Abstract: A filter device includes a filter between an input terminal and an output terminal, and an additional circuit connected in parallel with the filter between the input terminal and the output terminal. The additional circuit includes at least two longitudinally coupled resonators connected in parallel with each other and including longitudinally coupled resonators, and at least one capacitance element between the input terminal and the at least two longitudinally coupled resonators or between the output terminal and the at least two longitudinally coupled resonators. The average pitch of a plurality of electrode fingers of IDT electrodes of the longitudinally coupled resonator and the average pitch of a plurality of electrode fingers of IDT electrodes of the longitudinally coupled resonator are different from each other.

Abstract: A dielectric filter, a duplexer, and a communications device are provided. The dielectric filter includes a dielectric body, and a wideband filtering structure and a narrowband filtering structure that are disposed in the dielectric body. The wideband filtering structure includes a groove disposed on a first surface of the dielectric body and configured to adjust a frequency position of a passband of the wideband filtering structure; and at least one first resonator including a through hole penetrating the bottom of the groove and a second surface of the dielectric body; and an open loop located on a bottom surface of the groove and is disposed around an opening of the through hole. The narrowband filtering structure includes at least one second resonator including a blind hole disposed on the second surface of the dielectric body. The first surface and the second surface of the dielectric body are disposed oppositely.

Abstract: There are disclosed matrix filters having an input port and sub-filters connected between the input port and respective output ports. Each of the sub-filters includes a ladder circuit with n transversely-excited film bulk acoustic resonator (XBAR) series elements and n?1 capacitor shunt elements, where n, the order of the sub-filter, is an integer greater than 2. The sub-filters having noncontiguous passbands.

Abstract: There are disclosed acoustic filters and radios incorporating the acoustic filters. A filter includes a first filter port, a second filter port, and n sub-filters, where n is an integer greater than one. Each sub-filter has a first sub-filter port connected to the first filter port and a second sub-filter port connected to the second filter port. A first acoustic resonator is connected from the first filter port to ground, and a second acoustic resonator is connected from the second filter port to ground. The first and second acoustic resonators are configured to create respective transmission zeros adjacent to a lower edge of a passband of the filter.

Abstract: An electronic device includes a signal processor, a substrate, and a conductive housing. The signal processor includes an oscillator that outputs oscillation signal. The substrate has a ground component, the signal processor being disposed on the substrate. The conductive housing is connected to a first site of the ground component and to a second site that is different from the first site. The first site and the second site being disposed at positions where a first area of the housing in which an impedance is higher than a first threshold due to the first site overlaps at least part of a second area of the housing in which an impedance is lower than a second threshold due to the second site.

Abstract: A MoCA splitter device may include an input port, a first output port and a second output port, a first transmission line configured to connect the input port to the first output port, a second transmission line configured to connect the input port to the first output port, a first isolation element configured to connect the first transmission line to the second transmission line, a second isolation element configured to connecting the first transmission line to the second transmission line. The first isolation element and the second isolation element are configured to provide an isolation level between the first output port and the second output port that is less than a predetermined isolation level of about less than 16 dB in a MoCA frequency band.

Abstract: An apparatus includes an RF apparatus, and a multi-band matching balun coupled to the RF apparatus. The multi-band matching balun includes at least one three-element frequency-dependent resonator (TEFDR) and at most three reactive elements.

Abstract: Embodiments of a circuit, system, and method are disclosed. In an embodiment, a circuit includes first and second microstrip transmission lines. The first and second microstrip transmission lines include linearly arranged conductive strips on the circuit and a slotline formation extends between the first microstrip transmission line and the second microstrip transmission line so that the slotline formation is configured to electromagnetically couple the first microstrip transmission line to the second microstrip transmission line during operation of the circuit. In addition, the circuit includes at least one controllable capacitance circuit electrically connected to at least one of the first microstrip transmission line and the second microstrip transmission line, where a magnitude of a capacitance value of the at least one controllable capacitance circuit (e.g., including a barium strontium titanate (BST) capacitor) is controllable (e.g.

Abstract: There are disclosed acoustic diplexers and radios incorporating the acoustic diplexers. A diplexer includes common port, a low band port, a high band port, n low band sub-filters, and n high band sub-filters, where n is an integer greater than one. Each low band sub-filter has a first sub-filter port connected to the common port and a second sub-filter port connected to the low band port. Each high band sub-filter has a first sub-filter port connected to the common port and a second sub-filter port connected to the high band port. A first acoustic resonator is connected from the common port to ground and a second acoustic resonator is connected from the low band port to ground. The first and second acoustic resonators are configured to create respective transmission zeros adjacent to a lower edge of a passband of the diplexer.

Abstract: A radio frequency filter includes at least a first sub-filter and a second sub-filter connected in parallel between a first port and a second port. Each of the sub-filters has a piezoelectric plate having front and back surfaces, the back surface attached to a substrate, and portions of the piezoelectric plate forming diaphragms spanning respective cavities in the substrate. A conductor pattern is formed on the front surface of the plate, the conductor pattern includes interdigital transducers (IDTs) of a respective plurality of resonators, with interleaved fingers of each IDT disposed on a respective diaphragm of the plurality of diaphragms. A thickness of the portions of the piezoelectric plate of the first sub-filter is different from a thickness of the portions of the piezoelectric plate of the second sub-filter.

Abstract: In some embodiments, an apparatus includes a first layer having a first plurality of electrically conductive traces comprising a first portion of a plurality of hierarchical networks; a second layer having a second plurality of electrically conductive traces comprising a second portion of the plurality of hierarchical networks; and a plurality of vias electrically connecting the first plurality of electrically conductive traces of the first layer to the respective second plurality of electrically conductive traces of the second layer to define the plurality of hierarchical networks. The first plurality of electrically conductive traces is orientated in a first direction and the second plurality of electrically conductive traces is orientated in a second direction different from the first direction.

Abstract: The present disclosure provides a MEMS phase shifter and a manufacturing method thereof. The MEMS phase shifter includes a first substrate having a first surface, a coplanar waveguide on the first surface of the first substrate and including a first conductive wire and two second conductive wires on two sides of the first conductive wire and insulated from the first conductive wire, and a plurality of capacitance bridges on a side of the coplanar waveguide away from the first substrate. The plurality of capacitance bridges are arranged at intervals and insulated from the first conductive wire and the second conductive wire, and each of the plurality of capacitance bridges intersects the first conductive wire. The first surface of the first substrate includes a first groove, and the first conductive wire is suspended above the first groove.

Abstract: A Docsis-MoCA coupled line directional coupler includes an input port, an output port, a coupled port, and a termination port. A first track connects the input port to the output port and a second track, which may be substantially parallel to the first track, connects the termination port to the coupled port. The first track and the second track are configured to form a variable coupling length so as to control, for instance, an isolation level between the output port and the coupled port to be less than a predetermined isolation level in a MoCA frequency band.

Abstract: A power divider includes an input capacitor, and first and second transmission lines (TLs). The first TL includes an input portion (IP), a transmission portion (TP) and an output portion (OP). The second TL includes a TP and an OP. The IP is for receiving an input signal, and is connected to the TPs of the first and second TLs. For each of the first and second TLs, the TP has a length that is one-twelfth of a target wavelength, and is connected to the OP. The OPs of the first and second TLs are for cooperatively outputting a pair of output signals which are in-phase and each of which has a frequency equal to that of the input signal. The input capacitor is connected between ground and the IP.

Abstract: A filter module for reducing differential and common mode electrical noise may include at least a first electrically conductive busbar and a second electrically conductive busbar spaced apart from the first busbar, an at least partially electrically conductive housing at least partially enclosing the first busbar and the second busbar, at least a first common mode choke and a second common mode choke arranged in the housing and spaced apart from each other, at least a first bypass capacitor electrically connected to the first busbar and the second bus bar, at least a second bypass capacitor electrically connected to the first busbar and a midpoint, and at least a third bypass capacitor electrically connected to the second busbar and the midpoint.

Abstract: The present invention relates to use of an enhanced performance ultraconductive copper composite cylindrical conduit. The ultraconductive copper composite cylindrical conduit has enhanced RF conductivity.

Abstract: A power combiner/divider circuit can be structured having a base structure with the addition of an odd-mode capacitor and a low pass network at an end of the base structure or structured having a base structure with the addition of an inductor and a high pass network at an end of the base structure. The power combiner/divider circuit can be implemented as a port coupled to multiple ports with low pass networks or high pass networks arranged at the ends of paths to the multiple ports. In embodiments using low pass base structures or low pass networks coupled to the base structures, inductors in such low pass sections can be positively coupled on a pair-wise basis.

Abstract: An acoustic wave device includes a piezoelectric substrate including a piezoelectric layer made of lithium tantalate, an IDT electrode on the piezoelectric substrate, and a pair of reflectors on both sides of the IDT electrode on the piezoelectric substrate in an acoustic wave propagation direction. SH waves are used as a principal mode. The IDT electrode includes electrode fingers and the pair of reflectors each including electrode fingers. When a length along a direction orthogonal to a direction in which the electrode fingers extend is a width, each of the reflectors includes first and second electrode fingers having different widths. Four consecutive electrode fingers, which are any four of the electrode fingers of each of the reflectors, include both of the first and second electrode fingers and distances between centers of the four consecutive electrode fingers are equal or substantially equal.

Abstract: A filter device includes a common connection terminal, a first bandpass filter connected to the common connection terminal and including an inductor, and a second bandpass filter connected to the common connection terminal and having a pass band lower in frequency than a pass band of the first bandpass filter. The filter device uses SH waves. The first bandpass filter is a ladder filter. Each of series arm resonators and parallel arm resonators includes an interdigital transducer electrode. Of the parallel arm resonators of the first bandpass filter, the inductor is connected in series to the parallel arm resonator with a shortest electrode finger pitch of the interdigital transducer electrode.

Abstract: An apparatus that is a voltage-controlled splitting and/or switching apparatus comprising a waveguide for a radio frequency signal comprising at least one input and at least two outputs, wherein the waveguide is a cavity waveguide or a polymer microwave fiber waveguide, and the waveguide comprises at least a first branch and a second branch, at least one element comprising voltage reactive material in between electrodes and extending, at least partly, across at least one of the first branch and the second branch, and a voltage control caused to apply voltage to the at least one element.