Multiplexing circuits with bulk acoustic wave (BAW) resonators as network elements for higher performance are provided. Multiplexing networks which support newer fourth generation (4G) and fifth generation (5G) standards may include a combination of multiplexers having a number of radio frequency (RF) filters connected to an antenna at the same time. One critical aspect of such a multiplexer design is the loading of these filters to each other, in which the static capacitance presented by a filter can be beneficial or detrimental to other filters in the multiplexing network. Aspects of the present disclosure introduce a BAW resonator to improve multiplexing network performance using the frequency-dependent capacitance, resonance, and/or anti-resonance of the BAW resonator.

A signal processing system includes: an interference source; and a band-stop filter. A first terminal of the band-stop filter is electrically connected to the interference source, a second terminal of the band-stop filter is grounded, and the band-stop filter is configured to filter a baseband signal output by the interference source. The interference source includes a first main board; or the interference source includes a target module and a metal frame used for fastening the target module, and the target module is a display module or a camera module.

Aspects of this disclosure relate to a multiplexer with a hybrid acoustic passive filter. The multiplexer includes a plurality of filters configured to filter respective radio frequency signals, a shared filter coupled between each of the plurality of filters and a common node, and a radio frequency filter coupled to the common node. At least a first filter of the plurality of filters includes acoustic resonators and a non-acoustic passive component. Related multiplexers, wireless communication devices, and methods are disclosed.

A filter includes a first resonance circuit including a first capacitor and a first inductor connected in parallel between a ground terminal and a first node electrically connected to a first signal terminal not through any capacitor, no inductor being connected in series with the first capacitor between the first node and the ground terminal, a second resonance circuit including a second capacitor and a second inductor connected in parallel between the ground terminal and a second node electrically connected to a second signal terminal not through any capacitor, and a third resonance circuit including a third capacitor and a third inductor connected in parallel between a third node, located in a path through which a high-frequency signal is transmitted between the first and second nodes, and the ground terminal, and a first series inductor connected in series with the third capacitor between the third node and the ground terminal.

A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.

A radio frequency (RF) filter circuit for rejecting one or more spurious components of an input signal has a first resonator circuit including a first capacitor and a first coupled inductor pair of a first inductor and a second inductor, and a second resonator circuit with a second capacitor and a second coupled inductor pair of a third inductor and a fourth inductor. First and second resonator coupling capacitors are connected to the first resonator circuit and the second resonator circuit. A first port and a second port are connected to the first resonator circuit and the second resonator, with the filtered signal of the input signal passed through both the first resonator circuit and the second resonator circuit being output.

An electronic device includes an IC mounted on a substrate and a filter circuit connected to the IC. The filter circuit includes a coil component and a capacitor. The coil component includes a multilayer body, a first coil including a portion of multiple wiring patterns laminated in the multilayer body, a second coil provided on layers different from those of the first coil and including a portion of the multiple wiring patterns, and first, second and third electrodes provided on side surfaces. An opening of the first coil is at least partially overlapped with an opening of the second coil when viewed from a main surface direction. The third electrode is grounded via the capacitor. The first coil has an inductance lower than that of the second coil.

An electronic component a multilayer body including insulation layers stacked in a stacking direction, a mounting surface that opposes a circuit board when the electronic component is mounted on the circuit board, first and second input/output terminals provided on the mounting surface and adjacent to each other, a ground terminal, a first filter circuit, in the multilayer body, electrically connected between the first input/output terminal and the second input/output terminal, and a ground conductor layer, provided between the first filter circuit and the mounting surface in the stacking direction, that overlaps with the first input/output terminal and the second input/output terminal when viewed in plan view from the stacking direction, and that is connected to the ground terminal.

The present disclosure provides circuits and methods for fabricating circuits. A circuit may include an insulator having a first surface, a second surface, a periphery, a first subset of circuit elements disposed on the first surface, a second subset of circuit elements disposed on the second surface, and at least one conductive sidewall disposed on the periphery, wherein the conductive sidewall electrically couples the first subset of circuit elements to the second subset of circuit elements.

A power dividing circuit includes a first transmission sub-circuit having an input port and a first resonant circuit, a second transmission sub-circuit having a second resonant circuit, and a third transmission sub-circuit having a third resonant circuit. A matching element is coupled between the second transmission sub-circuit and the third transmission sub-circuit. An input carrier signal is divided into a first signal to the second transmission sub-circuit and a second signal to the third transmission sub-circuit through the first transmission sub-circuit. The second resonant circuit and the third resonant circuit generate resonant frequency to reduce high frequency harmonics under a specific frequency range in the input carrier signal. A power divider is also provided.