EP0616383B1 - Antenna device for hand-held portable transceivers - Google Patents
Antenna device for hand-held portable transceivers Download PDFInfo
- Publication number
- EP0616383B1 EP0616383B1 EP94103992A EP94103992A EP0616383B1 EP 0616383 B1 EP0616383 B1 EP 0616383B1 EP 94103992 A EP94103992 A EP 94103992A EP 94103992 A EP94103992 A EP 94103992A EP 0616383 B1 EP0616383 B1 EP 0616383B1
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- European Patent Office
- Prior art keywords
- antenna
- antenna device
- matching line
- branches
- circuit board
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- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims 2
- 230000001154 acute effect Effects 0.000 claims 1
- 230000006978 adaptation Effects 0.000 claims 1
- 230000021615 conjugation Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
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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
Definitions
- the invention relates to an antenna arrangement for portable radio devices.
- Handheld radio devices are understood here to mean devices which communicate via radio and which can be handled manually without any problems, in particular easily and can be carried at any time. These include e.g. Mobile devices and especially the handsets of cordless telephony, but not devices whose mobile use only makes sense in combination with a vehicle.
- Cordless phones are well known today. They each have a basic device and a handheld device.
- the base unit is arranged relatively stationary and connected to the telephone network like a conventional telephone via a connecting line.
- the hand-held device can be moved freely within a range of the order of 100 m, the connection to the base device being made in full duplex via one or two radio channels. Both devices are comparable in size and weight to conventional telephones.
- Cordless phones like all telecommunications facilities, are subject to high cost pressures. There is therefore the general task, e.g. The handheld devices of cordless telephones are not only easy, durable, ergonomic and elegant to train, but also advanced in terms of their technical functions, in accordance with all relevant standards, suitable for production and, above all, inexpensive. If the last is unsuccessful, market success is virtually impossible.
- Telescopic antennas for example, are known as antennas for portable radio devices.
- the length of the antenna aligns depends on the radio frequency used and is still a few centimeters at frequencies in the GigaHertz range.
- the antenna forms a component protruding from the housing of the device, which is specially attached, connected and protected against damage.
- a dipole antenna integrated in a portable radio is known from document EP-A-0 117 283.
- Fig. 1 shows a schematic representation of an antenna arrangement, as it can be used in portable radio devices.
- the arrangement has an antenna 10 and a matching line 15.
- the antenna 10 and the matching line 15 are matched to one another such that the input or output impedance of the antenna and the impedance of the matching line 15 are the same.
- this impedance is, for example, 50 ⁇ .
- the antenna 10 is now preferably designed as a half-wave dipole.
- This dipole essentially has two equally long, symmetrical antenna arms 11, 12, the length of which in vacuum would correspond to half the wavelength / 2 of the resonance frequency. With a current working frequency of 1.890 GHz, for example, this length would be about 8 cm. Due to the dielectric properties of the surroundings of the antenna arms 11, 12, however, the length mentioned is significantly reduced.
- the matching line 15 is arranged centrally to the antenna 10 and transversely to the latter.
- the adapter line is at one end to one of the antenna arms, e.g. the arm 11 connected and with its other end to electronic circuits, not shown, in particular transmitting and receiving circuits.
- the structure of the matching line comprises two different, high-resistance microstrip conductors 17.1, 17.2 and two different capacitors 18.1, 18.2, which are grounded with one of their poles.
- the microstrip conductors 17 represent high impedance RL impedances, the capacitors 18 RC impedances.
- the overall result for the matching line 15 is the behavior of an LC impedance, the value of which can be varied by changing the values of the individual elements (17.1, 17.2, 18.1, 18.2).
- FIG. 2 shows a first, practical exemplary embodiment of an antenna arrangement corresponding to FIG. 1.
- a load-bearing circuit board 20 coated on both sides is shown in perspective view, preferably a board based on glass epoxy.
- the antenna arms 11, 12 are arranged as printed conductor tracks.
- the matching line 15 is connected. This includes the high-resistance, printed microstrip lines 17.1, 17.2, to which the capacitors 18.1, 18.2 are connected as discrete components.
- the microstrip lines 17 are meandering, with between two legs in the manner of Ladder rungs are arranged several cross connections. These cross connections can be cut individually, starting from the open side. This makes it possible to gradually increase the length of the microstrip lines and thus to trim the RL impedance of these line sections.
- the two microstrip lines 17.1 and 17.2 of FIG. 1 thus essentially correspond to the two conductor-shaped line sections together with their edge regions.
- the adapter line 15 is either directly connected to an electronic circuit, e.g. connected to a transmission amplifier or to a line of a predetermined characteristic impedance, in particular a 50 ⁇ line 28.
- a relatively large mass area 22 is arranged on the other side 21 of the plate 20, which is lower in FIG. 2.
- This hatched area 22 is at ground potential and interacts with the matching line 15, but not with the antenna 10. Its shape is therefore chosen so that it completely covers the area of the matching line 15 and the vast majority of the electronic circuits, the antenna arms 11, 12, on the other hand, leaves it essentially completely uncovered.
- the ground surface 22 extends with a relatively pointed end 23 to the center of the antenna, where the inner end of the antenna arm 12 is connected to the ground surface 22 through the plate 20 and is thus grounded.
- the capacitors 18 are also connected with their one connection poles through the printed circuit board 20 to the ground surface 22 and are therefore on one side at the reference potential zero.
- the antenna arrangement described is simple in construction and, above all, in the technology of conventional ones printed circuit boards can be produced. This has the particular advantage that the antenna arrangement can be produced together with the wiring pattern of the electronic circuits of, for example, a handheld device of a cordless telephone, in particular on a single, common plate 20. This then saves further fastening means in the handheld device and simplifies assembly.
- the arms 11, 12 of the antenna 10 are approximately linear in accordance with FIGS. 1 and 2 and lie essentially on a common straight line.
- the following figures show a schematic view of variants of the antenna 10, which are also mirror-symmetrical.
- FIG. 3 shows the first variant of an antenna, the arms 111, 112 of which are angled in an L-shape, the inner, facing legs of the antenna arms lying on a common straight line.
- 4 shows, as a second variant, an antenna 10 with arms 211, 212 shaped in a circular arc. These arms lie on a common circle.
- 5 shows, as a third variant, an antenna 10 in which the arms 311, 312 are wave-shaped in their inner, mutually facing regions and linear in their outer regions.
- FIG. 6 shows, as a fourth variant, an antenna 10 in which, compared to the third variant (FIG. 5), the linear and the wavy regions of the arms 311, 312 are interchanged.
- Each of the antennas 10 described so far forms a planar half-wave dipole with mirror-symmetrical antenna arms 11, 12; 111, 112; 211, 212; 311, 312.
- the arms rest completely on a single side (for example 19) of the printed circuit board 20 and are preferably designed as printed conductor tracks.
- Glass epoxy is mentioned as the preferred material for the printed circuit board 20.
- other material is also possible, for example ceramic material which the antenna arms are made in the screen printing process according to the thick film technology. It is generally important for the antenna 10 that it is close to the plate edge 25 of the plate 20. This applies to their entire course, i.e. to both arms and the entire extension of the arms.
- the antenna is formed in two layers and of the same shape on both sides 19, 21 of the plate 20, with a large number of connections 31 through the plate 20 intimately affecting the two antenna halves connect with each other.
- the connections 31 can be easily and essentially automatically plated through drilled holes in the plate 20.
- FIG. 8 shows the section across a further antenna 10.
- This antenna is predominantly arranged on the front edge 25 of a printed circuit board 20.
- the edge area of both sides 19, 21 of the plate 20 is covered with mutually associated conductor tracks which are electrically connected to one another around the plate edge, e.g. by plating 26.
- FIG. 9 shows the section across another antenna 10.
- one arm 411 lies on one side 19 of the printed circuit board 20 and the other arm 412 lies on the other side 21.
- This construction makes the hole through the plate 20 superfluous, which leads according to FIG. 2 from the other antenna arm to the end 23 of the ground surface 22.
- the invention results in an essential, technical development step in terms of producibility, which is reflected in the reduction in manufacturing costs. There are no fundamental limits to the application. However, it is particularly useful to use it in handy devices for general use, in particular in cordless telephony handsets and the associated basic devices.
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Abstract
Description
Die Erfindung betrifft eine Antennenanordnung für in der Hand tragbare Funkgeräte.The invention relates to an antenna arrangement for portable radio devices.
Unter in der Hand tragbaren Funkgeräten werden hier Geräte verstanden, die über Funk kommunizierend und die problemlos manuell handhabbar, insbesondere leicht und jederzeit tragbar sind. Hierzu gehören z.B. Mobilfunkgeräte und vor allem die Handapparate der Schnurlostelefonie, jedoch keine Geräte, deren mobiler Einsatz nur in Kombination mit einem Fahrzeug sinnvoll ist.Handheld radio devices are understood here to mean devices which communicate via radio and which can be handled manually without any problems, in particular easily and can be carried at any time. These include e.g. Mobile devices and especially the handsets of cordless telephony, but not devices whose mobile use only makes sense in combination with a vehicle.
Schnurlostelefone sind heute allgemein bekannt. Sie weisen jeweils ein Basisgerät und ein Handgerät auf. Das Basisgerät ist relativ ortsfest angeordnet und über eine Anschlussleitung wie ein herkömmliches Telefon mit dem Telefonnetz verbunden. Das Handgerät ist dagegen in einem Umkreis der Grössenordnung 100 m frei bewegbar, wobei die Verbindung zum Basisgerät im Vollduplex über einen oder zwei Funkkanäle erfolgt. Beide Geräte sind in Grösse und Gewicht mit konventionellen Telefonen vergleichbar.Cordless phones are well known today. They each have a basic device and a handheld device. The base unit is arranged relatively stationary and connected to the telephone network like a conventional telephone via a connecting line. In contrast, the hand-held device can be moved freely within a range of the order of 100 m, the connection to the base device being made in full duplex via one or two radio channels. Both devices are comparable in size and weight to conventional telephones.
Schnurlostelefone stehen heute wie alle Einrichtungen der Telekommunikation unter einem hohen Kostendruck. Es besteht daher die allgemeine Aufgabe, z.B. die Handgeräte von Schnurlostelefonen nicht nur leicht, dauerhaft, ergonomisch und formschön auszubilden, sondern auch bezüglich ihrer technischen Funktionen fortschrittlich, allen einschlägigen Normen entsprechend, fertigungsgerecht und dazu vor allem preiswert. Gelingt das letzte nicht, ist ein Markterfolg so gut wie ausgeschlossen.Cordless phones, like all telecommunications facilities, are subject to high cost pressures. There is therefore the general task, e.g. The handheld devices of cordless telephones are not only easy, durable, ergonomic and elegant to train, but also advanced in terms of their technical functions, in accordance with all relevant standards, suitable for production and, above all, inexpensive. If the last is unsuccessful, market success is virtually impossible.
Als Antenne für in der Hand tragbare Funkgeräte sind z.B. Teleskopantennen bekannt. Die Länge der Antenne richtet sich nach der verwendeten Funkfrequenz und beträgt bei Frequenzen im GigaHertzbereich noch einige Zentimeter. Die Antenne bildet jeweils ein aus dem Gehäuse des Gerätes herausragendes Bauteil, das speziell befestigt, angeschlossen und gegenüber Beschädigungen geschützt ist.Telescopic antennas, for example, are known as antennas for portable radio devices. The length of the antenna aligns depends on the radio frequency used and is still a few centimeters at frequencies in the GigaHertz range. The antenna forms a component protruding from the housing of the device, which is specially attached, connected and protected against damage.
Eine Dipolantenne, die in einem tragbaren Funkgerät integriert ist, ist aus dem Dokument EP-A- 0 117 283 bekannt.A dipole antenna integrated in a portable radio is known from document EP-A-0 117 283.
Im Rahmen der genannten allgemeinen Aufgabe besteht nun ein Detailproblem darin, für den Bereich der Geräteantennen eine gegenüber dem bisherigen bessere Lösung zu finden.In the context of the general task mentioned, a detailed problem now consists in finding a better solution for the area of the device antennas compared to the previous one.
Die Lösung dieses Detailproblems bzw. der konkretisierten Aufgabe ist durch den kennzeichnenden Teil von Anspruch 1 gegeben. Die Lösung bringt in fertigungstechnischer und preislicher Hinsicht einen wesentlichen Fortschritt. Die abhängigen Ansprüche geben Ausgestaltungen der Erfindung an.The solution to this detail problem or the specific task is given by the characterizing part of claim 1. The solution brings significant progress in terms of production technology and price. The dependent claims provide embodiments of the invention.
Im folgenden wird die Erfindung anhand von neun Figuren beispielsweise näher beschrieben. Es zeigen:
- Fig. 1 - Schematische Darstellung einer Antennen-Anordnung
- Fig. 2 - Perspektivische Ansicht eines ersten Ausführungsbeispiels
- Fig. 3 bis 9 - Varianten von Antennen.
- Fig. 1 - Schematic representation of an antenna arrangement
- Fig. 2 - perspective view of a first embodiment
- 3 to 9 - Variants of antennas.
Fig. 1 zeigt eine schematische Darstellung einer Antennen-Anordnung, wie sie bei in der Hand tragbaren Funkgeräten einsetzbar ist. Die Anordnung weist eine Antenne 10 und eine Anpassleitung 15 auf. Die Antenne 10 und die Anpassleitung 15 sind so aufeinander abgestimmt, dass die Eingangs- bzw. Ausgangsimpedanz der Antenne und die Impedanz der Anpassleitung 15 gleich sind. Im noch zu beschreibenden, bevorzugten Ausführungsbeispiel beträgt diese Impedanz beispielsweise 50 Ω.Fig. 1 shows a schematic representation of an antenna arrangement, as it can be used in portable radio devices. The arrangement has an
Die Antenne 10 ist nun bevorzugt als Halbwellendipol ausgebildet. Dieser Dipol besitzt zwei im wesentlichen gleich lange, symmetrische Antennenarme 11, 12, deren Länge im Vakuum insgesamt der halben Wellenlänge /2 der Resonanzfrequenz entsprechen würde. Bei einer heute üblichen Arbeitsfrequenz von z.B. 1,890 GHz wäre diese Länge etwa 8 cm. Durch die dielektrischen Eigenschaften der Umgebung der Antennenarme 11, 12 wird die genannte Länge jedoch sehr massgeblich verringert.The
Die Anpassleitung 15 ist mittig zur Antenne 10 und quer zu dieser angeordnet. Die Anpassleitung ist mit ihrem einen Ende an den einen der Antennenarme, z.B. den Arm 11 angeschlossen und mit ihrem anderen Ende an nicht gezeigte Elektronikschaltkreise, insbesondere Sende- und Empfangsschaltkreise. Der Aufbau der Anpassleitung umfasst zwei unterschiedliche, hochohmige Microstrip-Leiter 17.1, 17.2 und zwei unterschiedliche Kondensatoren 18.1, 18.2, die mit ihren einen Polen an Masse liegen. Die Microstrip-Leiter 17 stellen bei Hochfrequenz RL-Impedanzen dar, die Kondensatoren 18 RC-Impedanzen. Gesamthaft ergibt sich für die Anpassleitung 15 das Verhalten einer LC-Impedanz, deren Wert durch Verändern der Werte der einzelnen Elemente (17.1, 17.2, 18.1, 18.2) variierbar ist.The
Fig. 2 zeigt ein erstes, praktisches Ausführungsbeispiel einer Antennenanordnung entsprechend Fig. 1. In perspektivischer Ansicht ist eine tragende, zweiseitig beschichtete Leiterplatte 20 dargestellt, bevorzugt eine Platte auf der Basis von Glasepoxyd. Auf der einen, in der Darstellung oberen Seite 19 der Platte 20 und nahe am Plattenrand 25, sowie parallel zu diesem Rand 25 sind die Antennenarme 11, 12 als gedruckte Leiterzüge angeordnet. Am Kontaktende des einen Armes 11 ist die Anpassleitung 15 angeschlossen. Diese umfasst die hochohmigen, gedruckten Microstrip-Leitungen 17.1, 17.2, an die die Kondensatoren 18.1, 18.2 als diskrete Bauelemente angeschlossen sind.FIG. 2 shows a first, practical exemplary embodiment of an antenna arrangement corresponding to FIG. 1. A load-bearing
Die Microstrip-Leitungen 17 sind mäanderförmig geführt, wobei zwischen jeweils zwei Schenkeln in Art von Leitersprossen mehrere Querverbindungen angeordnet sind. Diese Querverbindungen lassen sich einzeln und beginnend von der offenen Seite her durchtrennen. Hierdurch besteht die Möglichkeit, die Länge der Microstrip-Leitungen schrittweise zu vergrössern und damit die RL-Impedanz dieser Leitungsabschnitte zu trimmen. Den beiden Microstrip-Leitungen 17.1 und 17.2 von Fig. 1 entsprechen damit im wesentlichen die beiden leiterförmigen Leitungsabschnitte samt deren Randbereichen.The microstrip lines 17 are meandering, with between two legs in the manner of Ladder rungs are arranged several cross connections. These cross connections can be cut individually, starting from the open side. This makes it possible to gradually increase the length of the microstrip lines and thus to trim the RL impedance of these line sections. The two microstrip lines 17.1 and 17.2 of FIG. 1 thus essentially correspond to the two conductor-shaped line sections together with their edge regions.
Die Anpass-Leitung 15 ist an ihrem der Antenne 10 abgekehrten Ende entweder direkt mit einem elektronischen Schaltkreis, z.B. einem Sendeverstärker verbunden oder mit einer Leitung von vorgegebenem Wellenwiderstand, insbesondere einer 50-Ω-Leitung 28.The
Auf der in Fig. 2 unteren, anderen Seite 21 der Platte 20 ist eine relativ grossflächige Masse-Fläche 22 angeordnet. Diese schraffiert dargestellte Fläche 22 liegt auf Erdpotential und wirkt mit der Anpassleitung 15 zusammen, jedoch nicht mit der Antenne 10. Ihre Form ist daher so gewählt, dass sie den Bereich der Anpassleitung 15 und den weitaus überwiegenden Teil der elektronischen Schaltkreise vollständig abdeckt, die Antennenarme 11, 12 dagegen im wesentlichen vollständig unabgedeckt lässt. Als Ausnahme dieser Regel reicht die Masse-Fläche 22 mit einem relativ spitz auslaufenden Ende 23 bis zur Antennen-Mitte, wo das innere Ende des Antennenarms 12 durch die Platte 20 hindurch mit der Masse-Fläche 22 verbunden und damit geerdet ist.A relatively large mass area 22 is arranged on the
Die Kondensatoren 18 sind ebenfalls mit ihren einen Anschlusspolen durch die Leiterplatte 20 hindurch mit der Masse-Fläche 22 verbunden und liegen damit einseitig auf dem Bezugspotential Null.The capacitors 18 are also connected with their one connection poles through the printed
Die beschriebene Antennen-Anordnung ist im Aufbau einfach und vor allem in der Technik der konventionellen gedruckten Leiterplatten herstellbar. Dies hat den besonderen Vorteil, dass die Antennen-Anordnung zusammen mit dem Verdrahtungsmuster der elektronischen Schaltkreise eines z.B. Handgerätes eines Schnurlostelefons herstellbar ist, insbesondere auf einer einzigen, gemeinsamen Platte 20. Dies spart dann weiter Befestigungsmittel im Handgerät und vereinfacht die Montage.The antenna arrangement described is simple in construction and, above all, in the technology of conventional ones printed circuit boards can be produced. This has the particular advantage that the antenna arrangement can be produced together with the wiring pattern of the electronic circuits of, for example, a handheld device of a cordless telephone, in particular on a single,
Die Arme 11, 12 der Antenne 10 sind entsprechend den Figuren 1 und 2 etwa linear und liegen im wesentlichen auf einer gemeinsamen Geraden. Die nachfolgenden Figuren zeigen in schematischer Ansicht Varianten der Antenne 10, die ebenfalls spiegelsymmetrisch ausgebildet sind.The
Fig. 3 zeigt als erste Variante eine Antenne, deren Arme 111, 112 L-förmig gewinkelt sind, wobei die inneren, einander zugekehrten Schenkel der Antennenarme auf einer gemeinsamen Geraden liegen.
Fig. 4 zeigt als zweite Variante eine Antenne 10 mit kreisbogenförmig geformten Armen 211, 212. Hierbei liegen diese Arme auf einem gemeinsamen Kreis.
Fig. 5 zeigt als dritte Variante eine Antenne 10, bei der die Arme 311, 312 in ihren inneren, einander zugekehrten Bereichen wellenförmig ausgebildet sind und in ihren äusseren Bereichen linear.
Fig. 6 zeigt als vierte Variante eine Antenne 10, bei der im Vergleich zur dritten Variante (Fig. 5) die linearen und die wellenförmigen Bereiche der Arme 311, 312 miteinander vertauscht sind.3 shows the first variant of an antenna, the
4 shows, as a second variant, an
5 shows, as a third variant, an
FIG. 6 shows, as a fourth variant, an
Jede der bis hierher beschriebenen Antennen 10 bildet einen planaren Halbwellendipol mit spiegelsymmetischen Antennenarmen 11, 12; 111, 112; 211, 212; 311, 312. Die Arme liegen vollständig auf einer einzigen Seite (z.B. 19) der Leiterplatte 20 auf und sind bevorzugt als gedruckte Leiterzüge ausgebildet. Als bevorzugtes Material für die Leiterplatte 20 wird Glasepoxyd genannt. Es ist jedoch auch anderes Material möglich, z.B. Keramikmaterial, auf dem die Antennenarme im Siebdruckverfahren entsprechend der Dickfilmtechnik hergestellt sind. Wichtig für die Antenne 10 ist generell, dass sie nahe zum Plattenrand 25 der Platte 20 liegt. Dies gilt für ihren gesamten Verlauf, also für beide Arme und die gesamte Ausdehnung der Arme.Each of the
Fig. 7 zeigt eine weitere Antenne 10, dargestellt im Schnitt durch eine Leiterplatte 20. Hiernach ist die Antenne zweischichtig und formgleich auf beiden Seiten 19, 21 der Platte 20 ausgebildet, wobei eine Vielzahl von Verbindungen 31 durch die Platte 20 hierdurch die beiden Antennenhälften innig miteinander verbinden. Die Verbindungen 31 sind problemlos und im wesentlichen automatisch durch gebohrte Löcher in der Platte 20 durchplattierbar.7 shows a
Fig. 8 zeigt den Schnitt quer durch eine weitere Antenne 10. Diese Antenne ist vorwiegend am stirnseitigen Plattenrand 25 einer Leiterplatte 20 angeordnet. Hierzu ist der Randbereich beider Seiten 19, 21 der Platte 20 mit einander zugeordneten Leiterbahnen belegt, die um die Plattenkante herum elektrisch miteinander verbunden sind, z.B. durch eine Plattierung 26.8 shows the section across a
Fig. 9 zeigt den Schnitt quer durch eine weitere Antenne 10. Bei dieser Antenne liegt der eine Arm 411 auf der einen Seite 19 der Leiterplatte 2o und der andere Arm 412 auf deren anderer Seite 21. Durch diesen Aufbau wird die Bohrung durch die Platte 20 überflüssig, die entsprechend Fig. 2 vom anderen Antennenarm aus zum Ende 23 der Masse-Fläche 22 führt.FIG. 9 shows the section across another
Die beschriebene Antennenanordnung lässt eine ganze Reihe weiterer Variationen zu. Nachfolgend werden einige Beispiele angegeben:
Die Leiterplatte 20 kann nach der sogenannten Dickfilmtechnik mit Hilfe des Siebdrucks hergestellt sein anstatt in der konventionellen Ätztechnik.- Die Dicke und die
11, 12 können variieren.Oberflächeneigenschaften der Antennenarme - Es lassen sich die
11, 12 als Stanzteile aus Metallblech herstellen und auf dieAntennenarme Leiterplatte 20 aufkleben. Die Leiterplatte 20 kann mehrschichtig aufgebaut sein, wobei dann im Bereich der Antennenarme 11, 12 sämtliche Metallschichten entfernt sein müssen.Die Antenne 10 kann anders als eine Halbwellen-Dipol ausgebildet sein, z.B. als einarmige Stabantenne oder als Schlitzantenne.
- The printed
circuit board 20 can be produced using the so-called thick film technique with the aid of screen printing instead of the conventional etching technique. - The thickness and surface properties of the
11, 12 can vary.antenna arms - The
11, 12 can be produced as stamped parts from sheet metal and glued onto the printedantenna arms circuit board 20. - The printed
circuit board 20 can have a multilayer structure, in which case all metal layers must then be removed in the region of the 11, 12.antenna arms - The
antenna 10 can be designed differently than a half-wave dipole, for example as a single-arm rod antenna or as a slot antenna.
Insgesamt ergibt sich durch die Erfindung ein wesentlicher, technischer Entwicklungsschritt in Bezug auf die Fertigbarkeit, was sich in der Reduzierung der Herstellungskosten zeigt. Der Anwendung sind keine grundsätzlichen Grenzen gezogen. Sinnvoll ist jedoch vor allem die Verwendung in handlichen Geräten für den allgemeinen Gebrauch, insbesondere in Handgeräten der Schnurlostelefonie und den zugehörigen Basisgeräten.Overall, the invention results in an essential, technical development step in terms of producibility, which is reflected in the reduction in manufacturing costs. There are no fundamental limits to the application. However, it is particularly useful to use it in handy devices for general use, in particular in cordless telephony handsets and the associated basic devices.
Claims (10)
- Antenna device for a hand-held portable transceiver, wherethe transceiver comprises a circuit board (20) which carries at least a substantial part of the electronic circuits of the appliance as well as the connections between them, and wherethe antenna device includes the actual antenna, its mount and its electronic adaptation to the transmitting and receiving circuits,characterised in that- a half-wave dipole antenna is disposed in a border area of the circuit board (20) and essentially extends along the edge (25) of the circuit board,- this antenna (10) comprises two essentially mirror-symmetrical antenna branches (11, 12; 111, 112; 211, 212; 311, 312),- the inner end of one of the antenna branches (11, 111, 211, 311) is connected by a matching line (15) to the electronic circuits while the inner end of the other antenna branch (12, 112, 212, 312) is connected to a grounding surface (22), the input impedance of the antenna (10) and the impedance of the matching line (15) being adapted to each other, and in that- the areas of the circuit board (20) near the antenna (10) are essentially free of any other conductors.
- Antenna device according to claim 1, characterised in that
the configuration of the antenna branches (11, 12) is essentially linear and that they lie on a common straight line. - Antenna device according to claim 1, characterised in that
the antenna branches (111, 112) have an angled, L-shaped configuration where two of the L legs lie on a common straight line while the other two L legs are parallel to each other. - Antenna device according to claim 1, characterised in that
the antenna branches (211, 212) have an essentially circle arc-shaped configuration and lie on a common semicircle. - Antenna device according to claim 1, characterised in that
the antenna branches (311, 312) have a partially linear and otherwise wave-shaped configuration. - Antenna device according to claim 1, characterised in that- the circuit board (20) comprises at least two conductor layers,- at least one of the antenna branches (11, 111, 211, 311) is in the form of a printed conductor strip from one of the conductor layers,- the matching line (15) is at least partially also formed of that conductor layer,- a grounding surface (22) is formed from another one of the conductor layers, said surface covering in conjugation at least the area of the matching line (15) and leaving the area of the antenna branches (11, 12; 111, 112; 211, 212; 311, 312; 411, 412) uncovered, and in thatthe other antenna branch (12, 112, 212, 312) is connected to the grounding surface (22).
- Antenna device according to claim 6, characterised in that
the grounding surface (22) fills the greatest part of the other conductor layer, the grounding surface (22) forming a relatively acute taper in the area of the matching line (15) and towards the inner ends of the antenna branches (11, 12). - Antenna device according to claim 1, characterised in that
the matching line (15) comprises at least one printed high-impedance microstrip line (17.1, 17.2) which is formed from the material of one of the conductor layers and which (17.1, 17.2) is connected to the grounding surface (22) by at least one discrete capacitor (18.1, 18.2). - Antenna device according to claim 8, characterised in that
the matching line (15) comprises two microstrip conductors (17.1, 17.2) being connected in series and two capacitors (18.1, 18.2). - Antenna device according to claim 8, characterised in that
the microstrip conductors (17.1, 17.2) comprise meander-shaped trimming areas whose transom-shaped transversal connections are cuttable for the purpose of trimming.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH83893 | 1993-03-19 | ||
CH838/93 | 1993-03-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0616383A1 EP0616383A1 (en) | 1994-09-21 |
EP0616383B1 true EP0616383B1 (en) | 1997-12-03 |
Family
ID=4196383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94103992A Expired - Lifetime EP0616383B1 (en) | 1993-03-19 | 1994-03-15 | Antenna device for hand-held portable transceivers |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0616383B1 (en) |
AT (1) | ATE160905T1 (en) |
DE (1) | DE59404690D1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0762533A2 (en) * | 1995-08-23 | 1997-03-12 | Murata Manufacturing Co., Ltd. | Antenna apparatus |
US5709832A (en) * | 1995-06-02 | 1998-01-20 | Ericsson Inc. | Method of manufacturing a printed antenna |
US5828342A (en) * | 1995-06-02 | 1998-10-27 | Ericsson Inc. | Multiple band printed monopole antenna |
US5844525A (en) * | 1995-06-02 | 1998-12-01 | Hayes; Gerard James | Printed monopole antenna |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004228A (en) * | 1974-04-29 | 1977-01-18 | Integrated Electronics, Ltd. | Portable transmitter |
DE3302876A1 (en) * | 1983-01-28 | 1984-08-02 | Robert Bosch Gmbh, 7000 Stuttgart | DIPOLANTENNA FOR PORTABLE RADIO DEVICES |
US4736454A (en) * | 1983-09-15 | 1988-04-05 | Ball Corporation | Integrated oscillator and microstrip antenna system |
US4894663A (en) * | 1987-11-16 | 1990-01-16 | Motorola, Inc. | Ultra thin radio housing with integral antenna |
JPH04321190A (en) * | 1991-04-22 | 1992-11-11 | Mitsubishi Electric Corp | Antenna circuit and its production for non-contact type portable storage |
JP2653277B2 (en) * | 1991-06-27 | 1997-09-17 | 三菱電機株式会社 | Portable wireless communication device |
JPH0537416A (en) * | 1991-08-02 | 1993-02-12 | Matsushita Electric Ind Co Ltd | Cordless telephone set |
-
1994
- 1994-03-15 EP EP94103992A patent/EP0616383B1/en not_active Expired - Lifetime
- 1994-03-15 DE DE59404690T patent/DE59404690D1/en not_active Expired - Fee Related
- 1994-03-15 AT AT94103992T patent/ATE160905T1/en not_active IP Right Cessation
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5709832A (en) * | 1995-06-02 | 1998-01-20 | Ericsson Inc. | Method of manufacturing a printed antenna |
US5828342A (en) * | 1995-06-02 | 1998-10-27 | Ericsson Inc. | Multiple band printed monopole antenna |
US5844525A (en) * | 1995-06-02 | 1998-12-01 | Hayes; Gerard James | Printed monopole antenna |
AU708520B2 (en) * | 1995-06-02 | 1999-08-05 | Ericsson Inc. | Printed monopole antenna |
EP0762533A2 (en) * | 1995-08-23 | 1997-03-12 | Murata Manufacturing Co., Ltd. | Antenna apparatus |
EP0762533B1 (en) * | 1995-08-23 | 2004-11-24 | Murata Manufacturing Co., Ltd. | Antenna matching device |
Also Published As
Publication number | Publication date |
---|---|
ATE160905T1 (en) | 1997-12-15 |
EP0616383A1 (en) | 1994-09-21 |
DE59404690D1 (en) | 1998-01-15 |
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