WO2003105365A1 - Vorrichtung zur breitbandigen elektrischen verbindung zweier gegeneinander beweglicher einheiten - Google Patents
Vorrichtung zur breitbandigen elektrischen verbindung zweier gegeneinander beweglicher einheiten Download PDFInfo
- Publication number
- WO2003105365A1 WO2003105365A1 PCT/DE2003/001645 DE0301645W WO03105365A1 WO 2003105365 A1 WO2003105365 A1 WO 2003105365A1 DE 0301645 W DE0301645 W DE 0301645W WO 03105365 A1 WO03105365 A1 WO 03105365A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conductor arrangement
- conductor
- electrical signals
- balancing
- arrangement
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 158
- 239000003302 ferromagnetic material Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims description 6
- 230000005294 ferromagnetic effect Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 230000036039 immunity Effects 0.000 description 8
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/28—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium using the near field of leaky cables, e.g. of leaky coaxial cables
Definitions
- the invention relates to a device for transmitting electrical signals or energy between a plurality of mutually movable units.
- the term conductor structures refers to all conceivable forms of conductor structures which are suitable for carrying electrical signals.
- the signals are coupled out in the near field of the conductor structure.
- the signal should be extracted only in the area of the second unit.
- a further signal transmission in other areas of the conductor structure is usually undesirable since the broadband signals can lead to interference in other parts of the device or devices.
- Leakage lines as described for example in US Pat. No. 5,936,203, cannot be used for this type of conductor structure. Leakage lines are specifically designed to radiate a certain proportion of the guided radio frequency energy to the outside over the entire length. This is exactly what should be avoided here.
- Contacting signal extraction is also technically similar to contactless signal extraction.
- contactless decoupling is usually preferred because it is more reliable and maintenance-free.
- the conductor structures described here can be made either contacting or contactless.
- adjustments are possible according to the transfer task.
- a conductor structure for contacting transmission can have a particularly highly conductive surface, for example with a silver coating.
- a conductor structure for contactless transmission can be provided with a lacquer layer on the surface as a corrosion protection.
- the basic principles for designing the conductor structures are identical.
- a special embodiment of a contacting transmission device is described in US Pat. No. 5,208,581. An asymmetrical conductor system is also described here.
- the geometry here is symmetrical, but the conductor system is fed with an asymmetrical signal.
- the signal flow takes place via the middle conductor from the transmitter to the receiver and partly via one or both outer conductors or the computer tomography system itself.
- the reference surface here is the device itself.
- the geometry of the reference surface is not clearly symmetrical here. Due to the unbalanced signals with a not clearly defined signal path and the undefined reference area, this system emits high RF power. Even with data rates of 50 Mbaud, the current EMC standards can no longer be met without additional, expensive shielding.
- the conductor arrangements used here for transmission are usually strip lines or conductor Structures built using double-sided circuit boards.
- a glass fiber reinforced plastic is usually used as the carrier and dielectric.
- This carrier is provided on one side with a continuous conductor surface as an electrical reference surface or ground and on the other side with a strip-shaped conductor or the conductor structure.
- the signal level of the transmitter cannot normally be increased arbitrarily. Despite high symmetry, there is always little radiation. With higher symmetry, the radiation becomes lower and the signal levels can be increased further. At high bandwidth and data rates in the range of a few 100 MHz to 'several GHz no longer negligible attenuation and distortion of the signals occur. At usual conductor materials and a frequency of 1 GHz, attenuations of the order of 10 dB per meter were measured. With long lengths, this leads to unacceptable damping. In addition, there is an increased risk of asymmetries, since the dielectric cannot be manufactured symmetrically or homogeneously.
- the object is to design a broadband and cost-effective device for signal transmission which, based on a conductor arrangement with conductors or conductor structures, has high immunity to interference or low interference radiation.
- a device for signal transmission comprises at least one transmitter which generates the electrical signals to be transmitted and feeds them into a conductor arrangement. At least one such conductor arrangement is arranged along the path of the movement and carries the signals fed in by the transmitter. At least one receiver, which is movable relative to the transmitter and conductor arrangement, is used to decouple the signals from the conductor arrangement. Depending on the application, a transmitter can also feed several conductor arrangements. A conductor arrangement can also be fed by several transmitters. Furthermore, it is possible to use any number of receivers for decoupling signals on a conductor arrangement.
- Means for balancing electrical signals are provided. These means of symmetrization increase the electrical rical symmetry of signals carried in the conductor arrangement. If the symmetry of electrical signals when passing through the conductor arrangement is reduced by asymmetries of the conductor arrangement, it can be increased again by means of symmetrization according to the invention. This increased symmetry of the signals in turn enables increased immunity to interference or reduced interference radiation. Means according to the invention for balancing allow symmetrical signals or signal components to pass through on the conductor arrangement and dampen asymmetrical signals or signal components.
- the interference immunity is increased by damping external interference signals, which are preferably coupled into the conductor arrangement as asymmetrical signals (common mode signals), by means of the balancing means.
- the radiation is reduced due to the fact that preferably symmetrical in the conductor structure
- a conductor arrangement comprises at least one conductor structure in which electrical signals can be carried.
- Such a conductor structure contains one or more conductors made of a material that is preferably highly conductive.
- a conductor arrangement preferably contains a conductor structure composed of two symmetrically arranged conductors which are fed with symmetrical signals.
- conductor structures in asymmetrical designs or with several conductors can also be used. see two-wire system only worse values of immunity or radiation can be achieved.
- additional means for balancing electrical signals between at least one transmitter and the conductor arrangement are provided.
- Such additional means for balancing can already feed a well-balanced electrical signal into the conductor arrangement.
- the requirements for the means for symmetrization in the course of the conductor arrangement are lower, or a higher symmetry of the signal can be achieved.
- additional means for balancing electrical signals between the conductor arrangement and at least one receiver are provided.
- Such additional means for balancing the conductor arrangement and at least one receiver can reduce the level of unbalanced interference (common mode signals). This increases the interference immunity of the receiver.
- Another advantageous embodiment of the invention provides for a symmetrical design of the conductor arrangement.
- an embodiment of the transmission device according to the invention is also possible with an asymmetrical conductor arrangement in which means for balancing electrical signals are provided at preferably small intervals. This makes it possible to create a symmetrical one even over longer distances Get signal. However, it is much cheaper to choose a symmetrical design of the conductor arrangement from the outset. This means that the requirements for the means of symmetrization are significantly lower. It can also be used to achieve a much more symmetrical signal.
- a conductor arrangement comprises at least one electrically conductive reference surface assigned to each conductor structure. At least one dielectric for isolating the conductor structure and the reference surface is located between the conductor structure and the reference surface.
- a dielectric optionally has a high degree of homogeneity or a high degree of symmetry with respect to the electrical center of the longitudinal axis of the conductor structure.
- the concept of symmetry here refers to a symmetry of the electric field. Starting from the electrical center of the conductor structure, the electrical field lines should run symmetrically. This can be achieved, for example, with a mirror-symmetrical arrangement.
- the layer sequence of the dielectric can be different for the conductors if the total dielectric constants are the same on both sides and the areas are the same size.
- the symmetry of the electric field is related to an equipotential surface with a potential which - lo ⁇
- the ladder structure is usually open on one side towards the free space.
- the receivers are connected from this side.
- the opposite side and optionally also its boundary are closed off by surfaces that are as symmetrical as possible with a conductive surface.
- transmitters or balancing elements are attached in the immediate vicinity of the conductor arrangement. This can minimize additional interference. A possible mismatch can also be minimized with this. Furthermore, a particularly space-saving construction can be achieved in this way.
- Another embodiment of the invention provides that the means for balancing are integrated into the conductor arrangement itself.
- This integration enables a simpler structure with lower manufacturing costs.
- the integration takes place by means of multilayer printed circuit board technology. In this way, elements of the conductor arrangement and elements for symmetrization can be attached to different conductor layers.
- additional elements such as, for example, ferromagnetic elements, are applied to the conductor arrangement itself.
- These can optionally be individual discrete ferromagnetic elements which are applied to the conductor arrangement at specific intervals. Likewise, however, this can also be a longer distance of the conductor arrangement or a structure made of ferromagnetic material applied over its entire length.
- a line consisting of two conductors which are routed in parallel is provided for balancing electrical signals.
- the conductors run in parallel result in a coupling of electrical and magnetic fields. A balancing effect is thereby achieved.
- Appropriate configuration taking into account the geometry and the dielectric, allows adaptation to the characteristic impedance of the conductor arrangement. The symmetry device thus does not cause any additional reflections and interference on the conductor arrangement.
- At least one transformer preferably a balun or guanella
- at least one transformer is provided for the balancing.
- Symmetry elements are disclosed, for example, in Meinke, Gundlach, “Taschenbuch der Hochfrequenztechnik", Springer-Verlag, Berlin, 1968, in particular on p. 398.
- symmetry elements in the form of a flexible printed circuit board which has two conductors arranged parallel to one another and which is wound up into a coil.
- the flexible printed circuit board is wound up like a cable to form a coil.
- the design of the coils in planar printed circuit board technologies is particularly advantageous.
- Particularly space-saving components can be realized here in particular through the use of multi-layer techniques.
- a spiral-shaped conductor routing of at least two parallel conductor tracks on different layers of the circuit board is advantageously selected.
- At least one coil has a core made of ferromagnetic material.
- Another embodiment of the invention provides at least one transmitter which has a symmetrical output stage for generating symmetrical output signals.
- the balancing is preferably carried out by active means, such as difference amplifiers.
- FIG. 1 shows, in general form, a device according to the invention schematically.
- Fig. 2 shows a conductor arrangement with means for balancing ferrite material.
- FIG. 3 shows a section of a conductor arrangement according to FIG. 2 in a top view.
- Fig. 4 shows a simple means for balancing in the form of a printed circuit board with two parallel conductor tracks.
- Fig. 5 shows a particularly advantageous of the means for balancing with a spiral conductor arrangement.
- FIG. 6 shows the arrangement of a means for symmetrization in relation to the conductor arrangement.
- FIG. 8 shows a particularly advantageous arrangement of a transmitter
- Fig. 9 shows the arrangement of a ferromagnetic material along the conductor arrangement.
- FIG. 10 shows a particularly space-saving arrangement of a ferromagnetic material along the conductor arrangement.
- a device according to the invention is shown by way of example in FIG. 1.
- a transmitter (10) feeds electrical signals into the conductor arrangement (11a, 11b, 11c, lld).
- the receiver (12) is movably arranged in relation to the conductor arrangement and the transmitter (10) connected to it.
- Means for symmetrization (13a, 13b, 13c) are provided between the individual sections of the conductor arrangement. This balancing means that the signal is routed along the conductor arrangement.
- the relative movement takes place on predefined paths.
- Such tracks can be linear or circular, for example.
- the conductor arrangement (11a, 11b, 11c, lld) is along at least one of these tracks
- Movement arranged so that there is only a short distance between the conductor arrangement (11a, 11b, 11c, lld) and the receiver (12) at each point of the movement at which signals are to be transmitted.
- the distances are typically in a range from 0.1 mm to approx. 10 mm. Direct contact with a distance of 0 is possible. This is the case with galvanic transmission.
- it is necessary to design the surfaces in a special way. Normally, however, a contactless and thus low-wear transmission is desirable.
- There are larger distances than approx. 10 mm not excluded, but undesirable in most cases, since the radiation of the entire conductor arrangement should be so low that there is no interference or interference with other device parts or devices. Therefore, the transmission system is specifically designed so that the electromagnetic far field of the conductor arrangement is as small as possible and ideally zero.
- Means for symmetrization (13a, 13b, 13c) are arranged at predetermined intervals. These are advantageously ferromagnetic components, such as ferrite cores. In order to enable movement of the receiver (12) in the immediate vicinity of the conductor arrangement, the means for balancing are lowered.
- Fig. 3 shows a section of an arrangement with ferrite cores in a top view.
- a ferrite core (14) (shown here in section) is provided as a means of balancing, which surrounds the two conductors.
- This ferrite core could, for example, be a ring core or a core with a rectangular cross section.
- the conductors have a smaller cross section at the location of the ferrite core.
- the cross section can also remain unchanged. 4 shows a particularly advantageous embodiment of a means for balancing electrical signals.
- a conductor structure (1) consists of a symmetrically arranged pair of conductors, comprising a first conductor (la) and a second conductor (lb), which are spaced apart from a reference surface (2) by a dielectric (3).
- a conductor arrangement itself already has a certain symmetrizing effect, which can be significantly strengthened, for example, by winding it onto a ferrite core, preferably a ring core.
- the conductor structure is advantageously manufactured with a small geometry. For example, an overall width of two millimeters has proven effective.
- An additional layer of ferromagnetic material can be provided below the reference surface (2) in order to improve the symmetry effect.
- a second reference surface can be attached above the first and second conductors. This means that the conductors are completely shielded.
- a second layer of ferromagnetic material can also be provided above the conductor.
- the complete conductor structure can also be enclosed by ferromagnetic material.
- FIG. 5 shows another advantageous embodiment of a means for balancing.
- an arrangement of several conductors preferably two conductors, is arranged in parallel on different layers of a carrier (6), wound in a spiral.
- An optional ferrite core can be used to increase the inductance or balancing effect.
- a first ladder (la) is visible on the top layer.
- This arrangement can be contacted either by wire pins or a circuit board perpendicular to the support.
- the length of the conductors is preferably to be made substantially smaller than the smallest wavelength of the signal to be transmitted. For this reason, this type of device is used for balancing in miniaturized technology, for example in fine conductor technology, by laser cutting, sputtering or as a microstructure.
- a conductor arrangement in which the conductors (not shown here) are attached to a carrier (6) is used.
- the dielectric (3) between the conductors and the reference surface can be, for example, air or any other dielectric, such as the known plastics.
- At least one symmetrizing means (13) is arranged within the dielectric.
- FIG. 7 shows a perspective view of an arrangement in which a means for balancing (13) directly between a transmitter (10), which preferably already delivers a symmetrical output signal, and the conductor arrangement (11) comprising at least one first conductor (la) and a second conductor (lb) is arranged.
- the two conductors consist of a structure with individual ones
- Resonators Of course, any other conceivable conductor structure, for example in strip lines tion technology can be used. Such balancing means can also be used in the further course of the conductor arrangement.
- a first conductor (la) and a second conductor (lb) are arranged on a carrier (6).
- a reference surface (2) is also provided, which is electrically conductive.
- At least one dielectric (3) is provided between the reference surface and the conductors.
- the circuit board (15) is arranged in the space of the dielectric. This arrangement enables particularly short and symmetrical conductor paths to be implemented.
- a signal is fed to the transmitter by means of a line (16).
- FIG. 9 shows a particularly expedient arrangement in section, in which the ferrite material is arranged along the conductor structure. This results in a continuous balancing of the signal. It is essential here that the major part of the magnetic field is led around the two conductors and does not run through them. Such a guidance of the magnetic field can be achieved by the legs protruding on both sides of the conductor structure. Of course, a planar surface made of ferrite material without protruding legs can also be arranged on the back of the conductor structure. However, the symmetrization effect is less here.
- FIG. 10 shows a particularly space-saving arrangement analogous to FIG. 9.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003243898A AU2003243898A1 (en) | 2002-06-10 | 2003-05-21 | Device for the wideband electrical connection of two units which can be displaced in relation to each other |
DE10393268T DE10393268D2 (de) | 2002-06-10 | 2003-05-21 | Vorrichtung zur breitbandigen elektrischen Verbindung zweier gegeneinander beweglicher Einheiten |
EP03756947A EP1516438A1 (de) | 2002-06-10 | 2003-05-21 | Vorrichtung zur breitbandigen elektrischen verbindung zweier gegeneinander beweglicher einheiten |
US11/007,807 US7109819B2 (en) | 2002-06-10 | 2004-12-08 | Device for wideband electrical connection of two units that are movable relative to each other |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10225803A DE10225803A1 (de) | 2002-06-10 | 2002-06-10 | Vorrichtung zur breitbandigen elektrischen Verbindung zweier gegeneinander beweglicher Einheiten |
DE10225803.1 | 2002-06-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/007,807 Continuation US7109819B2 (en) | 2002-06-10 | 2004-12-08 | Device for wideband electrical connection of two units that are movable relative to each other |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003105365A1 true WO2003105365A1 (de) | 2003-12-18 |
Family
ID=29594366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/001645 WO2003105365A1 (de) | 2002-06-10 | 2003-05-21 | Vorrichtung zur breitbandigen elektrischen verbindung zweier gegeneinander beweglicher einheiten |
Country Status (5)
Country | Link |
---|---|
US (1) | US7109819B2 (de) |
EP (1) | EP1516438A1 (de) |
AU (1) | AU2003243898A1 (de) |
DE (2) | DE10225803A1 (de) |
WO (1) | WO2003105365A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009018815A2 (de) * | 2007-08-09 | 2009-02-12 | Fh Giessen Friedberg | Positionsbestimmung eines mobilen funkgerätes in bezug auf leckwellenleiter |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005056049C5 (de) * | 2005-07-29 | 2016-02-18 | Siemens Aktiengesellschaft | Vorrichtung zur kontaktlosen Übertragung elektrischer Signale zwischen zwei relativ zueinander bewegten Teilen mit verminderter Störstrahlung |
JP5653750B2 (ja) * | 2008-03-12 | 2015-01-14 | 富士フイルム株式会社 | 原版作製方法、凹形アレイモールドの製造方法、針状アレイシートの製造方法、原版 |
Citations (6)
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US3944912A (en) * | 1972-02-04 | 1976-03-16 | U.S. Philips Corporation | Magnetic detection means for sensing mobile ferromagnetic masses including pulse shaper circuit for generating a single pulse output |
US5287117A (en) * | 1989-10-26 | 1994-02-15 | Kabushiki Kaisha Toshiba | Communication system for transmitting data between a transmitting antenna utilizing a phased array antenna and a receive antenna in relative movement to one another |
DE19649682A1 (de) * | 1996-11-29 | 1998-06-04 | Schleifring & Apparatebau Gmbh | Vorrichtung zur berührungslosen Signalübertragung zwischen beweglichen Einheiten |
DE19700110A1 (de) * | 1997-01-03 | 1998-07-30 | Schleifring & Apparatebau Gmbh | Vorrichtung zur Übertragung von elektrischen Signalen |
JP2000195250A (ja) * | 1998-12-24 | 2000-07-14 | Toshiba Corp | 磁気メモリ装置 |
WO2001041315A2 (de) * | 1999-11-30 | 2001-06-07 | Schleifring Und Apparatebau Gmbh | Anordnung zur übertragung von elektrischen signalen und/oder energie zwischen relativ zueinander drehbaren teilen |
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US3757028A (en) * | 1972-09-18 | 1973-09-04 | J Schlessel | Terference printed board and similar transmission line structure for reducing in |
US4516097A (en) * | 1982-08-03 | 1985-05-07 | Ball Corporation | Apparatus and method for coupling r.f. energy through a mechanically rotatable joint |
US4916415A (en) * | 1989-01-17 | 1990-04-10 | Tektronix, Inc. | Balanced, impedance matched, coupling device |
US5140696A (en) * | 1989-02-28 | 1992-08-18 | Kabushiki Kaisha Toshiba | Communication system for transmitting data between a transmitting antenna utilizing strip-line transmission line and a receive antenna in relative movement to one another |
DE4412958A1 (de) * | 1994-04-17 | 1995-10-19 | Schwan Ulrich | Datenübertragungseinrichtung |
US5808518A (en) * | 1996-10-29 | 1998-09-15 | Northrop Grumman Corporation | Printed guanella 1:4 balun |
DE19646682C2 (de) | 1996-11-12 | 2001-12-06 | Mitsubishi Chem Corp | Elektrolytische Zelle und behandelte Elektrode |
DE10021671A1 (de) * | 2000-05-05 | 2001-11-15 | Schleifring Und Appbau Gmbh | Vorrichtung zur breitbandigen elektrischen Signalübertragung mit bidirektionaler Übertragungsstrecke |
US6433272B1 (en) * | 2000-09-19 | 2002-08-13 | Storage Technology Corporation | Crosstalk reduction in constrained wiring assemblies |
-
2002
- 2002-06-10 DE DE10225803A patent/DE10225803A1/de not_active Withdrawn
-
2003
- 2003-05-21 EP EP03756947A patent/EP1516438A1/de not_active Withdrawn
- 2003-05-21 WO PCT/DE2003/001645 patent/WO2003105365A1/de not_active Application Discontinuation
- 2003-05-21 DE DE10393268T patent/DE10393268D2/de not_active Expired - Fee Related
- 2003-05-21 AU AU2003243898A patent/AU2003243898A1/en not_active Abandoned
-
2004
- 2004-12-08 US US11/007,807 patent/US7109819B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3944912A (en) * | 1972-02-04 | 1976-03-16 | U.S. Philips Corporation | Magnetic detection means for sensing mobile ferromagnetic masses including pulse shaper circuit for generating a single pulse output |
US5287117A (en) * | 1989-10-26 | 1994-02-15 | Kabushiki Kaisha Toshiba | Communication system for transmitting data between a transmitting antenna utilizing a phased array antenna and a receive antenna in relative movement to one another |
DE19649682A1 (de) * | 1996-11-29 | 1998-06-04 | Schleifring & Apparatebau Gmbh | Vorrichtung zur berührungslosen Signalübertragung zwischen beweglichen Einheiten |
DE19700110A1 (de) * | 1997-01-03 | 1998-07-30 | Schleifring & Apparatebau Gmbh | Vorrichtung zur Übertragung von elektrischen Signalen |
JP2000195250A (ja) * | 1998-12-24 | 2000-07-14 | Toshiba Corp | 磁気メモリ装置 |
WO2001041315A2 (de) * | 1999-11-30 | 2001-06-07 | Schleifring Und Apparatebau Gmbh | Anordnung zur übertragung von elektrischen signalen und/oder energie zwischen relativ zueinander drehbaren teilen |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 2000, no. 10 17 November 2000 (2000-11-17) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009018815A2 (de) * | 2007-08-09 | 2009-02-12 | Fh Giessen Friedberg | Positionsbestimmung eines mobilen funkgerätes in bezug auf leckwellenleiter |
WO2009018815A3 (de) * | 2007-08-09 | 2009-10-01 | Fh Giessen Friedberg | Positionsbestimmung eines mobilen funkgerätes in bezug auf leckwellenleiter |
Also Published As
Publication number | Publication date |
---|---|
US20050168299A1 (en) | 2005-08-04 |
AU2003243898A1 (en) | 2003-12-22 |
US7109819B2 (en) | 2006-09-19 |
DE10393268D2 (de) | 2005-05-25 |
EP1516438A1 (de) | 2005-03-23 |
DE10225803A1 (de) | 2003-12-24 |
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