Patent application number | Description | Published |
20100176895 | CIRCUIT COMPRISING A VOLTAGE-DEPENDENT COMPONENT AND METHOD FOR OPERATING THE CIRCUIT - A circuit is proposed by means of which a ceramic component having two electrodes can be provided with a uniform, but periodically alternating BIAS voltage. The component has properties dependent on the level of the BIAS voltage and, for the purpose of an increased service life, is connected to a generator for generating a BIAS voltage and to means for periodically reversing the polarity of the BIAS voltage present at the electrodes. In a method for operating the component having variable properties, a uniform BIAS voltage, the polarity of which is periodically reversed, however, is applied to the electrodes, and the service life of the component is thus increased. | 07-15-2010 |
20100182216 | Adaptive Impedance Matching Circuit and Method for Matching for Duplex Operation Standards - A method for the impedance matching of front end circuits to antennas in mutually different transmission and reception frequency ranges is specified. A suitable matching circuit is furthermore specified. The impedance matching in a transmission frequency range is determined such that an excessively poor impedance matching in a reception frequency range is prevented in this case. | 07-22-2010 |
20100212127 | Process for Adapting Resonance Frequency of a BAW Resonator - A method of manufacturing a filter circuit including series and parallel coupled BAW resonators is given which compensates for frequency tolerances of the resonators which are due to the manufacturing process. The new method includes measuring a resonance frequency of at least one type of the BAW resonators produced on a wafer and defining a deviation from a desired frequency. A trimming layer is then deposited onto the entire wafer. At last, a thickness portion of the trimming layer is selectively removed, the portion being dependent on a location on the wafer and on the calculated deviation of the resonance frequency at this location. | 08-26-2010 |
20100237962 | COMPACT HIGHLY INTEGRATED ELECTRICAL MODULE WITH INTERCONNECTION OF BAW FILTER AND BALUN CIRCUIT AND PRODUCTION METHOD - A highly integrated electrical module is specified which comprises a filter circuit and a balun circuit. The space requirement is reduced by circuit components of the balun circuit being arranged at least in part on an inner side of the housing of the filter circuit. | 09-23-2010 |
20100265003 | IMPEDANCE MATCHING METHOD - An impedance matching method which is used to save electrical energy by virtue of the fact that the method switches between modes for controlling impedance matching and modes for regulation of the impedance matching depending on the situation. An algorithm which, on the basis of control signals from an external circuit environment, controls or regulates the impedance of a variable-impedance circuit element is implemented in a logic circuit LC. | 10-21-2010 |
20110187434 | SWITCHABLE CAPACITIVE ELEMENT WITH IMPROVED QUALITY FACTOR, AND METHOD OF PRODUCTION - A switchable capacitive element having an adjustable capacitance and an improved quality factor is specified. To this end, the characteristic variables of the switchable capacitive element are optimized in accordance with the equations cited in the description. | 08-04-2011 |
20110221543 | Impedance Matching Circuit for Matching Planar Antennas - A circuit includes a signal path having a node between a signal path input and a signal path output. A first inductive element is connected between the signal path input and the node and a first capacitive element whose capacitance is variably adjustable is connected between the node and the signal path output. A second variable-capacitance capacitive element is connected between the signal path input and ground. A second inductive element is connected between the node and ground, and a third inductive element is connected between the signal path output and ground. | 09-15-2011 |
20110298685 | Impedance Adjustment Circuit for Adjusting Planar Antennas - An impedance matching circuit for matching planar antennas includes a signal path with a signal path input and a signal path output. A first capacitive element with variable capacitance is connected between the signal path input and signal path output. A second capacitive element with variable capacitance is connected between the signal path and ground. A first inductive element is connected between the signal path input and ground. A second inductive element is connected between the signal path output and ground. An antenna line with an impedance between 30 and 60 ohm is connected to the signal path output. | 12-08-2011 |
20130009841 | Impedance Matching Circuit Capable of Broadband Operation - A broadband-operable impedance filter has capacitive elements of variable capacitance in the signal path, an inductive element in a parallel path connected in parallel to the signal path, and inductive elements in the ground path. The impedance filter allows communication in a first frequency band and the reception of HF signals in a second frequency band. | 01-10-2013 |
20130038387 | Detector Circuit - A detector circuit can be used for determining the reflection coefficients of HF signals in a signal path. The detector circuit includes a bidirectional hybrid coupler, logarithmic amplifiers connected to the hybrid couple, and a subtractor having an offset connection. | 02-14-2013 |
20130051588 | Electroacoustic Transducer having Reduced Losses due to Transverse Emission and Improved Performance due to Suppression of Transverse Modes - An electroacoustic transducer has reduced loss due to acoustic waves emitted in the transverse direction. For this purpose, a transducer comprises a central excitation area, inner edge areas flanking the central excitation area, outer edge areas flanking the inner edge areas, and areas of the busbar flanking the outer edge areas. The longitudinal speed of the areas can be set so that the excitation profile of a piston mode is obtained. | 02-28-2013 |
20130057359 | ADJUSTABLE CAPACITATIVE ELEMENT - The invention relates to an adjustable capacitative element which can assume discrete capacity values the impedance values Z, of which that it can assume are distributed as evenly as possible in the Smith Chart. An adjustable capacitative element comprises a capacitor which can assume discrete capacity values. The phase of the reflection factor or the impedance values of the capacity values are interspaced equidistantly. | 03-07-2013 |
20130082796 | COMPONENT - The present invention relates to a component (BE) which has a first duplexer operating with acoustic waves and a second duplexer operating with acoustic waves, wherein the first and second duplexers are arranged in a single SMD housing. In addition, the invention relates to a module (MO), which interconnects such a component (BE) and at least three 90° hybrids (HYB | 04-04-2013 |
20130234806 | Circuit Arrangement - A circuit arrangement includes an antenna port, a transmission port, and a reception port, each of which is connected to one respective 20° hybrid that splits an input signal into two output signals that are in quadrature. The circuit arrangement also includes two duplexers which are connected in such a way that the two output signals emitted by the 20° hybrid that is connected to the transmission port constructively interfere on the antenna port, while spurious signals caused by the two output signals destructively interfere on the reception port. | 09-12-2013 |
20130244589 | Apparatus for Wirelessly Transmitting Information, Communication Terminal for Wirelessly Transmitting Information and Impedance Matching Method - An apparatus for wirelessly transmitting information includes a transmitting/receiving unit and an antenna unit An electrical signal path is between the transmitting/receiving unit and the antenna unit. A front-end module contains at least one duplexer and is electrically connected into the signal path between the transmitting/receiving unit and the antenna unit. A detector unit is used for detecting signals proportional to radio-frequency signals propagating in the signal path. The detector unit is electrically coupled to the signal path between the transmitting/receiving unit and the front-end module. | 09-19-2013 |
20130257562 | ACOUSTIC WAVE FILTER HAVING REDUCED NON-LINEARITIES, AND METHOD FOR PRODUCTION - An acoustic wave filter having reduced non-linearities as well as a production method are disclosed. A filter comprises a first electroacoustic transducer having a first metallization ratio and a second electroacoustic transducer having a second metallization ratio. The metallization ratios range from 0.2 to 0.8, and the metallization ratio of the first transducer is no more than 0.8 times the metallization ratio of the second transducer. | 10-03-2013 |
20130293317 | DIRECTIONAL COUPLER - The invention relates to a directional coupler ( | 11-07-2013 |
20130335164 | FILTER ARRANGEMENT AND METHOD FOR PRODUCING A FILTER ARRANGEMENT - The invention relates to a filter arrangement ( | 12-19-2013 |
20130342079 | ELECTRONIC COMPONENT AND METHOD FOR PRODUCING THE ELECTRONIC COMPONENT - The invention relates to an electronic component having a layer sequence, which comprises at least a first electrode ( | 12-26-2013 |
20140035436 | COMPONENT OPERATING WITH ACOUSTIC WAVES AND METHOD FOR PRODUCING SAME - The invention concerns a component (B) operating with acoustic waves, in which the reflection and excitation are largely decoupled. For this purpose, a component comprises a dielectric (DL) which is arranged between an electrode finger (EF) and a piezoelectric substrate (PSU) and at least partially overlaps the electrode finger. | 02-06-2014 |
20140043113 | DUPLEXER WITH PHASE SHIFTER CIRCUIT - A duplexer comprising an improved matching circuit for matching between transmitting path and receiving path is specified. In this case, the matching circuit comprises a hybrid and matching elements. | 02-13-2014 |
20140049337 | AMPLIFIER MODULE - The invention relates to an amplifier module, comprising at least one amplifier (PA), an antenna port (ANT), a transmission port (TX), a reception port (RX), and a circuit arrangement having at least three 90 DEG hybrids (HYB | 02-20-2014 |
20140113574 | CIRCUIT ASSEMBLY - The present invention relates to a circuit assembly which comprises an antenna path (A | 04-24-2014 |
20140329475 | Front-end Circuit for Band Aggregation Modes - A front-end circuit for a wireless communication unit includes at least two antenna feeds. At least one of the antennas is coupled to an antenna switch. The circuit comprises filters and duplexers and is prepared to operate a number of FDD frequency bands. Each FDD band comprises an Rx band for receive signals and a Tx band for transmit signals. The circuit provides a single band operation mode for each frequency band and aggregated band operation modes. In an aggregated band operation mode Rx signals can be received in two different frequency bands at the same time as well as Tx signals can be transmitted in at least one of the two different frequency bands. In addition, TDD bands as well as GSM bands are covered. | 11-06-2014 |