EP0107676A1 - Antenna circuit for miniature radio receiver. - Google Patents

Antenna circuit for miniature radio receiver.

Info

Publication number
EP0107676A1
EP0107676A1 EP83901197A EP83901197A EP0107676A1 EP 0107676 A1 EP0107676 A1 EP 0107676A1 EP 83901197 A EP83901197 A EP 83901197A EP 83901197 A EP83901197 A EP 83901197A EP 0107676 A1 EP0107676 A1 EP 0107676A1
Authority
EP
European Patent Office
Prior art keywords
radio receiver
antenna
circuit board
receiver according
dipole
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.)
Granted
Application number
EP83901197A
Other languages
German (de)
French (fr)
Other versions
EP0107676B1 (en
Inventor
Manfred Schwanitz
Dietrich Gartner
Wolfgang Dressler
Jorg Schenk
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.)
Alcatel Lucent Deutschland AG
Alcatel Lucent NV
Original Assignee
Standard Elektrik Lorenz AG
International Standard Electric 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 Standard Elektrik Lorenz AG, International Standard Electric Corp filed Critical Standard Elektrik Lorenz AG
Publication of EP0107676A1 publication Critical patent/EP0107676A1/en
Application granted granted Critical
Publication of EP0107676B1 publication Critical patent/EP0107676B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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 a miniaturized mobile radio receiver according to the preamble of claim 1.
  • Such a miniaturized mobile radio receiver is known from DE-GM 67 52 498.
  • the radio receiver described there has two antenna wires to form an elongated dipole, which run within a housing formed from two plastic shells.
  • the shells are held together on their narrow sides by two caps, which are electrically conductive and are connected to the ends of the antennas as capacitive loads.
  • Conductor tracks of a printed circuit board in the housing which run in the vicinity of the antenna wires, are strongly coupled to them and conductor tracks which extend from one to the other dipole half represent an ohmic-capacitive shunt of the antenna. This increases the loss resistance and the antenna replacement capacity.
  • the invention has for its object to provide an improved miniaturized mobile radio receiver. This object is achieved with the means specified in claim 1. Embodiments of the invention can be found in the subclaims.
  • a television antenna is known. This consists of a housing in which a half-wave dipole, the elements of which consist of foils on a card, and a preamplifier are located as the antenna. A coaxial cable is connected to the base of the antenna and leads to the preamplifier. Apart from the foils, the plate does not have any circuit traces.
  • the decrease in the effective height and the efficiency of the antenna through the surrounding conductor tracks is so greatly reduced that very good sensitivity is achieved with the radio receiver.
  • FIG. 1 is a very simplified representation of the antenna and its equivalent circuit.
  • Fig. 2 is an equivalent circuit diagram of the antenna at a separation of the conductor tracks for RF signals
  • Fig. 3 is a perspective view of circuit boards with an antenna.
  • a circuit board 1 is shown, in which also the better overview because of conductor tracks and Components are not shown.
  • wires 2 are arranged which form a stretched dipole of an antenna.
  • capacitive loads are applied in the form of metallic surfaces.
  • capacitances C S form, two of which are shown symbolically and the value of which, among other things, was from the wires 2 depends on the conductor tracks. If conductor tracks extend from one dipole half to the other, the capacitances also act from one dipole half to the other
  • the equivalent circuit diagram of the antenna is shown in FIG. 1c). It consists of a generator with the open circuit voltage U O in series with a loss resistance R A and an antenna capacitance C A. In parallel with this are the capacitances C S , combined into a single one, and a resistor R S. This results in a capacitive voltage division for the connected consumer (not shown), which greatly reduces the voltage to be output by the antenna, and there is a loss due to the ohmic component according to the resistance R S.
  • the entire conductor tracks of the circuit board 1 for high-frequency signals (HF) are separated in the base region of the dipole.
  • This Separation acting only for HF signals is indicated in FIG. 1a) by the dashed line 4.
  • resistances R of about 100 kohm are switched on at this point, and resonance resonant circuits are switched on in conductor tracks that connect low-resistance sources and loads.
  • the resistors must have low-capacitance and low-inductance designs.
  • FIG. 2 again shows the equivalent circuit diagram of the antenna, a high-resistance resistor R and a resonant circuit having the frequency F 0 now being present in the branch of the capacitance C S and the resistor R S.
  • the frequency F 0 of the resonance oscillation travel is selected so that it approximately corresponds to the frequency of the signal to be received.
  • all resonant circuits of the low-eared conductor tracks crossing line 4 can be combined.
  • the wires of the resonant circuits are twisted together and wound on a coil body in a ferrite shell core.
  • the number of Win applications is chosen so that the frequency F 0 is reached.
  • the wires 2 of the antenna run on the longer edge of the printed circuit board 1.
  • Some radio receivers have two printed circuit boards 1 and 5, of which the printed circuit board 5 is smaller than the printed circuit board 1, for example.
  • the circuit boards 1 and 5 are shown in perspective in FIG. 3.
  • the wire 2 of the one dipole half runs on the edge of the circuit board 1 and the wire 2 of the other dipole half runs on the edge of the circuit board 5.
  • the base point of the antenna can be arranged on one or the other circuit board. In Fig. 3 it is attached to the circuit board 5.
  • At the bottom of the circuit board 1 there is a sheet 6 and the wire 2 of the lower dipole half is connected to this sheet 6 and thus acts as a capacitive load on the antenna.
  • a sheet 7 is attached to the upper edge, which is connected to a metallized surface 8 on the circuit board 5. With the plate 7 and the surface 8, the end of the wire 2 of the upper dipole half is connected, so that a capacitive load on the antenna arises. Arrangements are also only possible with sheet metal or metallic surfaces or a combination other than the one shown as a capacitive load.
  • the circuit board 1 has now been used for the separation of the HF signals for all conductor tracks exceeding this area.
  • resonance resonant circuits with the frequency F O are inserted into the high-resistance conductor tracks, resistors R (only one resistor shown) with a low-capacitance and low inductance design, and into the low-resistance conductor tracks.
  • the resonant resonant circuits can all be arranged in a shell core.

Abstract

Le récepteur radio miniaturisé, mobile, présente comme antenne un dipôle allongé. Les fils d'antenne s'étendent le long du bord d'une ou plusieurs plaquettes de circuits imprimés du récepteur et sont reliés, à leur extrémité, à des surfaces conductrices. Les pistes conductrices de la ou des plaquettes, qui s'étendent parallèlement à l'antenne forment une dérivation ohmique-capacitive et sont donc, pour les signaux HF, découplées aux alentours de la base de l'antenne.The mobile miniature radio receiver has an elongated dipole as an antenna. The antenna wires extend along the edge of one or more receiver circuit boards and are connected at their ends to conductive surfaces. The conductive tracks of the wafer (s), which extend parallel to the antenna form an ohmic-capacitive bypass and are therefore, for HF signals, decoupled around the base of the antenna.

Description

Antennenschaltung für miniaturisierten FunkempfängerAntenna circuit for miniaturized radio receivers
Die Erfindung bezieht sich auf einen miniaturisierten mobilen Funkempfänger gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a miniaturized mobile radio receiver according to the preamble of claim 1.
Ein derartiger miniaturisierter mobiler Funkempfänger ist aus dem DE-GM 67 52 498 bekannt. Der dort beschriebene Funk empfänger weist zur Bildung eines gestreckten Dipoles zwei Antennendrähte auf, die innerhalb eines aus zwei Kunststoffschalen gebildeten Gehäuses verlaufen. Die Schalen den an ihren Schmalseiten von zwei Kappen zusammengehalten, die elektrisch leitend sind und mit den Enden der Antennen drähte als kpazitive Belastung verbunden werden.Such a miniaturized mobile radio receiver is known from DE-GM 67 52 498. The radio receiver described there has two antenna wires to form an elongated dipole, which run within a housing formed from two plastic shells. The shells are held together on their narrow sides by two caps, which are electrically conductive and are connected to the ends of the antennas as capacitive loads.
In der Nähe der Antennendrähte verlaufende Leiterbahnen einer Leiterplatte im Gehäuse sind mit diesen stark verkoppelt und Leiterbahnen, die von einer bis zur anderen Dipolhälfte reichen, stellen einen ohmsch-kapazitiven Nebenschluß der Antenne dar. Hierdurch steigt der Verlustwiderstand und die Antennen ersatz kapazität an.Conductor tracks of a printed circuit board in the housing, which run in the vicinity of the antenna wires, are strongly coupled to them and conductor tracks which extend from one to the other dipole half represent an ohmic-capacitive shunt of the antenna. This increases the loss resistance and the antenna replacement capacity.
Der Erfindung liegt die Aufgabe zugrunde, einen verbesserten miniaturisierten mobilen Funkempfänger anzugeben. Die Lösung dieser Aufgabe erfolgt mit den im Anspruch 1 angegebenen Mitteln. Ausgestaltungen der Erfindung können den Unteransprüchen entnommen werden.The invention has for its object to provide an improved miniaturized mobile radio receiver. This object is achieved with the means specified in claim 1. Embodiments of the invention can be found in the subclaims.
Aus der GB-PS 20 29 112 ist eine Fernsehantenne bekannt. Diese besteht aus einem Gehäuse, in dem sich als Antenne ein HaIbwellendipol, dessen Elemente aus Folien auf einer Karte bestehen, sowie ein Vorverstärker befindet. Am Fußpunkt der Antenne ist ein Koaxialkabel angeschlossen, das zum Vorverstärker führt. Die Platte trägt außer den Folien keine Leiterbahnen einer Schaltung.From GB-PS 20 29 112 a television antenna is known. This consists of a housing in which a half-wave dipole, the elements of which consist of foils on a card, and a preamplifier are located as the antenna. A coaxial cable is connected to the base of the antenna and leads to the preamplifier. Apart from the foils, the plate does not have any circuit traces.
Bei dem erfindungsgemäßen miniaturisierten Funkempfänger ist die Abnahme der effektiven Höhe und des Wirkungsgrades der Antenne durch die umgebenden Leiterbahnen so stark verringeri daß mit dem Funkempfänger eine sehr gute Empfindlichkeit erzielt wird.In the miniaturized radio receiver according to the invention, the decrease in the effective height and the efficiency of the antenna through the surrounding conductor tracks is so greatly reduced that very good sensitivity is achieved with the radio receiver.
Die Erfindung wird nun anhand von Zeichnungen eines Ausführungsbeispieles näher erläutert. Es zeigen:The invention will now be explained in more detail with reference to drawings of an embodiment. Show it:
Fig. 1 eine sehr vereinfachte Darstellung der Antenne und ihr Ersatzschaltbild;Figure 1 is a very simplified representation of the antenna and its equivalent circuit.
Fig. 2 ein Ersatzschaltbild der Antenne bei einer Auf trennung der Leiterbahnen für HF-Signale undFig. 2 is an equivalent circuit diagram of the antenna at a separation of the conductor tracks for RF signals and
Fig. 3 eine perspektivische Ansicht von Leiterplatten mit einer Antenne.Fig. 3 is a perspective view of circuit boards with an antenna.
In Fig. 1a) ist von einem nicht dargestellten miniaturisierten mobilen Funkempfänger eine Leiterplatte 1 dargestellt, bei der auch der besseren Übersicht wegen Leiterbahnen und Bauteile nicht eingezeichnet sind. Längs des Randes der Leiterplatte 1 sind Drähte 2 angeordnet, die einen gestreck ten Dipol einer Antenne bilden. An den nach außen weisenden freien Enden der Drähte sind in Form von metallischen Flächen 3 kapazitive Belastungen angebracht. Zwischen den Drähten und den Flächen auf der einen Seite und den Leiter bahnen der Schaltung auf der Leiterplatte 1 auf der anderen Seite bilden sich Kapazitäten CS aus, von denen zwei symbo lisch dargestellt sind und deren Wert unter anderem vom Ab stand der Drähte 2 von den Leiterbahnen abhängt. Wenn Leiterbahnen von einer Dipolhälfte zur anderen reichen, dann wirken die Kapazitäten auch von der einen Dipolhälfte auf die andereIn Fig. 1a) of a miniaturized mobile radio receiver, not shown, a circuit board 1 is shown, in which also the better overview because of conductor tracks and Components are not shown. Along the edge of the circuit board 1, wires 2 are arranged which form a stretched dipole of an antenna. On the free ends of the wires pointing outwards, 3 capacitive loads are applied in the form of metallic surfaces. Between the wires and the surfaces on one side and the conductors of the circuit on the circuit board 1 on the other side, capacitances C S form, two of which are shown symbolically and the value of which, among other things, was from the wires 2 depends on the conductor tracks. If conductor tracks extend from one dipole half to the other, the capacitances also act from one dipole half to the other
In Fig. 1b) ist der Einfluß der Kapzitäten CS auf die Ant dargestellt. Die Kapazitäten CS wirken über den Fußpunktbereich der Antenne hinweg und stellen dadurch einen ohmschkapazitiven Nebenschluß dar. Hierdurch steigt der Verlustwiderstand und die Antennenersatzkapazität der Antenne stark an.1b) shows the influence of the capacitances C S on the Ant. The capacitances C S act across the base area of the antenna and thus represent an ohmic capacitive shunt. As a result, the loss resistance and the antenna replacement capacity of the antenna increase sharply.
In Fig. 1c) ist das Ersatzschaltbild der Antenne dargestellt. Es besteht aus einem Generator mit der Leerlaufspannung UO in Reihe mit einem Verlustwiderstand RA und einer Antennenkapazität CA . Hierzu parallel liegen die Kapazitäten CS, zu einer einzigen zusammengefaßt sind, und ein Widerstand RS. Dadurch entsteht für den angeschalteten Verbraucher (nicht dargestellt) eine kapazitive Spannungsteilung, die die abzugebende Spannung der Antenne stark herabsetzt und es ergibt sich durch den ohmschen Anteil gemäß dem Widerstand RS ein Verlust.The equivalent circuit diagram of the antenna is shown in FIG. 1c). It consists of a generator with the open circuit voltage U O in series with a loss resistance R A and an antenna capacitance C A. In parallel with this are the capacitances C S , combined into a single one, and a resistor R S. This results in a capacitive voltage division for the connected consumer (not shown), which greatly reduces the voltage to be output by the antenna, and there is a loss due to the ohmic component according to the resistance R S.
Zur Vermeidung des ohmsch-kapazitiven Nebenschlusses werden im Fußpunktbereich des Dipols de gesamten Leiterbahnen der Leiterplatte 1 für hochfrequente Signale (HF) aufgetrennt. Diese nur für HF-Signale wirkende Auftrennung ist in Fig. 1a) durch die gestrichelte Linie 4 angedeutet. In Leiterbahnen, die die Linie 4 überschreiten und die hochohmige Quellen und Lasten verbinden, sind an dieser Stelle Widerstände R von etwa 100 kohm eingeschaltet und in Leiterbahnen, die niederohmige Quellen und Lasten verbinden, sind Resonanzschwingkreise eingeschaltet. Die Widerstände müssen kapazitäts- und induktivitätsarme Bauformen aufweisen.To avoid the ohmic-capacitive shunt, the entire conductor tracks of the circuit board 1 for high-frequency signals (HF) are separated in the base region of the dipole. This Separation acting only for HF signals is indicated in FIG. 1a) by the dashed line 4. In conductor tracks that cross line 4 and connect the high-resistance sources and loads, resistances R of about 100 kohm are switched on at this point, and resonance resonant circuits are switched on in conductor tracks that connect low-resistance sources and loads. The resistors must have low-capacitance and low-inductance designs.
In Fig. 2 ist wieder das Ersatzschaltbild der Antenne dargestellt, wobei nunmehr im Zweig der Kapazität CS und des Widerstandes RS ein hochohmiger Widerstand R und ein Resonanzschwingkreis mit der Frequenz F0 vorhanden sind. Hierdurch kann jetzt fast die gesamte Ant ennen Spannung an den nicht dargestellten Verbraucher gelangen. Die Frequenz F0 der Resonanz schwingk reise ist so gewählt, daß sie etwa mit der Frequenz des zu empfangenden Signales übereinstimmt.2 again shows the equivalent circuit diagram of the antenna, a high-resistance resistor R and a resonant circuit having the frequency F 0 now being present in the branch of the capacitance C S and the resistor R S. As a result, almost the entire antenna voltage can reach the consumer, not shown. The frequency F 0 of the resonance oscillation travel is selected so that it approximately corresponds to the frequency of the signal to be received.
Damit man als Bauteil nur einen Resonanzschwingkreis erhält, können alle Resonanzschwingkreise der die Linie 4 überschreitenden niederohrnigen Leiterbahnen zusammengefaßt werden. Hierzu werden die Drähte der Resonanzschwingkreise miteinander stark verdrillt und auf einen Spulenkörper in einen Schalenkern aus Ferrit gewickelt. Die Anzahl der Win dungen wird so gewählt, daß die Frequenz F0 erreicht wird.So that only one resonant circuit is obtained as a component, all resonant circuits of the low-eared conductor tracks crossing line 4 can be combined. For this purpose, the wires of the resonant circuits are twisted together and wound on a coil body in a ferrite shell core. The number of Win applications is chosen so that the frequency F 0 is reached.
Bei Funkempfängern mit einer Leiterplatte verlaufen die Drähte 2 der Antenne am längeren Rand der Leiterplatte 1. Manche Funkempfänger weisen zwei Leiterplatten 1 und 5 auf, von denen die Leiterplatte 5 beispielsweise kleiner als die Leiterplatte 1 ist. Die Leiterplatten 1 und 5 sind in Fig. 3 perspektivisch dargestellt. Der Draht 2 der einen Dipolhälfte verläuft am Rand der Leiterplatte 1 und der Draht 2 der anderen Dipolhälfte verläuft am Rand der Leiterplatte 5. Der Fußpunkt der Antenne kann auf der einen oder anderen Leiterplatte angeordnet sein. In der Fig. 3 ist er auf der Leiterplatte 5 angebracht. Am unteren Rand der Leiter platte 1 ist ein Blech 6 vorhanden und der Draht 2 der un teren Dipolhälfte ist mit diesem Blech 6 verbunden und eswirkt somit als kapazitive Belastung der Antenne. Zwischen den Leiterplatten 1 und 5 ist am oberen Rand ein Blech 7 angebracht, das mit einer metallisierten Fläche 8 auf der Leiterplatte 5 in Verbindung steht. Mit dem Blech 7 und der Fläche 8 ist das Ende des Drahtes 2 der oberen Dipolhälfte verbunden, damit eine kapazitive Belastung der Antenne entsteht. Es sind auch Anordnungen nur mit Blechen oder metallischen Flächen oder einer anderen als der gezeigten Kombination als kapazitive Belastung möglich.In radio receivers with a printed circuit board, the wires 2 of the antenna run on the longer edge of the printed circuit board 1. Some radio receivers have two printed circuit boards 1 and 5, of which the printed circuit board 5 is smaller than the printed circuit board 1, for example. The circuit boards 1 and 5 are shown in perspective in FIG. 3. The wire 2 of the one dipole half runs on the edge of the circuit board 1 and the wire 2 of the other dipole half runs on the edge of the circuit board 5. The base point of the antenna can be arranged on one or the other circuit board. In Fig. 3 it is attached to the circuit board 5. At the bottom of the circuit board 1 there is a sheet 6 and the wire 2 of the lower dipole half is connected to this sheet 6 and thus acts as a capacitive load on the antenna. Between the circuit boards 1 and 5, a sheet 7 is attached to the upper edge, which is connected to a metallized surface 8 on the circuit board 5. With the plate 7 and the surface 8, the end of the wire 2 of the upper dipole half is connected, so that a capacitive load on the antenna arises. Arrangements are also only possible with sheet metal or metallic surfaces or a combination other than the one shown as a capacitive load.
Im Bereich des Fußpunktes der Antenne, der im dargestellten Beispiel mit dem unteren Rand der Leiterplatte 5 zusammenfällt, ist nun auf der Leiterplatte 1 für alle diesen Bereich überschreitenden Leiterbahnen die Auftrennung für die HF-Signale vorgenommen worden. Dazu sind in die hochohmigen Leiterbahnen Widerstände R (nur ein Widerstand dargestellt) in kapazitäts- und induktivitätsarmer Bauform und in die ni ede rohmi gen Leiterbahnen Resonanzschwingkreise mit der Frequenz FO eingefügt. Die Resonanzschwingkreise können, wie schon beschrieben, alle in einem Schalenkern angeordnet sein. In the area of the base point of the antenna, which in the example shown coincides with the lower edge of the circuit board 5, the circuit board 1 has now been used for the separation of the HF signals for all conductor tracks exceeding this area. For this purpose, resonance resonant circuits with the frequency F O are inserted into the high-resistance conductor tracks, resistors R (only one resistor shown) with a low-capacitance and low inductance design, and into the low-resistance conductor tracks. As already described, the resonant resonant circuits can all be arranged in a shell core.

Claims

Patentansprüche Claims
1. Miniaturisierter mobiler Funkempfänger mit einem Gehäuse, mindestens einer Leiterplatte, auf der sich die Mehrzahl der Bauteile befinden, die durch Leiterbahnen miteinander verbunden sind, und mit einem gestreckt en Dipol als Antenne, der aus Antennendräht en besteht, die an ihren freien Enden mit einer kapazitiven Belastung versehen sind, d a d u r c h g e k e n n z e i c h n e t, daß die Antennendrähte (2) am Rand der Leiterplatte (1; 5) angeordnet sind, daß sich die kapazitive Belastung innerhalb des Gehäuses befindet und aus quer zu den Enden der Antennendrähte (2) verlaufenden Blechen (6, 7) und/oder leitenden Flächen (8) der Leiterplatte (5) besteht und daß alle sich von einer Dipolhälfte zur anderen Dipolhälfte erst rec kenden Leiterbahnen auf der Leiterplatte (1) in der Umgebung des Fußpunktes des Dipols für HF-Signale aufgetrennt sind.1. Miniaturized mobile radio receiver with a housing, at least one circuit board, on which the majority of the components are connected by interconnects, and with a stretched dipole as an antenna, which consists of antenna wires that are connected to their free ends are provided with a capacitive load, characterized in that the antenna wires (2) are arranged on the edge of the printed circuit board (1; 5), that the capacitive load is located within the housing and is made of sheets (6.) running transversely to the ends of the antenna wires (2) , 7) and / or conductive surfaces (8) of the circuit board (5) and that all of one dipole half to the other dipole half rec rec kenden conductor tracks on the circuit board (1) in the vicinity of the base of the dipole for RF signals are separated .
2. Funkempfänger nach Anspruch 1, dadurch gekennzeichnet, daß zur Auftrennung für die HF-Signale in jede Leiterbahn, die zwischen hochohmigen Quellen und Lasten verläuft, ein kapazi täts- und induktivitätsarmer Widerstand (R) und in jede Lei terbahn, die zwischen niederohmigen Quellen und Lasten ver läuft, ein Resonanzschwingkreis (Fo) eingefügt ist.2. Radio receiver according to claim 1, characterized in that a capacitance for the separation of the RF signals in each conductor track that runs between high-impedance sources and loads Low-resistance and low-inductance resistor (R) and a resonant circuit (Fo) is inserted into each conductor track that runs between low-resistance sources and loads.
3. Funkempfänger nach Anspruch 2, dadurch gekennzeichnet, daß die Widerstände (R) einen Wert von etwa 100 kohm haben.3. Radio receiver according to claim 2, characterized in that the resistors (R) have a value of about 100 kohms.
4. Funkempfänger nach Anspruch 2, dadurch gekennzeichnet, daß jeder Resonanzschwingkreis (Fo) aus auf einen Spulenkörper gewickelten Draht besteht.4. Radio receiver according to claim 2, characterized in that each resonant circuit (Fo) consists of wire wound on a coil former.
5. Funkempfänger nach Anspruch 4, dadurch gekennzeichnet, daß für die Resonanz schwi ngkrei se (Fo) ein einziger Spulenkörper vorgesehen ist und alle Drähte miteinander verdrillt sind.5. Radio receiver according to claim 4, characterized in that for the resonance Schwi ngkrei se (Fo) a single coil former is provided and all the wires are twisted together.
6. Funkempfänger nach Anspruch 5, dadurch gekennzeichnet, daß der Spulenkörper von einem Schalenkern umgeben ist.6. Radio receiver according to claim 5, characterized in that the coil body is surrounded by a shell core.
7. Funkempfänger nach Anspruch 2, 4, 5 oder 6, dadurch gekennzeichnet, daß die Schwingkreise (Fo) etwa auf die Empfangsfrequenz des Funkempfängers abgestimmt sind.7. Radio receiver according to claim 2, 4, 5 or 6, characterized in that the resonant circuits (Fo) are matched approximately to the reception frequency of the radio receiver.
8. Funkempfänger nach Anspruch 1, dadurch gekennzeichnet, daß bei zwei übereinander angeordneten Leiterplatten ( 1 , 5 ) der Antennendraht (2) der einen Dipolhälfte am Rand der einen Leiterplatte (1) und der Antennendraht (2) der anderen Dipolhälfte am Rand der anderen Leiterplatte (5) angeordnet ist. 8. A radio receiver according to claim 1, characterized in that in the case of two printed circuit boards (1, 5) arranged one above the other, the antenna wire (2) of the one dipole half at the edge of one circuit board (1) and the antenna wire (2) of the other dipole half at the edge of the other Printed circuit board (5) is arranged.
EP19830901197 1982-04-20 1983-04-16 Antenna circuit for miniature radio receiver Expired - Lifetime EP0107676B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3214449 1982-04-20
DE19823214449 DE3214449A1 (en) 1982-04-20 1982-04-20 MINIATURIZED RADIO RECEIVER

Publications (2)

Publication Number Publication Date
EP0107676A1 true EP0107676A1 (en) 1984-05-09
EP0107676B1 EP0107676B1 (en) 1992-03-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830901197 Expired - Lifetime EP0107676B1 (en) 1982-04-20 1983-04-16 Antenna circuit for miniature radio receiver

Country Status (4)

Country Link
US (1) US4577195A (en)
EP (1) EP0107676B1 (en)
DE (2) DE3214449A1 (en)
WO (1) WO1983003716A1 (en)

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Also Published As

Publication number Publication date
DE3382531D1 (en) 1992-04-23
EP0107676B1 (en) 1992-03-18
WO1983003716A1 (en) 1983-10-27
US4577195A (en) 1986-03-18
DE3214449A1 (en) 1983-10-27

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