Abstract:
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.
Abstract:
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.
Abstract:
An absorber (1) for a thermal solar collector, comprising an absorber sheet (3) and at least one thermal fluid tube (5) that is connected in a thermally conducting fashion to the absorber sheet (3) and is connected to the absorber sheet (3) by means of a welded joint, is characterized in that the welded joint is formed from a number of linearly extended weld seam sections arranged sequentially along the thermal fluid tube (5) and respectively separated from one another by a section without weld seam, the direction of the linear extent of the weld seam sections corresponding to the axial direction of the extent of the thermal fluid tube.
Abstract:
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.
Abstract:
An absorber (1) is made available for a thermal solar collector comprising an absorber sheet (3) and at least one thermal fluid tube (5) that is connected in a thermally conducting fashion to the absorber sheet (3), has at least one bent section (2), and is connected to the absorber sheet (3) outside the bent section (2) via a continuous welded joint. The continuous welded joint (7, 8) is also present in the bent section (2) of the thermal fluid tube (5).
Abstract:
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.
Abstract:
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.
Abstract:
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.
Abstract:
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.
Abstract:
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.