EP2340585B1 - Portable dual-band antenna - Google Patents

Portable dual-band antenna Download PDF

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Publication number
EP2340585B1
EP2340585B1 EP09776826.1A EP09776826A EP2340585B1 EP 2340585 B1 EP2340585 B1 EP 2340585B1 EP 09776826 A EP09776826 A EP 09776826A EP 2340585 B1 EP2340585 B1 EP 2340585B1
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EP
European Patent Office
Prior art keywords
antenna
antenna element
matching network
coil
mhz
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EP09776826.1A
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German (de)
French (fr)
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EP2340585A1 (en
Inventor
Berthold Klos
Dietmar Leugner
Ludwig Nielsen
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Rohde and Schwarz GmbH and Co KG
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Rohde and Schwarz GmbH and Co KG
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Publication of EP2340585A1 publication Critical patent/EP2340585A1/en
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    • 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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
    • H01Q19/30—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
    • 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

Definitions

  • the invention relates to a dual band antenna, in particular a portable high frequency dual band antenna.
  • the EP 0 896 385 B1 shows an antenna which operates in two different frequency bands of 1.6 GHz and 2.4 GHz. It is composed of at least two antenna elements.
  • the two antenna elements are an elongated radiation element and a linear radiation element, which is arranged helically.
  • the two radiation elements form a common antenna, which is used for both frequency bands.
  • the antenna is rigid.
  • the document US 2008/0180334 A1 shows an adjustable monopole antenna.
  • the antenna works in a single frequency range.
  • the document EP 1 411 588 A1 shows a broadband antenna, which consists of several individual antenna elements. The antenna shown there also operates only in a single frequency range.
  • the document US 3,624,657 shows an adjustable dipole antenna. By adjusting the length of various elements of the dipole antenna, the reception characteristic can be influenced.
  • the antenna shown there also receives only in a single frequency range.
  • the document US 2008/0252535 A1 shows a foldable monopoly whip antenna.
  • the antenna consists of a foldable strip conductor which has a first antenna characteristic in the unfolded configuration and is connected in a folded configuration with its end by means of an inductance to a common base, and then has a second antenna characteristic.
  • the document US 3,163,863 shows an adjustable folded dipole antenna. By adjusting the lengths of two loops of the dipole antenna, the antenna characteristics can be influenced.
  • the document EP 0 637 093 A1 shows an antenna consisting of a first antenna element and a second antenna element.
  • a first antenna element is in the form of a conductor connected to a flexible rod, and connected to a resonance coil (trap coil).
  • the resonance coil is further connected to a second antenna element, which is also designed as a helical conductor.
  • the second antenna element can be connected to a radio device on its side facing away from the resonance coil.
  • Resonant coil is tuned to have a very high impedance at a certain resonant frequency, and thus to create a clean frequency gap in the receiving band of the entire antenna.
  • the document EP 1 926 175 A1 shows an antenna with a first antenna element and a second antenna element, which are separated by a resonance coil. Again, by increasing the impedance at the resonant frequency, a clean frequency gap is created in the receive band of the overall antenna. This facilitates the post-processing in different receiving paths.
  • the document EP 0 896 384 A2 shows a multi-band antenna in which a first antenna element is separated by a resonant circuit of a second antenna element.
  • the resonance circuit here consists of a parallel connection of an inductor and a capacitor.
  • the resonant circuit generates a significantly increased impedance at a resonant frequency and thus creates a clean frequency gap in the receive band of the antenna, which facilitates separation of the receive signal into different receive paths.
  • the document DE 847 302 C shows a flexible rod antenna consisting of a flexible tube with an attached radiator tip.
  • the antenna has a single continuous reception bandwidth.
  • the document US 7,312,758 B2 shows an antenna with adjustable reception gain.
  • a second extendable antenna element is arranged. In the retracted position, the antenna has a lower receive gain than in the extended state.
  • the document EP 1 542 314 A1 shows a three-dimensional omnidixed monopole antenna for broadband applications.
  • the monopole is formed as a three-dimensional cup-shaped structure, which influences the receiving characteristic by their specific shape.
  • the invention is based on the object of providing a robust, to provide portable antenna which operates with high quality in a very wide frequency range.
  • An antenna has two antenna elements which are connected to each other.
  • the first antenna element consists at least partially of at least one flexible metal band.
  • the second antenna element consists at least partially of a flexible corrugated pipe.
  • the first antenna element and the second antenna element together form a first sub-antenna, while the second antenna element alone forms a second sub-antenna.
  • the sub-antennas are each optimized for different frequency bands.
  • the first antenna element is connected by means of a coil to the second antenna element, which electrically connects the first antenna element for a low frequency range with the second antenna element and electrically separates from the second antenna element for a high frequency range.
  • the antenna can be connected to a radio only at the second antenna element at its end remote from the coil.
  • the first antenna element consists of a plurality of stacked metal strips which are held together.
  • the second antenna element preferably carries the first antenna element. This further increases the portability.
  • the antenna elements preferably have a common longitudinal axis. So a high stability with low weight is given.
  • the first sub-antenna is preferably optimized for a frequency band from 30 MHz to 88 MHz.
  • the second sub-antenna is preferably optimized for a frequency band from 200 MHz to 450 MHz.
  • an application of the antenna in the two aforementioned frequency bands is possible.
  • the antenna includes a matching network, which is preferably connected to the second antenna element.
  • the second antenna element is preferably connectable to the radio by means of the matching network. This allows optimal adaptation to the radio. When replacing the antenna, the matching network is automatically exchanged. This increases the reliability.
  • the matching network is arranged within the corrugated pipe. This reduces the space requirement and thus increases the portability.
  • the matching network preferably adjusts the impedance of the antenna to the impedance of the radio.
  • the adaptation preferably takes place as a function of the frequency of transmitted signals. This ensures optimal interaction between the antenna and the radio.
  • the first antenna element advantageously has a length of 600 mm to 1200 mm, preferably from 700 mm to 1000 mm, particularly preferably 800 mm. This allows favorable high frequency characteristics. Furthermore, it allows the entrainment of the antenna.
  • the second antenna element advantageously has a length of 300 mm to 700 mm, preferably of 400 mm to 600 mm, particularly preferably of 500 mm. This allows favorable high frequency characteristics. Furthermore, it allows the antenna to be carried by a person.
  • FIG. 1 First, the basic operation of the antenna according to the invention will be explained. Based on Fig. 2-8 the construction and operation of various embodiments of the antenna according to the invention is shown. It is based on the Fig. 2 the general structure described before by means of the Fig. 3-5 individual details of the first and a second embodiment are illustrated. A third Embodiment is in the Fig. 6-8 shown. Identical elements have not been repeatedly shown and described in similar figures.
  • FIG. 1 a schematic representation of an antenna according to the invention is shown.
  • a first antenna element 30 has a large extent along its longitudinal axis. It is connected via a coil 31 to a second antenna element 32.
  • the second antenna element 32 also has a large extent along its longitudinal axis.
  • the longitudinal axis of the two antenna elements 30, 32 are largely identical.
  • the second antenna element 32 is connectable at its lower end to a radio.
  • the second antenna element 32 forms a separate sub-antenna. This is achieved in that the coil 31 strongly attenuates the transmission of high frequencies between the two antenna elements 30, 32. Thus, high-frequency signals received by the first antenna element 30 can not be transmitted to the radio. However, the high frequency signals received by the second antenna element 32 may be received by the radio.
  • the first antenna element 30 and the second antenna element 32 together form a further sub-antenna.
  • This sub-antenna only receives low-frequency signals. These signals are attenuated much weaker by the coil 31. These signals can also be received by the radio.
  • Fig. 2 shows a first embodiment of the antenna according to the invention 1.
  • the antenna 1 consists of a first antenna element 3, a connecting element 4, a second antenna element 5 and a matching network 6.
  • the first antenna element 3 consists of several metal strips, which are stacked one above the other and, for example, from a plastic shell held together.
  • the length of the first Aritennenelements 3 is shown shortened in the drawing.
  • the antenna 1 is so resistant to damage by kinking. Furthermore, such a metal strip can be folded or rolled for transport.
  • the first antenna element 3 has a length 50 of 800mm in this embodiment. However, a length of 600mm to 1200mm would also be usable.
  • the first antenna element 3 is connected to the second antenna element 5 by means of the connecting element 4.
  • the second antenna element here has a length 51 of 500 mm. This includes the length of the matching network 6 and part of the connecting element 4. However, a length of 300mm to 700mm would also be usable.
  • the second antenna element 5 is made from a flexible corrugated tube.
  • the connecting element 4 contains the basis of Fig. 1
  • the second antenna element 5 is connected by means of the matching network 6 to the terminal 7 of the radio device 2 to the radio body 8.
  • the radio 2 is not part of the antenna 1 according to the invention.
  • the antenna elements 3, 5 are wrapped to protect against damage and corrosion with a plastic protective cover.
  • This envelope is at least as flexible as the respective antenna element.
  • the protective cover can be made removable.
  • Fig. 3 a first detail of the first embodiment of the antenna according to the invention is shown. Based on this detail, the connecting element 4 between the antenna elements 3, 5 will be explained. It consists of a first holder 17, which is connected by means of the fastening means 16 fixed to the first antenna element 3 and from a second bracket 18 which is fixedly connected to the second antenna element 5.
  • the second holder 18 contains the coil 15, which is the coil 31 Fig. 1 equivalent.
  • the one end of the coil 15 is connected to the lower end of the first antenna element 3.
  • the other end of the coil 15 is connected to the upper end of the second antenna element 5.
  • Fig. 4 shows a second detail of the first embodiment of the antenna according to the invention.
  • the matching network 6 always consists of a housing 22 and a matching circuit 21.
  • the housing 22 connects the radio 2 to the second antenna element 20.
  • the matching circuit 21 is connected via the terminal 7 of the radio 2 with the radio body. 8 connected. Furthermore, the matching circuit 21 is connected to the second antenna element 20.
  • the matching circuit 21 performs an impedance matching.
  • the impedance of the antenna 1 is adapted to the impedance of the terminal 7 of the radio device 2.
  • the second antenna element 20 is a corrugated tube.
  • a corrugated tube is characterized by a limited flexibility with high stability.
  • the second antenna element 20 can be bend, for example, up to a bending angle of 45 °. Due to its elastic properties it returns by itself to its starting position.
  • Fig. 5 a detail of a second embodiment of the antenna according to the invention is shown.
  • a side sectional view through the corrugated tube 20 is shown in an alternative embodiment.
  • the matching network 44 is disposed within the corrugated tube 20.
  • an additional housing of the matching network 44 can be dispensed with.
  • the corrugated tube 20 is extended accordingly by the length of the matching network.
  • the corrugated tube 20 and the matching network 44 are mounted on a base plate 40.
  • the base plate is connected via the terminal 7 of the radio 2 to the radio Kärper 8.
  • the housing 42 of the matching network 44 is in direct contact with the base plate. However, it is mounted at a distance from the corrugated tube 20 so as not to reduce the flexibility of the corrugated tube 20.
  • a matching circuit 43 within the matching network 44 is connected to the terminal 7 and via the line 41 to the lower end of the corrugated tube 20.
  • the function of the matching network 44 corresponds to the function of the matching network 6 Fig. 4 ,
  • Fig. 6 to 8 show a third embodiment of the antenna according to the invention. Matching elements are denoted by the same reference numerals, so that a repetitive description is unnecessary.
  • Fig. 6 shows a perspective view while Fig. 7 a side view and Fig. 8 show a front view.
  • a special feature of the third embodiment is that the first antenna element 3 of several flexible metal bands 50, 51 are joined together, which are held together or compressed by two screw 52 and 53.
  • the connecting element 4 like the base element 54, consists of a cup-shaped body into which the second antenna element 5 is inserted as a corrugated tube. Further, the terminal 7 is designed as a coaxial connector with screwable outer connector.
  • the invention is not limited to the illustrated embodiment. As already mentioned, different lengths of the antenna elements can be used. Also, a combination of more than two antenna elements by means of coils is possible. All features described above or features shown in the figures can be combined with each other in any advantageous manner within the scope of the invention.

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Description

Die Erfindung betrifft eine Zweiband-Antenne, insbesondere eine tragbare Hochfrequenz-Zweiband-Antenne.The invention relates to a dual band antenna, in particular a portable high frequency dual band antenna.

Herkömmlich werden für unterschiedliche Frequenzbänder unterschiedliche Funkgeräte mit unterschiedlichen Antennen eingesetzt. Dies ist jedoch nachteilhaft, da lediglich eine geringe Flexibilität des Einsatzes besteht.Conventionally, different radios with different antennas are used for different frequency bands. However, this is disadvantageous since there is only little flexibility of the insert.

Die EP 0 896 385 B1 zeigt eine Antenne, welche in zwei verschiedenen Frequenzbändern von 1,6 GHz und von 2,4 GHz arbeitet. Sie ist aus zumindest zwei Antennenelementen zusammengesetzt. Die beiden Antennenelemente sind dabei ein gestrecktes Strahlungselement und ein lineares Strahlungselement, welches wendelförmig angeordnet ist. Die beiden Strahlungselemente bilden dabei eine gemeinsame Antenne, welche für beide Frequenzbänder genutzt wird. Die Antenne ist starr aufgebaut.The EP 0 896 385 B1 shows an antenna which operates in two different frequency bands of 1.6 GHz and 2.4 GHz. It is composed of at least two antenna elements. The two antenna elements are an elongated radiation element and a linear radiation element, which is arranged helically. The two radiation elements form a common antenna, which is used for both frequency bands. The antenna is rigid.

Das Dokument US 2008/0180334 A1 zeigt eine einstellbare Monopol-Antenne. Die Antenne arbeitet in einem einzigen Frequenzbereich.The document US 2008/0180334 A1 shows an adjustable monopole antenna. The antenna works in a single frequency range.

Das Dokument EP 1 411 588 A1 zeigt eine Breitbandantenne, welche aus mehreren einzelnen Antennen-Elementen besteht. Die dort gezeigte Antenne arbeitet ebenfalls lediglich in einem einzigen Frequenzbereich.The document EP 1 411 588 A1 shows a broadband antenna, which consists of several individual antenna elements. The antenna shown there also operates only in a single frequency range.

Das Dokument US 3,624,657 zeigt eine einstellbare Dipol-Antenne. Durch die Einstellung der Länge verschiedener Elemente der Dipol-Antenne lässt sich die Empfangscharakteristik beeinflussen. Die dort gezeigte Antenne empfängt ebenfalls lediglich in einem einzelnen Frequenzbereich.The document US 3,624,657 shows an adjustable dipole antenna. By adjusting the length of various elements of the dipole antenna, the reception characteristic can be influenced. The antenna shown there also receives only in a single frequency range.

Das Dokument US 2008/0252535 A1 zeigt eine faltbare Monopol-Peitschen-Antenne. Die Antenne besteht aus einem faltbaren Bandleiter, welcher in ausgefalteter Konfiguration eine erste Antennencharakteristik aufweist, und in einer eingefalteten Konfiguration mit seinem Ende mittels einer Induktivität mit einer gemeinsamen Basis verbunden ist, und dann eine zweite Antennencharakteristik aufweist.The document US 2008/0252535 A1 shows a foldable monopoly whip antenna. The antenna consists of a foldable strip conductor which has a first antenna characteristic in the unfolded configuration and is connected in a folded configuration with its end by means of an inductance to a common base, and then has a second antenna characteristic.

Das Dokument US 3,163,863 zeigt eine einstellbare gefaltete Dipol-Antenne. Durch Einstellung der Längen zweier Schlaufen der Dipol Antenne kann die Antennencharakteristik beeinflusst werden.The document US 3,163,863 shows an adjustable folded dipole antenna. By adjusting the lengths of two loops of the dipole antenna, the antenna characteristics can be influenced.

Das Dokument EP 0 637 093 A1 zeigt eine Antenne bestehend aus einem ersten Antennenelement und einem zweiten Antennenelement. Ein erstes Antennenelement ist dabei in Form eines um einen flexiblen Stab gebundenen Leiters ausgebildet, und mit einer Resonanzspule (trap coil) verbunden. Die Resonanzspule ist weiterhin mit einem zweiten Antennenelement verbunden, welches ebenso als gewundener Leiter ausgeführt ist. Das zweite Antennenelement ist an seiner der Resonanzspule abgewandten Seite mit einem Funkgerät verbindbar. DieThe document EP 0 637 093 A1 shows an antenna consisting of a first antenna element and a second antenna element. A first antenna element is in the form of a conductor connected to a flexible rod, and connected to a resonance coil (trap coil). The resonance coil is further connected to a second antenna element, which is also designed as a helical conductor. The second antenna element can be connected to a radio device on its side facing away from the resonance coil. The

Resonanzspule ist abgestimmt, um bei einer bestimmten Resonanzfrequenz eine sehr hohe Impedanz aufzuweisen, und somit eine saubere Frequenz-Lücke in dem Empfangsband der gesamten Antenne zu erzeugen.Resonant coil is tuned to have a very high impedance at a certain resonant frequency, and thus to create a clean frequency gap in the receiving band of the entire antenna.

Das Dokument EP 1 926 175 A1 zeigt eine Antenne mit einem ersten Antennenelement und einem zweiten Antennenelement, welche durch eine Resonanz-Spule voneinander getrennt sind. Auch hier wird durch Erhöhung.der Impedanz bei der Resonanzfrequenz eine saubere Frequenz-Lücke in das Empfangsband der Gesamtantenne erzeugt. Dies erleichtert die Nachverarbeitung in verschiedenen Empfangspfaden.The document EP 1 926 175 A1 shows an antenna with a first antenna element and a second antenna element, which are separated by a resonance coil. Again, by increasing the impedance at the resonant frequency, a clean frequency gap is created in the receive band of the overall antenna. This facilitates the post-processing in different receiving paths.

Das Dokument EP 0 896 384 A2 zeigt eine Multiband-Antenne, bei welcher ein erstes Antennenelement mittels einer Resonanzschaltung von einem zweiten Antennenelement getrennt ist. Die Resonanzschaltung besteht hier aus einer Parallelschaltung einer Induktivität und einer Kapazität. Die Resonanzschaltung erzeugt bei einer Resonanzfrequenz eine signifikant erhöhte Impedanz und erzeugt somit eine saubere Frequenz-Lücke im Empfangsband der Antenne, was die Trennung des Empfangssignals auf verschiedene Empfangspfade erleichtert.The document EP 0 896 384 A2 shows a multi-band antenna in which a first antenna element is separated by a resonant circuit of a second antenna element. The resonance circuit here consists of a parallel connection of an inductor and a capacitor. The resonant circuit generates a significantly increased impedance at a resonant frequency and thus creates a clean frequency gap in the receive band of the antenna, which facilitates separation of the receive signal into different receive paths.

Das Dokument US 6 297 711 B1 zeigt eine Antenne bestehend aus einem einzigen gewundenen Draht. Der Draht ist in unterschiedlichen Bereichen der Antenne mit einer unterschiedlich großen Steigung gewunden. Hierdurch wird eine gewisse Frequenzselektivität des Empfangs erreicht.The document US Pat. No. 6,297,711 B1 shows an antenna consisting of a single twisted wire. The wire is wound in different areas of the antenna with a different pitch. This will achieved a certain frequency selectivity of the reception.

Das Dokument DE 847 302 C zeigt eine biegsame Stabantenne bestehend aus einem biegsamen Rohr mit einer aufgesetzten Strahlerspitze. Die Antenne weist dabei eine einzige durchgängige Empfangsbandbreite auf.The document DE 847 302 C shows a flexible rod antenna consisting of a flexible tube with an attached radiator tip. The antenna has a single continuous reception bandwidth.

Das Dokument US 7,312,758 B2 zeigt eine Antenne mit einstellbarer Empfangsverstärkung. Innerhalb eines hohl ausgeführten ersten Antennenelements ist ein zweites ausfahrbares Antennenelement angeordnet. In der eingefahrenen Position weist die Antenne eine geringere Empfangsverstärkung auf als in dem ausgefahrenen Zustand.The document US 7,312,758 B2 shows an antenna with adjustable reception gain. Within a hollow executed first antenna element, a second extendable antenna element is arranged. In the retracted position, the antenna has a lower receive gain than in the extended state.

Das Dokument EP 1 542 314 A1 zeigt eine dreidimensionale omnidixektionale Monopol-Antenne für Breitbandanwendungen. Der Monopol ist dabei als dreidimensionale Becherförmige Struktur ausgeformt, welche durch ihre spezifische Formgebung die Empfangscharakteristik beeinflusst.The document EP 1 542 314 A1 shows a three-dimensional omnidixed monopole antenna for broadband applications. The monopole is formed as a three-dimensional cup-shaped structure, which influences the receiving characteristic by their specific shape.

Der Erfindung liegt die Aufgabe zu Grunde, eine robuste, tragbare Antenne zu schaffen, welche mit hoher Güte in einem sehr breiten Frequenzbereich arbeitet.The invention is based on the object of providing a robust, to provide portable antenna which operates with high quality in a very wide frequency range.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des unabhängigen Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der hierauf rückbezogenen Unteransprüche.The object is achieved by the features of independent claim 1. Advantageous developments are the subject of the dependent claims.

Eine Antenne verfügt über zwei Antennenelemente, welche miteinander verbunden sind. Das erste Antennenelement besteht zumindest zum Teil aus zumindest einem flexiblen Metallband. Das zweite Antennenelement besteht zumindest zum Teil aus einem flexiblen Wellrohr. Das erste Antennenelement und das zweite Antennenelement bilden gemeinsam eine erste Teil-Antenne, während das zweite Antennenelement alleine eine zweite Teil-Antenne bildet. Vorteilhafterweise sind die Teil-Antennen jeweils für unterschiedliche Frequenzbänder optimiert. Das erste Antennenelement ist mittels einer Spule mit dem zweiten Antennenelement verbunden, welche das erste Antennenelement für einen niedrigen Frequenzbereich elektrisch mit dem zweiten Antennenelement verbindet und für einen hohen Frequenzbereich elektrisch von dem zweiten Antennenelement trennt. Die Antenne ist nur an dem zweiten Antennenelement an seinem der Spule abgewandten Ende mit einem Funkgerät verbindbar. Das erste Antennenelement besteht aus mehreren übereinander geschichteten Metallstreifen, die zusammengehalten werden.An antenna has two antenna elements which are connected to each other. The first antenna element consists at least partially of at least one flexible metal band. The second antenna element consists at least partially of a flexible corrugated pipe. The first antenna element and the second antenna element together form a first sub-antenna, while the second antenna element alone forms a second sub-antenna. Advantageously, the sub-antennas are each optimized for different frequency bands. The first antenna element is connected by means of a coil to the second antenna element, which electrically connects the first antenna element for a low frequency range with the second antenna element and electrically separates from the second antenna element for a high frequency range. The antenna can be connected to a radio only at the second antenna element at its end remote from the coil. The first antenna element consists of a plurality of stacked metal strips which are held together.

So ist eine große Robustheit der Antenne gewährleistet. Gleichzeitig ist die Tragbarkeit gewährleistet. Auch eine hohe Güte ist gegeben. Ein Einsatz der Antenne in einem breiten Frequenzbereich ist so möglich. Eine hohe Güte der Auf zwei getrennte Antennen für unterschiedliche Frequenzbereiche kann so verzichtet werden.This ensures a high degree of robustness of the antenna. At the same time the portability is guaranteed. Also a high quality is given. An application of the antenna in a wide frequency range is possible. A high quality of On two separate antennas for different frequency ranges can be dispensed with.

Das zweite Antennenelement trägt bevorzugt das erste Antennenelement. Dies erhöht weiterhin die Tragbarkeit.The second antenna element preferably carries the first antenna element. This further increases the portability.

Bevorzugt weisen die Antennenelemente eine gemeinsame Längsachse auf. So ist eine hohe Stabilität bei geringem Gewicht gegeben.The antenna elements preferably have a common longitudinal axis. So a high stability with low weight is given.

Die erste Teil-Antenne ist bevorzugt für ein Frequenzband von 30 MHz bis 88 MHz optimiert. Die zweite Teil-Antenne ist bevorzugt für ein Frequenzband von 200 MHz bis 450 MHz optimiert. So ist ein Einsatz der Antenne in den beiden genannten Frequenz-Bändern möglich.The first sub-antenna is preferably optimized for a frequency band from 30 MHz to 88 MHz. The second sub-antenna is preferably optimized for a frequency band from 200 MHz to 450 MHz. Thus, an application of the antenna in the two aforementioned frequency bands is possible.

Vorteilhafterweise beinhaltet die Antenne ein Anpassnetzwerk, welches bevorzugt mit dem zweiten Antennenelement verbunden ist. Das zweite Antennenelement ist bevorzugt mittels des Anpassnetzwerks mit dem Funkgerät verbindbar. So ist eine optimale Anpassung an das Funkgerät möglich. Bei einem Austausch der Antenne wird automatisch auch das zugehörige Anpassnetzwerk ausgetauscht. Dies erhöht die Zuverlässigkeit.Advantageously, the antenna includes a matching network, which is preferably connected to the second antenna element. The second antenna element is preferably connectable to the radio by means of the matching network. This allows optimal adaptation to the radio. When replacing the antenna, the matching network is automatically exchanged. This increases the reliability.

Vorteilhafterweise ist das Anpassnetzwerk innerhalb des Wellrohrs angeordnet. Dies verringert den Platzbedarf und erhöht damit die Tragbarkeit.Advantageously, the matching network is arranged within the corrugated pipe. This reduces the space requirement and thus increases the portability.

Das Anpassnetzwerk passt bevorzugt die Impedanz der Antenne an die Impedanz des Funkgeräts an. Die Anpassung erfolgt bevorzugt in Abhängigkeit der Frequenz übertragener Signale. So wird ein optimales Zusammenspiel der Antenne und des Funkgeräts gewährleistet.The matching network preferably adjusts the impedance of the antenna to the impedance of the radio. The adaptation preferably takes place as a function of the frequency of transmitted signals. This ensures optimal interaction between the antenna and the radio.

Das erste Antennenelement weist vorteilhafterweise eine Länge von 600mm bis 1200mm, bevorzugt von 700mm bis 1000mm, besonders bevorzugt von 800mm auf. Dies ermöglicht günstige Hochfrequenzeigenschaften. Weiterhin ermöglicht es das Mitführen der Antenne.The first antenna element advantageously has a length of 600 mm to 1200 mm, preferably from 700 mm to 1000 mm, particularly preferably 800 mm. This allows favorable high frequency characteristics. Furthermore, it allows the entrainment of the antenna.

Das zweite Antennenelement weist vorteilhafterweise eine Länge von 300mm bis 700mm, bevorzugt von 400mm bis 600mm, besonders bevorzugt von 500mm auf. Dies ermöglicht günstige Hochfrequenzeigenschaften. Weiterhin ermöglicht es das Mitführen der Antenne durch eine Person.The second antenna element advantageously has a length of 300 mm to 700 mm, preferably of 400 mm to 600 mm, particularly preferably of 500 mm. This allows favorable high frequency characteristics. Furthermore, it allows the antenna to be carried by a person.

Nachfolgend wird die Erfindung anhand der Zeichnung, in der ein vorteilhaftes Ausführungsbeispiel der Erfindung dargestellt ist, beispielhaft beschrieben. In der Zeichnung zeigen:

Fig. 1
eine schematische Darstellung einer erfindungsgemäßen Antenne;
Fig. 2
ein erstes Ausführungsbeispiel der erfindungsgemäßen Antenne;
Fig. 3
ein Detail des ersten Ausführungsbeispiels der erfindungsgemäßen Antenne;
Fig. 4
ein weiteres Detail des ersten Ausführungsbeispiels der erfindungsgemäßen Antenne;
Fig. 5
ein Detail eines zweiten Ausführungsbeispiels der erfindungsgemäßen Antenne im Bereich des Steckverbinders;
Fig. 6
ein drittes Ausführungsbeispiel der erfindungsgemäßen Antenne in einer perspektivischer Darstellung;
Fig. 7
das dritte Ausführungsbeispiel der Antenne in einer Seitenansicht, und
Fig. 8
das dritte Ausführurigsbeispiel der Antenne in einer Vorderansicht.
The invention will be described by way of example with reference to the drawing, in which an advantageous embodiment of the invention is shown. In the drawing show:
Fig. 1
a schematic representation of an antenna according to the invention;
Fig. 2
a first embodiment of the antenna according to the invention;
Fig. 3
a detail of the first embodiment of the antenna according to the invention;
Fig. 4
another detail of the first embodiment of the antenna according to the invention;
Fig. 5
a detail of a second embodiment of the antenna according to the invention in the region of the connector;
Fig. 6
a third embodiment of the antenna according to the invention in a perspective view;
Fig. 7
the third embodiment of the antenna in a side view, and
Fig. 8
the third Ausführurigsbeispiel the antenna in a front view.

Mittels der Fig. 1 wird zunächst die prinzipielle Funktionsweise der erfindungsgemäßen Antenne erläutert. Anhand der Fig. 2 - 8 wird der Aufbau und die Funktionsweise verschiedener Ausführungsbeispiele der erfindungsgemäßen Antenne gezeigt. Dabei wird anhand der Fig. 2 der generelle Aufbau geschildert, bevor mittels der Fig. 3 - 5 einzelne Details des ersten bzw. eines zweiten Ausführungsbeispiels verdeutlicht werden. Ein drittes Ausführungsbeispiel ist in den Fig. 6 - 8 gezeigt. Identische Elemente wurden in ähnlichen Abbildungen zum Teil nicht wiederholt dargestellt und beschrieben.By means of Fig. 1 First, the basic operation of the antenna according to the invention will be explained. Based on Fig. 2-8 the construction and operation of various embodiments of the antenna according to the invention is shown. It is based on the Fig. 2 the general structure described before by means of the Fig. 3-5 individual details of the first and a second embodiment are illustrated. A third Embodiment is in the Fig. 6-8 shown. Identical elements have not been repeatedly shown and described in similar figures.

In Fig. 1 wird eine schematische Darstellung einer erfindungsgemäßen Antenne gezeigt. Ein erstes Antennenelement 30 verfügt über eine große Ausdehnung entlang seiner Längsachse. Es ist über eine Spule 31 mit einem zweiten Antennenelement 32 verbunden. Auch das zweite Antennenelement 32 verfügt über eine große Ausdehnung entlang seiner Längsachse. Die Längsachse der beiden Antennenelemente 30, 32 sind weitgehend identisch. Das zweite Antennenelement 32 ist dabei an seinem unteren Ende mit einem Funkgerät verbindbar.In Fig. 1 a schematic representation of an antenna according to the invention is shown. A first antenna element 30 has a large extent along its longitudinal axis. It is connected via a coil 31 to a second antenna element 32. The second antenna element 32 also has a large extent along its longitudinal axis. The longitudinal axis of the two antenna elements 30, 32 are largely identical. The second antenna element 32 is connectable at its lower end to a radio.

Zum einen bildet das zweite Antennenelement 32 eine eigene Teil-Antenne. Dies wird dadurch erreicht, dass die Spule 31 die Übertragung hoher Frequenzen zwischen den beiden Antennenelementen 30, 32 stark dämpft. So können von dem ersten Antennenelement 30 empfangene Signale hoher Frequenzen nicht zu dem Funkgerät übertragen werden. Die von dem zweiten Antennenelement 32 empfangenen Signale hoher Frequenzen können jedoch von dem Funkgerät empfangen werden.On the one hand, the second antenna element 32 forms a separate sub-antenna. This is achieved in that the coil 31 strongly attenuates the transmission of high frequencies between the two antenna elements 30, 32. Thus, high-frequency signals received by the first antenna element 30 can not be transmitted to the radio. However, the high frequency signals received by the second antenna element 32 may be received by the radio.

Zum anderen bilden das erste Antennenelement 30 und das zweite Antennenelement 32 gemeinsam eine weitere Teil-Antenne. Diese Teil-Antenne empfängt lediglich Signale geringer Frequenzen. Diese Signale werden von der Spule 31 deutlich schwächer gedämpft. Auch diese Signale können damit von dem Funkgerät empfangen werden.On the other hand, the first antenna element 30 and the second antenna element 32 together form a further sub-antenna. This sub-antenna only receives low-frequency signals. These signals are attenuated much weaker by the coil 31. These signals can also be received by the radio.

Fig. 2 zeigt ein erstes Ausführungsbeispiel der erfindungsgemäßen Antenne 1. Die Antenne 1 besteht aus einem ersten Antennenelement 3, einem Verbindungselement 4, einem zweiten Antennenelement 5 und einem Anpassnetzwerk 6. Das erste Antennenelement 3 besteht aus mehreren Metallstreifen, welche übereinander geschichtet sind und z.B. von einer Kunststoffhülle zusammengehalten werden. Die Länge des ersten Aritennenelements 3 ist in der Zeichnung verkürzt dargestellt. Durch den Einsatz eines biegsamen Metallstreifens wird eine große Robustheit erzielt. Die Antenne 1 ist so resistent gegen Beschädigungen durch Abknicken. Weiterhin kann ein solcher Metallstreifen zum Transport gefaltet oder gerollt werden. Das erste Antennenelement 3 hat in diesem Ausführungsbeispiel eine Länge 50 von 800mm. Eine Länge von 600mm bis 1200mm wäre jedoch ebenso einsetzbar. Fig. 2 shows a first embodiment of the antenna according to the invention 1. The antenna 1 consists of a first antenna element 3, a connecting element 4, a second antenna element 5 and a matching network 6. The first antenna element 3 consists of several metal strips, which are stacked one above the other and, for example, from a plastic shell held together. The length of the first Aritennenelements 3 is shown shortened in the drawing. By using a flexible metal strip a great robustness is achieved. The antenna 1 is so resistant to damage by kinking. Furthermore, such a metal strip can be folded or rolled for transport. The first antenna element 3 has a length 50 of 800mm in this embodiment. However, a length of 600mm to 1200mm would also be usable.

Das erste Antennenelement 3 ist mittels des Verbindungselements 4 mit dem zweiten Antennenelement 5 verbundene. Das zweite Antennenelement weist hier eine Länge 51 von 500mm auf. Dies beinhaltet die Länge des Anpassnetzwerks 6 und eines Teils des Verbindungselements 4. Eine Länge von 300mm bis 700mm wäre jedoch ebenso einsetzbar. Das zweite Antennenelement 5 besteht aus einem flexiblen Wellrohr.The first antenna element 3 is connected to the second antenna element 5 by means of the connecting element 4. The second antenna element here has a length 51 of 500 mm. This includes the length of the matching network 6 and part of the connecting element 4. However, a length of 300mm to 700mm would also be usable. The second antenna element 5 is made from a flexible corrugated tube.

Auf das Wellrohr wird anhand der Fig. 4 näher eingegangen.On the corrugated tube is based on the Fig. 4 discussed in more detail.

Das Verbindungselement 4 enthält dabei die anhand von Fig. 1 beschriebene Spule 31. Das zweite Antennenelement 5 ist mittels des Anpassnetzwerks 6 an den Anschluss 7 des Funkgeräts 2 mit dem Funkgerät-Körper 8 verbunden. Das Funkgerät 2 ist dabei nicht Teil der erfindungsgemäßen Antenne 1.The connecting element 4 contains the basis of Fig. 1 The second antenna element 5 is connected by means of the matching network 6 to the terminal 7 of the radio device 2 to the radio body 8. The radio 2 is not part of the antenna 1 according to the invention.

Die Antennenelemente 3, 5 sind zum Schutz vor Beschädigung und vor Korrosion mit einer Schutzhülle aus Kunststoff umhüllt. Diese Hülle ist zumindest so flexibel wie das jeweilige Antennenelement. Die Schutzhülle kann dabei abnehmbar ausgeführt sein.The antenna elements 3, 5 are wrapped to protect against damage and corrosion with a plastic protective cover. This envelope is at least as flexible as the respective antenna element. The protective cover can be made removable.

In Fig. 3 wird ein erstes Detail des ersten Ausführungsbeispiels der erfindungsgemäßen Antenne dargestellt. Anhand dieses Details wird das Verbindungselement 4 zwischen den Antennenelementen 3, 5 erläutert. Es besteht aus einer ersten Halterung 17, welche mittels der Befestigungsmittel 16 fest mit dem ersten Antennenelement 3 verbunden ist und aus einer zweiten Halterung 18, welche fest mit dem zweiten Antennenelement 5 verbunden ist.In Fig. 3 a first detail of the first embodiment of the antenna according to the invention is shown. Based on this detail, the connecting element 4 between the antenna elements 3, 5 will be explained. It consists of a first holder 17, which is connected by means of the fastening means 16 fixed to the first antenna element 3 and from a second bracket 18 which is fixedly connected to the second antenna element 5.

Die zweite.Halterung 18 beinhaltet dabei die Spule 15, welche der Spule 31 aus Fig. 1 entspricht. Das eine Ende der Spule 15 ist dabei an das untere Ende des ersten Antennenelements 3 angeschlossen. Das andere Ende der Spule 15 ist dabei an das obere Ende des zweiten Antennenelements 5 angeschlossen.The second holder 18 contains the coil 15, which is the coil 31 Fig. 1 equivalent. The one end of the coil 15 is connected to the lower end of the first antenna element 3. The other end of the coil 15 is connected to the upper end of the second antenna element 5.

Fig. 4 zeigt ein zweites Detail des ersten Ausführungsbeispiels der erfindungsgemäßen Antenne. Anhand dieses Details wird das Anpassnetzwerk 6 zwischen dem zweiten Antennenelement 5 und dem Funkgerät 2 erläutert. Das Anpassnetzwerk 6 besteht dabei stets aus einem Gehäuse 22 und einer Anpass-Schaltung 21. Das Gehäuse 22 verbindet dabei das Funkgerät 2 mit dem zweiten Antennenelement 20. Die Anpass-Schaltung 21 ist über den Anschluss 7 des Funkgeräts 2 mit dem Funkgerät-Körper 8 verbunden. Weiterhin ist die Anpass-Schaltung 21 mit dem zweiten Antennenelement 20 verbunden. Die Anpass-Schaltung 21 führt dabei eine Impedanz-Anpassung durch. Die Impedanz der Antenne 1 wird dabei an die Impedanz des Anschlusses 7 des Funkgeräts 2 angepasst. Fig. 4 shows a second detail of the first embodiment of the antenna according to the invention. Based on this detail, the matching network 6 between the second antenna element 5 and the radio 2 will be explained. The matching network 6 always consists of a housing 22 and a matching circuit 21. The housing 22 connects the radio 2 to the second antenna element 20. The matching circuit 21 is connected via the terminal 7 of the radio 2 with the radio body. 8 connected. Furthermore, the matching circuit 21 is connected to the second antenna element 20. The matching circuit 21 performs an impedance matching. The impedance of the antenna 1 is adapted to the impedance of the terminal 7 of the radio device 2.

Es handelt sich bei dem zweiten Antennenelement 20 um ein Wellrohr. Ein Wellrohr zeichnet sich durch eine begrenzte Flexibilität bei hoher Stabilität aus. Das zweite Antennenelement 20 lässt sich
so z.B. bis zu einem Biegewinkel von 45° verbiegen. Aufgrund seiner elastischen Eigenschaften kehrt es von alleine in seine Ausgangsposition zurück.The second antenna element 20 is a corrugated tube. A corrugated tube is characterized by a limited flexibility with high stability. The second antenna element 20 can be
bend, for example, up to a bending angle of 45 °. Due to its elastic properties it returns by itself to its starting position.

In Fig. 5 wird ein Detail eines zweiten Ausführungsbeispiels der erfindungsgemäßen Antenne dargestellt. Hier wird eine seitliche Schnittdarstellung durch das Wellrohr 20 in einem alternativen Ausführungsbeispiel gezeigt. In diesem Ausführungsbeispiel ist das Anpassnetzwerk 44 innerhalb des Wellrohrs 20 angeordnet. So kann auf ein zusätzliches Gehäuse des Anpassnetzwerks 44 verzichtet werden. Das Wellrohr 20 wird entsprechend um die Länge des Anpassnetzwerks verlängert.In Fig. 5 a detail of a second embodiment of the antenna according to the invention is shown. Here is a side sectional view through the corrugated tube 20 is shown in an alternative embodiment. In this embodiment, the matching network 44 is disposed within the corrugated tube 20. Thus, an additional housing of the matching network 44 can be dispensed with. The corrugated tube 20 is extended accordingly by the length of the matching network.

Das Wellrohr 20 und das Anpassnetzwerk 44 sind auf einer Grundplatte 40 befestigt. Die Grundplatte ist über den Anschluss 7 des Funkgeräts 2 mit dem Funkgerät-Kärper 8 verbunden. Das Gehäuse 42 des Anpassnetzwerks 44 steht dabei in direktem Kontakt zu der Grundplatte. Es ist jedoch mit einem Abstand zu dem Wellrohr 20 montiert, um die Flexibilität des Wellrohrs 20 nicht zu reduzieren.The corrugated tube 20 and the matching network 44 are mounted on a base plate 40. The base plate is connected via the terminal 7 of the radio 2 to the radio Kärper 8. The housing 42 of the matching network 44 is in direct contact with the base plate. However, it is mounted at a distance from the corrugated tube 20 so as not to reduce the flexibility of the corrugated tube 20.

Eine Anpass-Schaltung 43 innerhalb des Anpassnetzwerks 44 ist mit dem Anschluss 7 und über die Leitung 41 mit dem unteren Ende des Wellrohrs 20 verbunden. Die Funktion des Anpassnetzwerks 44 entspricht der Funktion des Anpassnetzwerks 6 aus Fig. 4.A matching circuit 43 within the matching network 44 is connected to the terminal 7 and via the line 41 to the lower end of the corrugated tube 20. The function of the matching network 44 corresponds to the function of the matching network 6 Fig. 4 ,

Die Fig. 6 bis 8 zeigen ein drittes Ausführungsbeispiel der erfindungsgemäßen Antenne. Übereinstimmende Elemente sind mit den gleichen Bezugszeichen versehen, sodass sich eine wiederholende Beschreibung erübrigt. Fig. 6 zeigt eine perspektivische Darstellung, während Fig. 7 eine Seitenansicht und Fig. 8 eine Vorderansicht zeigen.The Fig. 6 to 8 show a third embodiment of the antenna according to the invention. Matching elements are denoted by the same reference numerals, so that a repetitive description is unnecessary. Fig. 6 shows a perspective view while Fig. 7 a side view and Fig. 8 show a front view.

Eine Besonderheit des dritten Ausführungsbeispiels besteht darin, dass das erste Antennenelement 3 aus mehreren flexiblen Metallbändern 50, 51 zusammengefügt sind, welche durch zwei Schraubverbindungen 52 und 53 zusammengehalten bzw. zusammengedrückt werden. Das Verbindungselement 4 besteht ebenso wie das Fußelement 54 aus einem becherförmigen Körper, in welches das zweite Antennenelement 5 als Wellrohr eingesetzt ist. Ferner ist der Anschluss 7 als koaxialer Steckverbinder mit schraubbarem Außenverbinder ausgeführt.A special feature of the third embodiment is that the first antenna element 3 of several flexible metal bands 50, 51 are joined together, which are held together or compressed by two screw 52 and 53. The connecting element 4, like the base element 54, consists of a cup-shaped body into which the second antenna element 5 is inserted as a corrugated tube. Further, the terminal 7 is designed as a coaxial connector with screwable outer connector.

Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt. Wie bereits erwähnt, können unterschiedliche Längen der Antennenelemente eingesetzt werden. Auch ist eine Kombination von mehr als zwei Antennenelementen mittels Spulen möglich. Alle vorstehend beschriebenen Merkmale oder in den Figuren gezeigten Merkmale sind im Rahmen der Erfindung beliebig vorteilhaft miteinander kombinierbar.The invention is not limited to the illustrated embodiment. As already mentioned, different lengths of the antenna elements can be used. Also, a combination of more than two antenna elements by means of coils is possible. All features described above or features shown in the figures can be combined with each other in any advantageous manner within the scope of the invention.

Claims (7)

  1. Antenna (1) with two antenna elements (3, 5, 20, 30, 32),
    wherein a first antenna element (3, 30) is connected with a second antenna element (5, 20, 32),
    wherein the first antenna element (3, 030) is connected with the second antenna element (5, 20, 32) by means of a coil,
    wherein the coil connects the first antenna element (3, 30) electrically with the second antenna element (5, 20, 32) for a low frequency range,
    wherein the coil isolates the first antenna element (3, 30) electrically from the second antenna element (5, 20, 32) for a high frequency range,
    wherein the first antenna element (3, 30) and the second antenna element (5,20, 32) together form a first part antenna,
    wherein the second antenna element (5, 20, 32) on its own forms a second part antenna,
    wherein the part antennas are in each case optimised for different frequency bands, and
    wherein the antenna (1) can only be connected with a radio device (2) at the second antenna element (5, 20, 32) at its end remote from the coil,
    characterised in that
    the first antenna element (3, 30) is composed at least in part of at least one flexible metal strip,
    wherein the first antenna element (3) is composed of a plurality of metal strips which are disposed in layers one on top of another and held together, and
    in that the second antenna element (5, 20, 32) is composed at least in part of a flexible corrugated tube.
  2. Antenna according to claim 1,
    characterised in that

    the second antenna element (5, 20, 32) carries the first antenna element (3, 30).
  3. Antenna according to one of claims 1 to 2, characterised in that
    the antenna elements (3, 5, 20, 30, 32) have a common longitudinal axis.
  4. Antenna according to one of claims 1 to 3,
    characterised in that
    the first part antenna is optimised for a frequency band from 30 MHz to 88 MHz and
    in that the second part antenna is optimised for a frequency band from 200 MHz to 450 MHz.
  5. Antenna according to one of claims 1 to 4,
    characterised in that
    the antenna (1) comprises a matching network (6, 44),
    in that the second antenna element (5, 20, 32) is connected with the matching network (6, 44), and
    in that the second antenna element (5, 20, 32) can be connected with the radio device (2) by means of the matching network (6, 44).
  6. Antenna according to claim 5,
    characterised in that
    the matching network (44) is disposed inside the corrugated tube.
  7. Antenna according to claim 5 or 6,
    characterised in that
    the tuning network (6, 44) matches the impedance of the antenna (1) to the impedance of the radio device (2), and in that the matching is carried out according to the frequency of the signals transmitted.
EP09776826.1A 2008-10-30 2009-06-24 Portable dual-band antenna Active EP2340585B1 (en)

Applications Claiming Priority (3)

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DE102008053833 2008-10-30
DE102009004024A DE102009004024A1 (en) 2008-10-30 2009-01-08 Portable dual band antenna
PCT/EP2009/004555 WO2010049017A1 (en) 2008-10-30 2009-06-24 Portable dual-band antenna

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EP2340585A1 EP2340585A1 (en) 2011-07-06
EP2340585B1 true EP2340585B1 (en) 2018-01-10

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EP (1) EP2340585B1 (en)
KR (1) KR101817585B1 (en)
CN (1) CN102197535B (en)
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CN102280711B (en) * 2011-05-05 2015-05-06 天津市万博线缆有限公司 Field wireless signal antenna

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US20110199271A1 (en) 2011-08-18
KR20110088508A (en) 2011-08-03
CN102197535B (en) 2014-07-02
CN102197535A (en) 2011-09-21
EP2340585A1 (en) 2011-07-06
WO2010049017A1 (en) 2010-05-06
DE102009004024A1 (en) 2010-05-06
US8791869B2 (en) 2014-07-29

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