Abstract: A reconfigurable multiplexer comprises a plurality of filter and/or duplexers, which are respectively associated with a frequency band and can be connected to an antenna connector via a band switch each optionally individually or several at the same time. With variable phase shifters, the adjustment of a suitable phasing of a filter or duplexer during a multiplex mode is possible. In order to improve the interband insulation in a given multiplex mode, a variable notch can be connected to one of the filters or partial filters of a duplexer.

Abstract: A passive on glass (POG) on filter capping apparatus may include an acoustic filter die. The apparatus may further include a capping die electrically coupled to the acoustic filter die. The capping die may include a 3D inductor.

Abstract: A front end circuit is disclosed. In an embodiment, the circuit includes a first antenna connection and first to third signal paths, each of which include a tunable filter and each of which is connected to the first antenna connection. The circuit further includes at least one phase shifter arranged in at least one of the signal paths between a respective filter and the first antenna connection and a control circuit configured to tune frequency bands of the filters, wherein the filters are operable in a FDD operating mode or a TDD operating mode, and wherein the front-end circuit is simultaneous operable in at least one transmission band and at least one reception band using all three filters and the associated signal paths.

Abstract: A duplexer and a quadplexer are disclosed. In an embodiment, the duplexer includes an antenna terminal and two sub-paths including a transmit path and a receive path, the two sub-paths being connected to the antenna terminal, wherein the transmit path includes serially interconnected series resonators and, in parallel therewith, n parallel paths connected to ground, wherein each parallel path includes one parallel resonator or a cascade of serially interconnected parallel resonators, wherein n is an integral number with 0<n<8, wherein at least one of the n parallel resonators is connected to ground in series with an inductance in the transmit path, and wherein a parallel resonator is connected directly to ground in a first parallel path that is nearest to the antenna terminal and no inductance is arranged in the first parallel path.

Abstract: A tunable RF filter circuit (AHF) is specified which enables good electrical properties, good tunability and simple driving despite low complexity. In this case, the filter circuit comprises a first and a second signal route (SW1, SW2) in a signal path (E, A). At least three resonant circuits (RK1, RK2, RK3) are arranged one after another in the second signal route and interconnect the second signal route with ground. The resonant circuits are electrically and/or magnetically coupled (K) and each comprise a tunable impedance element. The second signal route contains an impedance element (IMP).

Abstract: A resonator circuit, a filter with improved tunability, and a duplexer with improved tunability are disclosed. In an embodiment, the resonator circuit includes a resonator, a Z transformer and an impedance circuit, wherein the impedance circuit has an impedance Z and includes an impedance element, wherein the Z transformer is interconnected between the resonator and the impedance circuit, and wherein the Z transformer transforms the impedance Z to a new impedance Z??Z and comprises a transformation circuit selected from: a generalized impedance converter (GIC), an negative impedance converter (NIC), a generalized impedance inverter (GII) and an negative impedance inverter (NII).

Abstract: An HF circuit is specified, by means of which carrier aggregation is possible with a simple design. The circuit comprises a duplexer, a further filter, and two phase shifters, and can be used in an HF module of a mobile wireless device.

Abstract: Certain aspects of the present disclosure are generally directed to an integrated circuit device. The integrated circuit device generally includes a capacitive element, a first switch having a first terminal coupled to a first terminal of a capacitive element, and a second switch coupled between the first terminal and a second terminal of the capacitive element in the integrated circuit device.

Abstract: A package for a tunable filter is disclosed. In an embodiment, the tunable filter includes a substrate having a first interconnection plane and a semiconductor device assembled on the substrate in a first component plane, the semiconductor device electrically connected to the first interconnection plane and containing tunable passive components. The filter further includes a control unit arranged in the first component plane, a dielectric layer arranged above the first component plane, a second component plane arranged on the dielectric layer and discrete passive devices arranged in the second component plane and interconnected with the semiconductor device, wherein the tunable passive components are tunable by the control unit.

Abstract: A tunable duplexer is specified is disclosed. In an embodiment, the duplexer includes a transmission port, a reception port, a common port and a core having a first inductive element and a second inductive element. The duplexer further includes a first signal path electrically connecting the transmission port to the core, a second signal path electrically connecting the reception port to the core and a third signal path electrically connecting the common port to the core. A first tunable capacitive element electrically connects the first signal path to ground and a second tunable capacitive element electrically connects the second signal path to ground, wherein the first inductive element and the second inductive element are inductively and conductively coupled to one another.

Abstract: The invention relates to an HF module, the filter functionality of which can easily be expanded and which has good electrical properties. For this purpose, the module comprises two filter units with a respective HF filter and a switch having two possible switching states. The two filter units are connected in parallel.

Abstract: An HF circuit is specified, by means of which carrier aggregation is possible with a simple design. The circuit comprises a duplexer, a further filter, and two phase shifters, and can be used in an HF module of a mobile wireless device.

Abstract: The present invention concerns a front end circuit (1) which comprising a first tunable duplexer (5) comprising a first tunable RX bandpass filter (9) and a first tunable TX bandpass filter (10), wherein the first tunable duplexer (5) is configured to support a first FDD mode in a first FDD frequency band and a first TDD mode in a first TDD frequency band. Furthermore, the present invention concerns a method of operating the front end circuit.

Abstract: A mobile communication device includes an antenna and a transceiver circuit having a first port for transmitting first RF signals and a second port for transmitting second RF signals. The second RF signals are different than the first RF signals. A single RF filter is electrically connected between the antenna and the transceiver circuit. The RF filter has an antenna port coupled to the antenna and a transceiver port coupled to the transceiver circuit. The transceiver port of the RF filter is coupled to the first port and to the second port of the transceiver circuit.

Abstract: A circuit arrangement includes an antenna port, a first receiving port, a second receiving port, a first transmission port, and a second transmission port. A number of 90 degree hybrids are configured to transfer an input signal into two output signals that are phase shifted relative to each other. Two quadplexers each include a first duplexer and a second duplexer. The quadplexers and the 90 degree hybrids are interconnected such that a leakage signal travelling from one of the transmission ports to one of the receiving ports destructively interferes at the receiving port.

Abstract: The invention relates to an HF circuit, for example for use in front-end circuits, having improved signal quality in carrier aggregation. According to the invention, a signal path between a duplexer and a diplexer comprises a phase shifter.

Abstract: A front-end circuit with a tunable filter is disclosed. In an embodiment, the front end circuit includes a first signal path connected to an antenna connection, a first filter arranged in the first signal path, wherein the first filter is tunable within a first frequency range, and an extra signal path and a first fixed filter arranged therein, wherein the first fixed filter has a passband for an extra frequency band, wherein the first fixed filter is not tunable, and wherein the extra frequency band is arranged outside or inside the first frequency range. The front end circuit further includes a narrowband antenna tuner configured to be set to a respective tunable frequency range, wherein the narrowband antenna tuner is arranged between the first filter, the first fixed filter and the antenna connection in the first and second signal paths.

Abstract: A capacitor having improved linear properties is provided. The capacitor is compatible with manufacturing processes of components which function using BAW. The capacitor comprises a first and a second electrode (E1, E2) in a first electrically conductive layer and a third electrode (E3) in a second electric layer. A dielectric layer (DL) is arranged between the electrically conductive layers. The first electrode (E1) and the second electrode (E2) are the terminal electrodes of the capacitor.

Abstract: The invention relates to an HF module, the filter functionality of which can easily be expanded and which has good electrical properties. For this purpose, the module comprises two filter units with a respective HF filter and a switch having two possible switching states. The two filter units are connected in parallel.

Abstract: The specification relates to an RF filter in which characteristic filter variables have a decreased dependency on tuning. A filter in this case comprises series-interconnected basic elements that each have an electroacoustic resonator and impedance converters interconnected in series between the basic elements.