EP2325941A1 - SMT-loadable antenna element - Google Patents
SMT-loadable antenna element Download PDFInfo
- Publication number
- EP2325941A1 EP2325941A1 EP09014591A EP09014591A EP2325941A1 EP 2325941 A1 EP2325941 A1 EP 2325941A1 EP 09014591 A EP09014591 A EP 09014591A EP 09014591 A EP09014591 A EP 09014591A EP 2325941 A1 EP2325941 A1 EP 2325941A1
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- EP
- European Patent Office
- Prior art keywords
- antenna element
- element according
- radiator
- carrier board
- antenna
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
Definitions
- the invention relates to an SMT-mountable (surface mount technology) antenna element for use in narrow-band ISM radio systems (Industrial, Scientific, Medical license-free usable frequency ranges), in particular its use in a heat meter.
- narrow-band ISM radio systems Industrial, Scientific, Medical license-free usable frequency ranges
- an antenna having a dielectric or permeable substrate and at least one resonant conductor track structure, which is intended in particular for use in the high-frequency and microwave range and is characterized in that the substrate has at least one cavity.
- the cavity is preferably introduced into an end face, so that it receives substantially the shape of a U-profile. This excavation not only increases the radiation efficiency but also significantly reduces the overall weight of the antenna.
- SMD surface mount
- PCB printed circuit board
- the DE 100 55 123 C2 describes an inverted-F antenna in which on a carrier layer, a metal layer is partially applied such that at least one antenna arm, an outer crossbar and an inner crossbar of the inverted-F antenna is formed by a metal-free part of the carrier layer, which is the metal layer into a ground plane and a pad, wherein the ground plane and the pad are deposited to form the contours of the metal-free part of the inverted-F antenna.
- the antenna described appears to be complementary to a conventional inverted-F antenna, since no metallic strip conductors form the F-shape, but slots which extend between a metal layer MASS and a metallic section MS.
- the EP 1 921 710 A2 describes an antenna with two resonance frequencies.
- the antenna structure is designed to operate as an inverted-F antenna at a first resonant frequency and as a folded monopole at a second resonant frequency.
- the antenna consists of a ground plane with a straight edge, a parallel thereto arranged first antenna element and a second and third antenna element.
- the second antenna element extends between the edge of the ground plane and the first antenna element.
- the one end of the second antenna element is in the vicinity of the connecting element and forms the base for feeding the signal, while the other end faces away from the base and is connected to the first antenna element.
- the third antenna element is arranged such that the first antenna element lies between the second and the third antenna element.
- the EP 1 764 866 A1 describes a monopole antenna for short-range radio.
- the electrically conductive structure is on a substrate arranged and formed by a first connected to the base of the antenna straight radiator element, a parallel to the first radiator element and associated with this second radiator element and a parallel to the first and second radiator element arranged third radiator element.
- the third radiating element is connected to the second radiating element and forms the open end of the monopole.
- the antenna is a resonant component which is to be adapted to the respective applications or the operating frequency range.
- wire antennas or coiled wire antennas are used to transmit the desired information or modulated RF signals.
- certain physical lengths are absolutely necessary.
- antennas In order to avoid the disadvantages of wire antennas, antennas have been developed in which one or more resonant metallic structures are deposited on a dimensionally stable dielectric substrate.
- antennas can be applied directly to an electronic board by surface mounting by soldering and contacting with traces and - if needed - together with other components or assemblies without additional retaining pins, screws, connectors, cables o. ⁇ are required for supplying the electromagnetic power or mechanical fixation.
- One object is to provide an improved antenna compared to the prior art, in particular one which is further improved in terms of its radiation properties and the automated placement.
- an antenna which has a low volume and weight and can be applied by surface mounting (SMT) on the circuit board. Robustness against shock, fall and vibration should be given.
- the antenna should be configured so that it can be used for signal transmission in a heat meter. The production should be possible with inexpensive standard processes.
- the object is achieved in that on a carrier plate formed from a dielectric substrate a Porterzugteil consisting of a arranged on the front of the carrier board vertical radiator portion and a leading radiator portion and arranged on the back of the carrier board returning radiator portion, is intended to form a compact design.
- the carrier board preferably has the shape of a rectangular parallelepiped.
- the leading radiator section which adjoins the end of the vertical radiator section, extends substantially horizontally thereto.
- the returning radiator portion and the leading radiator portion are arranged on different sides of the carrier board and preferably connected to each other at the distal ends of these radiator sections by means of a through-hole, resulting in a desired convolution.
- a ground terminal On the front of the antenna element, a ground terminal is provided, which forms the impedance matching to 50 ohms together with two coupled thin conductor tracks.
- ground surfaces are provided, which form the reference (reference ground) for the impedance matching and the coupled conductor tracks.
- solderable contacts are provided on one of the front sides, so that the support board is in the mounted state perpendicular to the motherboard.
- optional conical feet are arranged on one of the end faces, which the assembly in the automatic Lötmontage and the improve mechanical stability.
- this antenna element lies in its extremely compact design and easy integration. Its impedance matching to 50 ohms takes place via the special ladder train structure. The antenna element is operated standing on the motherboard to achieve omnidirectional radiation and good efficiency. The contacting and fixing takes place via solder connections (milled half-vias).
- the antenna element comprises a parallelepiped dielectric substrate of 10 x 28 mm in thickness of 3.2 mm, on the surfaces of which front and back surfaces are a resonant conductor pattern.
- Theêtkar réelle is formed by one or more metallizations, preferably two copper layers, and applied to the carrier board.
- the Edinburghkarteil consists on the front of the carrier board ( FIG. 1 ) from the leading radiator section 8 and the vertical radiator section 10, via the coupled lines 6 on the one hand via the ground terminal 7 with the front reference ground surface 11 and on the other hand via the coupled lines 6 with the feed point 1, as a milled through hole (half-Via) the lower end face is formed, are connected.
- ground connection points 2 and 3 and a potential-free soldering point 4 are arranged on the lower end face. These serve on the one hand for fixing the antenna element on the motherboard d. H. as soldering points, with which the antenna element is surface soldered by surface mounting (SMT) on the motherboard and on the other hand for galvanic contacting of the reference ground. These are also formed as a milled through-hole (half-via).
- SMT surface mounting
- the potential-free soldering point 4 is used for further mechanical fixation and can be grounded.
- the returning radiator section 9 and the rear reference ground surface 11 is provided on the back of the carrier board ( FIG. 2 ).
- the leading radiator section 8 and the returning radiator section 9 are interconnected by a via (via) 5.
- the cutout 12 in the carrier board of the antenna element is not necessary for the operation of the antenna.
- the cutout 12 serves to create a place for a detent in the housing of a heat meter.
- the mounting of the antenna element is such that the carrier board is perpendicular to the motherboard.
- the antenna element according to the invention is preferably used in a heat meter which is attached to heating systems. This makes it possible to detect the heat consumption over a radio link.
- the antenna is powered at feed point 1 via a 50 ohm line (eg, microstrip line) by an RF generator (transmitter).
- a 50 ohm line eg, microstrip line
- signals received by the antenna can also be delivered to a 50 ohm line to the receiver.
- the power adjustment of the antenna base to the line impedance (50 ohms) is generated by the coupled lines 6 in conjunction with the electrical length of the entire monopole radiating element 5, 8, 9, 10.
- the frequency range in which the impedance matching prevails be moved. This makes it possible to optimize this antenna shape for different operating frequencies and installation conditions.
- the antenna can be significantly shortened in contrast to non-printed monopole antennas.
- a high dielectric constant Epsilon R of the substrate leads to a significant increase in the electrical length of the radiator element with the same mechanical length.
- the antenna is characterized by a high degree of efficiency, which can be influenced by the choice of the substrate material and the surface refinement of the conductor tracks, as well as by the height and design of the motherboard.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
Die Erfindung betrifft ein SMT-bestückbares (surface mount technology) Antennenelement für den Einsatz in schmalbandigen ISM-Funksystemen (Industrial, Scientific, Medical - lizenzfrei nutzbare Frequenzbereiche), insbesondere seine Verwendung in einem Wärmemengenzähler.The invention relates to an SMT-mountable (surface mount technology) antenna element for use in narrow-band ISM radio systems (Industrial, Scientific, Medical license-free usable frequency ranges), in particular its use in a heat meter.
Bekannt ist aus der
Die
Die
Die
Der heutige Trend geht nach immer kleinerwerdenden elektronischen Bauteilen bzw. Baugruppen. Speziell für den Einsatz von elektronischen Baugruppen bzw. Bauteilen im Bereich der Hochfrequenz- und Mikrowellentechnik entstehen besondere Probleme, da eine Vielzahl von Eigenschaften von den physikalischen Abmessungen abhängig sind. Mit zunehmender Frequenz werden die Wellenlängen kürzer, was zu einer stärkeren Beeinflussung der speisenden Signalquelle führen kann.Today's trend is towards ever-smaller electronic components or assemblies. Especially for the use of electronic assemblies or components in the field of high-frequency and microwave technology, special problems arise because a variety of properties of the physical dimensions are dependent. With increasing frequency, the wavelengths become shorter, which can lead to a stronger influence on the feeding signal source.
Dies trifft insbesondere für die Struktur der Antenne in einem elektronischen Gerät zu. Die Antenne ist ein resonantes Bauteil, das an die jeweiligen Anwendungen oder den Betriebs-Frequenzbereich anzupassen ist.This is especially true for the structure of the antenna in an electronic device. The antenna is a resonant component which is to be adapted to the respective applications or the operating frequency range.
Im Allgemeinen werden zur Übertragung der gewünschten Information bzw. der modulierten HF-Signale Drahtantennen oder gewendelte Drahtantennen verwendet. Um gute Abstrahl- und Empfangseigenschaften zu erzielen, sind bestimmte physikalische Längen zwingend erforderlich.In general, wire antennas or coiled wire antennas are used to transmit the desired information or modulated RF signals. In order to achieve good radiation and reception properties, certain physical lengths are absolutely necessary.
Um die Nachteile der Drahtantennen zu vermeiden, wurden Antennen entwickelt, bei denen eine oder mehrere resonanten metallische Strukturen auf einem formstabilen dielektrischen Substrat aufgebracht sind.In order to avoid the disadvantages of wire antennas, antennas have been developed in which one or more resonant metallic structures are deposited on a dimensionally stable dielectric substrate.
Da die Wellenlängen im Dielektrikum im Vergleich zum Vakuum wesentlich kleiner ist, lassen sich Antennen mit wesentlich geringeren Abmessungen herstellen.Since the wavelengths in the dielectric are much smaller compared to the vacuum, it is possible to produce antennas with much smaller dimensions.
Ein weiterer Vorteil dieser Antennen besteht darin, dass sie durch Oberflächenmontage durch Auflöten und Kontaktieren mit Leiterbahnen und - falls benötigt - zusammen mit anderen Bauteilen oder Baugruppen direkt auf eine Elektronikplatine aufgebracht werden können, ohne dass zusätzliche Haltestifte, Schrauben, Steckverbinder, Kabel o. ä. zum Zuführen der elektromagnetischen Leistung bzw. zur mechanischen Fixierung erforderlich sind.Another advantage of these antennas is that they can be applied directly to an electronic board by surface mounting by soldering and contacting with traces and - if needed - together with other components or assemblies without additional retaining pins, screws, connectors, cables o. Ä are required for supplying the electromagnetic power or mechanical fixation.
Eine Aufgabe besteht darin, eine gegenüber dem Stand der Technik verbesserte Antenne anzugeben, insbesondere eine, welche im Hinblick auf ihre Abstrahlungseigenschaften sowie die automatisierte Bestückbarkeit weiter verbessert ist.One object is to provide an improved antenna compared to the prior art, in particular one which is further improved in terms of its radiation properties and the automated placement.
Außerdem soll eine Antenne geschaffen werden, die ein geringes Volumen und Gewicht aufweist und durch Oberflächenmontage (SMT) auf die Schaltungsplatine aufgebracht werden kann. Robustheit gegenüber Schock, Fall und Vibration soll gegeben sein. Dabei soll die Antenne so konfiguriert sein, dass sie zur Signalübertragung in einem Wärmemengenzähler einsetzbar ist. Die Herstellung soll mit kostengünstigen Standardprozessen möglich sein.In addition, an antenna is to be created, which has a low volume and weight and can be applied by surface mounting (SMT) on the circuit board. Robustness against shock, fall and vibration should be given. The antenna should be configured so that it can be used for signal transmission in a heat meter. The production should be possible with inexpensive standard processes.
Gelöst wird die Aufgabe dadurch, dass auf einer aus einem dielektrischen Substrat gebildeten Trägerplatine eine Leiterzugstruktur, bestehend aus einem auf der Vorderseite der Trägerplatine angeordneten vertikalen Strahlerabschnitt sowie einem vorlaufenden Strahlerabschnitt und auf der Rückseite der Trägerplatine angeordneten rücklaufenden Strahlerabschnitt, zur Bildung einer kompakten Bauform vorgesehen ist. Die Trägerplatine weist dabei vorzugsweise die Form eines rechteckigen Quaders auf. Der vorlaufende Strahlerabschnitt, der sich an das Ende des vertikalen Strahlerabschnittes anschließt, verläuft im wesentlichen dazu horizontal. Der rücklaufende Strahlerabschnitt und der vorlaufende Strahlerabschnitt sind auf verschiedenen Seiten der Trägerplatine angeordnet und vorzugsweise an den entfernten Enden dieser Strahlerabschnitte mittels einer Durchkontaktierung miteinander verbunden, wodurch sich eine gewünschte Faltung ergibt.The object is achieved in that on a carrier plate formed from a dielectric substrate a Leiterzugstruktur consisting of a arranged on the front of the carrier board vertical radiator portion and a leading radiator portion and arranged on the back of the carrier board returning radiator portion, is intended to form a compact design. The carrier board preferably has the shape of a rectangular parallelepiped. The leading radiator section, which adjoins the end of the vertical radiator section, extends substantially horizontally thereto. The returning radiator portion and the leading radiator portion are arranged on different sides of the carrier board and preferably connected to each other at the distal ends of these radiator sections by means of a through-hole, resulting in a desired convolution.
Auf der Vorderseite des Antennenelements ist ein Masseanschluss vorgesehen, der zusammen mit zwei gekoppelten dünnen Leiterzügen die Impedanzanpassung an 50 Ohm bildet. Jeweils auf der Vorder- und Rückseite des Antennenelements sind Masseflächen vorgesehen, welche die Referenz (Bezugsmasse) für die Impedanzanpassung und die gekoppelten Leiterzüge bilden. Zur Befestigung und Kontaktierung des Antennenelements an bzw. mit der Grundplatine sind an einer der Stirnseiten lötbare Kontaktierungen vorgesehen, so dass die Trägerplatine im montierten Zustand senkrecht auf der Grundplatine steht.On the front of the antenna element, a ground terminal is provided, which forms the impedance matching to 50 ohms together with two coupled thin conductor tracks. In each case on the front and back of the antenna element ground surfaces are provided, which form the reference (reference ground) for the impedance matching and the coupled conductor tracks. For attachment and contacting of the antenna element to or with the motherboard solderable contacts are provided on one of the front sides, so that the support board is in the mounted state perpendicular to the motherboard.
Durch den auf der Vorderseite angeordneten vorlaufenden Strahlerabschnitt und den auf der Rückseite angeordneten rücklaufenden Strahlerabschnitt, die mit maximal einer Durchkontaktierung (Via) verbunden sind, besteht die Möglichkeit, durch Dickentoleranzen des dielektrischen Substrates verursachte Längentoleranzen gering zu halten.By arranged on the front leading emitter section and arranged on the back of expecting radiator portion which are connected to a maximum of a via (via), it is possible to keep caused by thickness tolerances of the dielectric substrate length tolerances low.
Zur Fixierung in entsprechenden Löchern in der Grundplatine und zur Verbesserung der Positioniergenauigkeit sind an einer der Stirnseiten zusätzlich eventuell galvanisch metallisierte, optional konische Füße angeordnet, welche die Bestückung in der automatischen Lötmontage und die mechanische Stabilität verbessern. Die Ausführung als dicker Quader, dessen Verhältnis Höhe zu Dicke (Breite) ein gewisses Maß nicht überschreitet, erlaubt es, dass das Antennenelement bei der automatisierten Bestückung auf der Grundplatine auch bei unvermeidlichen Vibrationen beim Transport in der Fertigungslinie bis zur entgültigen Verlötung stehenbleibt. Durch Verwendung eines dünneren und höheren Antennenelementes wäre dieses "stabile" Verhältnis überschritten, so dass die Vorteile verlorengingen.For fixation in corresponding holes in the motherboard and to improve the positioning accuracy possibly galvanically metallized, optional conical feet are arranged on one of the end faces, which the assembly in the automatic Lötmontage and the improve mechanical stability. The design as a thick cuboid, the ratio of height to thickness (width) does not exceed a certain extent, allows the antenna element in the automated assembly on the motherboard even with unavoidable vibrations during transport in the production line stops until final soldering. By using a thinner and higher antenna element this "stable" ratio would be exceeded, so that the benefits were lost.
Der Hauptvorteil dieses Antennenelements liegt jedoch in seiner extrem kompakten Bauform und leichten Integrierbarkeit. Seine Impedanz-Anpassung an 50 Ohm erfolgt über die spezielle Leiterzugstruktur. Das Antennenelement wird auf der Grundplatine stehend betrieben, um eine omnidirektionale Abstrahlung und einen guten Wirkungsgrad zu erreichen. Die Kontaktierung und Fixierung erfolgt über Lötanschlüsse (angefräste Halb-Vias).However, the main advantage of this antenna element lies in its extremely compact design and easy integration. Its impedance matching to 50 ohms takes place via the special ladder train structure. The antenna element is operated standing on the motherboard to achieve omnidirectional radiation and good efficiency. The contacting and fixing takes place via solder connections (milled half-vias).
Nachstehend soll die Erfindung anhand eines Ausführungsbeispieles näher erläutert werden. Es zeigen
- Figur 1:
- Vorderseite des Antennenelements
- Figur 2:
- Rückseite des Antennenelements
- FIG. 1:
- Front of the antenna element
- FIG. 2:
- Rear of the antenna element
Das Antennenelement umfaßt eine quaderförmige aus einem dielektrischen Substrat bestehende Trägerplatine mit den Abmessungen 10 x 28 mm bei einer Dicke von 3,2 mm, auf dessen Oberflächen der Vorder- und Rückseite sich eine resonante Leiterzugstruktur befindet. Die Leiterzugstruktur ist durch eine oder mehrere Metallisierungen, vorzugsweise zwei Kupferlagen, gebildet und auf die Trägerplatine aufgebracht.The antenna element comprises a parallelepiped dielectric substrate of 10 x 28 mm in thickness of 3.2 mm, on the surfaces of which front and back surfaces are a resonant conductor pattern. The Leiterzugstruktur is formed by one or more metallizations, preferably two copper layers, and applied to the carrier board.
Die Leiterzugstruktur besteht auf der Vorderseite der Trägerplatine (
Weiterhin sind an der unteren Stirnseite die Masseanschlusspunkte 2 und 3 sowie ein potentialfreier Lötpunkt 4 angeordnet. Diese dienen zum einen zur Fixierung des Antennenelements auf der Grundplatine d. h. als Lötpunkte, mit denen das Antennenelement durch Oberflächenmontage (SMT) auf die Grundplatine aufgelötet wird und zum anderen zur galvanischen Kontaktierung der Bezugsmasse. Ausgebildet sind diese auch als angefräste Durchkontaktierung (Halb-Via). Der potentialfreie Lötpunkt 4 dient der weiteren mechanischen Fixierung und kann auf Masse gelegt werden.Furthermore, the
Auf der Rückseite der Trägerplatine (
Die Ausfräsung 12 in der Trägerplatine des Antennenelements ist für die Funktionsweise der Antenne nicht notwendig. Die Ausfräsung 12 dient zur Schaffung eines Platzes für eine Rastnase im Gehäuse eines Wärmemengenzählers.The
Die Montage des Antennenelements erfolgt derart, dass die Trägerplatine senkrecht zur Grundplatine steht.The mounting of the antenna element is such that the carrier board is perpendicular to the motherboard.
Das erfindungsgemäße Antennenelement kommt vorzugsweise in einem Wärmemengenzähler, der an Heizungsanlagen angebracht ist, zum Einsatz. Dadurch ist es möglich, den Wärmemengenverbrauch über eine Funkstrecke zu erfassen.The antenna element according to the invention is preferably used in a heat meter which is attached to heating systems. This makes it possible to detect the heat consumption over a radio link.
Die Antenne wird am Speisepunkt 1 über eine 50-Ohm-Leitung (z. B. Mikrostreifenleitung) durch einen HF-Generator (Sender) gespeist.The antenna is powered at feed point 1 via a 50 ohm line (eg, microstrip line) by an RF generator (transmitter).
Umgekehrt können auch von der Antenne empfangene Signale an eine 50-Ohm-Leitung zum Empfänger hin abgegeben werden. Die Leistungsanpassung des Antennenfußpunktes an den Leitungswellenwiderstand (50 Ohm) wird durch die gekoppelten Leitungen 6 im Zusammenspiel mit der elektrischen Länge des gesamten Monopol-Strahlerelementes 5, 8, 9, 10 erzeugt. Durch Variation der gesamten Strahlerlänge und der Einzellängen der gekoppelten Leitungen 6 sowie der Lage des Masseanschlusses 7 kann der Frequenzbereich, in welchem die Impedanzanpassung vorherrscht, verschoben werden. Damit ist es möglich, diese Antennenform für verschiedene Arbeitsfrequenzen und Einbaubedingungen zu optimieren.Conversely, signals received by the antenna can also be delivered to a 50 ohm line to the receiver. The power adjustment of the antenna base to the line impedance (50 ohms) is generated by the coupled
Die Aufteilung des Strahlerelementes in einen vorlaufenden Strahlerabschnitt 8 und einen rücklaufenden Strahlerabschnitt 9 im Gegensatz zu einer gestreckten Ausführung bringt eine deutliche Reduzierung des benötigten Bauraumes mit sich, was für heutige Anwendungen mit in die Elektronik integrierten Antennen sehr nützlich ist.The division of the radiator element in a leading
Durch geeignete Wahl der elektrischen Eigenschaften des verwendeten Substrats kann die Antenne im Gegensatz zu nicht-gedruckten Monopolantennen deutlich verkürzt werden.By suitable choice of the electrical properties of the substrate used, the antenna can be significantly shortened in contrast to non-printed monopole antennas.
Eine hohe Dielektrizitätskonstante Epsilon R des Substrates führt zu einer deutlichen Vergrößerung der elektrischen Länge des Strahlerelementes bei gleichbleibender mechanischer Länge.A high dielectric constant Epsilon R of the substrate leads to a significant increase in the electrical length of the radiator element with the same mechanical length.
Die Antenne zeichnet sich durch einen hohen Wirkungsgrad aus, welcher durch Wahl des Substratmaterials und der Oberflächenveredelung der Leiterzüge, sowie durch die Bauhöhe und Ausführung der Grundplatine beeinfilußt werden kann.The antenna is characterized by a high degree of efficiency, which can be influenced by the choice of the substrate material and the surface refinement of the conductor tracks, as well as by the height and design of the motherboard.
- 1 -1 -
- Speisepunktfeedpoint
- 2 -2 -
- MasseanschlusspunktGround terminal
- 3 -3 -
- MasseanschlusspunktGround terminal
- 4 -4 -
- potentialfreier LötpunktPotential-free soldering point
- 5 -5 -
- Durchkontaktierungvia
- 6 -6 -
- gekoppelte Leitungencoupled lines
- 7 -7 -
- Masseanschlussground connection
- 8 -8th -
- vorlaufender Strahlerabschnittleading radiator section
- 9 -9 -
- rücklaufender Strahlerabschnittreturning radiator section
- 10 -10 -
- senkrechter Strahlerabschnittvertical radiator section
- 11 -11 -
- BezugsmasseflächeReference ground surface
- 12 -12 -
- Ausfräsungcountersink
Claims (10)
auf einer aus einem dielektrischen Substrat gebildeten Trägerplatine eine Leiterzugstruktur, bestehend aus einem auf der Vorderseite der Trägerplatine angeordneten vertikalen Strahlerabschnitt (10) sowie einem vorlaufenden Strahlerabschnitt (8) und auf der Rückseite der Trägerplatine angeordneten rücklaufenden Strahlerabschnitt (9), zur Bildung einer kompakten Bauform vorgesehen ist.SMT-mountable antenna element with a dielectric substrate and at least one resonant conductor track for high-frequency radio systems, in particular for use in ISM frequency bands, characterized in that
on a carrier plate formed from a dielectric substrate a Leiterzugstruktur consisting of a arranged on the front side of the carrier board vertical radiator portion (10) and a leading radiator portion (8) and arranged on the back of the carrier board returning radiator portion (9), to form a compact design is provided.
dadurch gekennzeichnet, dass
die Trägerplatine die Form eines rechteckigen Quaders aufweist.Antenna element according to claim 1,
characterized in that
the carrier board has the shape of a rectangular parallelepiped.
dadurch gekennzeichnet, d a s s
der vorlaufende Strahlerabschnitt (8), der sich an das Ende des vertikalen Strahlerabschnittes (10) anschließt, im wesentlichen horizontal zum Strahlerabschnitt (10) verläuft.Antenna element according to claim 1 and 2,
characterized in that
the leading radiator section (8), which adjoins the end of the vertical radiator section (10), extends substantially horizontally to the radiator section (10).
dadurch gekennzeichnet, d a s s
der rücklaufende Strahlerabschnitt (9) und der vorlaufende Strahlerabschnitt (8), die auf verschiedenen Seiten der Trägerplatine angeordnet sind, mittels einer Durchkontaktierung (5) miteinander verbunden sind.Antenna element according to claim 1 to 3,
characterized in that
the returning radiator section (9) and the leading radiator section (8), which are arranged on different sides of the carrier board, are interconnected by means of a plated-through hole (5).
dadurch gekennzeichnet, d a s s
auf der Vorderseite des Antennenelements ein Masseanschluss (7) vorgesehen ist, der mit den gekoppelten Leiterzügen (6) die Impedanzanpassung bildet.Antenna element according to claim 1 to 4,
characterized in that
on the front of the antenna element, a ground terminal (7) is provided which forms the impedance matching with the coupled conductor tracks (6).
dadurch gekennzeichnet, d a s s
auf der Vorder- und Rückseite jeweils eine Massefläche (11) vorgesehen ist, die die Referenz für die Impedanzanpassung und die gekoppelten Leitungen (6, 7) bildet.Antenna element according to claim 1 to 5,
characterized in that
on the front and rear side in each case a ground surface (11) is provided which forms the reference for the impedance matching and the coupled lines (6, 7).
dadurch gekennzeichnet, dass
an mindestens einer Stirnseite lötbare Kontaktierungen (1, 2, 3, 4) angeordnet sind.Antenna element according to claim 1 to 6,
characterized in that
solderable contacts (1, 2, 3, 4) are arranged on at least one end face.
dadurch gekennzeichnet, d a s s
die Dicke des Substrats der Trägerplatine zwischen 0,5 und 4 mm beträgt.Antenna element according to claim 1 to 7,
characterized in that
the thickness of the substrate of the carrier board is between 0.5 and 4 mm.
dadurch gekennzeichnet, dass
es eine Ausfräsung (12) zur Anpassung an ein Gehäuse aufweist.Antenna element according to claim 1 to 8,
characterized in that
it has a cutout (12) for adaptation to a housing.
dadurch gekennzeichnet, dass die Trägerplatine im montierten Zustand senkrecht auf der Grundplatine steht.Antenna element according to claim 1 to 9,
characterized in that the carrier board is in the mounted state perpendicular to the motherboard.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09014591A EP2325941A1 (en) | 2009-11-24 | 2009-11-24 | SMT-loadable antenna element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09014591A EP2325941A1 (en) | 2009-11-24 | 2009-11-24 | SMT-loadable antenna element |
Publications (1)
Publication Number | Publication Date |
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EP2325941A1 true EP2325941A1 (en) | 2011-05-25 |
Family
ID=41508349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09014591A Withdrawn EP2325941A1 (en) | 2009-11-24 | 2009-11-24 | SMT-loadable antenna element |
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EP (1) | EP2325941A1 (en) |
Citations (11)
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JPH05259724A (en) * | 1992-03-13 | 1993-10-08 | Matsushita Electric Works Ltd | Print antenna |
US6147652A (en) * | 1997-09-19 | 2000-11-14 | Kabushiki Kaisha Toshiba | Antenna apparatus |
US6239765B1 (en) * | 1999-02-27 | 2001-05-29 | Rangestar Wireless, Inc. | Asymmetric dipole antenna assembly |
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DE10055123C2 (en) | 2000-11-07 | 2003-06-05 | Siemens Ag | Inverted-F antenna |
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GB2404497A (en) * | 2003-07-30 | 2005-02-02 | Peter Bryan Webster | PCB mounted antenna |
EP1764866A1 (en) | 2005-09-15 | 2007-03-21 | Infineon Tehnologies AG | Miniaturized integrated monopole antenna |
EP1921710A2 (en) | 2006-11-09 | 2008-05-14 | Tyco Electronics AMP K.K. | Antenna |
US20080169981A1 (en) * | 2007-01-16 | 2008-07-17 | Kabushiki Kaisha Toshiba | Antenna device operable in multiple frequency bands |
-
2009
- 2009-11-24 EP EP09014591A patent/EP2325941A1/en not_active Withdrawn
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JPH05259724A (en) * | 1992-03-13 | 1993-10-08 | Matsushita Electric Works Ltd | Print antenna |
US6147652A (en) * | 1997-09-19 | 2000-11-14 | Kabushiki Kaisha Toshiba | Antenna apparatus |
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EP1189304A2 (en) * | 2000-09-19 | 2002-03-20 | Sony Corporation | Antenna device and radio communication card module having antenna device |
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WO2004109850A1 (en) * | 2003-06-04 | 2004-12-16 | Murata Manufacturing Co. Ltd. | Frequency-variable antenna and communication device having the same |
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EP1764866A1 (en) | 2005-09-15 | 2007-03-21 | Infineon Tehnologies AG | Miniaturized integrated monopole antenna |
EP1921710A2 (en) | 2006-11-09 | 2008-05-14 | Tyco Electronics AMP K.K. | Antenna |
US20080169981A1 (en) * | 2007-01-16 | 2008-07-17 | Kabushiki Kaisha Toshiba | Antenna device operable in multiple frequency bands |
Non-Patent Citations (1)
Title |
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CHIU CHING-YUAN ET AL: "Shorted, folded planar monopole antenna for dual-band mobile phone", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 39, no. 18, 4 September 2003 (2003-09-04), pages 1301 - 1302, XP006020943, ISSN: 0013-5194 * |
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