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WO2008014762A1 - Inverted f-antenna - Google Patents

Inverted f-antenna Download PDF

Info

Publication number
WO2008014762A1
WO2008014762A1 PCT/DE2007/001334 DE2007001334W WO2008014762A1 WO 2008014762 A1 WO2008014762 A1 WO 2008014762A1 DE 2007001334 W DE2007001334 W DE 2007001334W WO 2008014762 A1 WO2008014762 A1 WO 2008014762A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
signal
main radiator
strip
antennas
Prior art date
Application number
PCT/DE2007/001334
Other languages
German (de)
French (fr)
Inventor
Hans-Jörg REINHEIMER
Jakob Heierli
Original Assignee
Reel Reinheimer Elektronik Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reel Reinheimer Elektronik Gmbh filed Critical Reel Reinheimer Elektronik Gmbh
Publication of WO2008014762A1 publication Critical patent/WO2008014762A1/en

Links

Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • 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 inverted F antenna (IFA) with a strip-shaped main radiator and perpendicularly oriented strip-shaped signal and ground connections, wherein the ground connection associated with one end of the main radiator and the signal connection is arranged adjacent thereto, wherein the antenna as a one-piece element of a made flat metal sheet strips and the surface of the main radiator is aligned perpendicular to the ground reference surface.
  • IFA inverted F antenna
  • the IFA is known as a short-circuit reversed L antenna with an open rod-shaped main radiator.
  • the main radiator is aligned parallel to the ground reference surface. About the L-leg, the signal is passed through the ground reference surface insulated.
  • the main radiator is extended beyond the outgoing L-leg and connected via another leg in short circuit to the ground reference surface. The entire arrangement resembles a reverse F.
  • the total length L of the main radiator is on tuned the transmission / reception frequency.
  • the distance H of the main radiator to the ground reference surface and the length L determine the input impedance of the antenna. About the distance S between the two F-legs, the impedance can be adjusted.
  • the sizing of IFA can be done with the help of known
  • Calculation programs are determined. For the range of common communication frequencies from 824 to 894 MHz and the civil GPS frequency of 1575 MHz. Are very compact dimensions. A disadvantage of the rod-shaped IFA is its low bandwidth.
  • An increase in the bandwidth and the radiation efficiency is achieved by a planar design of the main radiator parallel to the ground reference surface.
  • the short circuit to the ground reference surface is made via a strip-shaped connection.
  • the signal line is connected to the planar area at a suitable location.
  • the size and shape of the antenna plate, its distance to the ground reference surface, the shape and arrangement of the ground connection and the position of the signal connection point have a significant influence on the electrical properties of the planar IFA. Their dimensioning and construction is therefore much more complex than with the rod-shaped IFA.
  • an IFA which consists of strip-shaped tracks on an epoxy resin substrate.
  • the ladders lie on the edge of a board next to the ground reference surface.
  • the base of the antenna with the electronic elements for signal processing is therefore larger. Subsequent tuning of the geometric parameters is not possible.
  • the invention therefore an object of the invention to provide an easy to manufacture, subsequently tunable IFA with omnidirectional constant transmission / reception power, which can be connected to save space and without costly adjustment to the ground reference surface and the signal line on a circuit board.
  • the arrangement of the IFA on the board should allow an adaptation of the spatial shape of certain housing shapes and ensure a largely constant reception performance especially for hand-held devices, regardless of their orientation.
  • an antenna of the type mentioned in the present invention that two mutually angled antennas are provided, the signal connections are close to each other in relation to the resonance wavelength of the antenna and are connected to a signal combiner.
  • the bases of the signal and ground connections are expediently provided with nose-shaped projections for insertion into pads of a circuit board.
  • the angle is preferably 90 °.
  • the surface of the main radiator can also be bent in the longitudinal direction.
  • the manufacture of the antenna element as a one-piece element allows a closed geometric design using known simulation computer programs.
  • the geometric data can be transferred directly to a CAD-controlled production plant.
  • a flat metal sheet strip can be cut out in the desired shape either with the aid of a laser cutting machine or the mold can be produced in an etching system.
  • Mass production also punching possible.
  • the choice of metal can be adapted to the different production methods.
  • the finished antenna element has a stiffness for handling for installation and operation. Since the operating parameters of Depending on the geometric dimensions of the antenna element, these can be subsequently reworked eg by grinding, milling, filing or the like.
  • the nose-shaped projections at the foot points can be used for mounting in designated solder pads in a circuit board. For that both can
  • Assembly robots are used as well as untrained auxiliary staff.
  • the one-piece shape of the antenna element with the insertion lugs is adapted to the intended operation of the antenna with alignment of its surface perpendicular to the ground reference surface.
  • This solution is in contrast to the known experience, according to which the surface of the main radiator is to be aligned parallel to the ground reference surface when an increase in performance is to be achieved.
  • the thickness of the antenna strip acts like a conventional rod-shaped IFA.
  • the zenith-oriented effective thickness increases, so that the antenna according to the invention operates like an IFA with a continuously variable rod diameter.
  • the width of the antenna strip is determinant of the received power. Since in this case the effective rod diameter of an equivalent rod-shaped IFA decreases with increasing inclination of the device, this results in a preferred application of the antenna arrangement according to the invention for GPS reception.
  • the receiving power decreases with a rotation about the axis perpendicular to the horizontal alignment with increasing departure from the location of the transmitter.
  • two identical antennas can be placed at an angle to each other on the board, if it is ensured that their signal connections are close to each other in relation to the resonance wavelength of the antennas. Since the distance between the ground short-circuit and the signal feed in an IFA is usually much smaller than the length of the main radiator, the aforementioned condition is easily met if the free ends of the main radiator form the legs of the angle between the two antennas.
  • the two antennas behave as a single antenna when their signal connections are connected via a signal combiner.
  • the resulting reduction in the reception power of one antenna is complemented by a corresponding increase in the reception power of the other antenna.
  • the interference of the signals due to phase shifts usually occurring in the interconnection of antennas can not be observed.
  • the all-round effect of the new antennas can be further improved by bending the surfaces of the main radiator in the longitudinal direction. This additionally enables an adaptation of the antenna arrangement to cylindrical housing covers, as used for example in receivers for mounting on vehicles.
  • FIG. 2 shows an arrangement of two mutually angled antennas on a circuit board.
  • FIG. 1 shows a view of an integrally made of a flat sheet metal strip IFA with main radiator 1, signal connection 2 and ground connection 3. At the foot of the signal connection 2 and the ground connection 3 nose-shaped projections 4, 4 'are provided.
  • the usual geometric parameters L, H and S are given.
  • the height H is based on a mass reference surface 5.
  • the length L corresponds to a quarter of the resonance wavelength of the antenna.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

An 'inverted F-antenna' (IFA) is described, with a main antenna element (1, 1') in the form of a strip or strips and with signal connections (2, 2') and earth connections (3, 3') which are in the form of a strip or strips and are aligned at right angles to said main antenna element (1, 1'), in which the earth connection (3, 3') is associated with one end of the main antenna element (1, 1'), and the signal connection (2, 2') is arranged adjacent thereto, with the antenna being manufactured as an integral element from a flat sheet-metal strip, and with the surface of the main antenna element (1, 1') being aligned at right angles to the earth reference plane (5), and it is distinguished in that two antennas are provided, which are at an angle to one another and whose signal connections (2, 2') are close to one another in comparison to the resonant wavelength of the antennas and are connected to a signal bound (7).

Description

Inverted F-Antenne Inverted F antenna
Die Erfindung betrifft eine Inverted F-Antenne (IFA) mit einem streifenförmigen Hauptstrahler und dazu senkrecht ausgerichteten streifenförmigen Signal- und Masseverbindungen, bei der die Masseverbindung einem Ende des Hauptstrahlers zugeordnet und die Signalverbindung dazu benachbart angeordnet ist, wobei die Antenne als einteiliges Element aus einem flachen Metallblech-Streifen gefertigt und die Fläche des Hauptstrahlers senkrecht zur Massebezugsfläche ausgerichtet ist. Ein solches Antennenelement ist aus GB 2 404 497 A bekannt.The invention relates to an inverted F antenna (IFA) with a strip-shaped main radiator and perpendicularly oriented strip-shaped signal and ground connections, wherein the ground connection associated with one end of the main radiator and the signal connection is arranged adjacent thereto, wherein the antenna as a one-piece element of a made flat metal sheet strips and the surface of the main radiator is aligned perpendicular to the ground reference surface. Such an antenna element is known from GB 2 404 497 A.
Für den Betrieb tragbarer Telefon- und Navigationsgeräte werden besonders kleine und kompakte Antennen benötigt, die in ihrer Empfangs- und Sendeempfindlichkeit möglichst unbeeinflußt von Änderungen in der Ausrichtung der Geräte sind und auf die benötigten Frequenzen gut abstimmbar sind.For the operation of portable telephone and navigation devices particularly small and compact antennas are required, which are as unaffected by changes in the orientation of the devices in their reception and transmission sensitivity and are well tuned to the required frequencies.
Die IFA ist bekannt als eine im Kurzschluß betriebene umgekehrte L- Antenne mit offenem stabförmigem Hauptstrahler. Der Hauptstrahler wird parallel zur Massebezugsfläche ausgerichtet. Über den L-Schenkel wird das Signal durch die Massebezugsfläche isoliert hindurchgeführt. Der Hauptstrahler wird über den abgehenden L-Schenkel hinaus verlängert und über einen weiteren Schenkel im Kurzschluß mit der Massebezugsfläche verbunden. Die gesamte Anordung gleicht damit einem umgekehrten F. Die Gesamtlänge L des Hauptstrahlers ist auf die Sende-/Empfangsfrequenz abgestimmt. Der Abstand H des Hauptstrahlers zur Massebezugsfläche und die Länge L bestimmen die Eingangsimpedanz der Antenne. Über den Abstand S zwischen den beiden F-Schenkeln kann die Impedanz abgestimmt werden. Die Dimensionierung der IFA kann mit Hilfe bekannterThe IFA is known as a short-circuit reversed L antenna with an open rod-shaped main radiator. The main radiator is aligned parallel to the ground reference surface. About the L-leg, the signal is passed through the ground reference surface insulated. The main radiator is extended beyond the outgoing L-leg and connected via another leg in short circuit to the ground reference surface. The entire arrangement resembles a reverse F. The total length L of the main radiator is on tuned the transmission / reception frequency. The distance H of the main radiator to the ground reference surface and the length L determine the input impedance of the antenna. About the distance S between the two F-legs, the impedance can be adjusted. The sizing of IFA can be done with the help of known
Rechenprogramme ermittelt werden. Für den Anwendungsbereich der üblichen Kommunikationsfrequenzen von 824 bis 894 MHz und der zivilen GPS-Frequenz von 1575 MHz. Ergeben sich sehr kompakte Abmessungen. Ein Nachteil der stabförmigen IFA ist ihre geringe Bandbreite.Calculation programs are determined. For the range of common communication frequencies from 824 to 894 MHz and the civil GPS frequency of 1575 MHz. Are very compact dimensions. A disadvantage of the rod-shaped IFA is its low bandwidth.
Eine Steigerung der Bandbreite und der Strahlungseffektivität wird durch eine planare Ausbildung des Hauptstrahlers parallel zur Massebezugsfläche erreicht. Der Kurzschluß zur Massebezugsfläche wird über eine streifenförmige Verbindung hergestellt. Die Signalleitung wird an einer geeigneten Stelle mit der planaren Fläche verbunden. Die Größe und die Form der Antennenplatte, ihr Abstand zur Massebezugsfläche, die Form und Anordnung der Masseverbindung und die Lage des Signalverbindungspunktes haben wesentlichen Einfluß auf die elektrischen Eigenschaften der planaren IFA. Ihre Dimensionierung und Konstruktion ist daher wesentlich komplexer als bei der stabförmigen IFA.An increase in the bandwidth and the radiation efficiency is achieved by a planar design of the main radiator parallel to the ground reference surface. The short circuit to the ground reference surface is made via a strip-shaped connection. The signal line is connected to the planar area at a suitable location. The size and shape of the antenna plate, its distance to the ground reference surface, the shape and arrangement of the ground connection and the position of the signal connection point have a significant influence on the electrical properties of the planar IFA. Their dimensioning and construction is therefore much more complex than with the rod-shaped IFA.
Für Entwicklungsaufgaben ist eine IFA bekannt, die aus streifenförmigen Leiterbahnen auf einem Epoxidharz-Trägermaterial besteht. Die Leiterbahren liegen am Rand einer Platine neben der Massebezugsfläche. Die Grundfläche der Antenne mit den elektronischen Elementen für die Signalbearbeitung ist daher größer. Eine nachträgliche Abstimmung der geometrischen Einflußgrößen ist nicht möglich. Der Erfindung lag daher die Aufgabe zugrunde, eine einfach zu fertigende, nachträglich abstimmbare IFA mit omnidirektional konstanter Sende- / Empfangsleistung anzugeben, die platzsparend und ohne aufwändige Justierung mit der Massebezugsfläche und der Signalleitung auf einer Platine verbunden werden kann. Die Anordnung der IFA auf der Platine sollte eine Anpassung der Raumform an bestimmte Gehäuseformen ermöglichen und insbesondere bei handgehaltenen Geräten unabhängig von deren Ausrichtung eine weitgehend konstante Empfangsleistung sicherstellen. Diese Aufgabe wird bei einer Antenne der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß zwei im Winkel zueinander stehende Antennen vorgesehen sind, deren Signalverbindungen im Verhältnis zur Resonanzwellenlänge der Antenne nahe beieinander stehen und mit einem Signalvereiniger verbunden sind. Die Fußpunkte der Signal und Masseverbindungen sind zweckmäßigerweise mit nasenförmigen Vorsprüngen zum Einsetzen in Lötaugen einer Platine versehen. Der Winkel beträgt vorzugsweise 90°. Die Fläche des Hauptstrahlers kann in Längsrichtung auch gebogen sein.For development tasks, an IFA is known, which consists of strip-shaped tracks on an epoxy resin substrate. The ladders lie on the edge of a board next to the ground reference surface. The base of the antenna with the electronic elements for signal processing is therefore larger. Subsequent tuning of the geometric parameters is not possible. The invention therefore an object of the invention to provide an easy to manufacture, subsequently tunable IFA with omnidirectional constant transmission / reception power, which can be connected to save space and without costly adjustment to the ground reference surface and the signal line on a circuit board. The arrangement of the IFA on the board should allow an adaptation of the spatial shape of certain housing shapes and ensure a largely constant reception performance especially for hand-held devices, regardless of their orientation. This object is achieved in an antenna of the type mentioned in the present invention that two mutually angled antennas are provided, the signal connections are close to each other in relation to the resonance wavelength of the antenna and are connected to a signal combiner. The bases of the signal and ground connections are expediently provided with nose-shaped projections for insertion into pads of a circuit board. The angle is preferably 90 °. The surface of the main radiator can also be bent in the longitudinal direction.
Die Fertigung des Antennenelementes als einteiliges Element ermöglicht ein geschlossenes geometrisches Design unter Anwendung bekannter Simulations-Rechenprogramme. Die geometrischen Daten können direkt in eine CAD-gesteuerte Fertigungsanlage übertragen werden. Ein flacher Metallblech-Streifen kann sowohl mit Hilfe einer Laserschneidmaschine in der gewünschten Form ausgeschnitten oder die Form in einer Ätzanlage hergestellt werden. Für dieThe manufacture of the antenna element as a one-piece element allows a closed geometric design using known simulation computer programs. The geometric data can be transferred directly to a CAD-controlled production plant. A flat metal sheet strip can be cut out in the desired shape either with the aid of a laser cutting machine or the mold can be produced in an etching system. For the
Massenherstellung sind auch Stanzverfahren möglich. Die Wahl des Metalles kann den verschiedenen Herstellverfahren angepaßt werden.Mass production also punching possible. The choice of metal can be adapted to the different production methods.
Das fertige Antennenelement hat eine für die Handhabung zum Einbau und beim Betrieb günstige Steifigkeit. Da die Betriebsparameter von den geometrischen Dimensionen des Antennenelements abhängen, können diese nachträglich z.B. durch Schleifen, Fräsen, Feilen oder ähnliches nachgearbeitet werden. Die nasenförmigen Vorsprünge an den Fußpunkten können zur Montage in dafür vorgesehene Lötaugen in einer Platine eingesetzt werden. Dafür können sowohlThe finished antenna element has a stiffness for handling for installation and operation. Since the operating parameters of Depending on the geometric dimensions of the antenna element, these can be subsequently reworked eg by grinding, milling, filing or the like. The nose-shaped projections at the foot points can be used for mounting in designated solder pads in a circuit board. For that both can
Bestückungsroboter als auch ungeübte Hilfskräfte eingesetzt werden.Assembly robots are used as well as untrained auxiliary staff.
Die einstückige Form des Antennenelements mit den Einsetznasen ist der vorgesehenen Betriebsweise der Antenne mit Ausrichtung ihrer Fläche senkrecht zur Massebezugsfläche angepaßt. Diese Lösung steht im Gegensatz zu den bekannten Erfahrungen, nach denen die Fläche des Hauptstrahlers parallel zur Massebezugsfläche auszurichten ist, wenn eine Leistungssteigerung erreicht werden soll. In überraschender weise hat sich jedoch gezeigt, daß insbesondere bei handgehaltenen Geräten mit wechselnder Ausrichtung des Gerätes und damit der Antenne im Raum eine weitgehend konstante Empfangsleistung erreicht werden kann.The one-piece shape of the antenna element with the insertion lugs is adapted to the intended operation of the antenna with alignment of its surface perpendicular to the ground reference surface. This solution is in contrast to the known experience, according to which the surface of the main radiator is to be aligned parallel to the ground reference surface when an increase in performance is to be achieved. Surprisingly, however, it has been found that, in particular in hand-held devices with alternating orientation of the device and thus the antenna in the room a largely constant reception performance can be achieved.
Dieser Effekt kann damit erklärt werden, daß für im wesentlichen im Zenit stehende Sender bei waagerechter Ausrichtung des Empfangsgerätes die Dicke des Antennenstreifens wie eine herkömmliche stabförmige IFA wirkt. Bei zunehmender Neigung des Gerätes vergrößert sich die zum Zenit ausgerichtete effektive Dicke, so daß die erfindungsgemäße Antenne wie eine IFA mit kontinuierlich veränderbarem Stabdurchmesser arbeitet.This effect can be explained by the fact that, for a transmitter standing essentially in the zenith, with horizontal alignment of the receiving device, the thickness of the antenna strip acts like a conventional rod-shaped IFA. As the inclination of the device increases, the zenith-oriented effective thickness increases, so that the antenna according to the invention operates like an IFA with a continuously variable rod diameter.
Für im wesentlichen im Horizont stehende Sender und waagerechte Ausrichtung des Gerätes ist die Breite des Antennenstreifens für die Empfangsleistung bestimmend. Da in diesem Fall der effektive Stabdurchmesser einer äquivalenten stabförmigen IFA bei zunehmender Neigung des Gerätes abnimmt, ergibt sich eine bevorzugte Anwendung der erfindungsgemäßen Antennenanordnung für den GPS-Empfang.For essentially horizontal transmitter and horizontal alignment of the device, the width of the antenna strip is determinant of the received power. Since in this case the effective rod diameter of an equivalent rod-shaped IFA decreases with increasing inclination of the device, this results in a preferred application of the antenna arrangement according to the invention for GPS reception.
Bei handgehaltenen Geräten mit waagerecht liegenden stabförmigen Antennen ist zu beobachten, daß die Empfangsleistung bei einer Drehung um die zur waagerechten Ausrichtung senkrechte Achse mit zunehmender Abkehr vom Ort des Senders abnimmt. Bei der Anwendung der erfindungsgemäßen Antennenform hat sich in überraschender Weise herausgestellt, daß zwei gleiche Antennen im Winkel zueinander auf der Platine aufgestellt werden können, wenn darauf geachtet wird, daß ihre Signalverbindungen im Verhältnis zur Resonanzwellenlänge der Antennen nahe beieinander stehen. Da der Abstand zwischen dem Massekurzschluß und der Signaleinspeisung bei einer IFA üblicherweise wesentlich kleiner als die Länge des Hauptstrahlers ist, wird die vorgenannte Bedingung ohne weiteres erfüllt, wenn die freien Enden des Hauptstrahlers die Schenkel des Winkels zwischen den beiden Antennen bilden. Bei dieser Anordnung hat sich ergeben, daß die beiden Antennen sich wie eine einzige Antenne verhalten, wenn ihre Signalverbindungen über einen Signalvereiniger verbunden werden. Die bei einer Drehung entstehende Verringerung der Empfangsleistung der einen Antenne wird durch eine entsprechende Steigerung der Empfangsleistung der anderen Antenne ergänzt. Die üblicherweise bei der Zusammenschaltung von Antennen auftretenden Interferenzen der Signale durch Phasenverschiebungen sind nicht zu beobachten. Die Rundumwirkung der neuen Antennen kann noch dadurch verbessert werden, daß die Flächen des Hauptstrahlers in Längsrichtung gebogen werden. Dies ermöglicht zusätzlich eine Anpassung der Antennenanordnung an zylindrische Gehäusedeckel, wie sie z.B. bei Empfangsgeräten zur Montage auf Fahrzeugen verwendet werden.In hand-held devices with horizontal rod-shaped antennas can be observed that the receiving power decreases with a rotation about the axis perpendicular to the horizontal alignment with increasing departure from the location of the transmitter. In the application of the antenna form according to the invention has surprisingly been found that two identical antennas can be placed at an angle to each other on the board, if it is ensured that their signal connections are close to each other in relation to the resonance wavelength of the antennas. Since the distance between the ground short-circuit and the signal feed in an IFA is usually much smaller than the length of the main radiator, the aforementioned condition is easily met if the free ends of the main radiator form the legs of the angle between the two antennas. With this arrangement, it has been found that the two antennas behave as a single antenna when their signal connections are connected via a signal combiner. The resulting reduction in the reception power of one antenna is complemented by a corresponding increase in the reception power of the other antenna. The interference of the signals due to phase shifts usually occurring in the interconnection of antennas can not be observed. The all-round effect of the new antennas can be further improved by bending the surfaces of the main radiator in the longitudinal direction. This additionally enables an adaptation of the antenna arrangement to cylindrical housing covers, as used for example in receivers for mounting on vehicles.
Ausführungsbeispiele der erfindungsgemäßen Antenne und derEmbodiments of the antenna according to the invention and the
Anordnung auf einer Platine sind in der Zeichnung schematisch dargestellt und werden nachfolgend beschrieben. Dabei zeigenArrangement on a board are shown schematically in the drawing and are described below. Show
Fig.1 eine Ansicht der Antenne und1 shows a view of the antenna and
Fig.2 eine Anordnung von zwei im Winkel zueinander stehenden Antennen auf einer Platine.2 shows an arrangement of two mutually angled antennas on a circuit board.
Fig.1 zeigt in einer Ansicht eine aus einem flachen Metallblech-Streifen einstückig gefertigte IFA mit Hauptstrahler 1 , Signalverbindung 2 und Masseverbindung 3. An den Fußpunkten der Signalverbindung 2 und der Masseverbindung 3 sind nasenförmige Vorsprünge 4, 4' vorgesehen. Die üblichen geometrischen Einflußgrößen L, H und S sind angegeben. Die Höhe H ist auf eine Massebezugsfläche 5 bezogen. Die Länge L entspricht einem Viertel der Resonanzwellenlänge der Antenne.1 shows a view of an integrally made of a flat sheet metal strip IFA with main radiator 1, signal connection 2 and ground connection 3. At the foot of the signal connection 2 and the ground connection 3 nose-shaped projections 4, 4 'are provided. The usual geometric parameters L, H and S are given. The height H is based on a mass reference surface 5. The length L corresponds to a quarter of the resonance wavelength of the antenna.
Fig.2 zeigt die Anordnung von zwei im rechten Winkel zueinander und senkrecht auf einer Platine 6 mit Massebezugsfläche 5 stehende Antennen 1 , 1'. Die Signalverbindungen 2, 2' stehen nahe beieinander und werden über Leiterbahnen an einen Signalvereiniger 7 geführt. Anstelle der gestreckten Ausrichtung der Hauptstrahler 1 , 1' können diese auch in Längsrichtung gebogen sein. Bezuqszeichenliste2 shows the arrangement of two at right angles to each other and perpendicular to a board 6 with ground reference surface 5 standing antennas 1, 1 '. The signal connections 2, 2 'are close to one another and are guided via conductor tracks to a signal combiner 7. Instead of the elongated alignment of the main radiators 1, 1 ', these can also be bent in the longitudinal direction. LIST OF REFERENCES
1 ,1' Hauptstrahler1, 1 'main radiator
2,2' Signalverbindung2,2 'signal connection
3,3' Masseverbindung 4,4' nasenförmige Vorsprünge3,3 'ground connection 4,4' nose-shaped projections
5 Massebezugsfläche5 ground reference area
6 Platine6 board
7 Signalvereiniger7 signal combiner
L Gesamtlänge Hauptstrahler H Abstand des Hauptstrahlers zur MassebezugsflächeL Overall length main radiator H Distance of the main radiator to the ground reference surface
S Abstand Signalverbindung und Masseverbindung S Distance signal connection and earth connection

Claims

Patentansprücheclaims
1) Inverted F-Antenne (IFA) mit einem streifenförmigen Hauptstrahler (1, 1") und dazu senkrecht ausgerichteten streifenförmigen Signal- (2, 2') und Masseverbindungen (3, 3'), bei der die Masseverbindung (3, 3') einem Ende des Hauptstrahlers (1 , 1') zugeordnet und die1) Inverted F antenna (IFA) with a strip-shaped main radiator (1, 1 ") and perpendicularly oriented strip-shaped signal (2, 2 ') and ground connections (3, 3'), wherein the ground connection (3, 3 ' ) associated with one end of the main radiator (1, 1 ') and the
Signalverbindung (2, 2') dazu benachbart angeordnet ist, wobei die Antenne als einteiliges Element aus einem flachen Metallblech- Streifen gefertigt und die Fläche des Hauptstrahlers (1 , 1') senkrecht zur Massebezugsfläche (5) ausgerichtet ist, dadurch gekennzeichnet, daß zwei im Winkel zueinander stehende Antennen vorgesehen sind, deren Signalverbindungen (2, 2') im Verhältnis zur Resonanzwellenlänge der Antennen nahe beieinander stehen und mit einem Signalvereiniger (7) verbunden sind.Signal connection (2, 2 ') adjacent thereto, wherein the antenna is made as a one-piece element of a flat metal sheet strip and the surface of the main radiator (1, 1') is aligned perpendicular to the ground reference surface (5), characterized in that two Angled antennas are provided, whose signal connections (2, 2 ') are close to each other in relation to the resonance wavelength of the antennas and are connected to a signal combiner (7).
2) Antenne nach Anspruch 1 , dadurch gekennzeichnet, daß die Fußpunkte der Signal- (2, 2') und Masseverbindungen (3, 3") mit nasenförmigen Vorsprüngen (4, 4') zum Einsetzen in Lötaugen einer Platine (6) versehen sind.2) Antenna according to claim 1, characterized in that the base points of the signal (2, 2 ') and ground connections (3, 3 ") with nose-shaped projections (4, 4') for insertion into pads of a board (6) are provided ,
3) Antenne nach Anspruch 1 , dadurch gekennzeichnet, daß der Winkel 90° beträgt. 4) Antenne nach Anspruch 1 , dadurch gekennzeichnet, daß die Fläche des Hauptstrahlers (1 , 1') in Längsrichtung gekrümmt ist. 3) Antenna according to claim 1, characterized in that the angle is 90 °. 4) Antenna according to claim 1, characterized in that the surface of the main radiator (1, 1 ') is curved in the longitudinal direction.
PCT/DE2007/001334 2006-07-30 2007-07-28 Inverted f-antenna WO2008014762A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610035680 DE102006035680A1 (en) 2006-07-30 2006-07-30 Inverted F-Antenna, has measuring connection attached to end of main emitter and signal connection arranged adjacent to measuring connection, where antenna is produced as single-piece unit made of flat metal-sheet strips
DE102006035680.2 2006-07-30

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WO2008014762A1 true WO2008014762A1 (en) 2008-02-07

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2023028421A1 (en) * 2021-08-24 2023-03-02 Shure Acquisition Holdings, Inc. Quadrature antenna for portable wireless applications

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013114223B4 (en) * 2013-12-06 2021-08-05 Hörmann KG Antriebstechnik REMOTE CONTROLLED DOOR OR DRIVE DEVICE WITH MAGNETIC ANTENNA

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US20010040528A1 (en) * 2000-05-12 2001-11-15 Ari Vaisanen Symmetrical antenna structure and a method for its manufacture as well as an expansion card applying the antenna structure
EP1291968A1 (en) * 2000-06-08 2003-03-12 Matsushita Electric Industrial Co., Ltd. Antenna and radio device comprising the same
GB2404497A (en) * 2003-07-30 2005-02-02 Peter Bryan Webster PCB mounted antenna
EP1503450A1 (en) * 2000-09-19 2005-02-02 Sony Corporation Antenna device and radio communication card module having antenna device
US20050093752A1 (en) * 2003-10-31 2005-05-05 Ping-Xi Cheng Antenna set for mobile devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010040528A1 (en) * 2000-05-12 2001-11-15 Ari Vaisanen Symmetrical antenna structure and a method for its manufacture as well as an expansion card applying the antenna structure
EP1291968A1 (en) * 2000-06-08 2003-03-12 Matsushita Electric Industrial Co., Ltd. Antenna and radio device comprising the same
EP1503450A1 (en) * 2000-09-19 2005-02-02 Sony Corporation Antenna device and radio communication card module having antenna device
GB2404497A (en) * 2003-07-30 2005-02-02 Peter Bryan Webster PCB mounted antenna
US20050093752A1 (en) * 2003-10-31 2005-05-05 Ping-Xi Cheng Antenna set for mobile devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023028421A1 (en) * 2021-08-24 2023-03-02 Shure Acquisition Holdings, Inc. Quadrature antenna for portable wireless applications

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