EP1523062B1 - Antenne omnidirectionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo - Google Patents

Antenne omnidirectionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo Download PDF

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Publication number
EP1523062B1
EP1523062B1 EP03447245A EP03447245A EP1523062B1 EP 1523062 B1 EP1523062 B1 EP 1523062B1 EP 03447245 A EP03447245 A EP 03447245A EP 03447245 A EP03447245 A EP 03447245A EP 1523062 B1 EP1523062 B1 EP 1523062B1
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EP
European Patent Office
Prior art keywords
antenna
biquad
antenna according
antenna elements
reflector
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
EP03447245A
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German (de)
English (en)
French (fr)
Other versions
EP1523062A1 (fr
Inventor
Philippe Herman
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT03447245T priority Critical patent/ATE323954T1/de
Priority to SI200330274T priority patent/SI1523062T1/sl
Priority to DE60304710T priority patent/DE60304710T2/de
Priority to ES03447245T priority patent/ES2263942T3/es
Priority to EP03447245A priority patent/EP1523062B1/fr
Publication of EP1523062A1 publication Critical patent/EP1523062A1/fr
Application granted granted Critical
Publication of EP1523062B1 publication Critical patent/EP1523062B1/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
    • 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

Definitions

  • the present invention relates generally to an omnidirectional antenna for transmitting and / or receiving audio and / or video signals.
  • the invention relates to an omnidirectional antenna for the transmission and / or reception of audio and / or video signals, of the type comprising four antenna elements powered electrically by currents of substantially the same phase and of the same amplitude.
  • each antenna element comprising a biquad-type radiating element, a feed center and a reflector associated with this radiating element and each of the feeding centers lying on a common circle and at the intersection points of two diameters orthogonal with this circle.
  • the 2.4 Ghz video electromagnetic signal receiving system usually includes a high gain omnidirectional antenna behind which a pre-amplifier is placed to improve the noise factor and receiver dynamics.
  • US Pat. No. 4,479,127 describes a horizontally polarized antenna formed of four antenna elements arranged in a first pair respectively. of parallel elements and a second pair of parallel elements, these first and second pair of elements being perpendicular to each other and the elements of each pair being equidistant from the axis of the assembly.
  • Each of these elements is formed of two square loops joined by a common vertex having feeding centers at the level thereof.
  • This antenna has a VSWR of less than 2: 1 and a four-leaf clover pattern.
  • Such an antenna can be used in long range transmission / reception applications.
  • the object of the present invention is to propose an antenna of the type indicated previously that can be used for example at frequencies of the order of 500 Mhz or 2.4 Ghz and which makes it possible to overcome the drawbacks of the state of the art.
  • each antenna element is in vertical rectilinear polarization, in that the main radiation lobe of each antenna element has an opening substantially of 90 ° in the vertical and horizontal planes and that the feed centers of two adjacent antenna elements are separated by a working wavelength ⁇ .
  • the feeding centers of two adjacent antenna elements are separated by a length equal to ⁇ .
  • Each antenna element comprises a radiating element or radiator consisting of a continuous loop taking the geometric shape of two squares located in the same plane having a common vertex and perimeter substantially equal to 2 ⁇ , and an associated reflector.
  • the biquad antenna element constitutes a particularly advantageous antenna element in the context of the invention because of the 90 ° opening of its main lobe and its appreciable gain of 10 dbi.
  • each main lobe of radiation has an opening substantially of 90 ° in the vertical and horizontal planes.
  • the antenna elements are connected to a coupler via a coaxial power supply cable.
  • the antenna according to the invention comprises a set of four biquad antenna elements 1, each comprising the reflector 2 and the biquad 3 proper connected to a 5-way coupler, indicated in 4. This connection is provided by means of a coaxial power supply cable.
  • each biquad 3 is tangent to the common circle.
  • Figure 1 also shows the 90 ° opening angle of the main lobe of each antenna element, two adjacent lobes being spaced from each other by a length ⁇ . Consequently, the four biquad antenna elements 1 completely cover an angle of 360 °.
  • the biquad 3 is configured in closed loop forming two squares in the same plane, united by a common vertex and each side of which is substantially equal to ⁇ / 4.
  • This biquad consists of a bare copper wire welded to the coaxial cable 5, the two ends of the copper wire being themselves secured, if necessary, to the reflector 2 by any means so as to stiffen the assembly.
  • the reflector 2 is formed of a metal plate generally made of copper. Steel, especially stainless steel or polychlorinated biphenyl (“PCB”) can be used as well. In this case, it may be advantageous to solder, for example copper, to the passage opening of the coaxial cable 5 formed in this reflector, so as to ensure a good physical and electrical connection.
  • Such an assembly is known having been described for example in "Biquad Antenna Construction", Martybugs.net, Wireless Networking Info (http: // Martybugs net / wireless / biquad) (date of making available to the public: 02 May 2003 and 20 July 2003).
  • FIG. 2 also shows that each antenna element 1, via its reflector 2, is secured to a support 7 which can take the form of four angled profiles.
  • this support is made of stainless steel.
  • other materials including insulating materials such as polymethyl methacrylate may be used.
  • FIG. 3 shows the four female N connectors 8 to the chassis 9, the input N female connector. 10 as well as the linear conductors 11 and cylindrical 12.
  • the antenna according to the invention is devoid of antenna element support but comprises a set of four biquad antenna elements 1 each comprising the reflector 2 and the antenna. biquad 3 connected to the coupler 4 via the coaxial cable 5.
  • the reflector 2 is also configured as an antenna element support.
  • each of the four biquads 3 having its feed center at 6, is connected to a 2.4 Ghz coupler indicated 4 and shown in Figure 3.
  • This connection is made via a coaxial cable 5 of an impedance 50 ⁇ , semi-rigid power supply cable covered with an electrically insulating material.
  • each feeding center being distant from a length ⁇ of an adjacent feeding center, the diameter of the circle connecting these four centers is, therefore, 174 mm.
  • the length of each biquad that is to say the distance separating the two farthest vertices, is 90 mm, each of these biquads being 17 mm distant from the associated reflector 2.
  • Each reflector consists of a copper plate 100 mm x 100 mm and a thickness of 1.5 mm fixed on a support 7 of antenna element, two opposite reflectors being separated by 140 mm.
  • the length of its linear conductors 11 is 19 mm each, the cylindrical conductor 12, formed of a copper or brass bar, having a diameter of 8.73 mm and a length of 65 mm determined by the curve in FIG.
  • each of the four biquads 3 has its feed center at 6 and is connected to a 500 Mhz coupler indicated at 4 and shown in Figure 3 and this, by via a coaxial power cable 5 (impedance: 50 ⁇ ).
  • the diameter of the circle connecting these four centers is 850 mm.
  • each biquads 3 consisting of a continuous copper wire, are configured in two equal squares, with a common vertex, each side of which has a length of about 150 mm (1/4 of a wave). .
  • the length of each biquad (distance separating the two furthest vertices) is 420 mm and each of these biquads is 85 mm distant from the associated reflector 2.
  • each reflector 2 consists of a stainless steel plate 680 mm long and about 600 mm high so that two opposing reflectors are separated by 680 mm.
  • each reflector is provided with a passage 13 for the coaxial cable 5, the orifice around which copper is soldered.
  • Coupler 4 for its part, is identical to that of Example 1 with the exception of the length of the cylindrical conductor which is 320 mm as determined by the curve in FIG.
  • the antenna according to the invention is particularly interesting for combating the typical swell phenomenon at sea.
  • the video image received at 2.4 Ghz is of perfectly exploitable quality and without stall even by 4 m swell. between two boats about 6 km apart.
  • this antenna can be adapted to frequencies other than 2.4 Ghz and in particular at frequencies of the order of 500 MHz for the radio (telephone and "data") where it has been equally effective.
  • this antenna can be used both at the reception and the broadcast and can also find other applications such as 2Mbit transmission between ships.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Radio Transmission System (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP03447245A 2003-10-07 2003-10-07 Antenne omnidirectionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo Expired - Lifetime EP1523062B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT03447245T ATE323954T1 (de) 2003-10-07 2003-10-07 Rundstrahlende antenne zum senden und empfangen von audio/video signalen
SI200330274T SI1523062T1 (sl) 2003-10-07 2003-10-07 V vse smeri sevajoca antena za oddajanje in sprejemanje audio/video signalov
DE60304710T DE60304710T2 (de) 2003-10-07 2003-10-07 Rundstrahlende Antenne zum Senden und Empfangen von Audio/Video Signalen
ES03447245T ES2263942T3 (es) 2003-10-07 2003-10-07 Antena onmidireccional para la transmision y/o recepcion de señales de audio y/o video.
EP03447245A EP1523062B1 (fr) 2003-10-07 2003-10-07 Antenne omnidirectionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03447245A EP1523062B1 (fr) 2003-10-07 2003-10-07 Antenne omnidirectionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo

Publications (2)

Publication Number Publication Date
EP1523062A1 EP1523062A1 (fr) 2005-04-13
EP1523062B1 true EP1523062B1 (fr) 2006-04-19

Family

ID=34307088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03447245A Expired - Lifetime EP1523062B1 (fr) 2003-10-07 2003-10-07 Antenne omnidirectionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo

Country Status (5)

Country Link
EP (1) EP1523062B1 (sl)
AT (1) ATE323954T1 (sl)
DE (1) DE60304710T2 (sl)
ES (1) ES2263942T3 (sl)
SI (1) SI1523062T1 (sl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11855745B2 (en) 2016-08-25 2023-12-26 Star Mesh LLC Radio system using satellites

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876673B1 (fr) * 2006-07-07 2008-09-17 Philippe Herman Antenne directionnelle pour la transmission et/ou la réception de signaux audio et/ou vidéo
EP2226896B1 (fr) * 2009-03-04 2014-04-16 Philippe Herman Antenne omnidirectionnelle multibande
EP2733788A1 (fr) * 2012-11-20 2014-05-21 Philippe Herman Antenne omnidirectionnelle monobande
US10085200B1 (en) 2017-09-29 2018-09-25 Star Mesh LLC Radio system using nodes with high gain antennas
CN109888513B (zh) 2017-12-06 2021-07-09 华为技术有限公司 天线阵列及无线通信设备
US10291316B1 (en) 2017-12-11 2019-05-14 Star Mesh LLC Data transmission systems and methods using satellite-to-satellite radio links
KR20210042918A (ko) 2018-07-12 2021-04-20 스타 메쉬 엘엘씨 체계적으로 분포된 궤도 위성을 포함하는 통신 시스템 및 방법
US11870543B2 (en) 2020-05-18 2024-01-09 Star Mesh LLC Data transmission systems and methods for low earth orbit satellite communications
US11968023B2 (en) 2020-12-02 2024-04-23 Star Mesh LLC Systems and methods for creating radio routes and transmitting data via orbiting and non-orbiting nodes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479127A (en) * 1982-08-30 1984-10-23 Gte Products Corporation Bi-loop antenna system
FR2779235B1 (fr) * 1998-05-26 2002-11-29 Applic Rech Electronique Systeme d'antennes de radiogoniometrie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11855745B2 (en) 2016-08-25 2023-12-26 Star Mesh LLC Radio system using satellites

Also Published As

Publication number Publication date
ATE323954T1 (de) 2006-05-15
DE60304710D1 (de) 2006-05-24
SI1523062T1 (sl) 2006-08-31
DE60304710T2 (de) 2007-04-05
ES2263942T3 (es) 2006-12-16
EP1523062A1 (fr) 2005-04-13

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