Disclosed is a filter device comprising at least a shell, a first discoidal capacitor, a second discoidal capacitor, and an inductor. The shell is elongated in a stack direction. The first discoidal capacitor and the second discoidal capacitor are disposed within the shell, where the first discoidal capacitor is stacked above the second discoidal capacitor along the stack direction. The inductor comprises a first patterned conductive line disposed within the shell. The first patterned conductive line is coupled between the first discoidal capacitor and the second discoidal capacitor. The first patterned conductive line is wound in a winding direction traversing the stack direction.

Adaptions and improvements to coaxial metal powder filters include distributing a dissipative matrix mixture comprising superconductive material, metal powder, epoxy, and/or magnetic material within a volume defined by an outer tubular conductor and inner conductor. The frequency response of the filter may be tuned by exploiting the energy gap frequency of superconductive material in the dissipative matrix. The inner surface of the outer tubular conductor may be covered with a superconductive material. For a dissipative matrix comprising magnetic material or superconductive powder particles of a certain size, an external magnetic field can be applied to tune the frequency response of the filter.

Adaptions and improvements to coaxial metal powder filters include distributing a dissipative matrix mixture comprising superconductive material, metal powder, epoxy, and/or magnetic material within a volume defined by an outer tubular conductor and inner conductor. The frequency response of the filter may be tuned by exploiting the energy gap frequency of superconductive material in the dissipative matrix. The inner surface of the outer tubular conductor may be covered with a superconductive material. For a dissipative matrix comprising magnetic material or superconductive powder particles of a certain size, an external magnetic field can be applied to tune the frequency response of the filter.

An isolator includes a conditioning circuit configured to condition signals communicated therethrough. The isolator also includes a coupling member that includes an anti-rotation feature. The anti-rotation feature is configured to prevent the conditioning circuit from rotating with respect to the coupling member. The isolator also includes a coaxial circuit positioned around the coupling member. The coaxial circuit is configured to at partially attenuate direct current (DC) signals.

An isolator includes a conditioning circuit configured to condition signals communicated therethrough. The isolator also includes a coupling member that includes an anti-rotation feature. The anti-rotation feature is configured to prevent the conditioning circuit from rotating with respect to the coupling member. The isolator also includes a coaxial circuit positioned around the coupling member. The coaxial circuit is configured to at partially attenuate direct current (DC) signals.

In-line filters may include a tubular metallic housing defining a single inner cavity that extends along a longitudinal axis and a plurality of resonators that are spaced apart along the longitudinal axis within the single inner cavity, each resonator having a stalk. The stalks of first and second of the resonators that are adjacent each other are rotated to have different angular orientations.

In-line filters may include a tubular metallic housing defining a single inner cavity that extends along a longitudinal axis and a plurality of resonators that are spaced apart along the longitudinal axis within the single inner cavity, each resonator having a stalk. The stalks of first and second of the resonators that are adjacent each other are rotated to have different angular orientations.

An isolator includes an input connector configured to connect the isolator to a first device. The isolator also includes an output connector configured to connect the isolator to a second device. The isolator also includes a body including an outer shield. The isolator also includes a coupling member positioned at least partially within the outer shield. The coupling member is configured to electrically couple with the outer shield. The isolator also includes a coaxial circuit positioned at least partially around a first portion of the coupling member. The isolator also includes a toroid positioned at least partially around a second portion of the coupling member The isolator also includes a compression material configured to apply a force to the coaxial circuit and the toroid. The isolator also includes a signal conditioning circuit configured to condition signals communicated between the input connector and the output connector.

An isolator includes an input connector configured to connect the isolator to a first device. The isolator also includes an output connector configured to connect the isolator to a second device. The isolator also includes a body including an outer shield. The isolator also includes a coupling member positioned at least partially within the outer shield. The coupling member is configured to electrically couple with the outer shield. The isolator also includes a coaxial circuit positioned at least partially around a first portion of the coupling member. The isolator also includes a toroid positioned at least partially around a second portion of the coupling member The isolator also includes a compression material configured to apply a force to the coaxial circuit and the toroid. The isolator also includes a signal conditioning circuit configured to condition signals communicated between the input connector and the output connector.

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.