EP1349235A1 - Dualband- Antennensystem für VHF/UHF - Google Patents

Dualband- Antennensystem für VHF/UHF Download PDF

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Publication number
EP1349235A1
EP1349235A1 EP03100746A EP03100746A EP1349235A1 EP 1349235 A1 EP1349235 A1 EP 1349235A1 EP 03100746 A EP03100746 A EP 03100746A EP 03100746 A EP03100746 A EP 03100746A EP 1349235 A1 EP1349235 A1 EP 1349235A1
Authority
EP
European Patent Office
Prior art keywords
antenna
line
uhf
frequency band
duplexer
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.)
Granted
Application number
EP03100746A
Other languages
English (en)
French (fr)
Other versions
EP1349235B1 (de
Inventor
Fréderic Thales Ngo Bui Hung
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.)
Thales SA
Original Assignee
Thales SA
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 Thales SA filed Critical Thales SA
Priority to SI200330820T priority Critical patent/SI1349235T1/sl
Publication of EP1349235A1 publication Critical patent/EP1349235A1/de
Application granted granted Critical
Publication of EP1349235B1 publication Critical patent/EP1349235B1/de
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
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
    • 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
    • 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
    • H01Q9/18—Vertical disposition of the antenna

Definitions

  • VHF Very High Frequencies
  • Figure 1 is an example of antenna A installed on a V.
  • the antenna is essentially composed of an element radiating upper 1 and a lower radiating element 2, which are both powered by a feeding device.
  • fixing base 5 usually provided with a spring 6 to protect the antenna accidental impacts against obstacles, allows the installation of it on the vehicle.
  • the lower radiating element 2 is normally equipped to its lower end of a current blocker 3, usually designated in Anglo-Saxon language by the expression "RF cable choke".
  • Modern transceivers operating through example in the frequency band 30 to 88 MHz have on time of a service road that uses other frequencies, in particular the frequencies of the UHF band (Ultra High Frequencies) from 2.4 to 2.5 GHz.
  • Radiant elements 1 and 2 of the antenna broadband which have a length dimensioned for the VHF band from 30 to 88 MHz, typically a length of the order of 1.6 meters, are not not suitable for proper operation at UHF frequencies from 2.4 to 2.5 GHz. These last require radiating elements of dimension about thirty times smaller.
  • the solution currently adopted is to provide an antenna additional A 'dedicated to this UHF channel as it is represented at the Figure 2a.
  • An example of an installation synoptic of this solution is shown in Figure 2b where is schematized a transceiver station 7 feeding a VHF antenna, A and a UHF antenna, A 'through a duplexer 8 whose role is to separate VHF frequencies and frequencies UHF and direct them to their respective antennas.
  • Fbb, Fbh low frequency frequency
  • Fhb, Fhh high frequency frequency band
  • the feeding device is for example connected to a station transceiver by means of a transmission line and the element radiating lower is for example constituted of a section of the line of transmission and the antenna assembly has at least one element radiating hollow arranged around the stretch.
  • the system may have several hollow elements connected between them and in series by means of line portions, the soul of a connecting portion the upper end of the hollow element indexed i at the lower end of the element indexed i + 1 and the shielding of the portion of line indexed i is connected to the coaxial line, for example the shielding of the line.
  • a duplexer is for example arranged at the level of the part lower part of the antenna assembly and is connected to at least one hollow element and to the line section.
  • the system is for example used for radio signals frequencies.
  • Figure 3 shows the block diagram of a next antenna the invention intended to function in particular in the two bands of VHF frequencies from 30 to 88 MHz and UHF from 2.4 to 2.5 GHz.
  • the antenna is in this example installed on a vehicle.
  • the distance between the feed device 4 and the blocker current 3 is for example of the order of 1.6 meters.
  • Mass M of vehicle is taken in this embodiment as a common mass to the whole system.
  • the coaxial transmission line 9 is for example composed of several sections. These sections are connected together using, for example, known and not shown devices, such as coaxial connectors male and female, etc.
  • the fixing base 5 and its spring 6, the means mechanical devices that make the antenna of the latter or the elements annexes (such as radome, connectors, etc.) that provide rigidity and the assembly of the constituents will not be detailed because they are not necessary to understand the invention.
  • the current blocker 3 (adapted to the VHF) whose function is to delimit radioelectrically the section 9 1 of the coaxial transmission line 9, is carried out for example according to the techniques known to those skilled in the art.
  • the implementation of a skirt around the coaxial transmission line or the winding of this line around a ferrite core, etc. will not be detailed for the sake of clarity.
  • the upper radiating element 1 and the lower radiating element 2 constitute, for example, the two strands of a dipole sized for radiate in the VHF frequency band, for example throughout the band 30 to 88 MHz. They are powered through the feeder 4 which realizes impedance matching to allow maximum transfer of RF power (radio frequency) brought by the transmission line coaxial 9. This is true throughout the 30-88 MHz frequency band.
  • An exemplary embodiment of the feed device 4 is shown schematically in FIG. figure 5.
  • FIG. 4 is a sectional view of an exemplary embodiment of the antenna assembly 10, where the line section 9 1 is interrupted to have for example a duplexer 8, thus leading to a lower part of the section and an upper part. of the section.
  • the ends of the interrupted section are referenced 9 11 and 9 12 .
  • the upper end 9 11 of the lower part of the section 9 1 is provided with a current blocker 11 sized for the UHF frequencies.
  • This current blocker has the particular function of isolating the signals of the UHF band while remaining transparent to the signals of the VHF band.
  • the technique for producing this current blocker is, for example, a quarter-wave skirt known to those skilled in the art.
  • a skirt body 11 1 of tubular shape surrounds the section 9 1 of the coaxial line, the lower edge 11 2 of this skirt body is short-circuited by a cover 11 4 to the shield 9 B of the coaxial line while the edge upper 11 3 is left open to provide the current blocking function.
  • duplexer-adapter 8 Between the lower part of the section and the upper part is arranged a duplexer-adapter 8.
  • the connection of the duplexer-adapter 8 to the ends 9 11 and 9 12 is effected for example by connecting the shielding of these ends to the common ground 12 of the duplexer-adapter 8 and by connecting the cores of the ends 9 11 and 9 12 of this line coaxial respectively to the input terminal 8 1 and the output terminal 8 2 of the VHF channel of the duplexer-adapter 8.
  • This duplexer- The adapter comprises a low-pass filter 13 which behaves as a direct connection between the input terminals 8 1 and 82 for the VHF signals and an open circuit for the UHF signals.
  • the high-pass filter 14 of the duplexer-adapter behaves as a direct connection between the input terminal 8 1 and the output terminal 8 3 of the UHF channel for the UHF signals which are thus taken from the input terminal 8 1 to be brought up to the output terminal 8 3 .
  • the length L of these elements is for example of the order of the average half-wavelength corresponding to the UHF band.
  • the elements have, for example, substantially identical lengths. Insulating parts used to maintain the coaxial line in the cylindrical tubes or to ensure the assembly and rigidity of the assembly are not detailed because they are known to those skilled in the art.
  • the radiating elements 15i are connected to each other by means of portions 16i of coaxial line, for example they are coupled in series. The length of a portion 16i is substantially equal to the half-average wavelength corresponding to the UHF band.
  • the core 17i of a portion 16i connects the upper end 15 i2 of the element 15 i to the lower end 15 (i + 1) 1 of the element 15 (i + 1) .
  • the web 17 1 1 line 16 connects the upper portion 15, 12 of the lower member end 15 1 to the lower end 15, 21 of the element 15 2 and the web 17 2 of the portion line 16 2 connects the upper end 22 of the element 2 to the lower end 31 of the element 3 .
  • the shields 18 1 and 18 2 of the line portions 16 1 and 16 2 are electrically connected, for example, to the shield of the coaxial line 9 1 .
  • the radiating assembly consisting for example of cylindrical tubes 15 1 , 15 2 and 15 3 and connecting portions 16 1 and 162 is supplied with RF power of the UHF band by connecting the lower end 11 of the cylindrical hollow element 15 1 closest to the duplexer-adapter to the output terminal 8 3 of the duplexer-adapter.
  • a cover 19 is placed for example towards the middle of the upper tube 3 to short circuit the latter to the shielding of the coaxial line.
  • a quarter-wave skirt 20 of the type in the lower part is thus formed to act as a current blocker for the UHF signals.
  • the number of cylindrical tubes is chosen in particular depending on the directivity desired for the UHF antenna. Without leaving the frame of the invention, the structure of the antenna described also applies for antennas operating in other frequency bands, while respecting the condition that these frequency bands are not adjacent. Any hollow element whatever its shape can be used as a radiating element.
  • FIG. 5 depicts an example of a feed device 4. This last has an impedance transformer 21 whose output 22 of its secondary winding 23 is connected to the upper radiating element 1.
  • the primary winding 24 of this step-up transformer is connected to the connection point 25 to the core of the transmission line 9 to through a parallel LC circuit 26 consisting of an inductor 27 and a capacitor 28, followed by a series LC circuit 29 consisting of an inductor 30 and 31.
  • the mass of this matching circuit is connected to the shield from the coaxial transmission line 9 to the connection point 32.
  • the value of the transformer transformation ratio 21 and the values of the inductances 27, 30 and capacitors 28, 31 are determined so that the impedance presented between connection points 25 and 32 is the most possible close to the usual characteristic impedance of 50 ohms for all frequencies in the band 30 to 88 MHz.
  • FIG. 6 details an embodiment of the duplexer-adapter.
  • the low-pass filter 13 is provided by a portion 33 of coaxial line of which a first end 34 is short-circuited (that is to say that the core and the shield of the coaxial line are connected together) and constitutes the terminal 8 2 and whose opposite end 35 has its soul connected to the terminal 8 1 and its shielding left free.
  • the high-pass filter 14 is provided by a portion 36 of coaxial line whose shield 37 from its upper end constitutes the terminal 8 3 and whose core 38 of the other end is connected to the terminal 8 1 .
  • the lengths of the portions 33 and 36 are of the order of magnitude of the quarter of the average wavelength corresponding to the UHF band and are adjusted to allow the impedance matching of the antenna assembly 10 according to the invention to UHF frequencies used.
  • FIG. 7 represents another variant embodiment of the invention.
  • the antenna according to the invention has here two separate accesses allowing the connection of two transceiver stations 7 1 and 7 2 operating one in the VHF band of 30 to 88 MHz and the other in the UHF band of 2, 4 to 2.5 GHz.
  • the station 7 1 of the VHF band is for example connected to the supply device 4 by the coaxial transmission line 9 which passes through the current blocker 3 and an antenna assembly 10 '.
  • the station 7 2 of the UHF band is for example connected to the radiating elements 15i of the antenna assembly 10 'by the section 9' 1 of the coaxial secondary transmission line 9 'which passes through the current blocker 3.
  • This antennal assembly 10 ' does not include a duplexer-adapter unlike the antenna set given in the previous example.
  • the section 9 1 of coaxial line remains uninterrupted between the current blocker 3 and the supply device 4.
  • the supply of the tubular radiating elements 15i is made by connecting the lower end 15 11 of the element 15 1 nearest of the section of line 9 ' 1 , to the core 9' A of this section 9 ' 1 whose shielding 9' B is integral with that of the section 9 1 of the coaxial line 9.
  • the shields of the sections of lines 9 1 and 9 ' 1 behave radioelectrically as a single shield when passing through the current blockers 3 and 11.
  • the other end of the secondary coaxial line is connected to the station 7 2 transceiver of the UHF band.
  • FIGS. 9 and 10 schematize an alternative embodiment described in FIGS. 7 and 8 where the two emitters 7 1 and 7 2 are replaced by a single emitter 7 which directly supplies the transmission line 9.
  • This line is interrupted so as to position a duplexer 8 in a manner similar to that described in Figure 4.
  • This duplexer feeds the two line sections 9 1 and 9 ' 1 which were detailed in Figures 7 and 8.
  • FIG. 10 shows in detail the connection between the duplexer 8 and the line sections 9 1 and 9 ' 1 .
  • the connection of the duplexer-adapter 8 to the ends 9 11 and 9 12 of the interrupted line section 9 1 is carried out for example by connecting the shielding of these ends to the common ground 12 of the duplexer-adapter 8 and connecting the ends of the cores 9 11 and 9 12 of this line coaxial respectively to the input terminal 8 1 and the output terminal 8 2 of the VHF channel of the duplexer-adapter 8.
  • the secondary line 9 ' 1 the latter is in connection with the exit 8 3 of the UHF channel.
  • This duplexer-adapter comprises a low-pass filter 13 which behaves as a direct connection between the input terminals 8 1 and 8 2 for the VHF signals and an open circuit for the UHF signals.
  • the high-pass filter 14 of the duplexer adapter behaves as a direct connection between the input terminal 8 1 and the output terminal 8 3 of the UHF channel for the UHF signals which are thus taken from the input terminal 8 1 to be brought to the terminal output 8 3 to supply the line section 9 ' 1 .
  • the current blocker 11 sized for the UHF frequencies is located on the two transmission lines 9 1 and 9 ' 1 and above the duplexer. It has characteristics identical or substantially identical to those given in Figure 4 and in fact will not be detailed.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
EP03100746A 2002-03-26 2003-03-24 Dualband- Antennensystem für VHF/UHF Expired - Lifetime EP1349235B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200330820T SI1349235T1 (sl) 2002-03-26 2003-03-24 Dvopasovni antenski sistem VHF/UHF

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0203765 2002-03-26
FR0203765A FR2837988B1 (fr) 2002-03-26 2002-03-26 Systeme antennaire bi-bande vhf-uhf

Publications (2)

Publication Number Publication Date
EP1349235A1 true EP1349235A1 (de) 2003-10-01
EP1349235B1 EP1349235B1 (de) 2007-03-07

Family

ID=27799261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03100746A Expired - Lifetime EP1349235B1 (de) 2002-03-26 2003-03-24 Dualband- Antennensystem für VHF/UHF

Country Status (7)

Country Link
US (1) US6836256B2 (de)
EP (1) EP1349235B1 (de)
AT (1) ATE356446T1 (de)
DE (1) DE60312249D1 (de)
ES (1) ES2283713T3 (de)
FR (1) FR2837988B1 (de)
SI (1) SI1349235T1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2028719A1 (de) * 2007-08-20 2009-02-25 Harris Corporation Multiband-Antennensystem für am Körper montierte und demontierte Anwendung

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
US6878147B2 (en) 2001-11-02 2005-04-12 Vivant Medical, Inc. High-strength microwave antenna assemblies
FR2849289B1 (fr) * 2002-12-20 2005-03-18 Socapex Amphenol Antenne colineaire du type coaxial alterne
FR2866988B1 (fr) * 2004-02-27 2006-06-02 Thales Sa Antenne a tres large bande v-uhf
US7469131B2 (en) * 2004-09-14 2008-12-23 Nokia Corporation Terminal and associated transducer assembly and method for selectively transducing in at least two frequency bands
US8395557B2 (en) * 2007-04-27 2013-03-12 Northrop Grumman Systems Corporation Broadband antenna having electrically isolated first and second antennas
DE102009015699A1 (de) * 2008-10-30 2010-05-06 Rohde & Schwarz Gmbh & Co. Kg Breitband-Antenne
CA2666896A1 (en) * 2009-05-27 2010-11-27 Valcom Manufacturing Group Inc. Multiple-band collinear dipole antenna
TWI418091B (zh) * 2009-12-15 2013-12-01 Arcadyan Technology Corp 雙頻天線單體
US9520640B2 (en) * 2010-12-29 2016-12-13 Electro-Magwave, Inc. Electromagnetically coupled broadband multi-frequency monopole with flexible polymer radome enclosure for wireless radio
US9253816B1 (en) 2011-06-30 2016-02-02 The Boeing Company Self-contained area network system
FR2988241B1 (fr) * 2012-03-13 2019-08-09 Renault S.A.S Systeme de communication sans fil a plusieurs recepteurs multiplexes.
US9300042B2 (en) 2014-01-24 2016-03-29 Honeywell International Inc. Matching and pattern control for dual band concentric antenna feed
EP3091610B1 (de) * 2015-05-08 2021-06-23 TE Connectivity Germany GmbH Antennensystem und antennenmodul mit verminderter interferenz zwischen strahlungsmustern
DE102016219164B4 (de) 2016-10-04 2024-05-29 Bayerische Motoren Werke Aktiengesellschaft Antennenanordnung für ein Fahrzeug und Fahrzeug
FR3068176B1 (fr) * 2017-06-26 2019-08-02 Tdf Structure antennaire colineaire a acces independants
RU2674516C1 (ru) * 2018-02-05 2018-12-11 Открытое акционерное общество "Научно-производственное объединение Ангстрем" Антенна
RU2674519C1 (ru) * 2018-02-12 2018-12-11 Открытое акционерное общество "Научно-производственное объединение Ангстрем" Антенна
CN110401023B (zh) * 2019-08-24 2023-12-01 嘉兴诺艾迪通信科技有限公司 一种具有陷波特性的超宽带v/uhf小型化全向天线
US20230036345A1 (en) * 2021-07-30 2023-02-02 Src, Inc. Folded monopole antenna for use within an array

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US4004257A (en) * 1975-07-09 1977-01-18 Vitek Electronics, Inc. Transmission line filter
DE3826777A1 (de) * 1988-08-06 1990-02-08 Kathrein Werke Kg Axiale zweibereichsantenne
US6057804A (en) * 1997-10-10 2000-05-02 Tx Rx Systems Inc. Parallel fed collinear antenna array
FR2806535A1 (fr) * 2000-03-14 2001-09-21 Francois Tourres Antenne multifrequence sans separateur pour vehicule

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EP0820116B1 (de) * 1996-07-18 2004-10-06 Matsushita Electric Industrial Co., Ltd. Mobile Funkantenne
FR2758012B1 (fr) 1996-12-27 1999-05-28 Thomson Csf Antenne double, en particulier pour vehicule
FR2759498B1 (fr) 1997-02-07 1999-08-27 Thomson Csf Antenne a geometrie variable
FR2790872B1 (fr) 1999-03-12 2003-05-30 Thomson Csf Antenne demontable, a charge capacitive, de type fouet et procede de fabrication d'un segment rayonnant d'une telle antenne
US6229495B1 (en) * 1999-08-06 2001-05-08 Bae Systems Advanced Systems Dual-point-feed broadband whip antenna
US6429821B1 (en) * 1999-10-12 2002-08-06 Shakespeare Company Low profile, broad band monopole antenna with inductive/resistive networks
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Publication number Priority date Publication date Assignee Title
US4004257A (en) * 1975-07-09 1977-01-18 Vitek Electronics, Inc. Transmission line filter
DE3826777A1 (de) * 1988-08-06 1990-02-08 Kathrein Werke Kg Axiale zweibereichsantenne
US6057804A (en) * 1997-10-10 2000-05-02 Tx Rx Systems Inc. Parallel fed collinear antenna array
FR2806535A1 (fr) * 2000-03-14 2001-09-21 Francois Tourres Antenne multifrequence sans separateur pour vehicule

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2028719A1 (de) * 2007-08-20 2009-02-25 Harris Corporation Multiband-Antennensystem für am Körper montierte und demontierte Anwendung
US7755553B2 (en) 2007-08-20 2010-07-13 Harris Corporation Multiband antenna system for body-worn and dismount applications

Also Published As

Publication number Publication date
ES2283713T3 (es) 2007-11-01
DE60312249D1 (de) 2007-04-19
SI1349235T1 (sl) 2007-08-31
FR2837988A1 (fr) 2003-10-03
ATE356446T1 (de) 2007-03-15
EP1349235B1 (de) 2007-03-07
FR2837988B1 (fr) 2008-06-20
US20030227419A1 (en) 2003-12-11
US6836256B2 (en) 2004-12-28

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