Epcos Ag

Qorvo Us, Inc.

Snaptrack Incorporated

Andreas Link

Edgar Schmidhammer

Stephan Marksteiner

Bernhard Bader

Thomas Metzger

Markus Mayer

Christoph Eggs

Gudrun Henn

Habbo Heinze

Wolfgang Sauer

Gabriele Kolb

Rainer Braun

Loizos Loizou

Tobias Mangold

Aykut Cihangir

A module includes a protective shield with a three-dimensional (3D) pattern to increase a rate of heat dissipation. As circuit components get smaller in size, more circuit components can fit into a module, thereby increasing heat density in the module. Some of the heat in a module is conducted through an overmold disposed on the circuit components. The heat conducted through the overmold then dissipates through an optional protective shield on an exterior surface of the overmold. A rate of heat dissipation depends on the surface area of the overmold and, if any, the protective shield. In an exemplary aspect, a 3D pattern is formed in the exterior surface of the overmold to increase the surface area to increase a rate of heat dissipation from the module. Improved heat dissipation improves performance and product life of the circuit components in the module.

Three-dimensional patterned module exterior surface for improved heat dissipation and method of fabricating

A circuit having a power amplifier port, an antenna port, and a ladder network coupled between the power amplifier and antenna ports is disclosed. The ladder network includes a proximal series acoustic resonator coupled to the power amplifier port, a distal series acoustic resonator coupled to the antenna port, and at least one series acoustic resonator coupled between the proximal series acoustic resonator and the distal series acoustic resonator. A first shunt acoustic resonator is coupled between a fixed voltage node and the proximal series acoustic resonator and the at least one series acoustic resonator. A second shunt acoustic resonator is coupled between the fixed voltage node and a second node to which the at least one series acoustic resonator is also coupled. A first inductor is coupled in parallel with the proximal series acoustic resonator to create notches below and above a passband of the ladder network.

Circuit for suppressing signals adjacent to a passband

A multiplexer (MUL) having fewer intermodulation products is specified. For this purpose, the multiplexer (MUL) comprises a transmit and/or receive filter (Tx, Rx), which operates with acoustic waves, and blocker electrodes (EL, EL) for diverting undesired frequency components to ground (GND). The blocker electrodes (EL, EL) are arranged in this case on the same chip (CH) as the filter which operates with acoustic waves.

Multiplexer having fewer intermodulation products

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 (E, E) in a first electrically conductive layer and a third electrode (E) in a second electric layer. A dielectric layer (DL) is arranged between the electrically conductive layers. The first electrode (E) and the second electrode (E) are the terminal electrodes of the capacitor.

Capacitor having an improved linear behavior

A reactance filter includes a series branch that connects a signal input to a signal output. At least one parallel branch branches off from the series branch with respect to ground. A parallel resonator is arranged in each parallel branch. Two or more series resonators are connected in series in the series branch. A capacitor is connected in parallel with one of the series resonators in the series branch.

Reactance filter having a steep edge

A duplexer includes an antenna terminal, a transmission amplifier terminal and a reception amplifier terminal. The transmission amplifier terminal is coupled to the antenna terminal via a transmission filter. The reception amplifier terminal is coupled to a reception filter and the reception filter is coupled to the antenna terminal via a band-stop filter.

Duplexer and method for increasing the isolation between two filters

An antenna matching circuit includes at least two signal paths are connected to one antenna connection. The signal paths are designed to transmit and/or receive RF signals. A matching circuit includes a discrete line for phase shifting integrated at the antenna end in at least one of the signal paths. In this case, at least one of the capacitances contained in the discrete line is in the form of a micro-acoustic resonator, whose resonance is shifted sufficiently far that it is outside the pass band of the respective signal paths.

Antenna matching circuit

A microacoustic component includes an active layer and an electrode. The electrode includes a first metal layer facing the active layer, a second metal layer facing away from the active layer, and a third layer arranged between the first metal layer and the second metal layer. The third layer serves as a diffusion barrier.

Method for forming an electrode

A bulk acoustic wave filter of a ladder-type structure includes a series arm and at least a series arm resonator which is disposed in the series arm, such that the series arm is distributed in series arm sections between an input terminal and an output terminal. The bulk acoustic wave filter further includes a first parallel arm that includes a parallel arm resonator and an inductivity connected in series between the series arm and a reference terminal, and at least a second parallel arm that includes a parallel arm resonator. The first parallel arm and the at least one second parallel arm are connected in parallel between a common one of the series arm sections and the reference terminal.

Bulk acoustic wave filter of ladder-type structure

A resonator operating with bulk acoustic waves includes a resonator stack. The resonator stack includes a resonator area configured to allow propagation of an acoustic main mode and an acoustic secondary mode. The resonator stack also includes an acoustic mirror that includes a first partial mirror for locking in the acoustic main mode in the resonator area and a second partial mirror for locking in the secondary mode in a resonator space.

Growing community of inventors

Munich, Germany

Andreas Link