Abstract: A band monitoring device for a radio communication system in which each of a plurality of subscribers is allocated a fixed sequence of frequencies f to be used comprises: a detector to determine a time-frequency representation of a usage of at least one frequency band of the radio communication system; a memory to store the fixed sequences; and an evaluation unit to divide the time-frequency representation into a first component that is plausible with the fixed sequences and into a second component that is inconsistent with the fixed sequence.

Abstract: A manufacturing device network including a power supply line having supply connectors, at least one manufacturing device provided with a device supply line having a device connector for detachably connecting the manufacturing device with a supply connector. The requirement of power by the manufacturing device is monitored and each manufacturing device may be identified in the associated power supply network, independent from the producer or the design of the manufacturing device, is obtained by the supply connectors and/or said device connector being provided with a monitoring unit. A receiving unit is provided for receiving data from communication means. An identifying unit can transmit an identification signal identifying the manufacturing device to the receiving unit. Sensor means can monitor a parameter being related to the transfer of power through the device connector to the manufacturing device and to transmit a signal representing said parameter to the receiving unit.

Abstract: The invention provides a device for a computer tomography gantry (91) for transmitting data, wherein the gantry comprises a stationary part (92) and a rotary part (93). The device is adapted to transmit the data between the stationary part of the gantry (92) and the rotary part (93) of the gantry (91). The device comprises a hollow conductor (104, 204, 308) which is adapted to guide a first wave, a sender (102, 103) which is adapted to send the first wave inside the hollow conductor and a receiver (106) which is adapted to receive the first wave after a runtime inside the hollow conductor (104, 204, 308). A further aspect of the invention is a computer tomography gantry (91) comprising a device according to the inventive concept. Using the described device allows to transmit data between the rotary (93) and the stationary part (92), to measure a rotating speed of the rotary part (93) and to measure a position of the rotary part (93) with respect to the stationary part (92).

Abstract: Elements and methods for forming elements that operate with acoustic waves are disclosed. The element includes a piezoelectric electric substrate that has a first thermal coefficient of expansion, electrically conducting element structures on an upper side of the substrate, a compensation layer on an underside of the substrate, and an SiO2 layer over the element structures.

Abstract: An apparatus including a piezoelectric substrate having at least one transducer electrode structure. The structure having a metallization formed by one or more metals with a mean specific density that is at least 50% higher than that of aluminum. The structure having a compensation layer that is applied fully or partially over the metallization. The compensation layer is of a material having a temperature dependence of elastic constants that counteracts the temperature coefficient of frequency of the substrate. The compensation layer has a thickness that is less than 15% of an acoustic wavelength of a wave capable of propagation in the structure.

Abstract: Elements and methods for forming elements that operate with acoustic waves are disclosed. The element includes a piezoelectric electric substrate that has a first thermal coefficient of expansion, electrically conducting element structures on an upper side of the substrate, a compensation layer on an underside of the substrate, and an SiO2 layer over the element structures.

Abstract: SAW component with improved temperature coefficient of frequency To reduce losses in a SAW component assembled on a piezoelectric substrate (S), the mass load on the metallization (M) is increased until the propagation velocity of the surface wave comes to rest below the propagation velocity of the fast shear wave. To limit the increase in the temperature coefficient of frequency in this process, a metallization with a significantly higher specific density than [that of] Al is used. The temperature coefficient of frequency of the component is simultaneously reduced by a compensation layer (K) applied to essentially the entire surface, said compensation layer being made of a material having a temperature dependency of the elastic coefficient that counteracts that of the substrate-metallization combination.

Abstract: An apparatus and method for generating coded high-frequency signals, having a converter, which converts non-electrical primary energy available from the surroundings into electrical energy, an element with a nonlinear characteristic curve, which is coupled to the converter, and a coding device coupled to the element with a nonlinear characteristic curve.

Abstract: Radio-interrogated surface-wave technology sensor, in which the sensitive element (12) is an impedance which is electrically connected as termination to a surface-wave structure (26) of the sensor.

Abstract: A mobile data carrier (1) including a transponder having a slot antenna (2) and a surface wave component (3), which serves as transmitter and/or receiver and which is electrically connected to the slot antenna (2). It is of advantage that the slot antenna (2) includes an antenna sheet (21) and an antenna slot (22), and that the surface wave component (3) has electrical contactors (31, 32), which are electrically connected to the left and right of the antenna slot (22). The surface wave component (3) is preferably fixed to the underside (213) of the antenna sheet (21). An additional, preferably electrically-conducting base plate (5) is mounted on the above-described arrangement with spacers (41, 42).

Abstract: In a high-voltage installation having at metallic encapsulating housing, a cone antenna is provided as a device for transmitting electromagnetic signals. The cone tip antenna facing the inner wall of the encapsulating housing resulting in an optimal coupling characteristic.

Abstract: An encapsulated installation, in particular a switching installation for high or medium voltage, includes a plurality of sensors located in an interior of an encapsulation. A central monitoring device is provided for information interchange with the surface acoustic wave sensors. An antenna element of the monitoring device is disposed at the encapsulation and is directed towards the interior. The sensors can be interrogated selectively.

Abstract: Radio-interrogated surface-wave technology sensor, in which the sensitive element (12) is an impedance which is electrically connected as termination to a surface-wave structure (26) of the sensor.

Abstract: An encapsulated tubular conductor having at least two antenna elements disposed on the capsule thereof for maintaining therebetween wireless information transmission in a transmitting-receiving direction, and a transmitting-receiving device located outside the capsule and assigned to one of the antenna elements includes another transmitting/receiving device also disposed outside the capsule and assigned to the other of the antenna elements, the antenna elements being directed towards an interior space of the capsule, the interior space serving as a transfer path via which information is transferable between the transmitting-receiving devices.

Abstract: A method for detecting the position of a switching device and an encapsulated switching installation having at least one switching device. A transmitted signal is emitted into the interior of an encapsulation to make it possible to easily detect the position of a switching device in an encapsulated switching installation. A resultant reflection signal is received and stored. After a repetition of this process, the two received reflection signals are compared with one another. In the event of any discrepancy, a message signal is produced for the new switching state.

Abstract: A metalclad switchgear assembly for high or medium voltage, having a cladding, includes at least one sensor arranged in an interior space of the cladding for detecting a condition variable within the cladding, the sensor having an antenna; and a transmitting and receiving antenna directed towards the interior space, the transmitting and receiving antenna serving for performing a wireless information interchange with the sensor, and for simultaneously detecting electromagnetically partial discharges in the interior space.

Abstract: A pressure sensor with a reflective acoustic surface wave (SAW) delay line fashioned on a pressure-sensing membrane having at least three reflectors wherein the delay line extends over both an expanding region and a compressing region of the pressure-sensing membrane.

Abstract: A radio-interrogated, surface-wave technology current transformer for high/medium-voltage systems includes a magnetosensitive element connected to a surface-wave structure of a surface-wave configuration as a termination of the surface-wave structure. A response signal of the surface-wave configuration is information regarding current strength/direction and phase of the current instantaneously flowing through the system, which is evaluated by a ground station. By virtue of the radio transmission, there is no electrical insulation problem, and the use of a radio-interrogated surface-wave configuration makes that part of the overall current transducer which is at high potential into a passive element of the same.

Abstract: An identification and/or sensor system includes an identification and/or sensor configuration having resonators for determining at least one parameter to be interrogated. The resonators have a quality being good enough to effect a storage of energy in the resonators. A transmitting and receiving apparatus transmits interrogation signals by radio to the identification and/or sensor configuration and receives and evaluates reply signals transmitted back from the identification and/or sensor configuration. The transmitting and receiving apparatus is a broadband device.