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EP1229604B1 - Radio assembly with antenna - Google Patents

Radio assembly with antenna Download PDF

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Publication number
EP1229604B1
EP1229604B1 EP20020002721 EP02002721A EP1229604B1 EP 1229604 B1 EP1229604 B1 EP 1229604B1 EP 20020002721 EP20020002721 EP 20020002721 EP 02002721 A EP02002721 A EP 02002721A EP 1229604 B1 EP1229604 B1 EP 1229604B1
Authority
EP
European Patent Office
Prior art keywords
antenna
circuit board
printed circuit
radio module
spacer elements
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP20020002721
Other languages
German (de)
French (fr)
Other versions
EP1229604A2 (en
EP1229604A3 (en
Inventor
Dietmar Gapski
Reiner Hoepken
Oliver Spiess
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1229604A2 publication Critical patent/EP1229604A2/en
Publication of EP1229604A3 publication Critical patent/EP1229604A3/en
Application granted granted Critical
Publication of EP1229604B1 publication Critical patent/EP1229604B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • 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

Definitions

  • the present invention relates to a radio module, in particular for a mobile radio terminal, which comprises an easily integrable antenna.
  • the antenna and other components are arranged on a printed circuit board.
  • the space on the circuit board is limited, so that antenna and other components are often in close proximity to each other. These neighboring components negatively influence the transmission and reception properties of the antenna. So far, no satisfactory compromise has been found, the antenna simple and cheap to manufacture and integrate into the radio module, while the transmission and reception properties of the antenna of other components of the radio module are largely unaffected and also the arrangement of the components and antenna is not contrary to the miniaturization ,
  • Document DE 197 13 929 A1 discloses a radio module implemented as a transceiver which has a printed circuit board on which the components of the radio module are arranged.
  • An antenna is her first End connected to the circuit board. Its second end is spatially separated from the circuit board.
  • the antenna has connecting elements for the connection to the printed circuit board.
  • a radio antenna which has at two points with respect to a circuit board a distance betechnikstelligende spacers.
  • One of the spacers is placed at a first end of the antenna and the other is substantially spaced from a second end of the antenna.
  • the spacers are formed like a stilt.
  • the spacer element arranged at the first end of the antenna has, at the associated free end, a transverse surface aligned parallel to a printed circuit board and projecting beyond the cross-section of the stilt-like spacer element.
  • the spacers are spaced apart from one another in the manner of the antenna, that the center of gravity of the antenna is disposed in a region between the free ends of the spacers of the antenna.
  • a radio module which has an antenna connected to a printed circuit board.
  • a radio module having an antenna which comprises a printed circuit board on which components are arranged.
  • the mounted antenna is connected to the circuit board. It has at three points opposite to the circuit board on a spacing effecting spacer elements, of which a first spacer element at a first end of the antenna and two further spacer elements are placed at a second end of the antenna.
  • the first spacer element is a wall front, which is placed on the printed circuit board at the end edge.
  • the two other spacers are self-contained columnar elements positioned between the antenna and the circuit board. The wall front and the two columnar elements form a three-point support for the antenna, on which the antenna rests.
  • a radio module is known with an antenna formed from a sheet metal part which is complicated in shape.
  • the antenna has, in particular at a first and a second end fastening elements for attachment to a support plate, of which the fastening elements are formed at the first end of the antenna in such a way that they clamp the support plate between them.
  • the antenna is designed in such a way that it should be placed on support ribs of the support plate and fastened there with additional means.
  • a radio module which comprises a printed circuit board on which components are arranged, and which comprises an antenna, which is connected in the assembled state with the printed circuit board.
  • the antenna has at two locations opposite the printed circuit board a spacing effecting spacers, of which a first spacer is placed at a first end of the antenna and a second spacer is spaced substantially apart from a second end of the antenna.
  • the spacer element placed at the first end of the antenna is formed wall-like over the entire width of the antenna and is supported on the printed circuit board via an end edge.
  • the second spacer element is also formed over the entire width of the antenna and has a V-shape in profile. Due to the V-shape and the width as the antenna, the second spacer is supported by a line formation on the circuit board. For mounting the antenna, it is therefore complicated manner required to position the antenna particularly accurate, so that the narrow end edge of the first spacer element and the narrow line structure of the second spacer come to lie exactly on the associated counterparts on the circuit board.
  • the document EP 1 014 486 A1 discloses an arrangement comprising a base plate and an antenna which is supported on the base plate at a first end via a wall-like spacer element, which rests on the base plate with an end edge, and over at a second end a formed directly from the second end, formed parallel to the base plate transverse surface supported on a base plate constructed on the base.
  • the base plate extra on a complex structure in order to place the antenna on it.
  • a plate antenna is known, which is formed in a complicated manner such that it is supported at least with the profile on lateral end edges on a support plate.
  • Object of the present invention is to provide a radio module with an antenna that has good transmission and reception properties and at the same time is easy to manufacture and integrate.
  • the radio module comprises a printed circuit board on which, in addition to the antenna, further components are arranged.
  • the antenna is in this case connected to the circuit board over two areas.
  • a first end of the antenna is formed areally, which serves for example as a soldering foot.
  • the antenna is connected to the printed circuit board via a connecting element whose base also serves as a support surface.
  • the projection of the center of gravity of the antenna on the printed circuit board is in this case within the surface area, which is determined by the base of the connecting element and the areally formed first end of the antenna.
  • the advantage of this is that the antenna, if it is initially placed loosely on the circuit board, does not tilt, which is for example favorable for an automatic assembly process.
  • the sequence of such a placement process may include, for example, the following steps: The antenna is initially set automatically on the circuit board. In the area of the bearing surfaces is solder material. are all components applied to the circuit board, this is slid into a soldering oven, in which melted by a corresponding temperature, the solder material and so a permanent connection is made.
  • a development of the invention provides that the components are located on the same side of the circuit board as the base of the antenna. This is manufacturing technology advantageous because components and antenna could be fitted from the same side.
  • the first end opposite the second end of the antenna is outside the range of the circuit board.
  • this antenna end or this area of the antenna has a certain minimum distance from other components which can influence the transmission and reception properties of the antenna or can also be influenced by the antenna.
  • the shape and spatial orientation of this antenna region or end of the antenna can also be defined, for example, by the shape of the housing.
  • Metal components, to which a minimum distance is required, are for example in the earpiece of a mobile terminal.
  • An embodiment of the invention is that the antenna is conductively connected to one side of the circuit board with this, and passes through a window-like recess of the circuit board on the opposite side.
  • the opposite end of the first end of the antenna is shielded by the circuit board of other components, resulting in an improvement of the transmission and reception properties.
  • the components are naturally shielded from the antenna.
  • a development of the invention may consist in that the antenna is realized by means of a bent sheet metal.
  • the bending of the sheet can be carried out continuously or stepwise. This implementation has the advantage that minimum distances can be realized flexibly.
  • the width of the antenna is not constant over the entire length of the antenna.
  • the antenna is designed in steps.
  • a first stage can act as a soldering foot
  • a second stage which has a relatively large area, can serve as a suction surface for an automatic assembly process.
  • Further stages are adapted in their shape and area size to the spatial conditions and of course to the specified electromagnetic properties of the antenna.
  • FIG. 1 shows the radio module which comprises the antenna 1, the printed circuit board 10 and further components 12, for example an HF or DECT module. Likewise, a part of the earphone 14 is visible.
  • the antenna comprises a soldering foot 3, at which the antenna can be soldered onto the printed circuit board.
  • the antenna 1 is stepped away from the printed circuit board 10. By this stepped removal of the antenna from the printed circuit board, two surfaces are formed which extend substantially parallel to the printed circuit board. In this case, a first antenna surface 5 has a greater width than a second antenna surface 7. Between antenna 1 and printed circuit board 10 there is a connecting element 9.
  • the advantage of this exemplary embodiment is the following: For placing the antenna 1 on the printed circuit board 10, the antenna 1 is first sucked on the first antenna surface 5 by means of, for example, a pipette. Now the antenna can be moved to the desired location on the circuit board 10. After placing the antenna 1 on the circuit board 10, the antenna does not tilt, since the projection of its center of gravity 6 on the circuit board 10 is within the distance, which is determined by the connecting element 9 and the boundaries of the Lötfußes 3. Due to the limitations of the inner and outer Lötfußes two surfaces are defined, here reference is made to the larger of the two.
  • the connecting element 9 can also serve to feed the electromagnetic signal.
  • the antenna is thus soldered in the region of the soldering foot 3 and the connecting element 9 to the tinned printed circuit board 10, on which the solder is applied at the required locations.
  • a further development of the invention consists in that the planar first end of the antenna 1 or the soldering foot 3 has upwardly bent tabs 4.
  • This is advantageous for the following reasons for a permanent connection between antenna 1 and circuit board 10:
  • the antennas are usually punched out of a stainless and already tinned material.
  • the material for the tinning is later required for the preparation of the soldering contact between the antenna 1 and circuit board 10.
  • One uses already tinned sheet because the antenna, if it were tinned in the finished state, which can be done for example by a Trommelgalvanmaschine, could be damaged.
  • the tinplate is removed by punching.
  • soldering contact is required on the entire area of the soldering foot 3, not only in the center thereof. This can be achieved by the tabs 4 described above, at the bending edge is sufficient soldering material.
  • the tabs 4 on the soldering foot 3 thus fulfill the following function: In their manufacture, the antenna 1 is punched out of a non-corrosive, also already tinned sheet metal. Since the solder only flows between tinned areas during melting, a distribution of the solder that is more favorable for a stable connection is formed in the case of the folded-up tab 4.
  • the distance to the earphone 14 is increased by the stepped design of the antenna 1.
  • this earphone 14 is made visible in an enlarged detail of Figure 1 in Figure 2.
  • the earphone 14 also contains metallic elements 15.
  • FIGS. 3 a, b show an exemplary embodiment of the invention in which the antenna 1 projects through a window-like recess 11 in the printed circuit board 10.
  • the antenna 1 can be placed from the same side as the other components 12. This has an advantageous effect in an automatic assembly process.
  • the antenna 1 is largely shielded from the other components 12. Therefore, the transmission and reception properties of the antenna 1 are not significantly affected by the other components 12.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)

Description

Die vorliegende Erfindung betrifft eine Funkbaugruppe, insbesondere für ein Mobilfunk-Endgerät, welche eine leicht integrierbare Antenne umfasst.The present invention relates to a radio module, in particular for a mobile radio terminal, which comprises an easily integrable antenna.

Eine Vielzahl unterschiedlicher Antennen wird derzeit in den Funkbaugruppen von Kommunikationsgeräten verwendet, die auf unterschiedliche Anwendungen hin optimiert sind. Da mit Kommunikationsgeräten ein Massenmarkt bedient wird, müssen diese Geräte und ihre Zubehörteile einfach und kostengünstig herstellbar und zusammenbaubar sein. Bei Antennen kommt zu diesen Anforderungen noch der Wunsch nach guten Sende- und Empfangseigenschaften hinzu. Die Erfüllung dieser drei Kriterien gleichzeitig steht in gewissem Widerspruch zur stetig fortschreitenden Miniaturisierung der Kommunikationsgeräte:A variety of different antennas are currently used in the radio modules of communication devices that are optimized for different applications. Since communication devices serve a mass market, these devices and their accessories must be simple and inexpensive to manufacture and assemble. In the case of antennas, these requirements are compounded by the desire for good transmission and reception properties. The fulfillment of these three criteria is at the same time in contradiction to the steadily progressing miniaturization of the communication devices:

Normalerweise sind die Antenne und weitere Bauteile auf einer Leiterplatte angeordnet. Der Platz auf der Leiterplatte ist beschränkt, so dass sich Antenne und weitere Bauteile oft in unmittelbarer Nähe zueinander befinden. Durch diese benachbarten Bauelemente werden die Sende- und Empfangseigenschaften der Antenne negativ beeinflusst. Bisher wurde kein zufriedenstellender Kompromiss gefunden, die Antenne einfach und billig herzustellen und in die Funkbaugruppe zu integrieren, wobei gleichzeitig die Sende- und Empfangseigenschaften der Antenne von weiteren Bauelementen der Funkbaugruppe weitgehend unbeeinflusst sind und zudem die Anordnung der Bauelemente und Antenne nicht konträr zur Miniaturisierung verläuft.Normally, the antenna and other components are arranged on a printed circuit board. The space on the circuit board is limited, so that antenna and other components are often in close proximity to each other. These neighboring components negatively influence the transmission and reception properties of the antenna. So far, no satisfactory compromise has been found, the antenna simple and cheap to manufacture and integrate into the radio module, while the transmission and reception properties of the antenna of other components of the radio module are largely unaffected and also the arrangement of the components and antenna is not contrary to the miniaturization ,

Aus dem Dokument DE 197 13 929 A1 ist eine als eine Sende-Empfangs-Einrichtung realisierte Funkbaugruppe bekannt, die eine Leiterplatte aufweist, auf der die Bauelemente der Funkbaugruppe angeordnet sind. Eine Antenne ist mit ihrem ersten Ende mit der Leiterplatte verbunden. Ihr zweites Ende ist räumlich von der Leiterplatte getrennt. Die Antenne weist für die Verbindung mit der Leiterplatte Verbindungselemente auf.Document DE 197 13 929 A1 discloses a radio module implemented as a transceiver which has a printed circuit board on which the components of the radio module are arranged. An antenna is her first End connected to the circuit board. Its second end is spatially separated from the circuit board. The antenna has connecting elements for the connection to the printed circuit board.

Aus dem Dokument GB 2 323 478 A ist eine Funkantenne bekannt, die an zwei Stellen gegenüber einer Leiterplatte einen Abstand bewerkstelligende Abstandselemente aufweist. Eines der Abstandselement ist an einem ersten Ende der Antenne und das andere von einem zweiten Ende der Antenne wesentlich beabstandet platziert. Die Abstandselemente sind stelzenartig ausgebildet. Das am ersten Ende der Antenne angeordnete Abstandselement weist am zugehörigen freien Ende eine parallel zu einer Leiterplatte ausgerichtete, über den Querschnitt des stelzenartigen Abstandselements hinausragende Querfläche auf. Die Abstandselemente sind voneinander in der Weise an der Antenne beabstandet angeordnet, dass der Schwerpunkt der Antenne in einem Bereich zwischen den freien Enden der Abstandselemente der Antenne angeordnet ist.From the document GB 2 323 478 A a radio antenna is known, which has at two points with respect to a circuit board a distance bewerkstelligende spacers. One of the spacers is placed at a first end of the antenna and the other is substantially spaced from a second end of the antenna. The spacers are formed like a stilt. The spacer element arranged at the first end of the antenna has, at the associated free end, a transverse surface aligned parallel to a printed circuit board and projecting beyond the cross-section of the stilt-like spacer element. The spacers are spaced apart from one another in the manner of the antenna, that the center of gravity of the antenna is disposed in a region between the free ends of the spacers of the antenna.

Aus dem Dokument DE 198 10 749 A1 ist weiter eine Funkbaugruppe bekannt, die eine mit einer Leiterplatte verbundene Antenne aufweist.From the document DE 198 10 749 A1 a radio module is further known which has an antenna connected to a printed circuit board.

Aus dem Dokument JP 09252214 ist eine eine Antenne aufweisende Funkbaugruppe bekannt, die eine Leiterplatte umfasst, auf der Bauelemente angeordnet sind. Die montierte Antenne ist mit der Leiterplatte verbunden. Sie weist an drei Stellen gegenüber der Leiterplatte einen Abstand bewerkstelligende Abstandselemente auf, von denen ein erstes Abstandselement an einem ersten Ende der Antenne und zwei weitere Abstandselemente an einem zweiten Ende der Antenne platziert sind. Bei dem ersten Abstandselement handelt es sich um eine Wandfront, die stirnkantig auf die Leiterplatte aufgesetzt ist. Bei den beiden anderen Abstandselementen handelt es sich um eigenständige säulenartige Elemente, die zwischen der Antenne und der Leiterplatte positioniert sind. Die Wandfront und die beiden säulenartigen Elemente bilden für die Antenne eine Dreipunktauflage, auf denen die Antenne aufliegt.From the document JP 09252214 a radio module having an antenna is known which comprises a printed circuit board on which components are arranged. The mounted antenna is connected to the circuit board. It has at three points opposite to the circuit board on a spacing effecting spacer elements, of which a first spacer element at a first end of the antenna and two further spacer elements are placed at a second end of the antenna. The first spacer element is a wall front, which is placed on the printed circuit board at the end edge. The two other spacers are self-contained columnar elements positioned between the antenna and the circuit board. The wall front and the two columnar elements form a three-point support for the antenna, on which the antenna rests.

Bei der Montage der Antenne sind nicht nur die Antenne selbst zu montieren, sondern auch die beiden säulenartigen Abstandselemente.When mounting the antenna, not only the antenna itself must be mounted, but also the two columnar spacers.

Aus dem Dokument US-A-5 874 920 ist eine Funkbaugruppe mit einer aus einem Blechteil gebildeten Antenne bekannt, die kompliziert geformt ist. Die Antenne weist insbesondere an einem ersten und einem zweiten Ende Befestigungselemente für die Befestigung an einer Trägerplatte auf, von denen die Befestigungselemente an dem ersten Ende der Antenne in der Weise ausgebildet sind, dass sie die Trägerplatte zwischen sich einklemmen. Außerdem ist die Antenne in der Weise ausgebildet, dass sie auf Auflagerippen der Trägerplatte aufzulegen und dort mit zusätzlichen Mitteln zu befestigen ist.From the document US-A-5 874 920 a radio module is known with an antenna formed from a sheet metal part which is complicated in shape. The antenna has, in particular at a first and a second end fastening elements for attachment to a support plate, of which the fastening elements are formed at the first end of the antenna in such a way that they clamp the support plate between them. In addition, the antenna is designed in such a way that it should be placed on support ribs of the support plate and fastened there with additional means.

Aus dem Dokument JP 6260829 ist eine Funkbaugruppe bekannt, die eine Leiterplatte umfasst, auf welcher Bauelemente angeordnet sind, und die eine Antenne umfasst, die im abgeschlossen montierten Zustand mit der Leiterplatte verbunden ist. Die Antenne weist an zwei Stellen gegenüber der Leiterplatte einen Abstand bewerkstelligende Abstandselemente auf, von denen ein erstes Abstandselement an einem ersten Ende der Antenne und ein zweites Abstandselement von einem zweiten Ende der Antenne wesentlich beabstandet platziert ist.From the document JP 6260829 a radio module is known, which comprises a printed circuit board on which components are arranged, and which comprises an antenna, which is connected in the assembled state with the printed circuit board. The antenna has at two locations opposite the printed circuit board a spacing effecting spacers, of which a first spacer is placed at a first end of the antenna and a second spacer is spaced substantially apart from a second end of the antenna.

Das an dem ersten Ende der Antenne platzierte Abstandselement ist wandartig über die gesamte Breite der Antenne ausgebildet und stützt sich über eine Stirnkante auf der Leiterplatte ab. Das zweite Abstandselement ist ebenfalls über die gesamte Breite der Antenne ausgebildet und weist im Profil eine V-Form auf. Auf Grund der V-Form und der Breite wie die Antenne stützt sich das zweite Abstandselement über ein Liniengebilde auf der Leiterplatte ab. Zur Montage der Antenne ist es daher aufwendiger Weise erforderlich, die Antenne besonders exakt zu positionieren, damit die schmale Stirnkante des ersten Abstandselements und das schmale Liniengebilde des zweiten Abstandselements genau auf den zugehörigen Gegenstellen auf der Leiterplatte zu liegen kommen.The spacer element placed at the first end of the antenna is formed wall-like over the entire width of the antenna and is supported on the printed circuit board via an end edge. The second spacer element is also formed over the entire width of the antenna and has a V-shape in profile. Due to the V-shape and the width as the antenna, the second spacer is supported by a line formation on the circuit board. For mounting the antenna, it is therefore complicated manner required to position the antenna particularly accurate, so that the narrow end edge of the first spacer element and the narrow line structure of the second spacer come to lie exactly on the associated counterparts on the circuit board.

Aus dem Dokument EP 1 014 486 A1 ist eine Anordnung umfassend eine Grundplatte und eine Antenne bekannt, die sich an einem ersten Ende über ein wandartig ausgebildetes Abstandselement, das mit einer Stirnkante auf der Grundplatte aufliegt, an der Grundplatte abstützt und an einem zweiten Ende über eine unmittelbar aus dem zweiten Ende herausgeformte, parallel zur Grundplatte ausgebildete Querfläche auf einem auf der Grundplatte aufgebauten Sockel abstützt. Damit weist die Grundplatte extra einen aufwendigen Aufbau auf, um die Antenne darauf platzieren zu können.The document EP 1 014 486 A1 discloses an arrangement comprising a base plate and an antenna which is supported on the base plate at a first end via a wall-like spacer element, which rests on the base plate with an end edge, and over at a second end a formed directly from the second end, formed parallel to the base plate transverse surface supported on a base plate constructed on the base. Thus, the base plate extra on a complex structure in order to place the antenna on it.

Aus dem Dokument US-A-4 803 491 ist eine Plattenantenne bekannt, die in komplizierter Weise derart ausgebildet ist, dass sie sich zumindest mit dem Profil über seitliche Stirnkanten an einer Trägerplatte abstützt.From the document US-A-4 803 491 a plate antenna is known, which is formed in a complicated manner such that it is supported at least with the profile on lateral end edges on a support plate.

Aufgabe der vorliegenden Erfindung ist es, eine Funkbaugruppe mit einer Antenne anzugeben, die gute Sende- und Empfangseigenschaften besitzt und gleichzeitig leicht herstellbar und integrierbar ist.Object of the present invention is to provide a radio module with an antenna that has good transmission and reception properties and at the same time is easy to manufacture and integrate.

Diese Aufgabe wird erfindungsgemäß durch eine Funkbaugruppe mit den Merkmalen des Anspruchs 1 gelöst. Weiterbildung der Erfindung ergeben sich aus den abhängigen Ansprüchen.This object is achieved by a radio module having the features of claim 1. Development of the invention will become apparent from the dependent claims.

Erfindungsgemäß umfasst die Funkbaugruppe eine Leiterplatte, auf welcher neben der Antenne noch weitere Bauelemente angeordnet sind. Die Antenne ist hierbei mit der Leiterplatte über zwei Bereiche verbunden. Zum einen ist ein erstes Ende der Antenne flächenhaft ausgebildet, welches beispielsweise als Lötfuß dient. Zum zweiten ist die Antenne mit der Leiterplatte über ein Verbindungselement verbunden, dessen Fußpunkt ebenfalls als Auflagefläche dient. Die Projektion des Schwerpunktes der Antenne auf die Leiterplatte befindet sich hierbei innerhalb des Flächenbereichs, welcher durch den Fußpunkt des Verbindungselementes sowie dem flächenhaft ausgebildeten ersten Ende der Antenne bestimmt ist.According to the invention, the radio module comprises a printed circuit board on which, in addition to the antenna, further components are arranged. The antenna is in this case connected to the circuit board over two areas. On the one hand, a first end of the antenna is formed areally, which serves for example as a soldering foot. Secondly, the antenna is connected to the printed circuit board via a connecting element whose base also serves as a support surface. The projection of the center of gravity of the antenna on the printed circuit board is in this case within the surface area, which is determined by the base of the connecting element and the areally formed first end of the antenna.

Vorteilhaft daran ist, dass die Antenne, wenn sie zunächst lose auf die Leiterplatte aufgesetzt wird, nicht kippt, was beispielsweise günstig für einen automatischen Bestückungsprozess ist. Der Ablauf eines derartigen Bestückungsprozess kann beispielsweise folgende Schritte umfassen: Die Antenne wird zunächst automatisch auf die Leiterplatte gesetzt. Im Bereich der Auflageflächen befindet sich Lötmaterial. Sind alle Bauelemente auf die Leiterplatte aufgebracht, wird diese in einen Lötofen geschleust, in dem durch eine entsprechende Temperatur das Lötmaterial aufgeschmolzen und so eine dauerhafte Verbindung hergestellt wird.The advantage of this is that the antenna, if it is initially placed loosely on the circuit board, does not tilt, which is for example favorable for an automatic assembly process. The sequence of such a placement process may include, for example, the following steps: The antenna is initially set automatically on the circuit board. In the area of the bearing surfaces is solder material. are all components applied to the circuit board, this is slid into a soldering oven, in which melted by a corresponding temperature, the solder material and so a permanent connection is made.

Eine Weiterbildung der Erfindung sieht vor, dass sich die Bauelemente auf derselben Seite der Leiterplatte wie der Fußpunkt der Antenne befinden. Dies ist herstellungstechnisch von Vorteil, da Bauteile und Antenne von derselben Seite her bestückt werden könnten.A development of the invention provides that the components are located on the same side of the circuit board as the base of the antenna. This is manufacturing technology advantageous because components and antenna could be fitted from the same side.

Eine andere Weiterbildung der Erfindung besteht darin, dass sich das dem ersten Ende entgegengesetzte zweite Ende der Antenne außerhalb des Bereichs der Leiterplatte befindet. Dadurch hat dieses Antennenende oder dieser Bereich der Antenne einen gewissen Mindestabstand zu weiteren Bauteilen, welche die Sende- und Empfangseigenschaften der Antenne beeinflussen können oder auch durch die Antenne beeinflusst werden. Die Form und räumliche Ausrichtung dieses Antennenbereichs oder Ende der Antenne kann aber auch beispielsweise durch die Gehäuseform definiert werden.
Metallbauteile, zu denen eine Mindestdistanz erforderlich ist, befinden sich beispielsweise in der Hörkapsel eines Mobilfunk-Endgerätes.Another development of the invention is that the first end opposite the second end of the antenna is outside the range of the circuit board. As a result, this antenna end or this area of the antenna has a certain minimum distance from other components which can influence the transmission and reception properties of the antenna or can also be influenced by the antenna. However, the shape and spatial orientation of this antenna region or end of the antenna can also be defined, for example, by the shape of the housing.
Metal components, to which a minimum distance is required, are for example in the earpiece of a mobile terminal.

Eine Ausführungsvariante der Erfindung besteht darin, dass die Antenne auf einer Seite der Leiterplatte mit dieser leitend verbunden ist, und durch eine fensterartige Ausnehmung der Leiterplatte auf die gegenüberliegende Seite hinüberreicht. Damit ist das dem ersten Ende entgegengesetzte zweite Ende der Antenne durch die Leiterplatte von weiteren Bauelementen abgeschirmt, wodurch sich eine Verbesserung der Sende- und Empfangseigenschaften ergibt. Ebenso sind auf diesem Wege die Bauelemente natürlich gegenüber der Antenne abgeschirmt.An embodiment of the invention is that the antenna is conductively connected to one side of the circuit board with this, and passes through a window-like recess of the circuit board on the opposite side. Thus, the opposite end of the first end of the antenna is shielded by the circuit board of other components, resulting in an improvement of the transmission and reception properties. Likewise, in this way, the components are naturally shielded from the antenna.

Eine Weiterbildung der Erfindung kann darin bestehen, dass die Antenne mittels eines gebogenen Blechs realisiert wird.A development of the invention may consist in that the antenna is realized by means of a bent sheet metal.

Die Biegung des Blechs kann hierbei kontinuierlich oder stufenartig erfolgen. Diese Umsetzung weist den Vorteil auf, dass Mindestabstände flexibel realisiert werden können.The bending of the sheet can be carried out continuously or stepwise. This implementation has the advantage that minimum distances can be realized flexibly.

Eine andere Weiterbildung der Erfindung besteht darin, dass die Breite der Antenne nicht über die gesamte Länge der Antenne konstant ist. Insbesondere besteht eine vorteilhafte Weiterbildung darin, dass die Antenne stufenförmig ausgebildet ist. Eine erste Stufe kann hierbei als Lötfuß fungieren, eine zweite Stufe, welche eine verhältnismäßig große Fläche aufweist, kann als Ansaugfläche für einen automatischen Bestückungsprozess dienen. Weitere Stufen sind in ihrer Form und Flächengröße den räumlichen Gegebenheiten und natürlich auch den spezifizierten elektromagnetischen Eigenschaften der Antenne angepasst.Another development of the invention is that the width of the antenna is not constant over the entire length of the antenna. In particular, there is an advantageous development in that the antenna is designed in steps. A first stage can act as a soldering foot, a second stage, which has a relatively large area, can serve as a suction surface for an automatic assembly process. Further stages are adapted in their shape and area size to the spatial conditions and of course to the specified electromagnetic properties of the antenna.

Im folgenden wird die Erfindung und ihre Weiterbildungen anhand von in Figuren gezeigten Ausführungsbeispielen erklärt.In the following the invention and its developments will be explained with reference to exemplary embodiments shown in FIGS.

Es zeigen

Figur 1
eine perspektivische Darstellung der Funkbaugruppe,
Figur 2
eine Detailvergrößerung von Figur 1, wobei der Blick auf Bauteile freigegeben wird, die teilweise durch die Leiterplatte verdeckt sind,
Figur 3a
eine Seitenansicht einer durch die Leiterplatte ragenden Antenne und
Figur 3b
eine perspektivische Darstellung der Funkbaugruppe mit einer durch die Leiterplatte ragenden Antenne.
Show it
FIG. 1
a perspective view of the radio module,
FIG. 2
1 shows an enlarged view of parts which are partially covered by the printed circuit board,
FIG. 3a
a side view of a protruding through the circuit board antenna and
FIG. 3b
a perspective view of the radio module with a projecting through the circuit board antenna.

Figur 1 zeigt die Funkbaugruppe, welche die Antenne 1, die Leiterplatte 10 und weitere Bauelemente 12, beispielsweise ein HF- oder DECT-Modul, umfasst. Ebenso ist ein Teil der Hörkapsel 14 sichtbar. Die Antenne umfasst einen Lötfuß 3, an dem die Antenne auf die Leiterplatte gelötet werden kann. Die Antenne 1 entfernt sich stufenförmig von der Leiterplatte 10. Durch dieses stufenförmige Entfernen der Antenne von der Leiterplatte werden zwei Flächen ausgebildet, die im Wesentlichen parallel zu der Leiterplatte verlaufen. Hierbei weist eine erste Antennenfläche 5 eine größere Breite auf als eine zweite Antennenfläche 7. Zwischen Antenne 1 und Leiterplatte 10 befindet sich ein Verbindungselement 9.FIG. 1 shows the radio module which comprises the antenna 1, the printed circuit board 10 and further components 12, for example an HF or DECT module. Likewise, a part of the earphone 14 is visible. The antenna comprises a soldering foot 3, at which the antenna can be soldered onto the printed circuit board. The antenna 1 is stepped away from the printed circuit board 10. By this stepped removal of the antenna from the printed circuit board, two surfaces are formed which extend substantially parallel to the printed circuit board. In this case, a first antenna surface 5 has a greater width than a second antenna surface 7. Between antenna 1 and printed circuit board 10 there is a connecting element 9.

Vorteilig an dieser beispielhaften Ausführung ist folgendes: Zum Aufsetzen der Antenne 1 auf die Leiterplatte 10 wird die Antenne 1 zunächst an der ersten Antennenfläche 5 mittels beispielsweise einer Pipette angesaugt. Nun kann die Antenne zur gewünschten Stelle auf der Leiterplatte 10 bewegt werden. Nach dem Aufsetzen der Antenne 1 auf die Leiterplatte 10 kippt die Antenne nicht, da die Projektion ihres Schwerpunktes 6 auf die Leiterplatte 10 innerhalb des Abstandes liegt, der durch das Verbindungselement 9 und die Begrenzungen des Lötfußes 3 bestimmt wird. Aufgrund der Begrenzungen des inneren und äußeren Lötfußes werden zwei Flächen definiert, hier wird auf die größere der beiden Bezug genommen. Das Verbindungselement 9 kann auch zur Einspeisung des elektromagnetischen Signals dienen.The advantage of this exemplary embodiment is the following: For placing the antenna 1 on the printed circuit board 10, the antenna 1 is first sucked on the first antenna surface 5 by means of, for example, a pipette. Now the antenna can be moved to the desired location on the circuit board 10. After placing the antenna 1 on the circuit board 10, the antenna does not tilt, since the projection of its center of gravity 6 on the circuit board 10 is within the distance, which is determined by the connecting element 9 and the boundaries of the Lötfußes 3. Due to the limitations of the inner and outer Lötfußes two surfaces are defined, here reference is made to the larger of the two. The connecting element 9 can also serve to feed the electromagnetic signal.

Die Antenne wird also im Bereich des Lötfußes 3 und des Verbindungselements 9 auf die verzinnte Leiterplatte 10, auf welcher das Lot an den erforderlichen Stellen aufgebracht ist, angelötet.The antenna is thus soldered in the region of the soldering foot 3 and the connecting element 9 to the tinned printed circuit board 10, on which the solder is applied at the required locations.

Eine Weiterbildung der Erfindung besteht darin, dass das flächenhafte erste Ende der Antenne 1 bzw. der Lötfuß 3 nach oben gebogene Laschen 4 aufweist. Dies ist aus folgenden Gründen vorteilhaft für eine dauerhafte Verbindung zwischen Antenne 1 und Leiterplatte 10: Bei ihrer Herstellung werden die Antennen zumeist aus einem rostfreien und bereits verzinnten Material ausgestanzt. Das Material für die Verzinnung wird später für die Herstellung des Lötkontaktes zwischen Antenne 1 und Leiterplatte 10 benötigt. Man verwendet bereits verzinntes Blech deswegen, da die Antenne, wenn sie in fertigem Zustand verzinnt würde, was beispielsweise durch eine Trommelgalvanisierung geschehen kann, beschädigt werden könnte. An den Rändern der Antenne 1 wird jedoch das Verzinnmaterial durch das Ausstanzen entfernt. Für einen zufriedenstellenden Kontakt zwischen Antenne 1 und Leiterplatte 10 ist jedoch ein Lötkontakt auf dem gesamten Bereich des Lötfußes 3 erforderlich, und nicht nur in dessen Mitte. Dies kann durch die oben beschriebenen Laschen 4 erreicht werden, an deren Biegekante sich ausreichend Lötmaterial befindet.A further development of the invention consists in that the planar first end of the antenna 1 or the soldering foot 3 has upwardly bent tabs 4. This is advantageous for the following reasons for a permanent connection between antenna 1 and circuit board 10: In their manufacture, the antennas are usually punched out of a stainless and already tinned material. The material for the tinning is later required for the preparation of the soldering contact between the antenna 1 and circuit board 10. One uses already tinned sheet because the antenna, if it were tinned in the finished state, which can be done for example by a Trommelgalvanisierung, could be damaged. At the edges of the antenna 1, however, the tinplate is removed by punching. However, for a satisfactory contact between the antenna 1 and the circuit board 10, a soldering contact is required on the entire area of the soldering foot 3, not only in the center thereof. This can be achieved by the tabs 4 described above, at the bending edge is sufficient soldering material.

Die Laschen 4 am Lötfuß 3 erfüllen somit folgende Funktion: Bei ihrer Herstellung wird die Antenne 1 aus einem nicht korrodierenden, ebenfalls bereits verzinnten Blech herausgestanzt. Da das Lot beim Aufschmelzen nur zwischen verzinnten Bereichen fließt, bildet sich im Fall der hochgeklappten Lasche 4 eine für eine stabile Verbindung günstigere Verteilung des Lots aus.The tabs 4 on the soldering foot 3 thus fulfill the following function: In their manufacture, the antenna 1 is punched out of a non-corrosive, also already tinned sheet metal. Since the solder only flows between tinned areas during melting, a distribution of the solder that is more favorable for a stable connection is formed in the case of the folded-up tab 4.

Um die Sende- und Empfangseigenschaften der Antenne 1 möglichst wenig zu beeinflussen, ist ein Mindestabstand zu manchen Bauelementen erforderlich. So wird beispielsweise durch die stufenförmige Ausführung der Antenne 1 der Abstand zur Hörkapsel 14 vergrößert.In order to influence the transmission and reception properties of the antenna 1 as little as possible, a minimum distance to some components is required. Thus, for example, the distance to the earphone 14 is increased by the stepped design of the antenna 1.

Die Lage dieser Hörkapsel 14 ist in einer Ausschnittsvergrößerung von Figur 1 in Figur 2 sichtbar gemacht. Die Hörkapsel 14 enthält auch metallische Elemente 15.The position of this earphone 14 is made visible in an enlarged detail of Figure 1 in Figure 2. The earphone 14 also contains metallic elements 15.

Figuren 3a, b zeigen eine beispielhafte Ausführung der Erfindung, bei der die Antenne 1 durch eine fensterartige Ausnehmung 11 in der Leiterplatte 10 ragt. Die Antenne 1 kann von derselben Seite her aufgesetzt werden wie die übrigen Bauelemente 12. Dies wirkt sich vorteilhaft bei einem automatischen Bestückungsvorgang aus. Durch die Leiterplatte 10 ist die Antenne 1 weitgehend von den weiteren Bauelementen 12 abgeschirmt. Deshalb werden die Sende- und Empfangseigenschaften der Antenne 1 durch die weiteren Bauelemente 12 nicht wesentlich beeinflusst.FIGS. 3 a, b show an exemplary embodiment of the invention in which the antenna 1 projects through a window-like recess 11 in the printed circuit board 10. The antenna 1 can be placed from the same side as the other components 12. This has an advantageous effect in an automatic assembly process. By the circuit board 10, the antenna 1 is largely shielded from the other components 12. Therefore, the transmission and reception properties of the antenna 1 are not significantly affected by the other components 12.

Claims (5)

  1. Radio module, comprising a printed circuit board (10), on which are arranged components {12), and comprising an antenna (1) which when assembly has been completed is connected to the printed circuit board (10) and which has spacer elements (for example 9) creating a gap at two positions with respect to the printed circuit board (10), of which a first spacer element is placed at a first end of the antenna and a second spacer element (9) is placed at a considerable distance from a second end of the antenna, and both of which spacer elements (for example 9) have a stilt-like form and at the corresponding free end in each case have a transverse plane (for example 3) projecting beyond the cross-section of the stilt-like spacer element (for example 9) and aligned parallel to the printed circuit board (10), by way of which the antenna (1) is held loosely in a first assembly step by the printed circuit board (10) and in a second assembly step is connected in an electrically conducting manner with the printed circuit board (10), and that the spacer elements (for example 9) are arranged spaced from one another on the antenna (1) such that the centre of gravity (6) of the antenna (1) is located in an area between the transverse planes of the free ends of the spacer elements (for example 9) such that during assembly the antenna (1) is held without tipping in the first assembly step by the printed circuit board (10) such that the spacer elements (for example 9) with the antenna (1) arranged on them are arranged to be projecting through a recess (11) formed in the printed circuit board (10) such that the antenna (1) can be passed through the cutout (11).
  2. Radio module according to claim 1, characterised in that the transverse planes (for example 3) of the spacer elements (for example 9) of the antenna (1) are arranged on the side containing the components (12) of the printed circuit board (10).
  3. Radio module according to claim 1 or 2, characterised in that the second end of the antenna (1) is arranged to project beyond the printed circuit board (10).
  4. Radio module according to one of the preceding claims, characterised in that the shape of the antenna (1) encompasses multiple planes.
  5. Radio module according to one of the preceding claims, characterised in that the form of the antenna (1) narrows in respect of its width from the first end towards the second end.
EP20020002721 2001-02-06 2002-02-06 Radio assembly with antenna Expired - Lifetime EP1229604B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10105254 2001-02-06
DE2001105254 DE10105254C2 (en) 2001-02-06 2001-02-06 Radio module with antenna

Publications (3)

Publication Number Publication Date
EP1229604A2 EP1229604A2 (en) 2002-08-07
EP1229604A3 EP1229604A3 (en) 2004-01-28
EP1229604B1 true EP1229604B1 (en) 2006-06-21

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Application Number Title Priority Date Filing Date
EP20020002721 Expired - Lifetime EP1229604B1 (en) 2001-02-06 2002-02-06 Radio assembly with antenna

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EP (1) EP1229604B1 (en)
DE (2) DE10105254C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259839A1 (en) * 2002-12-19 2005-03-03 Siemens Ag Mobile communication antenna e.g. for mobile phone, arranged as plate on sheet metal surface which has active components which make up antenna
DE102004041014B3 (en) * 2004-08-24 2006-01-19 Siemens Ag Antenna for cordless mobile electronic equipment consists of metal band bent into U-shape with sharp corners and unequal-length sides with smaller side connected to substrate
DE102007009742B4 (en) 2007-02-28 2010-11-04 Gigaset Communications Gmbh antenna device
AT526495A2 (en) 2022-08-25 2024-03-15 Siemens Mobility Austria Gmbh Electronic device and method for signal transmission

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Publication number Priority date Publication date Assignee Title
JPS62262502A (en) * 1986-05-09 1987-11-14 Yuniden Kk Antenna for radio communication equipment
JPH06260829A (en) * 1993-03-05 1994-09-16 Nissan Motor Co Ltd Inverted F type antenna
FR2718292B1 (en) * 1994-04-01 1996-06-28 Christian Sabatier Antenna for transmitting and / or receiving electromagnetic signals, in particular microwave frequencies, and device using such an antenna.
JP3664792B2 (en) * 1996-01-26 2005-06-29 富士通株式会社 Portable radio
JPH09252214A (en) * 1996-03-15 1997-09-22 Kokusai Electric Co Ltd Inverted F antenna
TW320813B (en) * 1996-04-05 1997-11-21 Omron Tateisi Electronics Co
EP0806810A3 (en) * 1996-05-07 1998-04-08 Ascom Tech Ag Antenna formed of a strip-like resonance element over a base plate
DE19810749A1 (en) * 1998-03-12 1999-09-16 Philips Patentverwaltung Radio set for use as terminal in mobile radio systems
JP2908432B1 (en) * 1998-06-03 1999-06-21 埼玉日本電気株式会社 Built-in antenna of mobile phone
JP2000059131A (en) * 1998-08-07 2000-02-25 Mitsumi Electric Co Ltd Antenna device
EP1014486A1 (en) * 1998-12-23 2000-06-28 Sony International (Europe) GmbH Patch antenna

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DE10105254C2 (en) 2003-01-09
EP1229604A2 (en) 2002-08-07
DE50207238D1 (en) 2006-08-03
DE10105254A1 (en) 2002-08-29
EP1229604A3 (en) 2004-01-28

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