EP1155470A1 - Duplexer/diplexer comprised of two modularly constructed filters - Google Patents

Duplexer/diplexer comprised of two modularly constructed filters

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Publication number
EP1155470A1
EP1155470A1 EP00908936A EP00908936A EP1155470A1 EP 1155470 A1 EP1155470 A1 EP 1155470A1 EP 00908936 A EP00908936 A EP 00908936A EP 00908936 A EP00908936 A EP 00908936A EP 1155470 A1 EP1155470 A1 EP 1155470A1
Authority
EP
European Patent Office
Prior art keywords
duplexer
branches
diplexer
branch
filters
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.)
Withdrawn
Application number
EP00908936A
Other languages
German (de)
French (fr)
Inventor
Christian Block
Bernhard Reichel
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.)
TDK Electronics AG
Original Assignee
Epcos AG
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 Epcos AG filed Critical Epcos AG
Publication of EP1155470A1 publication Critical patent/EP1155470A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2136—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using comb or interdigital filters; using cascaded coaxial cavities

Definitions

  • Duplexer / diplexer made of two modular filters
  • the present invention relates to a duplexer /
  • Diplexer consisting of at least two filters for a transmitting branch and a receiving branch, in which each filter consists of a ceramic body, in each of which holes are arranged which lead from one side of the respective ceramic body to the opposite side, and in each case on the ceramic body from one Metallization of the ceramic body insulated connection surfaces for three ports for capacitive coupling / decoupling of RF signals are provided.
  • Duplexers transmitting / receiving switches are devices for separating the transmitting and receiving channels in order to prevent, in systems using a common transmitting and receiving antenna, that energy m reaches the receiver during transmission or energy m reaches the transmitter during reception.
  • Such duplexers are preferably used in analog mobile radio systems. The use of duplexers is also planned for future digital systems with high data rates.
  • duplexers have two branches, namely the transmitting branch and the receiving branch
  • diplexers are suitable for separating different bands of different mobile radio systems (e.g. DCS1800 / PCS) and may therefore have more than two branches.
  • duplexer which usually consists of two ceramic filters, in m mobile radio systems:
  • the insertion loss of both branches should be as low as possible, for example in order to lose as little transmission power as possible in the filter itself in the transmission branch.
  • the selection between the two branches should be as high as possible to suppress the generation of mixed products in the two branches.
  • the filters themselves should be as small as possible so that the duplexer does not take up too much space.
  • duplexers made from ceramic filters
  • the so-called monolithic duplexers a ceramic body is provided, in which a transmitting branch and a receiving branch, each made up of several coupled resonators, are arranged.
  • the advantage of such a monolithic duplexer lies in its production: only one ceramic body needs to be pressed in one piece, which considerably simplifies production compared to the production of two ceramic bodies.
  • a disadvantage that should not be underestimated is that the ceramic bodies of such monolithic duplexers are difficult to solder because of their size, and in addition corresponding mechanical stresses often arise on the respective underlays or “boards” since the ceramic filters themselves are not flexible.
  • duplexer ceramic filters or ceramic line resonators to be coupled are mounted on a carrier substrate.
  • the coupling structures between the ceramic filters are either contained in the carrier substrate or given by additional coils and capacitors.
  • a major disadvantage of this second type of duplexer is the high cost of the coupling structures. A reduction in the overall height due to the additional carrier substrate can only be achieved at the expense of a deterioration in the electrical parameters, such as in particular the insertion loss.
  • the present invention is therefore based on the object of providing a duplexer / diplexer which is simple to manufacture and assemble and which can be readily adapted to desired applications.
  • a duplexer / diplexer of the type mentioned at the outset in that the filters have a modular structure and are connected by shielding, and in that the two branches in their pass band are matched to an equal resistance value and in the stop band of the band adjacent to the pass band are broadband high impedance, so that when the two branches are connected in parallel, all three ports of the duplexer / diplexer are adapted to the resistance value.
  • the duplexer / diplexer according to the invention is therefore of modular construction.
  • the two branches are arranged in such a way that, for example, they are each adapted to a resistance value of 50 ohms in the pass band and are turned into broadband high-impedance or idle in the blocked band of the adjacent band to the pass band.
  • all three ports of the duplexer are matched to a resistance value of 50 ohms when the two branches are connected in parallel.
  • one of the two branches is not already high-impedance in the blocking area due to its basic structure, it can easily be set by a line structure on the side of the antenna port according to its length in the "Smith diagram", that is, the illustration of the right half of the impedance plane on the Complex reflection factor level, turn to idle.
  • the production of the duplexer / diplexer according to the invention is particularly simple since the two or more branches can be manufactured independently of one another.
  • the duplexer according to the invention is provided with approximately the same dimensions as an existing monolithic duplexer, as explained above, the two individual branches are each about half as large in the modular structure. With regard to the ability of the first surface to spread at approximately twice the frequency, however, the modular structure is considerably more advantageous.
  • the duplexer / diplexer according to the invention can even be constructed separately and miniaturize the receiving branch, for example, while leaving the transmitting branch as high as possible to maintain the low insertion loss.
  • a user is given as much freedom in design as possible.
  • All filters or duplexers / diplexers which consist of coupled ⁇ / 4 resonators have the disadvantage that they are capable of propagation at 3 times the frequency or a corresponding mixed product thereof. This can be remedied in an advantageous manner by a side structure which is at a distance of ⁇ / 12 from the front of the respective filter or branch of the duplexer / diplexer.
  • 2 is a side view of the duplexer according to the invention
  • 3 shows a plan view of a receiving branch of the duplexer according to the invention
  • Fig. 4 is a side view of the receiving branch of
  • Fig. 5 is a front view of the receiving branch of
  • FIG. 6 shows a detail in the direction of view of an arrow A in the receiving branch from FIG. 3.
  • Fig. 1 shows a front view of a duplexer 1 with a transmission branch 1 and a reception branch 2, both of which have a modular structure and are connected by a shield or sheet metal 3, which e.g. can be done by soldering.
  • the transmission branch 1 and the reception branch 2 each consist of a ceramic filter which is provided with metal pads 4 to 6 or 7 to 9, which are electrically separated from one another and from metallizations 11 by insulating gaps 10.
  • Through-holes 12 extend through the ceramic body of transmitting branch 1 and receiving branch 2, which can be designed in the usual way (see, for example, DE 195 34 158 Cl and DE 196 28 023 Cl).
  • the shield 3 made of metal is applied to one of the metallizations 11 and, as can be seen from the side view of FIG. 2, guided downwards and downwards at the front by the two ceramic bodies of the two branches 1, 2 at a distance from this front side curved outside.
  • Fig. 3 shows a plan view of the receiving branch 2 with the connection surface 7 for the antenna, the connection surface 8 for earth and the reception connection surface 9.
  • This figure shows the four through holes 12 through the ceramic body of the receiving branch 2. Areas 13 around the openings of the through holes 12 on the surface of the ceramic body are free of the metallization 11 (cf. FIG. 5).
  • An insulating gap 15 (cf. also FIG. 6) is located at a distance of ⁇ / 12 from the front of the respective branch 1 or 2. This can overcome disadvantages which are due to the fact that all filters or duplexers that are verkop - pelt ⁇ / 4 resonators exist, at which the triple frequency or a corresponding mixed product thereof can be propagated.
  • the two branches 1, 2 m are matched to an equal resistance value in their pass band and broadband in the stop band of the band adjacent to the pass band are high impedance.
  • the optimal ceramic shape that is suitable for this is found via appropriate pressing and sintering settings.
  • This resistance value can preferably be 50 ohms.
  • all three ports of the duplexer given by the connection pads 4 to 6 or 7 to 9 are then matched to the same resistance value, namely 50 ohms.
  • the high impedance of the two branches 1, 2 in the blocking region can be achieved by appropriate structuring of the antenna ports (cf., for example, connection area 7) and corresponding design of the side structure 14.
  • the two branches 1, 2 or their ceramic bodies can have different heights.
  • the receiving branch 2 it is possible for the receiving branch 2 to be miniaturized, while the transmitting branch 1 is left as high as possible in order to maintain a low attenuation.

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Abstract

The invention relates to a duplexer/diplexer comprised of at least one transmitting branch (1) and of at least one receiving branch (2). The transmitting branch (1) and the receiving branch (2) are modularly connected by a shielding (3) and are arranged such that both branches, in the passband thereof, are adjusted to an identical value of resistance (50 Ohms) and are highly resistive, with regard to broad-band, in the stop band of the band adjacent to each passband. As a result, all three ports of the duplexer/diplexer are adjusted to the same value of resistance when both branches (1, 2) are connected in parallel.

Description

Beschreibungdescription
Duplexer/Diplexer aus zwei modular aufgebauten FilternDuplexer / diplexer made of two modular filters
Die vorliegende Erfindung bezieht sich auf einen Duplexer/The present invention relates to a duplexer /
Diplexer aus wenigstens zwei Filtern für einen Sendezweig und einen Empfangszweig, bei dem jedes Filter aus einem Keramikkörper besteht, m dem jeweils Durchbohrungen angeordnet sind, die von einer Seite des jeweiligen Keramikkörpers zu dessen gegenüberliegenden Seite führen, und bei dem jeweils auf den Keramikkörper von einer Metallisierung des Keramikkörpers isolierte Anschlußflächen für dre Ports zum kapazitiven Ein- /Auskoppeln von HF-Signalen vorgesehen sind.Diplexer consisting of at least two filters for a transmitting branch and a receiving branch, in which each filter consists of a ceramic body, in each of which holes are arranged which lead from one side of the respective ceramic body to the opposite side, and in each case on the ceramic body from one Metallization of the ceramic body insulated connection surfaces for three ports for capacitive coupling / decoupling of RF signals are provided.
Duplexer (Sendeempfangsweichen) sind Einrichtungen zur Trennung des Sende- und Empfangskanales, um bei eine gemeinsame Sende- und Empfangsantenne verwendenden Anlagen zu verhindern, daß während des Sendens Energie m den Empfänger oder während des Empfangens Energie m den Sender gelangt. Solche Duplexer werden bevorzugt bei analogen Mobilfunksystemen eingesetzt. Auch für zukünftige Digitalsysteme mit hohen Datenraten ist die Verwendung von Duplexern vorgesehen.Duplexers (transmitting / receiving switches) are devices for separating the transmitting and receiving channels in order to prevent, in systems using a common transmitting and receiving antenna, that energy m reaches the receiver during transmission or energy m reaches the transmitter during reception. Such duplexers are preferably used in analog mobile radio systems. The use of duplexers is also planned for future digital systems with high data rates.
Während Duplexer so über zwei Zweige, nämlich den Sendezweig und den Empfangszweig verfügen, sind Diplexer zur Trennung von verschiedenen Bändern unterschiedlicher Mobilfunksysteme (z.B. DCS1800/PCS) geeignet und haben damit gegebenenfalls auch mehr als zwei Zweige.While duplexers have two branches, namely the transmitting branch and the receiving branch, diplexers are suitable for separating different bands of different mobile radio systems (e.g. DCS1800 / PCS) and may therefore have more than two branches.
An einen Duplexer, der gewöhnlich aus zwei Keramikfiltern besteht, werden gerade m Mobilfunksystemen die folgenden Anforderungen gestellt:The following requirements are placed on a duplexer, which usually consists of two ceramic filters, in m mobile radio systems:
Die Einfügungsdämpfungen beider Zweige sollten möglichst niedrig sein, um beispielsweise im Sendezweig möglichst wenig Sendeleistung im Filter selbst zu verlieren. Die Selektion zwischen den beiden Zweigen sollte jedoch möglichst hoch sein, um die Erzeugung von Mischprodukten in den beiden Zweigen zu unterdrücken. Gleichzeitig neben einer solchen hohen Unterdrückung von Mischprodukten, die gerade bei einem Mobil - funkgerät äußerst unerwünscht sind, sollten die Filter selbst möglichst klein sein, damit der Duplexer nicht zu viel Raum in Anspruch nimmt .The insertion loss of both branches should be as low as possible, for example in order to lose as little transmission power as possible in the filter itself in the transmission branch. However, the selection between the two branches should be as high as possible to suppress the generation of mixed products in the two branches. At the same time, in addition to such a high level of suppression of mixed products, which are particularly undesirable in a mobile radio, the filters themselves should be as small as possible so that the duplexer does not take up too much space.
Derzeit gibt es nun zwei grundsätzlich verschiedene Arten von Duplexern aus Keramikfiltern:There are currently two fundamentally different types of duplexers made from ceramic filters:
Bei der ersten Art, den sogenannten monolithischen Duplexern, ist ein Keramikkörper vorgesehen, in welchem ein Sendezweig und ein Empfangszweig aus jeweils mehreren gekoppelten Resonatoren angeordnet ist. Der Vorteil eines solchen monolithi- sehen Duplexers liegt in dessen Herstellung: es braucht nur ein Keramikkörper in einem Stück gepreßt zu werden, was die Fertigung erheblich gegenüber der Herstellung von zwei Keramikkörpern vereinfacht. Ein nicht zu unterschätzender Nachteil liegt aber darin, daß die Keramikkörper solcher mono- lithischer Duplexer wegen ihrer Größe schwer zu löten sind, wobei überdies oft entsprechende mechanische Spannungen auf den jeweiligen Unterlagen bzw. "Boards" entstehen, da die Keramikfilter selbst nicht flexibel sind. Außerdem ist bei monolithischen Duplexern das Oberwellenverhalten tendenziell gegenüber Duplexern aus getrennten Filtern schlechter, da die grundsätzlich immer auftretenden Rechteckhohlleitermoden schon bei niedrigen Frequenzen ausbreitungsfähig werden, was sich bei einem monolithischen Duplexer besonders nachteilhaft auswirkt .In the first type, the so-called monolithic duplexers, a ceramic body is provided, in which a transmitting branch and a receiving branch, each made up of several coupled resonators, are arranged. The advantage of such a monolithic duplexer lies in its production: only one ceramic body needs to be pressed in one piece, which considerably simplifies production compared to the production of two ceramic bodies. However, a disadvantage that should not be underestimated is that the ceramic bodies of such monolithic duplexers are difficult to solder because of their size, and in addition corresponding mechanical stresses often arise on the respective underlays or “boards” since the ceramic filters themselves are not flexible. In addition, in the case of monolithic duplexers, the harmonic behavior tends to be poorer than that of duplexers from separate filters, since the rectangular waveguide modes which always occur always become propagable even at low frequencies, which has a particularly disadvantageous effect in the case of a monolithic duplexer.
Bei der anderen Art von Duplexern werden zu verkoppelnde Keramikfilter bzw. keramische Leitungsresonatoren auf einem Trägersubstrat montiert. Die KoppelStrukturen zwischen den Keramikfiltern sind entweder im Trägersubstrat enthalten oder durch zusätzlich vorgesehene Spulen und Kondensatoren gegeben. Ein wesentlicher Nachteil dieser zweiten Art von Duplexern liegt in dem hohen Aufwand für die Koppelstrukturen. Auch ist eine Reduzierung der Bauhöhe wegen des zusätzlichen Trägersubstrates nur auf Kosten einer Verschlechterung der elektrischen Parameter, wie insbesondere der Einfügungsdämpfung, zu realisieren.In the other type of duplexer, ceramic filters or ceramic line resonators to be coupled are mounted on a carrier substrate. The coupling structures between the ceramic filters are either contained in the carrier substrate or given by additional coils and capacitors. A major disadvantage of this second type of duplexer is the high cost of the coupling structures. A reduction in the overall height due to the additional carrier substrate can only be achieved at the expense of a deterioration in the electrical parameters, such as in particular the insertion loss.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen Duplexer/Diplexer zu schaffen, der einfach herzustellen und zu montieren ist und dabei ohne weiteres an gewünschte Anwendungen angepaßt werden kann.The present invention is therefore based on the object of providing a duplexer / diplexer which is simple to manufacture and assemble and which can be readily adapted to desired applications.
Diese Aufgabe wird bei einem Duplexer/Diplexer der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß die Filter modular aufgebaut und durch eine Schirmung verbunden sind und daß die beiden Zweige in ihrem Durchlaßbereich an einen glei- chen Widerstandswert angepaßt und im Sperrbereich des zum Durchlaßbereich jeweiligen Nachbarbandes breitbandig hochohmig sind, so daß bei Parallelschaltung der beiden Zweige alle drei Ports des Duplexers/Diplexers an den Widerstandswert angepaßt sind.This object is achieved according to the invention in a duplexer / diplexer of the type mentioned at the outset in that the filters have a modular structure and are connected by shielding, and in that the two branches in their pass band are matched to an equal resistance value and in the stop band of the band adjacent to the pass band are broadband high impedance, so that when the two branches are connected in parallel, all three ports of the duplexer / diplexer are adapted to the resistance value.
Der erfindungsgemäße Duplexer/Diplexer ist also modular aufgebaut . Dabei sind bei einem Duplexer die beiden Zweige so angeordnet, daß sie beispielsweise jeweils im Durchlaßbereich an einen Widerstandswert von 50 Ohm angepaßt und im Sperrbe- reich des zum Durchlaßbereich jeweiligen Nachbarbandes breitbandig hochohmig bzw. in Leerlauf gedreht sind. Mit anderen Worten, alle drei Ports des Duplexers sind bei Parallelschaltung der beiden Zweige an einen Widerstandswert von 50 Ohm angepaßt .The duplexer / diplexer according to the invention is therefore of modular construction. In the case of a duplexer, the two branches are arranged in such a way that, for example, they are each adapted to a resistance value of 50 ohms in the pass band and are turned into broadband high-impedance or idle in the blocked band of the adjacent band to the pass band. In other words, all three ports of the duplexer are matched to a resistance value of 50 ohms when the two branches are connected in parallel.
Sollte einer der beiden Zweige nicht schon von seinem Grundaufbau her im Sperrbereich hochohmig sein, so läßt er sich durch eine Leitungsstruktur auf der Seite des Antennenports ohne weiteres entsprechend seiner Länge im "Smith-Diagramm", also der Abbildung der rechten Hälfte der Impedanzebene auf die Ebene des komplexen Reflexionsfaktors, in den Leerlauf drehen . Die Herstellung des erfindungsgemäßen Duplexers/Diplexers ist besonders einfach, da die beiden oder mehreren Zweige unabhängig voneinander gefertigt werden können.If one of the two branches is not already high-impedance in the blocking area due to its basic structure, it can easily be set by a line structure on the side of the antenna port according to its length in the "Smith diagram", that is, the illustration of the right half of the impedance plane on the Complex reflection factor level, turn to idle. The production of the duplexer / diplexer according to the invention is particularly simple since the two or more branches can be manufactured independently of one another.
Ist der erfindungsgemäße Duplexer etwa mit gleich großen Abmessungen wie ein bestehender monolithischer Duplexer, wie dieser oben erläutert wurde, versehen, so sind bei dem modu- laren Aufbau die beiden einzelnen Zweige jeweils etwa halb so groß. Bezüglich der Ausbreitungsf higkeit der ersten Oberfläche mit etwa doppelter Frequenz ist aber der modulare Aufbau wesentlich vorteilhafter.If the duplexer according to the invention is provided with approximately the same dimensions as an existing monolithic duplexer, as explained above, the two individual branches are each about half as large in the modular structure. With regard to the ability of the first surface to spread at approximately twice the frequency, however, the modular structure is considerably more advantageous.
Liegen beispielsweise Bauhöhenbeschränkungen vor, so besteht bei dem erfindungsgemäßen Duplexer/Diplexer sogar die Möglichkeit, diesen getrennt aufzubauen und dabei beispielsweise den Empfangszweig zu miniaturisieren, während der Sendezweig zur Erhaltung der niedrigen Einfügungsdämpfung so hoch als möglich belassen wird. Einem Anwender werden so Freiräume in der Gestaltung so weit als möglich eingeräumt.For example, if there are restrictions on the height, the duplexer / diplexer according to the invention can even be constructed separately and miniaturize the receiving branch, for example, while leaving the transmitting branch as high as possible to maintain the low insertion loss. A user is given as much freedom in design as possible.
Alle Filter oder Duplexer/Diplexer, die aus verkoppelten λ/4- Resonatoren bestehen, haben den Nachteil, daß sie bei der 3- fachen Frequenz oder einem entsprechenden Mischprodukt hier- von ausbreitungsf hig werden. Hier kann in vorteilhafter Weise durch eine Seitenstruktur Abhilfe geschaffen werden, die sich im Abstand von λ/12 von der Vorderseite des jeweiligen Filters bzw. Zweiges des Duplexers/Diplexers befindet.All filters or duplexers / diplexers which consist of coupled λ / 4 resonators have the disadvantage that they are capable of propagation at 3 times the frequency or a corresponding mixed product thereof. This can be remedied in an advantageous manner by a side structure which is at a distance of λ / 12 from the front of the respective filter or branch of the duplexer / diplexer.
Nachfolgend wird die Erfindung anhand der Zeichnungen näher erläutert. Es zeigen:The invention is explained in more detail below with reference to the drawings. Show it:
Fig. 1 eine Vordersicht des erfindungsgemäßen Duplexers,1 is a front view of the duplexer according to the invention,
Fig. 2 eine Seitensicht des erfindungsgemäßen Duplexers , Fig. 3 eine Draufsicht auf einen Empfangszweig des erfindungsgemäßen Duplexers,2 is a side view of the duplexer according to the invention, 3 shows a plan view of a receiving branch of the duplexer according to the invention,
Fig. 4 eine Seitensicht des Empfangszweiges vonFig. 4 is a side view of the receiving branch of
Fig. 3,Fig. 3,
Fig. 5 eine Vordersicht des Empfangszweiges vonFig. 5 is a front view of the receiving branch of
Fig. 3, undFig. 3, and
Fig. 6 eine Einzelheit in Blickrichtung eines Pfeiles A bei dem Empfangszweig von Fig. 3.FIG. 6 shows a detail in the direction of view of an arrow A in the receiving branch from FIG. 3.
Fig. 1 zeigt eine Vordersicht eines Duplexers 1 mit einem Sendezweig 1 und einem Empfangszweig 2, die beide modular aufgebaut und durch eine Schirmung bzw. ein Blech 3 aus Metall verbunden sind, was z.B. durch Löten geschehen kann. Der Sendezweig 1 und der Empfangszweig 2 bestehen jeweils aus einem Keramikfilter, das mit Metall-Anschlußflächen 4 bis 6 bzw. 7 bis 9 versehen ist, die durch Isolierspalten 10 voneinander und von Metallisierungen 11 elektrisch getrennt sind.Fig. 1 shows a front view of a duplexer 1 with a transmission branch 1 and a reception branch 2, both of which have a modular structure and are connected by a shield or sheet metal 3, which e.g. can be done by soldering. The transmission branch 1 and the reception branch 2 each consist of a ceramic filter which is provided with metal pads 4 to 6 or 7 to 9, which are electrically separated from one another and from metallizations 11 by insulating gaps 10.
Durch die Keramikkörper von Sendezweig 1 und Empfangszweig 2 erstrecken sich Durchbohrungen 12, die in üblicher Weise gestaltet sein können (vgl. beispielsweise DE 195 34 158 Cl und DE 196 28 023 Cl) .Through-holes 12 extend through the ceramic body of transmitting branch 1 and receiving branch 2, which can be designed in the usual way (see, for example, DE 195 34 158 Cl and DE 196 28 023 Cl).
Die Schirmung 3 aus Metall ist auf eine der Metallisierungen 11 aufgebracht, und, wie aus der Seitensicht von Fig. 2 zu ersehen ist, an der Vorderseite von den beiden Keramikkörpern der beiden Zweige 1 , 2 im Abstand von dieser Vorderseite nach unten geführt und nach außen gebogen.The shield 3 made of metal is applied to one of the metallizations 11 and, as can be seen from the side view of FIG. 2, guided downwards and downwards at the front by the two ceramic bodies of the two branches 1, 2 at a distance from this front side curved outside.
Fig. 3 zeigt eine Draufsicht auf den Empfangszweig 2 mit der Anschlußfläche 7 für die Antenne, der Anschlußfläche 8 für Erde und der Empfangs-Anschlußflache 9. Außerdem sind aus dieser Figur die vier Durchbohrungen 12 durch den Keramikkörper des Empfangszweiges 2 zu ersehen. Bereiche 13 um die Öffnungen der Durchbohrungen 12 an der Oberfläche des Keramikkörpers sind von der Metallisierung 11 frei (vgl. Fig. 5) .Fig. 3 shows a plan view of the receiving branch 2 with the connection surface 7 for the antenna, the connection surface 8 for earth and the reception connection surface 9. In addition, from This figure shows the four through holes 12 through the ceramic body of the receiving branch 2. Areas 13 around the openings of the through holes 12 on the surface of the ceramic body are free of the metallization 11 (cf. FIG. 5).
Ein Isolierspalt 15 (vgl. auch Fig. 6) befindet sich im Abstand von λ/12 von der Vorderseite des jeweiligen Zweiges 1 bzw. 2. Damit können Nachteile überwunden werden, die dadurch bedingt sind, daß alle Filter oder Duplexer, die aus verkop- pelten λ/4 -Resonatoren bestehen, bei der 3-fachen Frequenz oder einem entsprechenden Mischprodukt hiervon ausbreitungsfähig werden.An insulating gap 15 (cf. also FIG. 6) is located at a distance of λ / 12 from the front of the respective branch 1 or 2. This can overcome disadvantages which are due to the fact that all filters or duplexers that are verkop - pelt λ / 4 resonators exist, at which the triple frequency or a corresponding mixed product thereof can be propagated.
Bei dem erfindungsgemäßen Duplexer/Diplexer wird durch ent- sprechende Gestaltung der Bohrungen und der Metallisierungen 11 sowie einer Seitenstruktur 14 aus Metall bewirkt, daß die beiden Zweige 1, 2 m ihrem Durchlaßbereich an einen gleichen Widerstandswert angepaßt und im Sperrbereich des zum Durchlaßbereich jeweiligen Nachbarbandes breitbandig hochohmig sind. Die hierfür geeignete optimale Keramikform wird über entsprechende Preß- und Sintereinstellungen gefunden. Dieser Widerstandswert kann vorzugsweise 50 Ohm betragen. Bei Parallelschaltung der beiden Zweige 1, 2 sind dann alle drei durch die Anschlußflächen 4 bis 6 bzw. 7 bis 9 gegebenen Ports des Duplexers an dem gleichen Widerstandswert, nämlich 50 Ohm, angepaßt. Die Hochohmigkeit der beiden Zweige 1 , 2 im Sperrbereich kann durch entsprechende Strukturierung der Antennenports (vgl. beispielsweise Anschlußfläche 7) und entsprechende Ausführung der Seitenstruktur 14 erzielt werden.In the duplexer / diplexer according to the invention, by designing the bores and the metallizations 11 and a side structure 14 made of metal accordingly, the two branches 1, 2 m are matched to an equal resistance value in their pass band and broadband in the stop band of the band adjacent to the pass band are high impedance. The optimal ceramic shape that is suitable for this is found via appropriate pressing and sintering settings. This resistance value can preferably be 50 ohms. When the two branches 1, 2 are connected in parallel, all three ports of the duplexer given by the connection pads 4 to 6 or 7 to 9 are then matched to the same resistance value, namely 50 ohms. The high impedance of the two branches 1, 2 in the blocking region can be achieved by appropriate structuring of the antenna ports (cf., for example, connection area 7) and corresponding design of the side structure 14.
Die beiden Zweige 1, 2 bzw. deren Keramikkörper können unterschiedliche Höhen aufweisen. So ist es beispielsweise möglich, daß der Empfangszweig 2 miniaturisiert wird, während der Sendezweig 1 zur Erhaltung einer niedrigen Emfügungs- dämpfung so hoch wie möglich belassen wird. The two branches 1, 2 or their ceramic bodies can have different heights. For example, it is possible for the receiving branch 2 to be miniaturized, while the transmitting branch 1 is left as high as possible in order to maintain a low attenuation.

Claims

Patentansprüche claims
1. Duplexer/Diplexer aus wenigstens zwei Filtern für einen Sendezweig (1) und einen Empfangszweig (2), bei dem jedes Filter aus einem Keramikkörper besteht, in dem jeweils1. duplexer / diplexer from at least two filters for a transmission branch (1) and a reception branch (2), in which each filter consists of a ceramic body, in each
Durchbohrungen (12) angeordnet sind, die von einer Seite des jeweiligen Keramikkörpers zu dessen gegenüberliegenden Seite führen, und bei dem jeweils auf dem Keramikkörper von einer Metallisierung (11) des Keramikkörpers iso- lierte Anschlußflächen (4 bis 9) für drei Ports zum kapazitiven Ein-/Auskoppeln von HF-Signalen vorgesehen sind, d a d u r c h g e k e n n z e i c h n e t , daß die Filter modular aufgebaut und durch eine Schirmung (3) verbunden sind und die beiden Zweige (1, 2) in ihrem Durchlaßbereich an einem gleichen Widerstandswert angepaßt und im Sperrbereich des zum Durchlaßbereich jeweiligen Nachbarbandes breitbandig hochohmig sind, so daß bei Parallelschaltung der beiden Zweige (1, 2) alle drei Ports des Duplexers/Diple- xers an den Widerstandswert angepaßt sind.Bores (12) are arranged, which lead from one side of the respective ceramic body to the opposite side thereof, and in which connection surfaces (4 to 9) for three ports for capacitive on, which are insulated on the ceramic body by a metallization (11) of the ceramic body - / decoupling of RF signals are provided, characterized in that the filters are modular and connected by a shield (3) and the two branches (1, 2) are adapted in their pass band to a same resistance value and in the stop band of the respective pass band Neighboring band are broadband high impedance, so that when the two branches (1, 2) are connected in parallel, all three ports of the duplexer / duplexer are adapted to the resistance value.
2. Duplexer/Diplexer nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Hochohmigkeit der Zweige (1, 2) im Sperrbereich durch Strukturierung der Antennenports (7) und einer Seitenstruktur (14) erzielt ist.2. duplexer / diplexer according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the high impedance of the branches (1, 2) in the restricted area is achieved by structuring the antenna ports (7) and a side structure (14).
3. Duplexer/Diplexer nach Anspruch 1 oder 2 , d a d u r c h g e k e n n z e i c h n e t , daß der Widerstandswert 50 Ohm beträgt.3. duplexer / diplexer according to claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that the resistance value is 50 ohms.
4. Duplexer/Diplexer nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , daß die Zweige (1, 2) unterschiedliche Höhen aufweisen.4. duplexer / diplexer according to one of claims 1 to 3, d a d u r c h g e k e n n z e i c h n e t that the branches (1, 2) have different heights.
Duplexer/Diplexer nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , daß wenigstens ein Filter eine Metall-Seitenstruktur (14) aufweist .Duplexer / diplexer according to one of claims 1 to 4, characterized in that at least one filter has a metal side structure (14).
6. Duplexer/Diplexer nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , daß sich ein Isolierspalt (15) bei aus verkoppelten λ/4- Resonatoren bestehenden Filtern in einem Abstand von λ/12 von der Vorderseite des jeweiligen Filters befindet. 6. duplexer / diplexer according to claim 5, d a d u r c h g e k e n n z e i c h n e t that there is an insulating gap (15) in filters consisting of coupled λ / 4 resonators at a distance of λ / 12 from the front of the respective filter.
EP00908936A 1999-02-01 2000-01-26 Duplexer/diplexer comprised of two modularly constructed filters Withdrawn EP1155470A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19903855 1999-02-01
DE19903855A DE19903855B4 (en) 1999-02-01 1999-02-01 antenna Combiner
PCT/DE2000/000218 WO2000046871A1 (en) 1999-02-01 2000-01-26 Duplexer/diplexer comprised of two modularly constructed filters

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EP1155470A1 true EP1155470A1 (en) 2001-11-21

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US (1) US6696904B1 (en)
EP (1) EP1155470A1 (en)
JP (1) JP2002536901A (en)
CN (1) CN1339183A (en)
DE (1) DE19903855B4 (en)
WO (1) WO2000046871A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105099493B (en) * 2014-04-25 2018-05-18 华为技术有限公司 Radio circuit and mobile terminal

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6920666U (en) 1969-05-22 1969-11-27 Dieter Wolff UNROLL AND CUTTER
US4091344A (en) * 1977-01-19 1978-05-23 Wavecom Industries Microwave multiplexer having resonant circuits connected in series with comb-line bandpass filters
US4742562A (en) * 1984-09-27 1988-05-03 Motorola, Inc. Single-block dual-passband ceramic filter useable with a transceiver
US5023866A (en) * 1987-02-27 1991-06-11 Motorola, Inc. Duplexer filter having harmonic rejection to control flyback
US5103197A (en) * 1989-06-09 1992-04-07 Lk-Products Oy Ceramic band-pass filter
JPH0484501A (en) * 1990-07-27 1992-03-17 Oki Electric Ind Co Ltd Branching filter
US5293141A (en) * 1991-03-25 1994-03-08 Sanyo Electric Co., Ltd. Dielectric filter having external connection terminals on dielectric substrate and antenna duplexer using the same
JPH0621701A (en) * 1992-06-30 1994-01-28 Taiyo Yuden Co Ltd Filter inclusing dielectric resonator
JP3366021B2 (en) * 1992-07-29 2003-01-14 松下電器産業株式会社 Antenna duplexer
JPH06132706A (en) * 1992-09-07 1994-05-13 Murata Mfg Co Ltd Dielectric resonance parts
JP3407931B2 (en) * 1993-05-31 2003-05-19 三洋電機株式会社 Antenna duplexer and matching circuit adjustment method for antenna duplexer
JPH0795643B2 (en) * 1993-08-27 1995-10-11 株式会社村田製作所 Filter device
US5422610A (en) * 1993-09-29 1995-06-06 Motorola, Inc. Multi-filter device and method of making same
JP3230353B2 (en) * 1993-11-18 2001-11-19 株式会社村田製作所 Antenna duplexer
US5652555A (en) * 1994-06-03 1997-07-29 Murata Manufacturing Co., Ltd. Dielectrical filters having resonators at a trap frequency where the even/odd mode impedances are both zero
JP3450926B2 (en) * 1995-02-02 2003-09-29 日本特殊陶業株式会社 Dielectric filter and method of adjusting frequency bandwidth thereof
DE19534158C1 (en) * 1995-09-14 1997-03-13 Siemens Matsushita Components Microwave ceramic filter
KR970054817A (en) * 1995-12-27 1997-07-31 이형도 Duplex dielectric filter
US5745018A (en) * 1996-07-09 1998-04-28 Motorola Inc. Ceramic filter with a coplanar shield
DE19628023C1 (en) * 1996-07-11 1997-06-12 Siemens Matsushita Components Monolithic filter
US5790001A (en) * 1997-02-27 1998-08-04 Motorola, Inc. Shield and ceramic filter
US5864265A (en) * 1997-06-30 1999-01-26 Motorola Inc. Bandstop filter module with shunt zero
JPH11274813A (en) * 1998-03-24 1999-10-08 Ngk Spark Plug Co Ltd Dielectric filter and its manufacture
US5959511A (en) * 1998-04-02 1999-09-28 Cts Corporation Ceramic filter with recessed shield

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0046871A1 *

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Publication number Publication date
DE19903855A1 (en) 2000-10-19
CN1339183A (en) 2002-03-06
US6696904B1 (en) 2004-02-24
WO2000046871A1 (en) 2000-08-10
DE19903855B4 (en) 2010-04-15
JP2002536901A (en) 2002-10-29

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