EP0795207B1 - Distributeur de commutation haute frequence - Google Patents

Distributeur de commutation haute frequence Download PDF

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Publication number
EP0795207B1
EP0795207B1 EP96927657A EP96927657A EP0795207B1 EP 0795207 B1 EP0795207 B1 EP 0795207B1 EP 96927657 A EP96927657 A EP 96927657A EP 96927657 A EP96927657 A EP 96927657A EP 0795207 B1 EP0795207 B1 EP 0795207B1
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EP
European Patent Office
Prior art keywords
terminals
circuit
distributor
switching
distributor according
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
EP96927657A
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German (de)
English (en)
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EP0795207A1 (fr
Inventor
Claus Hahn
Klaus KÖHNE
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.)
Ge Tronic Geislinger Electronic GmbH Nachrichtentechnik
Original Assignee
Ge Tronic Geislinger Electronic GmbH Nachrichtentechnik
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Publication of EP0795207A1 publication Critical patent/EP0795207A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01P1/10—Auxiliary devices for switching or interrupting
    • H01P1/15—Auxiliary devices for switching or interrupting by semiconductor devices

Definitions

  • the invention relates to a high-frequency switching distributor for Switching between multiple inputs and multiple outputs, in particular several connectable with antenna converters Inputs and several outputs that can be connected to receivers, which has at least two on at least one circuit board arranged distribution circuits, from which each distribution circuit at a defined distance from has a mass of leads as conductor tracks, the are arranged on a dielectric layer, each the distribution circuits a first connection and N second Has connections and each of the N second connections one Distribution circuit with one of the N second connections of the other distribution circuit is connected.
  • High-frequency switching distributors are state of the art known and often used in connection with Parabolic antennas for satellite reception in the field of Consumer electronics. These are often complex crossings to be realized on the circuit boards, because in the HF range the entire conductor tracks on the Circuit boards always at a defined distance from one Ground plane must be run to a uniform To get wave impedance.
  • US-A-4 525 689 is a high-frequency switching distributor known with the features mentioned, which for Switch between multiple inputs and multiple outputs serves.
  • the distributor circuits are arranged on two different levels, namely on the one hand, part of it on the so-called summer board and another part of it on the mother board.
  • the entire switching diodes are on the motherboard provided, which is arranged in the respective branch line are.
  • the individual branch lines leading to the output Lead united are on the motherboard provided, which is arranged in the respective branch line are.
  • both the coupler structure and the whole Switching diodes arranged between two ground layers, and Transition from a line in the motherboard to the respective one Continuation of this line in the summer board is one Grounding required.
  • the invention is therefore based on the object, if possible simply and compactly constructed without crossings To provide switching distributors.
  • the solution according to the invention has the great advantage that the arrangement of a distribution circuit, for example one 1 in N or an N in 1 distribution circuit, in a single one Level this distributor circuit executed cross-free can be and that the arrangement of the various distribution circuits in different superimposed ones Levels offers the possibility of the switching distributor according to the invention as compact as possible.
  • the switching distributor according to the invention can be particularly compact then execute when the levels in which the individual Distribution circuits are arranged in parallel to each other are arranged.
  • one level is provided here a distribution circuit with its corresponding two-layer To provide circuit board.
  • a particularly compact embodiment of the invention Solution provides that the two distribution circuits open opposite sides of a common ground layer a three-layer circuit board are arranged so that one on top and the other Distribution circuit on the underside of the three-layer board is arranged and the ground layer is a good RF shield represents, so that a mutual influence of the distribution circuits is essentially avoided.
  • This solution concept can be inventively with more than continue two distribution circuits in that several three-layer boards are provided, on each of which Distribution circuits on the top and on the bottom are arranged.
  • branch circuit could, for example as Wilkinson divider, directional coupler or ferrite distributor or -Collector trained.
  • a particularly advantageous embodiment however, provides that the branch circuit formed as a resistor branch circuit is because such a resistance junction is the possibility offers, the branch circuit itself as compact as possible to execute.
  • Such semiconductor switches can preferably be switched over output side of the switching distributor created by the receivers Voltages or signals in already from the state of the Control technology in a known manner.
  • each other provided that the ground layer, except for the areas of the first and the second connections, RF-free runs.
  • connections between the second ports are different Distribution circuits can be implemented as desired his.
  • each of the second Connections via a corresponding cable with an input or to connect the output of the switching distributor according to the invention and thus one via the input or output itself Connection between one of the second connections of one Distribution circuit and one of the N ports of the other To create distribution circuits.
  • level branch lines run across the ground layer.
  • the level branch lines can be particularly advantageous then lead if these are parallel to each other run so that the coupling between the individual Level branch lines is as low as possible.
  • a particularly advantageous solution provides that the level branch lines run perpendicular to the ground layer.
  • a particularly useful solution provides that between ground shields adjacent to one another have a ground shield is provided, which in the simplest case by one running between the level branch lines, preferably parallel to these, formed line is.
  • the level branch lines could in turn be as microstrip lines arranged on a circuit board be trained.
  • the level branch lines it has proven to be advantageous if the level branch lines as circuit-free lines are built up.
  • the level branch lines thereby as HF vias or as Pin connections carried out.
  • level branch lines designed as HF through-plating and with two circuit boards spaced apart as pin connections.
  • level branch lines as simply as possible to create advantageous when the level branch lines lie in a branching level because thus a particularly simple connection between the level branch lines and the respective second connections the distribution circuit can be realized.
  • the N second connections are each arranged mirror-symmetrically to the ground layer.
  • N second Connections of both distribution circuits in a second Connection row of the circuit board are arranged, wherein preferably the second row of connections in the branching plane lies.
  • the N second ports are also in the second row of connections the N second ports in substantially constant Spaced from each other.
  • first connections of both distribution circuits with vertical Projection onto one of the levels in a first connection row are arranged and thus when projected onto one of the levels do not coincide with each other.
  • the first connections in the first connection row also in arranged substantially constant distances from each other.
  • An exemplary embodiment has proven particularly expedient proven in which the first and second connection rows in opposite areas of the circuit board are arranged, because in this case - as below described - a circuit board in a simple manner Use inverted to the other circuit board leaves.
  • first and the second row of connections parallel to each other Side edges of the circuit board run and in particular are arranged near the same.
  • the N second Connections in the second row of connections have the same spacing from each other.
  • each circuit board a first connection row with on both sides of the mirror plane in openings arranged at a first and second distance has, which is preferably in a first row of connections are arranged.
  • each with two distribution circuits are arranged one above the other in the form of a stack.
  • the first row of connections and the are expedient second row of connections arranged so that the connections in the Stack on top of each other. It is particularly useful when the N second connections of the second connection rows across transverse to the circuit boards Level branch lines are interconnected.
  • a particularly useful solution when using two Circuit boards provide that the two circuit boards are constructed identically, with a particularly useful Then contact the circuit boards leaves if one of the circuit boards in the stack opposite the other arranged around the inversion axis rotated by 180 ° is. This can save a second board design and which is a circuit board with double the number and thus be produced more efficiently.
  • Switch distributor was associated with the previous explanation of the individual embodiments no details given. So looks advantageous Solution before that each of the first connections with one input each of the switching distributor and that each of the N second connections of each distribution circuit with one of the Outputs is connected. In this case, the individual Distribution circuits designed as 1 in N distributors.
  • each of the first connections are each connected to an output and each of the N second connections of a distribution circuit with one input is connected. In this case it is the individual distributor circuits around N in 1 distributor.
  • the number of distributor circuits increases as little as possible hold, it is advantageously provided that the number of Distribution circuits corresponds to the number of outputs, if this is less than the number of inputs, or the number corresponds to the inputs if this is smaller than the number of the exits.
  • a first exemplary embodiment of a high-frequency switching distributor according to the invention shown in Fig. 1 includes one 3-layer circuit board designated as a whole, which has a ground layer 12 on the top a dielectric layer 14 and on the underside one dielectric layer 16 are arranged. On this dielectric Layers 14 and 16 now run as microstrip lines executed conductor tracks 18 or 28 of as a whole with 22 and 24 designated distribution circuits.
  • the conductor tracks 18, which are designed as microstrip lines, 28 have because of the between the common ground layer 12 lying dielectric 14 or 16 for high frequency a uniform wave resistance.
  • Each of the distribution circuits 22 and 24 shown in FIG Clarification of the individual elements separated from the Circuit board 10 shown includes a first Connection EA, from which a conductor 18 to an amplifier V leads a branch circuit 26 which a to the amplifier V connected trace 28a, which in N conductor tracks 28b with resistors 30 arranged in them branches, so that the branch circuit 26 as a resistance branch circuit is trained.
  • Each of the N conductor tracks 28b is connected via a switch 32 one of N second connections ZA connectable, the Switch 32 is preferably designed as a semiconductor switch are.
  • the total of N connections ZA are in the form of a second Terminal row 34 near a side edge 36 of the circuit board 10 arranged.
  • all N second connections ZA 1 of the upper distribution circuit 22 arranged in a plane 38 and all N second connections ZA 2 of the lower distribution circuit 24 lying in a plane 40 are arranged in pairs mirror-symmetrically to a plane 42 in which the ground layer 12 lies, so that each of the N second connections ZA 1 of the upper distributor circuit 22 can be connected to the corresponding connection of the N second connections ZA 2 of the lower distributor circuit 24 in each case via a connecting line 44 running perpendicular to the plane 42, the connecting line 44 being contact-free through an opening 46 in the ground layer 12 runs through.
  • the first connection EA 1 of the upper distributor circuit 22 and the first connection EA 2 of the lower distributor circuit 24 are arranged on opposite sides and at the same distance from a mirror plane 50 which is perpendicular to the planes 38 to 42 and perpendicular to the second connection row 34, preferably approximately runs centrally to the circuit board 10 so that the first connections EA 1 and EA 2 are on different sides of the mirror plane 50.
  • a housing 60 of the high-frequency switching distributor according to the invention is provided with a bottom 62, on which a row of pins 64 is arranged in the area of the N second connections ZA 1 and ZA 2 , which rise above the bottom 62 and which can be plugged through the circuit board 10 and conductively connected to the second connections ZA 1 and ZA 2 , the pins 64 simultaneously forming the connecting lines 44.
  • each of the pins 64 is connected to an output line 66, which leads to the corresponding output 70, so that the high-frequency switching distributor has a total of N outputs 70, which are designed, for example, as customary high-frequency connecting plugs or sockets.
  • first connections EA 1 and EA 2 are arranged on the bottom 62 in the region of the first connections EA 1 and EA 2 , which can likewise be pushed through the circuit board 10, the first connections EA 1 and EA 2 preferably likewise forming a first connection row 72 , which are arranged along and near a side edge 78 opposite the side edge 36 of the circuit board 10.
  • the pins 74 are in turn in the first embodiment through input lines 76 with inputs 80 of the high-frequency switching distributor connected.
  • Pins 64 and 74 Preferably serve in the solution according to the invention Pins 64 and 74 not only for contacting the circuit board 10, but also at the same time to this fix.
  • a second, constructed in accordance with the present invention Embodiment of a high-frequency switching distributor, shown in Fig. 3 in contrast to the first embodiment a four in two switch distributors that it means that N 4 inputs 180 are distributed over two outputs 170.
  • a distribution circuit is in turn in each of the levels 38 and 40 122 and 124 arranged, which also with the Switch 32 connected to second terminals ZA which then follows the branch circuit 26 with the N Conductor tracks 28b and is arranged with the conductor track 28a, and then the amplifier V follows, which in turn then again via the conductor track 18 with the first connection EA connected is.
  • the second embodiment in the distribution circuits 122, 124, the resistors 30 between the second connections ZA and the switches 32 arranged.
  • the amplifier In contrast to the distribution circuits 22 and 24, at which of the amplifiers V is on the respective first Connection EA amplified signal present, the amplifier amplifies V in the distribution circuits 122 and 124 that over the conductor 28a incoming signal and gives the amplified Signal to the conductor track 18 and thus to the respective one first connection EA.
  • the second embodiment is the same Formed like the first embodiment, so that reference is made in full to the statements on this becomes.
  • a four in four switching distributor is shown.
  • This four in four switching distributor comprises a distribution circuit 222 or 224 in each of four levels 38, 40, 138, 140.
  • the distribution circuit 222 is in principle identical to the distribution circuit 122, while the distribution circuit 224 differs from the distribution circuit 222 distinguishes that the first connection EA 2 is arranged at a distance AB2 from the mirror plane 50, which is one third of the distance AB1 at which the first connection EA 1 of the distributor circuit 222 is arranged from the mirror plane 50.
  • the connection EA 2 is preferably arranged on the side of the mirror plane 50 opposite the first connection EA 1 .
  • the four in four switch distributors can be produced from two identical circuit boards 210 with mutually identical distributor circuits 222, 224, 222 *, 224 *, the second circuit board 210 * compared to the first circuit board 210 by one inch the axis of symmetry 51 lying on the mirror plane 50 is arranged rotated by 180 °, so that the first connections EA 1 * and EA 2 * are mirror-inverted with respect to the mirror plane 50 and thus all first connections EA 1 , EA 2 , EA 1 * and EA 2 * are in different positions in the first connection row 72.
  • the level branches 244 can also in a simple manner as lines running perpendicular to the levels 38 and 40 or 38 * and 40 * and extending in the branching plane 82, preferably pin lines, be designed so that in this case the signals present at the inputs 280 are distributed to all distributor circuits 222, 224, 222 * and 224 * via these level branches 244.
  • the level branches 244 pin connections that are not are identical to the pins protruding from the bottom 62 264 of the housing, which according to the exemplary embodiment 4 only one of the two circuit boards 210 * to contact.
  • the outputs 270 are also directly from connected to the bottom 62 projecting pins 273, which also only one of the two circuit boards 210 or 210 'contact with pins 273 via interconnect traces 276 directly in contact with lines 274 stand.
  • second connections ZA 1 and ZA 2 and ZA 1 * and ZA 2 * are preferably connected to one another with plated-through holes 243 passing through the respective circuit board 210 or 210 *.
  • ground lines 245 and 275 are preferably between two neighboring ones
  • EA and ZA conduct lines parallel RF lines with the desired characteristic impedance and each connect the ground layers 12 and 12 * together.
  • circuit boards 410 and 410 * in analogous to the circuit boards 310 and 310 * in the fourth embodiment relative to each other by 180 ° arranged rotated so that in both embodiments the same circuit board with the same assembly twice Can be used.

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Claims (24)

  1. Distributeur de commutation haute fréquence pour la commutation entre plusieurs entrées et plusieurs sorties, en particulier entre plusieurs entrées pouvant être reliées à des réémetteurs à antenne et entre plusieurs sorties pouvant être reliées à des récepteurs, lequel distributeur de commutation présente au moins deux circuits de distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) disposés sur au moins une platine de circuits (10, 210, 310, 410), dont chaque circuit du distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) présente des conducteurs (18, 28), servant de circuits conducteurs, passant suivant un intervalle défini par rapport à une masse (12), lesquels circuits conducteurs sont disposés sur une couche diélectrique (14, 16), où chacun des circuits du distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) présente une première connexion (EA) et n secondes connexions (ZA) et où chacune des n secondes connexions (ZA) d'un circuit du distributeur (22, 122, 222, 322, 422) est reliée à une des n secondes connexions (ZA) de l'autre circuit du distributeur (24, 124, 224, 324, 424),
    caractérisé en ce que chacun des deux circuits du distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) est disposé dans au moins un des deux plans (38, 40) l'un arrangé sur l'autre, et en ce que sont disposés, dans le plan respectif (38, 40), la première connexion (EA), un circuit de ramification (26) se ramifiant d'un circuit (28a) relié à la première connexion (EA), en N circuits dérivés (28b) et comprenant à chaque fois un commutateur (32) se trouvant dans chacun des N circuits dérivés (28b), et les N secondes connexions (ZA) dont chacune est reliée à un des N circuits dérivés (28b).
  2. Distributeur de commutation selon la revendication 1, caractérisé en ce que les plans (38, 40) sont parallèles entre eux.
  3. Distributeur de commutation selon la revendication 1 ou 2, caractérisé en ce que les deux circuits du distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) sont disposés sur des faces opposées d'une couche commune à la masse (12), sur une platine de circuits (10) à trois couches.
  4. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que le circuit de ramification (26) est réalisé comme une ramification à résistance.
  5. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que les commutateurs (32) sont réalisés comme des commutateurs à semiconducteurs.
  6. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche à la masse (12) passe sans traversée haute fréquence (HF), à l'exception des zones des premières connexions (EA) et des secondes connexions (ZA).
  7. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que, à chaque fois, une des N secondes connexions (ZA) de l'un des circuits du distributeur est reliée à chaque fois à l'une des N secondes connexions (ZA) de l'autre circuit du distributeur, via un circuit de ramification de plan (44, 244, 344, 444), pour former une connexion commune.
  8. Distributeur de commutation selon la revendication 7, caractérisé en ce que les circuits de ramification de plan (44, 244, 344, 444) passent transversalement par rapport aux plans (38, 40).
  9. Distributeur de commutation selon la revendication 7 ou 8, caractérisé en ce que les circuits de ramification de plan (44, 244, 344, 444) sont parallèles entre eux.
  10. Distributeur de commutation selon l'une quelconque des revendications 7 à 9, caractérisé en ce que les circuits de ramification de plan (44, 244, 344, 444) sont perpendiculaires aux plans (38, 40).
  11. Distributeur de commutation selon l'une quelconque des revendications 7 à 10, caractérisé en ce que les circuits de ramification de plan (44, 244, 344, 444) sont réalisés comme des circuits sans platine.
  12. Distributeur de commutation selon l'une quelconque des revendications 7 à 11, caractérisé en ce que les circuits de ramification de plan (44, 244, 344, 444) se trouvent dans un plan de ramification (82).
  13. Distributeur de commutation selon la revendication 12, caractérisé en ce que les circuits de ramification de plan (44, 244, 344, 444) passent sans croisement dans le plan de ramification (82).
  14. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que les N secondes connexions (ZA) des deux circuits du distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) sont disposées dans une seconde rangée de connexions (34) de la platine de circuits (10).
  15. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que les premières connexions (EA) des deux circuits du distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) sont disposées, dans le cas d'une projection perpendiculaire sur un des plans (38, 40), dans une première rangée de connexions (72) de la platine de circuits (10).
  16. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que les premières connexions (EA) des circuits du distributeur (22, 24, 122, 124, 222, 224, 322, 324, 422, 424) sont disposées en étant séparées l'une de l'autre par un intervalle, dans une direction parallèle aux plans (38, 40).
  17. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que au moins deux platines de circuits (210, 210*) sont disposées en étant superposées sous la forme d'une pile.
  18. Distributeur de commutation selon la revendication 17, caractérisé en ce que les rangées de connexions (34, 72) sont superposées dans la pile.
  19. Distributeur de commutation selon la revendication 17 ou 18, caractérisé en ce que les secondes connexions (ZA) disposées dans les secondes rangées de connexion (34) sont reliées entre elles par des circuits de ramification de plan (244, 344, 444) passant transversalement par rapport aux platines de circuits (210, 210*, 310, 310*, 410, 410*).
  20. Distributeur de commutation selon la revendication 19, caractérisé en ce que les secondes connexions (ZA) des platines de circuits (210, 210*, 310, 310*, 410, 410*) sont reliées entre elles au moyen de circuits de ramification de plan sans platine (244, 344, 444).
  21. Distributeur de commutation selon l'une quelconque des revendications 17 à 20, caractérisé en ce que les platines de circuits (210, 210*, 310, 310*, 410, 410*) sont configurées en étant identiques.
  22. Distributeur de commutation selon la revendication 21, caractérisé en ce que l'une des platines de circuits (210*, 310*, 410*) est disposée dans la pile en étant tournée de 180° par rapport à l'autre platine de circuits (210, 310, 410).
  23. Distributeur de commutation selon l'une quelconque des revendications précédentes, caractérisé en ce que chacune des premières connexions (EA) est reliée à chaque fois à une entrée (80, 480) et en ce que chacune des N secondes connexions de chaque circuit du distributeur (22, 24, 422, 424) est reliée chaque fois à une sortie (70, 470).
  24. Distributeur de commutation selon l'une quelconque des revendications 1 à 22, caractérisé en ce que chacune des premières connexions (EA) est reliée à chaque fois à une sortie (170, 270, 370) et en ce que chacune des secondes connexions (ZA) de chaque circuit du distributeur (122, 124, 222, 224, 322, 324) est reliée à chaque fois à une entrée (180, 280, 380).
EP96927657A 1995-08-30 1996-08-02 Distributeur de commutation haute frequence Expired - Lifetime EP0795207B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19531951 1995-08-30
DE19531951A DE19531951C1 (de) 1995-08-30 1995-08-30 Hochfrequenzschaltverteiler
PCT/EP1996/003404 WO1997008771A1 (fr) 1995-08-30 1996-08-02 Distributeur de commutation haute frequence

Publications (2)

Publication Number Publication Date
EP0795207A1 EP0795207A1 (fr) 1997-09-17
EP0795207B1 true EP0795207B1 (fr) 2000-04-26

Family

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Application Number Title Priority Date Filing Date
EP96927657A Expired - Lifetime EP0795207B1 (fr) 1995-08-30 1996-08-02 Distributeur de commutation haute frequence

Country Status (5)

Country Link
US (1) US5834990A (fr)
EP (1) EP0795207B1 (fr)
AU (1) AU6741296A (fr)
DE (2) DE19531951C1 (fr)
WO (1) WO1997008771A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1014468A3 (fr) * 1998-12-21 2001-11-07 Hughes Electronics Corporation Matrice hyperfréquence de commutation flexible
US6208219B1 (en) * 1999-05-12 2001-03-27 Samuel Singer Broadband RF circuits with microstrips laid out in randomly meandering paths
JP2009130812A (ja) * 2007-11-27 2009-06-11 Sharp Corp デュアルチャンネル放送受信機及びそれを備えた携帯端末
WO2013066968A1 (fr) 2011-10-31 2013-05-10 Technology Service Corporation Systèmes et méthodes de sélection de canal rf haute puissance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321717A (en) * 1965-09-07 1967-05-23 Willis H Harper Low-loss, broadband, programmable monopulse beam-selector switch
US3813497A (en) * 1972-04-12 1974-05-28 Communications Satellite Corp Microwave multiplex switch
FR2226094A5 (fr) * 1972-08-07 1974-11-08 Labo Cent Telecommunicat
US4525689A (en) * 1983-12-05 1985-06-25 Ford Aerospace & Communications Corporation N×m stripline switch
US4779065A (en) * 1987-04-28 1988-10-18 General Electric Company Microwave signal routing matrix
US5053731A (en) * 1990-09-12 1991-10-01 Hewlett-Packard Company Software reconfigurable transmission line apparatus
US5446424A (en) * 1994-05-18 1995-08-29 Ail Systems, Inc. Microwave crosspoint blocking switch matrix and assembly employing multilayer stripline and pin diode switching elements

Also Published As

Publication number Publication date
WO1997008771A1 (fr) 1997-03-06
US5834990A (en) 1998-11-10
AU6741296A (en) 1997-03-19
DE19531951C1 (de) 1997-02-06
DE59605048D1 (de) 2000-05-31
EP0795207A1 (fr) 1997-09-17

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