EP2452398B1 - Foldable log-periodic antenna - Google Patents

Foldable log-periodic antenna Download PDF

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Publication number
EP2452398B1
EP2452398B1 EP10741893.1A EP10741893A EP2452398B1 EP 2452398 B1 EP2452398 B1 EP 2452398B1 EP 10741893 A EP10741893 A EP 10741893A EP 2452398 B1 EP2452398 B1 EP 2452398B1
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EP
European Patent Office
Prior art keywords
transmitting means
feed line
transmitting
elements
periodic antenna
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EP10741893.1A
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German (de)
French (fr)
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EP2452398A1 (en
Inventor
Marc Harscher
Herbert Heidrich
Jörg LOGEMANN
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Hensoldt Sensors GmbH
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Hensoldt Sensors GmbH
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Publication of EP2452398A1 publication Critical patent/EP2452398A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/10—Logperiodic antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/081—Inflatable antennas

Definitions

  • the invention relates to a foldable logarithmic-periodic antenna according to the features of patent claim 1.
  • a logarithmic-periodic antenna (abbreviated LPDA for Logarithmic-Periodic Dipole Antenna, also referred to as LogPed or LogPer for short) is a broadband antenna consisting of a number of dipoles whose length and distance to the direction of radiation decrease.
  • the structure of an LPDA is basically known, for example EP 1 923 955 A1 ,
  • LPDAs are used as television receiving antennas, in particular DVB-T, as they can operate both in the ultra-short wave (VHF) and in the decimeter wave (UHF) range and thus receive several different frequency ranges or channels with a single antenna can be.
  • VHF ultra-short wave
  • UHF decimeter wave
  • LPDA wide frequency ranges can be sent or received.
  • Further fields of application are military and civilian radio communication as well as anti-interference vehicles for locating radio interference.
  • jamming transmitter equivalent to the transmitter to be disturbed, emits energy in the form of electromagnetic waves in order to superimpose the original waves of the opposing transmitter and thus to receive the receiver to disturb.
  • the object of the invention is to provide a foldable logarithmic-periodic antenna, which can be transferred from a transport position into an operating position or vice versa.
  • the logarithmic periodic antenna comprises a feed line, one or more transmitting means for transmitting and / or receiving electromagnetic signals, one or more carrier elements for holding the transmitting means, one or more means for producing a tensile stress on the transmitting means.
  • the transmitting means are connected to a carrier elements and the feed line.
  • a carrier element in turn is connected to the feed line via a hinge device, so that the antenna can be transferred from a transport position into an operating position and vice versa.
  • the one or more means for producing a tensile stress on the transmitting means are tubular and acted upon by an internal pressure.
  • these one or more means for producing a tensile stress on the transmitting means are connected to the carrier elements for holding the transmitting means.
  • the transmitting means are fastened via connection points to the carrier elements and the carrier elements are designed as flexible wires.
  • the tubular means for producing a tensile stress on the transmitting means subjected to an internal pressure, for example up to 50 bar, so try these occupy the most energetically favorable state. In this energetically most favorable state, the LPDA is then in the operating state. If the internal pressure is reduced, for example in the case of the degradation of the antenna, then this is energetic best condition abandoned and the antenna can be brought into a transport position.
  • an internal pressure for example up to 50 bar
  • the transfer of the antenna takes place from a transport position to an operating position upon application of the tubular means with pressure almost automatically.
  • the pressurization of the tubular means with an internal pressure is carried out by means known to a person skilled in the art, e.g. by means of pneumatic oils or compressed air.
  • the tubular means may e.g. be made of PU tubing or other known to a person skilled flexible and pressure-resistant material.
  • the transmitting means are designed as rigid transmitting elements or flexible transmitting strands.
  • the transmitting means are suitably made of a corrosion resistant conductive material, e.g. Made of stainless steel.
  • the support elements for holding the transmitting means are designed as rigid or flexible support elements.
  • the support members are made of a non-conductive material, e.g. made of glass fiber reinforced plastics.
  • one or more additional means for producing a tensile stress on the transmitting means are present between the carrier element and the transmitting means and / or between the feeding line and the transmitting means. This ensures that, despite, for example, caused by temperature fluctuations length changes of the transmission means a uniform tension on the transmission means acts.
  • Fig. 1 is a first embodiment of a foldable LPDA according to the invention shown in the operating state.
  • the feed line 1 is connected at one end via the connection point 7 with the carrier elements 2a, 2b. Between the feed line 1 and the support elements 2a, 2b transmitting means 3 are arranged.
  • the means 4 for producing a tensile stress on the transmitting means is designed annular in this construction. In the operating state, i. the means 4 is pressurized, the means 4 assumes the most energetically favorable state, which in this case corresponds to the shape of a ring.
  • the carrier element 2a is connected at the connection points 5a, 7 with a means 4 for producing a tensile stress on the transmitting means.
  • the carrier element 2b is connected at the connection points 5b, 7 with a means 4 for producing a tensile stress on the transmitting means.
  • the two support elements 2a, 2b and the feed line 1 are thus connected to the means 4 for producing a tensile stress on the transmitting means.
  • This connection point 7 also serves as a joint between the feed line 1 and the support elements 2a, 2b.
  • the feed line 1 and the transmitting means 3 can be designed either as rigid elements or as flexible wires.
  • flexible wires can significantly reduce the pack size in the transport position.
  • this variant brings weight savings.
  • the support elements 2a, 2b are made of a non-conductive material, e.g. glass fiber reinforced plastics.
  • the feed line 1, also referred to as boom tube, is a two-wire line or a strip line.
  • the transmitting means 3 are made of a conductive and corrosion resistant material, e.g. Made of stainless steel.
  • the coupling of the transmitting means 3 between the carrier elements 2a, 2b and the feed line 1 in order to achieve the desired in the operating position of the antenna radiation properties is carried out according to a person skilled in the known rules, e.g. Cross principle, i. a horizontal electrical connection with changing assignment of the radiator elements (http://www.wikiweise.de/wiki/Logarithmisch-Periodische%20Dipolantenne).
  • guying device 2c, 2d are present. These bracing devices 2c, 2d are each connected at one end via the connection point 9 to the feed line 1 and at the other end via the connection point 5a or 5b to the means 4 for producing a tensile stress on the transmitting means. This provides additional stability to the antenna in the operating position.
  • the transmitting means 3 are connected via spring elements 6 to the carrier elements 2a, 2b. As a result, an additional tensile force is generated on the transmitting means 3 in the operating state of the antenna. This additional pulling force compensates e.g. Length changes of the transmitting means 3, which are caused by temperature fluctuations of the environment.
  • the means 4 assumes the energetically most favorable state in the operating state.
  • the support elements 2a, 2b between the connection points 5b and 7 or 5a and 7 are stretched. In this position bring the support elements 2a, 2b attached to them via the connection point 8 transmitting means 3 in the optimum position for the operating state.
  • Fig. 2 shows a second embodiment of a foldable LPDA according to the invention.
  • the arrangement of the feed line 1, the transmitting means 3, the support elements 2a, 2b and the spring elements 6 corresponds to the already in Fig. 1 Described.
  • a means 4 for producing a tensile stress on the transmitting means is connected at the connection point 9 with the feed line 1 and at the connection point 5a or 5b with the carrier element 2a or 2b.
  • the connection is made via connecting elements 10a, 10b, 10c, 10d, which are designed as rigid elements.
  • the means 4 By the pressurization of the means 4, these assume the most energetically favorable state.
  • the means 4 are designed such that the energetically most favorable state corresponds to a straight line.
  • the connecting elements 10a, 10b and 10c, 10d When transferring from a transport position into an operating position, the connecting elements 10a, 10b and 10c, 10d erect, so that the transmitting means 3 between the feed line 1 and the support elements 2a, 2b are stretched.
  • Fig. 3 shows a third embodiment of a foldable LPDA according to the invention.
  • the LPDA is shown in a transport position and in the lower part in an operating position.
  • the carrier elements 2a, 2b are each divided into two sections 2a_1 and 2a_2 or 2b_1 and 2b_2.
  • the respective sections of a carrier element 2a, 2b are connected via a joint 22a and 22b.
  • the support elements 2a, 2b are connected to a means 4 in the region of this joint 22a, 22b.
  • the means 4 is not connected to the joint 22a, 22b.
  • the two support elements 2a, 2b are as in Fig. 1 and Fig. 2 in serving as a joint connection point 7 with each other and the feed line 1 connected.
  • the two support elements 2a, 2b are connected to each other in the region of the connection point 7 via a means 4, this means 4 is not connected to the joint in the connection point 7.
  • the means 4 pressurized they take the energetically most favorable for them state.
  • Fig. 3 This energetically most favorable state in the region of the joints 22a and 22b is almost a straight line.
  • the extension of the means 4 causes the sections 2a_2 and 2b_2 to fold over and form an extension of the sections 2a_1 and 2b_1.
  • the feed line 1 can also be divided into one or more sections.
  • the pressurization of the means 4 arranged there also leads to an extension whereby the two support elements 2a, 2b are led away from one another. This ensures that a tensile stress acts on the transmitting elements 3 in the operating position.

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Description

Die Erfindung betrifft eine faltbare logarithmisch-periodische Antenne gemäß den Merkmalen des Patentanspruchs 1.The invention relates to a foldable logarithmic-periodic antenna according to the features of patent claim 1.

Eine logarithmisch-periodische Antenne (Abk. LPDA für logarithmisch-periodische Dipol-Antenne, kurz auch als LogPed oder LogPer bezeichnet) ist eine Breitbandantenne, die aus einer Anzahl von Dipolen besteht, deren Länge und Abstand zur Strahlungsrichtung hin abnehmen. Der Aufbau einer LPDA ist grundsätzlich bekannt, z.B. aus EP 1 923 955 A1 .A logarithmic-periodic antenna (abbreviated LPDA for Logarithmic-Periodic Dipole Antenna, also referred to as LogPed or LogPer for short) is a broadband antenna consisting of a number of dipoles whose length and distance to the direction of radiation decrease. The structure of an LPDA is basically known, for example EP 1 923 955 A1 ,

LPDA werden unter anderem als Fernseh-Empfangsantennen, hier besonders DVB-T, eingesetzt, da sie zugleich sowohl im Ultrakurzwellen- (VHF) als auch im Dezimeterwellen-Bereich (UHF) arbeiten können und so mit einer einzigen Antenne mehrere unterschiedliche Frequenzbereiche oder Kanäle empfangen werden können. Ebenso können bei der EMV-Messtechnik mit LPDA weite Frequenzbereiche gesendet oder empfangen werden. Weitere Einsatzgebiete sind die militärische und zivile Funkkommunikation sowie Entstörfahrzeuge zum Orten von Funkstörungen.Among other things, LPDAs are used as television receiving antennas, in particular DVB-T, as they can operate both in the ultra-short wave (VHF) and in the decimeter wave (UHF) range and thus receive several different frequency ranges or channels with a single antenna can be. Likewise, in the EMC measurement technology with LPDA wide frequency ranges can be sent or received. Further fields of application are military and civilian radio communication as well as anti-interference vehicles for locating radio interference.

Ein weiteres Anwendungsgebiet von LPDA ist der Einsatz als Störsender, so genannter Jammer. Hierbei sendet der Störsender, äquivalent zum zu störenden Sender, Energie in Form von elektromagnetischen Wellen aus, um die ursprünglichen Wellen des gegnerischen Senders zu überlagern und den Empfang des Receivers somit zu
stören.Another application of LPDA is the use as a jammer, so-called jammer. In this case, the jamming transmitter, equivalent to the transmitter to be disturbed, emits energy in the form of electromagnetic waves in order to superimpose the original waves of the opposing transmitter and thus to receive the receiver
to disturb.

Der Einsatz eines Jammers erfordert im Einsatzfall eine schnelle Auf- und Abbauzeit. Dies bringt das Erfordernis mit sich, dass auch die LPDA innerhalb kurzer Zeit auf und wieder abgebaut werden muss, d.h. die LPDA muss von einer Transportstellung in eine Betriebsstellung und umgekehrt gebracht werden können.The use of a jammer requires a fast set-up and dismantling time in the application. This brings with it the requirement that even the LPDA within a short time on and must be dismantled again, ie the LPDA must be able to be brought from a transport position to an operating position and vice versa.

Ais US 3,715,759 sowie DE 3306054 A1 sind Antennen bekannt, welche von einer Transportstellung in eine Betriebsstellung und umgekehrt gebracht werden könnenais US 3,715,759 such as DE 3306054 A1 Antennas are known which can be brought from a transport position to an operating position and vice versa

Aufgabe der Erfindung ist es, eine faltbare logarithmisch-periodische Antenne anzugeben, welche von einer Transportstellung in eine Betriebsstellung bzw. umgekehrt überführbar ist.The object of the invention is to provide a foldable logarithmic-periodic antenna, which can be transferred from a transport position into an operating position or vice versa.

Diese Aufgabe wird durch die faltbare logarithmisch-periodische Antenne mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausführungen der Erfindung sind Gegenstand von Unteransprüchen.This object is achieved by the foldable logarithmic periodic antenna with the features of patent claim 1. Advantageous embodiments of the invention are the subject of dependent claims.

Die erfindungsgemäße logarithmisch-periodische Antenne umfasst eine Speiseleitung, ein oder mehrere Sendemittel zum Senden und/oder Empfangen von elektromagnetischen Signalen, ein oder mehrere Trägerelemente zur Halterung der Sendemittel, ein oder mehrere Mittel zur Herstellung einer Zugspannung auf die Sendemittel. Die Sendemittel sind dabei mit einem Trägerelemente und der Speiseleitung verbunden. Ein Trägerelement wiederum ist mit der Speiseleitung über eine Gelenkvorrichtung verbunden, so dass die Antenne von einer Transportstellung in eine Betriebstellung und umgekehrt überführbar ist.
Gemäß der Erfindung sind die ein oder mehreren Mittel zur Herstellung einer Zugspannung auf die Sendemittel schlauchförmig und mit einem Innendruck beaufschlagbar ausgeführt. Darüber hinaus sind diese ein oder mehreren Mittel zur Herstellung einer Zugspannung auf die Sendemittel mit den Trägerelementen zur Halterung der Sendemittel verbunden. Ferner sind die Sendemittel über Verbindungspunkte an den Trägerelemente befestigt und die Trägerelemente sind als biegsame Drähte ausgeführt.The logarithmic periodic antenna according to the invention comprises a feed line, one or more transmitting means for transmitting and / or receiving electromagnetic signals, one or more carrier elements for holding the transmitting means, one or more means for producing a tensile stress on the transmitting means. The transmitting means are connected to a carrier elements and the feed line. A carrier element in turn is connected to the feed line via a hinge device, so that the antenna can be transferred from a transport position into an operating position and vice versa.
According to the invention, the one or more means for producing a tensile stress on the transmitting means are tubular and acted upon by an internal pressure. In addition, these one or more means for producing a tensile stress on the transmitting means are connected to the carrier elements for holding the transmitting means. Furthermore, the transmitting means are fastened via connection points to the carrier elements and the carrier elements are designed as flexible wires.

Werden die schlauchförmigen Mittel zur Herstellung einer Zugspannung auf die Sendemittel mit einem Innendruck beaufschlagt, z.B. bis zu 50 bar, so versuchen diese den energetisch günstigsten Zustand einzunehmen. In diesem energetisch günstigsten Zustand befindet sich die LPDA dann im Betriebszustand. Wird der Innendruck reduziert, z.B. im Falle des Abbaus der Antenne, so wird dieser energetisch günstigste Zustand aufgegeben und die Antenne kann in eine Transportstellung gebracht werden.If the tubular means for producing a tensile stress on the transmitting means subjected to an internal pressure, for example up to 50 bar, so try these occupy the most energetically favorable state. In this energetically most favorable state, the LPDA is then in the operating state. If the internal pressure is reduced, for example in the case of the degradation of the antenna, then this is energetic best condition abandoned and the antenna can be brought into a transport position.

Dadurch, dass die Trägerelemente mit den schlauchförmigen Mittel zur Herstellung einer Zugspannung auf die Sendemittel verbunden sind, erfolgt die Überführung der Antenne von einer Transportstellung in eine Betriebsstellung bei Beaufschlagung der schlauchförmigen Mittel mit Druck nahezu automatisch.Characterized in that the carrier elements are connected to the tubular means for producing a tensile stress on the transmitting means, the transfer of the antenna takes place from a transport position to an operating position upon application of the tubular means with pressure almost automatically.

Die Beaufschlagung der schlauchförmigen Mittel mit einem Innendruck erfolgt nach einem Fachmann bekannten Möglichkeiten, z.B. mittels pneumatischer Öle oder Pressluft. Die schlauchförmigen Mittel können z.B. aus PU-Schlauch oder einem anderen einem Fachmann bekannten flexiblen und druckstabilen Material gefertigt sein.The pressurization of the tubular means with an internal pressure is carried out by means known to a person skilled in the art, e.g. by means of pneumatic oils or compressed air. The tubular means may e.g. be made of PU tubing or other known to a person skilled flexible and pressure-resistant material.

In einer ersten Ausführungsform der Erfindung sind die Sendemittel als steife Sendeelemente oder biegsame Sendelitzen ausgeführt. Darüber hinaus sind die Sendemittel zweckmäßig aus einem korrosionsbeständigen leitfähigen Material, z.B. Edelstahl gefertigt.In a first embodiment of the invention, the transmitting means are designed as rigid transmitting elements or flexible transmitting strands. In addition, the transmitting means are suitably made of a corrosion resistant conductive material, e.g. Made of stainless steel.

In einer zweiten Ausführungsform der Erfindung sind die Trägerelemente zur Halterung der Sendemittel als steife oder biegsame Trägerelemente ausgeführt. Zweckmäßig sind die Trägerelemente aus einem nichtleitendem Material, z.B. glasfaserverstärkten Kunststoffen gefertigt.In a second embodiment of the invention, the support elements for holding the transmitting means are designed as rigid or flexible support elements. Suitably, the support members are made of a non-conductive material, e.g. made of glass fiber reinforced plastics.

In einer dritten Ausführungsform der Erfindung sind zwischen Trägerelement und Sendemittel und/oder zwischen Speiseleitung und Sendemittel ein oder mehrere zusätzliche Mittel zur Herstellung einer Zugspannung auf die Sendemittel, z.B. ein oder mehrere Federelemente vorhanden. Dadurch wird gewährleistet, dass trotz z.B. aufgrund Temperaturschwankungen hervorgerufene Längenänderungen der Sendemittel eine gleichmäßige Zugspannung auf die Sendemittel wirkt.In a third embodiment of the invention, one or more additional means for producing a tensile stress on the transmitting means, for example one or more spring elements, are present between the carrier element and the transmitting means and / or between the feeding line and the transmitting means. This ensures that, despite, for example, caused by temperature fluctuations length changes of the transmission means a uniform tension on the transmission means acts.

Die Erfindung wird im Folgenden anhand von Zeichnungen näher erläutert. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel einer erfindungsgemäßen faltbaren LPDA,
Fig. 2
ein zweites Ausführungsbeispiel einer erfindungsgemäßen faltbaren LPDA,
Fig. 3
ein drittes Ausführungsbeispiel einer erfindungsgemäßen faltbaren LPDA.
The invention will be explained in more detail below with reference to drawings. Show it:
Fig. 1
a first embodiment of a foldable LPDA according to the invention,
Fig. 2
A second embodiment of a foldable LPDA according to the invention,
Fig. 3
A third embodiment of a foldable LPDA invention.

In Fig. 1 ist ein erstes Ausführungsbeispiel einer erfindungsgemäßen faltbaren LPDA im Betriebszustand dargestellt.
Bei diesem Antennenaufbau ist die Speiseleitung 1 an einem Ende über den Verbindungspunkt 7 mit den Trägerelementen 2a, 2b verbunden. Zwischen der Speiseleitung 1 und den Trägerelementen 2a, 2b sind Sendemittel 3 angeordnet.In Fig. 1 is a first embodiment of a foldable LPDA according to the invention shown in the operating state.
In this antenna structure, the feed line 1 is connected at one end via the connection point 7 with the carrier elements 2a, 2b. Between the feed line 1 and the support elements 2a, 2b transmitting means 3 are arranged.

Das Mittel 4 zur Herstellung einer Zugspannung auf die Sendemittel ist bei diesem Aufbau ringförmig ausgeführt. Im Betriebszustand, d.h. das Mittel 4 ist mit Druck beaufschlagt, nimmt das Mittel 4 den energetisch günstigsten Zustand ein, welcher in diesem Fall die Form eines Ringes entspricht.The means 4 for producing a tensile stress on the transmitting means is designed annular in this construction. In the operating state, i. the means 4 is pressurized, the means 4 assumes the most energetically favorable state, which in this case corresponds to the shape of a ring.

Das Trägerelement 2a ist an den Verbindungspunkten 5a, 7 mit einem Mittel 4 zur Herstellung einer Zugspannung auf die Sendemittel verbunden. Das Trägerelement 2b ist an den Verbindungspunkten 5b, 7 mit einem Mittel 4 zur Herstellung einer Zugspannung auf die Sendemittel verbunden. An dem Verbindungspunkt 7 sind somit die beiden Trägerelemente 2a, 2b sowie die Speiseleitung 1 mit dem Mittel 4 zur Herstellung einer Zugspannung auf die Sendemittel verbunden. Dieser Verbindungspunkt 7 dient ferner als Gelenk zwischen der Speiseleitung 1 und den Trägerelemente 2a, 2b.The carrier element 2a is connected at the connection points 5a, 7 with a means 4 for producing a tensile stress on the transmitting means. The carrier element 2b is connected at the connection points 5b, 7 with a means 4 for producing a tensile stress on the transmitting means. At the connection point 7, the two support elements 2a, 2b and the feed line 1 are thus connected to the means 4 for producing a tensile stress on the transmitting means. This connection point 7 also serves as a joint between the feed line 1 and the support elements 2a, 2b.

Die Speiseleitung 1 und die Sendemittel 3 können entweder als steife Elemente oder als biegsame Drähte ausgeführt sein. Bei der
Verwendung von biegsamen Drähten lässt sich das Packmaß in der Transportstellung erheblich reduzieren. Außerdem bringt diese Variante Gewichtseinsparungen.The feed line 1 and the transmitting means 3 can be designed either as rigid elements or as flexible wires. In the
Use of flexible wires can significantly reduce the pack size in the transport position. In addition, this variant brings weight savings.

Die Trägerelemente 2a, 2b sind aus einem nichtleitenden Material gefertigt, z.B. glasfaserverstärkte Kunststoffe. Die Speiseleitung 1, auch als Boomrohr bezeichnet, ist eine Zweidrahtleitung oder eine Streifenleitung. Die Sendemittel 3 sind aus einem leitfähigem und korrosionsbeständigem Material, z.B. Edelstahl gefertigt. Die Ankopplung der Sendemittel 3 zwischen den Trägerelementen 2a, 2b und der Speiseleitung 1 um die in der Betriebsstellung der Antenne gewünschten Abstrahleigenschaften zu erreichen, erfolgt nach einem Fachmann bekannten Regeln, z.B. Kreuzprinzip, d.h. eine horizontale elektrische Verbindung mit wechselnder Zuordnung der Strahlerelemente (http://www.wikiweise.de/wiki/Logarithmisch-Periodische%20Dipolantenne).The support elements 2a, 2b are made of a non-conductive material, e.g. glass fiber reinforced plastics. The feed line 1, also referred to as boom tube, is a two-wire line or a strip line. The transmitting means 3 are made of a conductive and corrosion resistant material, e.g. Made of stainless steel. The coupling of the transmitting means 3 between the carrier elements 2a, 2b and the feed line 1 in order to achieve the desired in the operating position of the antenna radiation properties is carried out according to a person skilled in the known rules, e.g. Cross principle, i. a horizontal electrical connection with changing assignment of the radiator elements (http://www.wikiweise.de/wiki/Logarithmisch-Periodische%20Dipolantenne).

Zur zusätzlichen Halterung der Speiseleitung 1 sind Abspannvorrichtung 2c, 2d vorhanden. Diese Abspannvorrichtungen 2c, 2d sind jeweils mit einem Ende über den Verbindungspunkt 9 mit der Speiseleitung 1 und mit dem anderen Ende über die Verbindungspunkt 5a bzw. 5b mit dem Mittel 4 zur Herstellung einer Zugspannung auf die Sendemittel verbunden. Dadurch wird der Antenne in der Betriebsstellung zusätzliche Stabilität gewährt.For additional support of the feed line 1 guying device 2c, 2d are present. These bracing devices 2c, 2d are each connected at one end via the connection point 9 to the feed line 1 and at the other end via the connection point 5a or 5b to the means 4 for producing a tensile stress on the transmitting means. This provides additional stability to the antenna in the operating position.

Die Sendemittel 3 sind über Federelemente 6 mit den Trägerelementen 2a, 2b verbunden. Dadurch wird im Betriebszustand der Antenne eine zusätzliche Zugkraft auf die Sendemittel 3 erzeugt. Diese zusätzliche Zugkraft kompensiert z.B. Längenänderungen der Sendemittel 3, welche durch Temperaturschwankungen der Umgebung hervorgerufen werden.The transmitting means 3 are connected via spring elements 6 to the carrier elements 2a, 2b. As a result, an additional tensile force is generated on the transmitting means 3 in the operating state of the antenna. This additional pulling force compensates e.g. Length changes of the transmitting means 3, which are caused by temperature fluctuations of the environment.

Wie bereits oben beschrieben, nimmt das Mittel 4 im Betriebszustand den energetisch günstigsten Zustand ein. Dabei werden die Trägerelemente 2a, 2b zwischen den Verbindungspunkten 5b und 7 bzw. 5a und 7 gespannt. In dieser Position bringen die Trägerelemente 2a, 2b die an ihnen über den Verbindungspunkt 8 befestigten Sendemittel 3 in die für den Betriebszustand optimale Position.As already described above, the means 4 assumes the energetically most favorable state in the operating state. In this case, the support elements 2a, 2b between the connection points 5b and 7 or 5a and 7 are stretched. In this position bring the support elements 2a, 2b attached to them via the connection point 8 transmitting means 3 in the optimum position for the operating state.

Fig. 2 zeigt eine zweite Ausführungsform einer erfindungsgemäßen faltbaren LPDA. Bei dieser Variante entspricht die Anordnung der Speiseleitung 1, der Sendemittel 3, der Trägerelemente 2a, 2b sowie der Federelemente 6 dem bereits in Fig. 1 Beschriebenen. Fig. 2 shows a second embodiment of a foldable LPDA according to the invention. In this variant, the arrangement of the feed line 1, the transmitting means 3, the support elements 2a, 2b and the spring elements 6 corresponds to the already in Fig. 1 Described.

Jeweils ein Mittel 4 zur Herstellung einer Zugspannung auf die Sendemittel ist am Verbindungspunkt 9 mit der Speiseleitung 1 und am Verbindungspunkt 5a bzw. 5b mit dem Trägerelement 2a bzw. 2b verbunden. Die Verbindung erfolgt über Verbindungselemente 10a, 10b, 10c, 10d, welche als steife Elemente ausgeführt sind.In each case a means 4 for producing a tensile stress on the transmitting means is connected at the connection point 9 with the feed line 1 and at the connection point 5a or 5b with the carrier element 2a or 2b. The connection is made via connecting elements 10a, 10b, 10c, 10d, which are designed as rigid elements.

Durch die Druckbeaufschlagung der Mittel 4 nehmen diese den energetisch günstigsten Zustand an. In diesem Fall sind die Mittel 4 derart ausgeführt, dass der energetisch günstigste Zustand einer Geraden entspricht. Bei der Überführung von einer Transportstellung in eine Betriebsstellung werden die Verbindungselemente 10a, 10b und 10c, 10d aufgerichtet, so dass die Sendemittel 3 zwischen der Speiseleitung 1 und den Trägerelemente 2a, 2b gespannt werden.By the pressurization of the means 4, these assume the most energetically favorable state. In this case, the means 4 are designed such that the energetically most favorable state corresponds to a straight line. When transferring from a transport position into an operating position, the connecting elements 10a, 10b and 10c, 10d erect, so that the transmitting means 3 between the feed line 1 and the support elements 2a, 2b are stretched.

Fig. 3 zeigt ein dritte Ausführungsform einer erfindungsgemäßen faltbaren LPDA. Im oberen Teil der Fig. 3 ist die LPDA in einer Transportstellung und im unteren Teil in einer Betriebsstellung gezeigt. Fig. 3 shows a third embodiment of a foldable LPDA according to the invention. In the upper part of the Fig. 3 the LPDA is shown in a transport position and in the lower part in an operating position.

Die in Fig. 3 verwendeten Bezugszeichen bezeichnen die gleichen Gegenstände wie in Fig. 1 und Fig. 2.In the Fig. 3 Reference numerals denote the same items as in FIG Fig. 1 and Fig. 2 ,

Bei dieser Ausführungsform sind die Trägerelemente 2a, 2b jeweils in zwei Teilstücke 2a_1 und 2a_2 bzw. 2b_1 und 2b_2 aufgeteilt. Die jeweiligen Teilstücke eines Trägerelements 2a, 2b sind über ein Gelenk 22a bzw. 22b verbunden. Darüber hinaus sind die Trägerelemente 2a, 2b im Bereich dieses Gelenks 22a, 22b mit einem Mittel 4 verbunden. Das Mittel 4 ist dabei allerdings nicht mit dem Gelenk 22a, 22b verbunden.In this embodiment, the carrier elements 2a, 2b are each divided into two sections 2a_1 and 2a_2 or 2b_1 and 2b_2. The respective sections of a carrier element 2a, 2b are connected via a joint 22a and 22b. About that In addition, the support elements 2a, 2b are connected to a means 4 in the region of this joint 22a, 22b. However, the means 4 is not connected to the joint 22a, 22b.

Die beiden Trägerelemente 2a, 2b sind wie in Fig. 1 und Fig. 2 im als Gelenk dienendem Verbindungspunkt 7 miteinander und der Speiseleitung 1 verbunden. Zusätzlich sind die beide Trägerelemente 2a, 2b im Bereich des Verbindungspunkts 7 über ein Mittel 4 miteinander verbunden, wobei dieses Mittel 4 nicht mit dem Gelenk im Verbindungspunkt 7 verbunden ist.The two support elements 2a, 2b are as in Fig. 1 and Fig. 2 in serving as a joint connection point 7 with each other and the feed line 1 connected. In addition, the two support elements 2a, 2b are connected to each other in the region of the connection point 7 via a means 4, this means 4 is not connected to the joint in the connection point 7.

Der Übersicht wegen sind die Sendemittel 3 zwischen Trägerelement 2a, 2b und der Speiseleitung nur im unteren Teilbild (Betriebsstellung) von Fig. 3 gezeigt.Because of the overview, the transmitting means 3 between carrier element 2a, 2b and the feed line only in the lower part of the image (operating position) of Fig. 3 shown.

Werden die Mittel 4 mit Druck beaufschlagt, so nehmen diese den für sie energetisch günstigsten Zustand ein. In Fig. 3 ist dieser energetisch günstigste Zustand im Bereich der Gelenke 22a und 22b nahezu eine Gerade. Im Bereich des Verbindungspunkts 7 nahezu ein Halbkreis. Im Bereich der Gelenke 22a, 22b führt die Streckung der Mittel 4 dazu, dass die Teilstücke 2a_2 bzw. 2b_2 umklappen und eine Verlängerung der Teilstücke 2a_1 und 2b_1 bilden.
Nach einem ähnlichen Prinzip kann die Speiseleitung 1 ebenfalls im ein oder mehrere Teilstücke aufgeteilt werden.
Im Bereich des Verbindungspunkts 7 führt die Druckbeaufschlagung des dort angeordneten Mittels 4 ebenfalls zu einer Streckung wobei die beiden Trägerelemente 2a, 2b voneinander weggeführt werden. Dadurch wird gewährleistet, dass in der Betriebsstellung eine Zugspannung auf die Sendeelemente 3 einwirkt.If the means 4 pressurized, they take the energetically most favorable for them state. In Fig. 3 This energetically most favorable state in the region of the joints 22a and 22b is almost a straight line. In the region of the connection point 7 almost a semicircle. In the region of the joints 22a, 22b, the extension of the means 4 causes the sections 2a_2 and 2b_2 to fold over and form an extension of the sections 2a_1 and 2b_1.
According to a similar principle, the feed line 1 can also be divided into one or more sections.
In the region of the connection point 7, the pressurization of the means 4 arranged there also leads to an extension whereby the two support elements 2a, 2b are led away from one another. This ensures that a tensile stress acts on the transmitting elements 3 in the operating position.

Selbstverständlich können wie in Fig. 1 und Fig. 2 zusätzlich Federelemente zwischen den Sendeelementen 3 und den Trägermittel 2a, 2b angeordnet werden.Of course, as in Fig. 1 and Fig. 2 in addition spring elements between the transmitting elements 3 and the carrier means 2a, 2b are arranged.

Literaturliterature

http://www.wikiweise.de/wiki/Logarith misch-Periodische%20Dipolantennehttp://www.wikiweise.de/wiki/Logarith mixed-periodic% 20Dipolantenne

Claims (6)

  1. Foldable log-periodic antenna comprising:
    - a feed line (1),
    - a plurality of transmitting means (3) for transmitting and/or receiving electromagnetic signals,
    - two supporting elements (2a, 2b) for holding the transmitting means (3)
    - one or more means (4) for producing a tensile stress on the transmitting means (3),
    with the transmitting means (3) being connected to the feed line (1), and with the supporting elements (2a, 2b) being connected to the feed line (1) via an articulated joint apparatus (7), such that the antenna can be moved from a transport position to an operating position and vice versa, characterized
    in that the transmitting means (3) are fixed in each case via connecting points (8) between the supporting elements (2a, 2b) or in each case between the feed line (1) and one of the supporting elements (2a, 2b) and in that the supporting elements (2a, 2b) are in the form of flexible wires and in that the one or more means (4) for producing a tensile stress on the transmitting means (3) are in the form of a flexible tube, and can have an internal pressure applied to them and are connected to the supporting elements (2a, 2b) for holding the transmitting means (3).
  2. Foldable log-periodic antenna according to Claim 1, characterized in that the transmitting means (3) are in the form of stiff transmitting elements or flexible transmitting braids.
  3. Foldable log-periodic antenna according to Claim 2, characterized in that the transmitting means (3) are manufactured from a corrosion-resistant conductive material, for example stainless steel.
  4. Foldable log-periodic antenna according to Claim 3,
    characterized in that
    the supporting elements (2a, 2b) for holding the transmitting means (3) are manufactured from a non-conductive material, for example glass-fiber-reinforced plastics.
  5. Foldable log-periodic antenna according to one of the preceding claims,
    characterized in that
    one or more additional means (6) for producing a tensile stress on the transmitting means (3), for example one or more spring elements, is or are provided between the supporting element (2a, 2b) and the transmitting means (3), and/or between the feed line (1) and the transmitting means (3).
  6. Foldable log-periodic antenna according to one of the preceding claims,
    characterized in that
    the feed line (1) is a two-wire line or a stripline.
EP10741893.1A 2009-07-08 2010-06-24 Foldable log-periodic antenna Active EP2452398B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009032107A DE102009032107A1 (en) 2009-07-08 2009-07-08 Foldable logarithmic periodic antenna
PCT/DE2010/000748 WO2011003389A1 (en) 2009-07-08 2010-06-24 Foldable log-periodic antenna

Publications (2)

Publication Number Publication Date
EP2452398A1 EP2452398A1 (en) 2012-05-16
EP2452398B1 true EP2452398B1 (en) 2018-04-11

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EP10741893.1A Active EP2452398B1 (en) 2009-07-08 2010-06-24 Foldable log-periodic antenna

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US (1) US9007271B2 (en)
EP (1) EP2452398B1 (en)
DE (1) DE102009032107A1 (en)
IL (1) IL217075A (en)
WO (1) WO2011003389A1 (en)
ZA (1) ZA201108862B (en)

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CN205944392U (en) * 2016-08-24 2017-02-08 广东侨华科技有限公司 Antenna reflective network and antenna reflective network mounting structure
CN109149054B (en) * 2018-09-30 2023-11-14 北京大华恒威通信技术有限公司 Automatic folding log periodic antenna
CN111029712B (en) * 2019-12-20 2021-10-12 中国电波传播研究所（中国电子科技集团公司第二十二研究所） Automatic rotary log periodic antenna of exhibition receipts
CN113471679B (en) * 2021-06-27 2023-03-24 中国电波传播研究所（中国电子科技集团公司第二十二研究所） Quick-locking folding portable pair Zhou Tianxian vibrator and vibrator feed seat thereof
CN114101978B (en) * 2021-11-27 2023-10-20 中国电波传播研究所（中国电子科技集团公司第二十二研究所） Collecting line structure and manufacturing method thereof

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Also Published As

Publication number Publication date
EP2452398A1 (en) 2012-05-16
IL217075A (en) 2017-04-30
WO2011003389A1 (en) 2011-01-13
IL217075A0 (en) 2012-02-29
US20120133566A1 (en) 2012-05-31
DE102009032107A1 (en) 2011-03-24
US9007271B2 (en) 2015-04-14
ZA201108862B (en) 2012-08-29

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