison Fong Radial-free collinear omni-directional triband half wavelength antenna with virtual ground, single coaxial cable feedpoint, and with minimal interaction of adjustment between bands
US10497240B2 (en) * 2017-05-23 2019-12-03 Sensormatic Electronics, LLC Systems and methods for providing a pedestal with collision damage protection
US10776595B2 (en) 2017-09-29 2020-09-15 Sensormatic Electronics, LLC Anti-theft pedestal suspension system
CN110429940B (zh) * 2019-07-29 2024-07-09 中国电子科技集团公司第七研究所 一种基于超宽带天线的全频段电磁频谱监测系统
CN114284704A (zh) * 2021-12-30 2022-04-05 上海鸿晔电子科技股份有限公司 超宽带天线和通信系统
CN115832707A (zh) * 2022-12-16 2023-03-21 上海海积信息科技股份有限公司 一种多频段天线
CN117691351B (zh) * 2024-02-01 2024-05-14 西南科技大学 一种加载串行配置滤波条带的宽带滤波圆极化天线

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Also Published As

Publication number Publication date
FR2866988A1 (fr) 2005-09-02
US7183992B2 (en) 2007-02-27
EP1569297A1 (de) 2005-08-31
PL1569297T3 (pl) 2014-05-30
FR2866988B1 (fr) 2006-06-02
ES2446989T3 (es) 2014-03-11
US20050253768A1 (en) 2005-11-17

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