A technology for a dual-common port multi-bandpass filter is described. The dual-common port multi-bandpass filter can include two or more analog filters. The dual-common port multi-bandpass filter can include a first common port coupled to an input of each of the two or more analog filters, where each analog filter can be configured to filter one or more frequency bands. The dual-common port multi-bandpass filter can include a second common port coupled to an output of each of the two or more analog filters. Each input of each of the two or more analog filters can be impedance matched with the first common port. Each output of each of the two or more analog filters can be impedance matched with the second common port.

An electronic component includes two or more first parallel resonators arranged in an orthogonal direction orthogonal or substantially orthogonal to a lamination direction, each first LC parallel resonator including a first inductor and a first capacitor, two second LC parallel resonators surrounding the two or more first LC parallel resonators from both sides in the orthogonal direction, each second LC parallel resonator including a second inductor and a second capacitor, a second capacitor connected to one end of the two second LC parallel resonators, and a first connecting conductor that connects two of the first LC parallel resonators that are not adjacent in the orthogonal direction, or connects one of the first LC parallel resonators and one of the second LC parallel resonators that are not adjacent in the orthogonal direction.

A band-pass filter includes five resonators. The five resonators are configured so that capacitive coupling is established between every two of the resonators adjacent to each other in circuit configuration. The first stage resonator and the fifth stage resonator are magnetically coupled to each other. The second stage resonator and the fourth stage resonator are capacitively coupled to each other. Each of the five resonators includes a resonator conductor portion. The respective resonator conductor portions of the first and fifth stage resonators are physically adjacent to each other. The respective resonator conductor portions of the second and fourth stage resonators are physically adjacent to each other. The respective resonator conductor portions of the first and second stage resonators are physically adjacent to each other. The respective resonator conductor portions of the fourth and fifth stage resonators are physically adjacent to each other.

A filtering switch based on dielectric resonator is disclosed which comprising a rectangular dielectric resonator, a metal cavity in which the dielectric resonator is located, a switch circuitry and a T-shape feeding line structure. The ON- and OFF-states of the filtering switch based on dielectric resonator are realized by controlling a coupling between the dielectric resonator and the feeding line structure. EM fields of the rectangular dielectric resonator and T-shape feeding line structure have been theoretically analyzed and utilized to guide the coupling control. The results have shown low ON-state loss, high power capability and high OFF-state isolation. Transmission zeros are generated at both sides of the passband by cross coupling between dielectric resonators or between feeding line structures and coupling line structures, resulting in high skirt selectivity.

A resonant unit and a filter, where the resonant unit includes a dielectric substrate, a metal microstrip disposed on a plane of the dielectric substrate, where the metal microstrip is used as a signal input/output port, and a defected ground structure disposed on another plane opposite to the plane of the dielectric substrate, where the defected ground structure includes a ground loop and an interdigital structure located inside the ground loop, the interdigital structure includes multiple fingers, and the ground loop or at least one finger in the interdigital structure includes at least one embedded interdigital structure. Harmonic suppression capabilities of the resonant unit and the filter can be improved, and an area can be reduced.

A bandstop filter includes a coupled line bandstop filter, a capacitor and a resistor. The coupled line bandstop filter includes a transmission line element and a shaped transmission line element. The shaped transmission line element includes a coupled line element disposed so as to electromagnetically couple with the transmission line element, and a second line element disposed so as not to be parallel with the transmission line element. The capacitor is electrically connected to the coupled line element. A portion of the received oscillating signal includes a bandstop frequency. Physical attributes of the coupled line bandstop filter, the capacitor and the resistor are such that the portion of the received oscillating signal including the bandstop frequency is attenuated.

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.

A technology for a dual-common port multi-bandpass filter is described. The dual-common port multi-bandpass filter can include two or more analog filters. The dual-common port multi-bandpass filter can include a first common port coupled to an input of each of the two or more analog filters. Each analog filter can be configured to filter one or more frequency bands. The dual-common port multi-bandpass filter can include a second common port coupled to an output of each of the two or more analog filters. Each input of each of the two or more analog filters is impedance matched with the first common port. Each output of each of the two or more analog filters is impedance matched with the second common port.

A semiconductor technology implemented high-frequency channelized filter includes a dielectric substrate with metal traces disposed on one of two major surfaces of the substrate. An input and output port disposed on the substrate and one of the metal traces carrying a high-frequency signal to be filtered between the input and output port. Other of the metal traces are connected to the one metal trace at intervals along the length of the one metal trace each providing a reactance to the high-frequency signal where the reactance varies with frequency and additional traces of the metal traces serving as a reference ground for the one metal trace and the other metal traces. A silicon enclosure mounted to the substrate with a first planar surface with cavities in the enclosure that extend through the first surface, and internal walls within the silicon enclosure defining the cavities. A layer of conductive metal covers the first planar surface, cavities and the internal walls. The silicon enclosure having substantially continuous areas of metal on the first planar surface about the periphery of the silicon enclosure that engage corresponding areas of the additional traces about the periphery of the substrate. The cavities surround the respective other metal traces with the internal cavity walls engaging the additional traces adjacent the respective other metal traces to individually surround each of the other metal traces with a conductive metal thereby providing electromagnetic field isolation between each of the other metal traces.

A filtering switch based on dielectric resonator is disclosed which comprising a rectangular dielectric resonator, a metal cavity in which the dielectric resonator is located, a switch circuitry and a T-shape feeding line structure. The ON- and OFF-states of the filtering switch based on dielectric resonator are realized by controlling a coupling between the dielectric resonator and the feeding line structure. EM fields of the rectangular dielectric resonator and T-shape feeding line structure have been theoretically analyzed and utilized to guide the coupling control. The results have shown low ON-state loss, high power capability and high OFF-state isolation. Transmission zeros are generated at both sides of the passband by cross coupling between dielectric resonators or between feeding line structures and coupling line structures, resulting in high skirt selectivity.