Abstract: A mixed-mode cavity filter is disclosed. The disclosed cavity filter includes: at least one first cavity configured to hold a metal coaxial resonator; and at least one second cavity configured to hold a dielectric resonator, where a first coupling window is formed in a wall formed between the first cavity and the second cavity, the first coupling window includes a horizontal window formed parallel to a bottom portion and a vertical window formed perpendicularly to the bottom portion, and the horizontal window and the vertical window overlap each other in at least a partial area. A mixed-mode filter according to an embodiment of the invention can achieve a small size and a light weight while providing low losses.

Abstract: A conductor is formed of a first portion to define a first area in a plane that is substantially perpendicular to a first magnetic field direction in a first cavity resonator and a second portion to define a second area in a plane that is substantially perpendicular to a second magnetic field direction in a second cavity resonator. Inductive current generated in the first portion flows in substantially the same direction as current in the second portion. The conductor may be deployed in an aperture between the first and second cavity resonators to couple or cross-couple the first and second cavity resonators. The conductor may also be deployed to couple or cross-couple cavity resonators in a filter implemented in a broadcast- or base station.

Abstract: Apparatus and method for a radially attachable RF trap attached from a side to a shielded RF cable. In some embodiments, the RF trap creates a high impedance on the outer shield of the RF cable at a frequency of RF signals carried on at least one inner conductor of the cable. In some embodiments, an RF-trap apparatus for blocking stray signals on a shielded RF cable that has a peripheral shield conductor and a inner conductor for carrying RF signals includes: a case; an LC circuit having a resonance frequency equal to RF signals carried on the inner conductor; projections that pierce and connect the LC circuit to the shield conductor; and an attachment device that holds the case to the cable with the LC circuit electrically connected to the shield conductor of the shielded RF cable.

Abstract: Various disclosed aspects provide for protecting components (e.g., integrated circuits) from spurious electrical overvoltage events, such as electrostatic discharge. Embedded components with voltage switchable dielectric materials may protect circuits against electrostatic discharge.

Abstract: A method for independently tuning bandwidth and center frequencies in a bandpass filter. The filter can be configured with a plurality of resonators, wherein the resonators are coupled over a certain coupling region. Additionally, the filter can be configured with a plurality of tuning elements. For each of the inter-resonator couplings, at least one of the resonators associated with the inter-resonator coupling can have a first tuning element placed at a first location on the resonator and a second tuning element placed at a second location on the resonator. Simultaneously tuning the first and second tuning elements can adjust the center frequency, and offset tuning the first and second tuning elements can adjust the bandwidth frequency.

Abstract: In accordance with an embodiment, a radio-frequency (RF) front-end for a radio configured to receive an RF signal at a first frequency includes an antenna port configured to be coupled to an antenna, and a notch filter having an input coupled to the antenna port. The notch filter is configured to reject one or more frequencies, such that the first frequency is a harmonic or intermodulation distortion product of the one or more frequencies. The RF front-end also includes a piezoelectric filter having an input coupled to an output of the notch filter and an output configured to be coupled to an RF amplifier. The piezoelectric filter has a pass band comprising the first frequency.

Abstract: An embodiment of the invention provides a passive device cell. The passive device cell has a substrate layer, a passive device, and an intermediary layer formed between the substrate layer and the passive device. The intermediary layer includes a plurality of LC resonators.

Abstract: A connector having a conductively coated member is provided, wherein the connector comprises a connector body capable of sealing and securing a coaxial cable, and further wherein the conductively coated member, such as an O-ring, physically seals the connector, electrically couples the connector and the coaxial cable, facilitates grounding through the connector, and renders an electromagnetic shield preventing ingress of unwanted environmental noise.

Abstract: A tunable interference filter comprising a first substrate, a second substrate facing the first substrate, a first reflection film formed on the first substrate, a second reflection film formed on the second substrate, the second reflection film facing the first reflection film by interposing a gap, and a gap adjustable-part that adjusts the gap, wherein the second substrate has a first surface and a second surface opposed to the first surface, wherein the second substrate includes a first groove on the first surface, and wherein the second substrate includes a second groove on the second surface, the second groove facing the first groove.

Abstract: A dual mode filter (200, 500, 900) comprising an input (Pin) and an output port (Pout) and a non-conducting substrate (205, 505), and first (215, 510, 902) and second (210, 540, 901) conductors which connect the input port to the output port. The conductors are arranged on or in the substrate, and the first conductor is longer than the second conductor by 50%. Either the first or the second conductor comprises a perturbation element (208, 530, 915) at a central position. The first conductor is arranged between the input port and the output port with a number of sections (216-222; 511-519; 931-933, 936-938), at least some of which are parallel to each other, and arranged so that the current in a section which has one or more other sections in parallel to it always flows in the same direction as the current in the most adjacent of said other sections.

Abstract: A coaxial resonator includes a first outer conductor connected to a reference potential; a dielectric block which is provided with a through hole formed so as to pass therethrough from a first side surface to a second side surface opposed to the first side surface, and is so disposed that a first main surface abuts on the first outer conductor; an inner conductor disposed in an inside of the through hole; and a second outer conductor which is shaped like a rectangular box having its one face which is opened toward the first outer conductor, the second outer conductor having an inside dimension such that the dielectric block can be housed therein so as to be spaced from its second main surface, third side surface, and fourth side surface, and being connected to the reference potential.

Abstract: An electrical filter for filtering an electrical signal, the filter having a transmission characteristic comprising a band edge at a band edge transition frequency, the filter comprising a circulator having a first circulator port for receiving a signal to be filtered, the circulator being adapted to transfer a signal received at the first circulator port to a second circulator port and being further adapted to transfer a signal received at the second circulator port to a third circulator port; and, a reflection mode filter connected to the second port; the reflection mode filter comprising a filter network comprising at least one resonator, the filter network having a network input connected to the second circulator port; and, a further resonator connected to the network input, the further resonator being arranged to provide an extracted pole providing a transmission zero closest to the band edge transition frequency; wherein the further resonator has a high Q compared to the low Q of at least one of the at

Abstract: A cavity filter device includes a micro-strip structure comprising a low dielectric organic material forming a printed wiring board. The printed wiring board may be soldered, welded, or adhered to the base of one or more cavity filters. The cavity filter may include a coupling pin such as a RF pin positioned at the base of the filter. The micro-strip structure may be configured to carry a RF signal from the input, across the micro-strip structure to the RF pin positioned at the base of the filter.

Abstract: A structure and method for adjusting the bandwidth of a ceramic waveguide filter comprising, in one embodiment, a monoblock of dielectric ceramic material defining respective steps and respective input/output through-holes extending through the monoblock and the respective steps. In one embodiment, the steps are defined by notches in the monoblock and the input/output through-holes define openings terminating in the notch. The bandwidth of the ceramic waveguide filter may be adjusted by adjusting the height/thickness and direction of the steps relative to an exterior surface of the monoblock and/or the diameter of the input/output through-holes.

Abstract: A signal path for a small signal oscillating at a frequency of at least 20 GHz occurring in a magnetic resonance system has a signal source generating the small signal and a signal sink processing the small signal. The small signal is transmitted on a path from the signal source to the signal sink at least in a part section via a cable. The part section of the signal path, in which the small signal is transmitted via the cable, is embodied at least partly as a dielectric waveguide. The dielectric waveguide is disposed at least partly within an examination volume of the magnetic resonance system. The dielectric waveguide is delimited on a source side by a source-side mode converter and on a sink side, by a sink-side mode converter. The small signal is supplied to the source-side mode converter via a source-side electrical conductor and injected by the sink-side mode converter into a sink-side electrical conductor.

Abstract: The invention relates to an adjustable resonator filter, which has a casing made up of a bottom, walls and a lid, which casing functions as a ground for a transmission path, which is divided with conductive partitions into resonator cavities, and on the transmission path of the resonator filter there is a coupling opening in the partitions separating subsequent cavities. In the casing there is by at least one partition a coupling space, which is open into both resonator cavities separated by the partition, which resonator filter has an inductive coupling member. This is arranged to extend through said coupling space into both resonator cavities. The inductive coupling member is in electric contact with the casing at least in one of the resonator cavities. In the coupling space there is a moveable conductive adjustment piece, which has a minimum position for the coupling and a maximum position for the coupling.

Abstract: [OBJECT] It is an object to provide a dielectric waveguide filter with attenuation poles, which is capable of suppressing deterioration in a high band-side attenuation characteristic with respect to a low band-side attenuation characteristic. [SOLUTION] A dielectric waveguide filter comprises a plurality of dielectric waveguide resonators each having a rectangular parallelepiped-shaped dielectric block, periphery of which is covered by a conductor film. The dielectric waveguide resonators are configured to form a main coupling path, and a sub coupling path bypassing a part of the main coupling path. The part of the main coupling path bypassed by the sub coupling path includes at least one capacitive coupling path.

Abstract: A system including a first dielectric filter including a plurality of resonators, a second dielectric filter including a plurality of resonators, and a hollow waveguide configured to receive the first dielectric filter or the second dielectric filter by separating the hollow waveguide into at least a first part and a second part. A width of the plurality of resonators matches a width of a groove within the hollow waveguide to allow insertion of the first dielectric filter or the second dielectric filter into the hollow waveguide where sides of the resonators are in contact with inner sides of the groove of the hollow waveguide. Another embodiment of a system and a method are also disclosed.

Abstract: The present invention relates to a resonator and discloses a transverse magnetic mode dielectric resonator, a transverse magnetic mode dielectric filter, and a base station. By using the present invention, good contact between contact surfaces and convenient assembly can be achieved. Moreover, the transverse magnetic mode dielectric resonator according to the embodiments of the present invention has good structure stability, convenient assembly, and strong realizability, thereby being suitable for mass production and having good mass production consistency.

Abstract: A three dimensional (3D) branchline coupler using through silicon vias (TSV), methods of manufacturing the same and design structures are disclosed. The method includes forming a first waveguide structure in a first dielectric material. The method further includes forming a second waveguide structure in a second dielectric material. The method further includes forming through silicon vias through a substrate formed between the first dielectric material and the second dielectric material, which connects the first waveguide structure to the second waveguide structure.

Abstract: An electrical signal filter defined by a block of dielectric material with a top surface, a bottom surface, side surfaces, and through-holes extending between the top and bottom surfaces. In one embodiment, first and second walls protrude outwardly from the top surface and extend the length of first and second opposed longitudinally extending side surfaces. A surface-layer pattern of metallized and unmetallized areas is defined on selected surfaces of the block including an area of metallization that covers the top surface. In one embodiment, first and second surface-layer input/output electrodes are defined by first and second respective isolated strips of conductive material that extend from the top surface of the block and onto the first and second walls respectively.

Abstract: A transceiver includes a local oscillation module, a transmitter section, and a receiver section. The local oscillation module is operable to generate a transmit local oscillation and a receive oscillation. The transmitter section includes a transmit mixing module and a transmit weaved connection that is operable to high frequency filter the transmit location oscillation. The transmit mixing module mixes the filtered transmit location oscillation with a transmit signal to produce an up-converted signal. The receiver section includes a receive mixing module and a receive weaved connection that is operable to high frequency filter the receive location oscillation. The receive mixing module mixes the filtered receive location oscillation with an RF received signal to produce a down-converted signal.

Abstract: An RF filter assembly comprising two filters. In one embodiment, the RF filter assembly comprises a core of dielectric material including a plurality of through-holes and a surface-layer pattern of conductive areas on a top surface of the core that define a first RF filter and a second RF low pass filter is defined, and extends between respective conductive input/output electrodes, on a wall that protrudes outwardly and upwardly from a top surface of the RF filter assembly.

Abstract: A duplex filter includes a block of dielectric material with top, bottom, and side surfaces and first and second spaced-apart sets of through-holes. A pair of outside walls and a center wall extend outwardly from the top surface. A pattern of metallized areas is defined on the top surface of the block including first and second electrodes that extend on the pair of outside walls respectively and third and fourth electrode antennae that extend on the center wall. The block may be two separate blocks coupled together to form an interior layer of metallization separating the first and second sets of through-holes and the center wall separates respective transmit and receive portions of the pattern of metallized areas.

Abstract: A dielectric filter includes a receiving member with a plurality of receiving spaces and a cover. The cover is arranged to cover the receiving spaces in the receiving member. Each receiving space of the plurality of receiving spaces includes a rectangular cavity with a dielectric.

Abstract: An apparatus to filter electromagnetic waves includes a cavity and one or more tuning circuits. The cavity is configured to receive the electromagnetic waves and has a resonant frequency. The one or more tuning circuits are disposed proximate to or in the cavity. The one or more tuning circuits and the cavity are configured to filter the electromagnetic waves and the resonant frequency of the cavity is based on the one or more tuning circuits.

Abstract: Provided is a radio frequency (RF) cavity filter including a tuning bolt holding member, the RF cavity filter including a top block, a bottom block to form a cavity along with the top block, a resonator disposed in the cavity, a tuning bolt to penetrate through the top block, and a tuning bolt holding member disposed to be in contact with one end of the tuning bolt to hold the tuning bolt, which may fix a position of the tuning bolt.

Abstract: An RF bandpass filter includes a cascaded series of a first subfilter and a second subfilter. Each subfilter includes a respective inverter, voltage-controlled capacitor and inductor. A first selected one of the first subfilter and the second subfilter is a pseudo low pass filter and a second selected one of the first subfilter and the second subfilter is a pseudo high pass filter. The RF bandpass filter is configured to separately control a bandwidth and center frequency of output RF energy. The bandwidth may be controlled to be substantially fixed over a significant substantial range. The center frequency and bandwidth are controlled by adjusting a voltage input to one or more of the voltage-controlled capacitors.

Abstract: The invention relates to a dielectric resonator rod in a transverse magnetic mode radio frequency filter comprising a first cylindrical end part (10) of a first diameter (D1) and a second cylindrical end part (20) of a second diameter (D2). The first diameter is different than the second diameter and the first cylindrical end part (10) is connected via a third intermediate part (30) to the second cylindrical end part (20). The third intermediate part (30) comprises a tapered outer circumferential surface connecting the first cylindrical end part (10) to the second cylindrical end part (20).

Abstract: The disclosure relates to a harmonic oscillator and a preparation method thereof, a filtering device and an electromagnetic wave device. The harmonic oscillator includes at least one dielectric slab and response units attached on one surface of the at least one dielectric slab, where the response units are structures manufactured by conductive material and provided with geometric patterns. According to the technical solution of the disclosure, the filtering device and the electromagnetic wave device with the harmonic oscillator are good in structure stability. Swinging of a harmonic oscillator sheet layer is low in loss. The Q value of the harmonic oscillator prepared by the disclosure is high; and loss of a resonant cavity, the filtering device and a microwave device with the harmonic oscillator is obviously reduced.

Abstract: Tunable radio frequency (RF) devices, such as phase shifters and filters, are formed by depositing thin film layers on a substrate and patterning the thin film layers by various lithography techniques. A thin film metal layer is patterned to form a plurality of capacitors and inductors, leaving at least two grounding regions that lie closely adjacent the capacitors and inductors. As patterned portions of the grounding regions are electrically isolated from each other. Performance of the devices are improved by electrically bridging the differential potential grounding regions.

Abstract: A radio frequency (RF) filter includes an input port configured to receive a signal, an output port configured to output a signal, and a tuning probe configured to be movable within a tuning probe port to adjust filter characteristics. The tuning probe port is configured to receive the tuning probe therein, and a locking mechanism is configured to lock the tuning probe in the tuning probe port at a desired depth and further configured to prevent movement of the tuning probe in the tuning probe port when the locking mechanism is in a locked configuration.

Abstract: Disclosed is a variable bandwidth RF filter. The disclosed filter comprises: a first filter unit having a first bandwidth and a variable-frequency structure; and a second filter unit having a second bandwidth and a variable-frequency structure. The first filter unit and the second filter unit are coupled to a cascade structure, and the bandwidth is adjusted by varying the frequency of the first filter unit and of the second filter unit. The disclosed filter is advantageous in that the variation of the bandwidth can be easily performed using a simple structure.

Abstract: A filtering apparatus includes a passband of a first-level unit which is formed by at least three coaxial filters covers a passband of a second-level unit which is formed by at least three dielectric filters, and a bandwidth of the first-level unit is twice the bandwidth of the second-level unit, so that when the coaxial filters are coupled to the dielectric filters, insertion loss of the coaxial filters is reduced, thereby reducing overall insertion loss of the filtering apparatus. By making a transmission zero of the first-level unit be located at a second harmonic frequency point of the second-level unit, the filtering apparatus can have high suppression on a second harmonic, thereby obtaining relatively desirable far-end suppression performance.

Abstract: A superconducting filter device of an embodiment includes: a high-frequency filter includes a superconducting element, and a dielectric member; and a drive tool configured to adjust a distance between the superconducting element and the dielectric member. The dielectric member and the drive tool take both a connection state and a separation state.

Abstract: A coaxial resonator includes a dielectric block; a first inner conductor disposed in an inner surface of a first through hole which extends from a first main surface of the dielectric block to an opposite second main surface thereof, the first inner conductor being connected to a reference potential at one side thereof; and an outer conductor disposed over side surfaces of the dielectric block, the outer conductor surrounding the first inner conductor, the outer conductor being connected to the reference potential. There is a low-dielectric-constant portion in a location between the first inner conductor and the outer conductor. The low-dielectric-constant portion surrounds a periphery of the first inner conductor and is lower in dielectric constant than the dielectric block.

Abstract: A dual mode dielectric resonator (DR) filter has a first DR, and is configured to operate at a HE12? mode within a first frequency band while exhibiting a Q factor of no less than 5000. A first characteristic size of the first DR may be substantially similar to a size of a second DR, where the second DR is configured to operate in a conventional DR filter at a HE11? mode within a second frequency band, the second frequency band being substantially lower than the first frequency band.

Abstract: RF communications circuitry includes an RF filter structure, which includes a group of resonators, a group of cross-coupling capacitive structures, and a group of egress/ingress capacitive structures, is disclosed. Each of the group of cross-coupling capacitive structures is coupled between two of the group of resonators. A first portion of the group of egress/ingress capacitive structures is coupled between a first connection node and the group of resonators. A second portion of the group of egress/ingress capacitive structures is coupled between a second connection node and the group of resonators.

Abstract: A cavity filter having a piezoelectric tuning element is tuned by determining a desired oscillating frequency for the piezoelectric tuning element and applying that frequency through a phase-locked loop. The phase-locked loop maintains the piezoelectric tuning element at the desired frequency.

Abstract: An artificial dielectric resonator that can enhance a relative dielectric constant in a basic mode is provided. The artificial dielectric resonator 1 has a first series metal strip group 2 including a plurality of metal strips 20 each in a thin sheet shape arranged with microscopic gaps 20G provided in a longitudinal direction, and a second series metal strip group 3 including a plurality of metal strips 30 each in a thin sheet shape arranged with microscopic gaps 30G provided in a longitudinal direction, the first series metal strip group 2 and the second series metal strip group 3 are disposed close to each other in a thickness direction of the metal strips 20 and 30, and the metal strip 20 or 30 of one metal strip group 2 or 3 is disposed to face and cross gap 30G or 20G of the other metal strip group 3 or 2.

Abstract: A spin wave device according to an embodiment includes: an input interconnect transmitting an input impulse signal; a multilayer film including a foundation layer; a first magnetic layer formed on the multilayer film and generating spin waves when receiving the input impulse signal, the spin waves propagating through the first magnetic layer; a plurality of input electrodes arranged in a straight line on the first magnetic layer, being connected to the input interconnect, and transmitting the input impulse signal to the first magnetic layer; and a plurality of sensing electrodes sensing the spin waves, being arranged on the first magnetic layer, and being located at different distances from one another from the straight line having the input electrodes arranged therein, and the following equation is satisfied: d=Vg×t0.

Abstract: A waveguide filter, comprising a housing defining a passage through which electromagnetic waves can travel and a plurality of adjustable projections extending through the housing into the passage. The passage is absent any fixed protrusions. The plurality of adjustable projection s comprises a set of coupling projections, wherein each pair of adjacent coupling projections in the set of coupling projections defines there between a resonant cavity. Each coupling projection in the set of coupling projections acts as a coupling element for at least one resonant cavity and is adjustable for trimming the coupling of that at least one resonant cavity. The plurality of adjustable projections further comprises a set of tuning projections, wherein a tuning projection from the set of tuning projections is positioned between each pair of adjacent coupling projections and is adjustable for trimming a resonance frequency of an associated resonant cavity.

Abstract: A terahertz band filter for filtering, in a frequency band, a terahertz wave propagating between a pair of metal plates with an upper parallel surface facing a lower parallel surface includes a sheet parallel to the upper and lower parallel surfaces, which is disposed between the metal plates and is spaced apart therefrom, and at least one slit located in the sheet to face the upper and lower parallel surfaces, wherein the sheet comprises a single slit to function as a notch filter for blocking in a specific frequency band.

Abstract: This disclosure relates generally to radio frequency (RF) filter structures. In one embodiment, an RF filter structure includes a first resonator and a second resonator. The second resonator is operably associated with the first resonator such that an energy transfer factor between the first resonator and the second resonator is less than 10%. The first resonator includes a first inductor and a first capacitive structure electrically connected to the first inductor, while the second resonator has a second inductor and a second capacitive structure electrically connected to the second inductor. A displacement between the first inductor and the second inductor is less than or equal to half a maximum lateral width of the second inductor. To set an electric coupling coefficient, a first cross-coupling capacitive structure is electrically connected between the first resonator and the second resonator.

Abstract: Several implementations disclosed herein are directed to compact-size common-mode filters that are suitable for implementation in densely populated multilayered printed circuit boards (PCBs) with numerous I/O ports—as well as integrated circuit (IC) chips and I/O connectors—to suppress EMI emissions. Certain implementation are specifically directed to filters for four differential signal lines that carry 10-Gb/s digital signals. These implementations provide common-mode suppression within gigahertz frequencies where common-mode noise comprising 10-Gb/s signal is problematic, but without any significant degradation of differential-mode signals. Moreover, certain of these implementations are directed to compact-size filters that suppress common-mode signal noise at 10.3 GHz associated with the fundamental harmonic 10 Gb/s-signals of XFI and SFI. In other implementations, a combination of filters is presented to provide common-mode noise suppression at both the first harmonic frequency of 10.

Abstract: A multi-cavity RF filter has at least one electrically conductive coupling probe disposed between two resonator cavities. The coupling probe is provided with an ESD protective arrangement such that the coupling probe is electrically connected to a metallic housing of the RF filter only by the ESD protective arrangement. The ESD protective arrangement is configured to provide (i) a low resistance electrical path from the coupling probe to the metallic housing and (ii) a high impedance to RF energy having wavelengths proximate to a center frequency wavelength of the RF filter.

Abstract: A microwave filter has a housing defining an inner cavity. A first resonator is positioned in a first portion of the inner cavity. A second resonator is positioned in a second portion of the inner cavity. A third resonator is positioned in a third portion of the inner cavity. The first resonator and the third resonator are cross-coupled via an iris. The second resonator is elongated and is coupled to the first resonator and the third resonator. The resulting microwave filter has a frequency response having a transmission zero in the lower stopband. A high-pass filter is realized without the use of a cross-coupling probe.

Abstract: Based on an active low-pass filter structure comprising a main conductor line between an input port and an output port, consisting of an input conductor section, an output conductor section, and an inductance network in series between the input and output sections, the inductance network being coupled to the LC resonators, an LC resonator connected to each junction point between two network inductances, and at least one negative resistance in series with one of the resonators, a dual response filter is formed by providing an auxiliary conductor line, wherein an input end of the filter is connected to an electrical ground, forming a resonator with its own resonant frequency less than the cut-off frequency fc of the low-pass filter, the auxiliary line extending from this end along and away from the main line. The resonator forms by coupling a rejection filter around the resonant frequency within the bandwidth in the low-pass filter.

Abstract: A TE011 cavity filter assembly is disclosed. The system includes at least one resonator operating in TE011 mode having a resonant frequency. The at least one resonator may include a cavity comprising an inner diameter and a cavity length. The at least one resonator may also include a first metal disc inside the cavity. The first metal disc may include a disc diameter and a void in the metal disc, which includes a void diameter and a void depth. The inner diameter of the cavity may be greater than the disc diameter creating a gap with a gap width and a gap depth. The TE011 cavity filter assembly may further include positive coupling.

Abstract: Among other things, a circuit includes a first and a second electromagnetic resonator, each configured to operate in a transverse electromagnetic mode, and a coupling device configured to operate in the transverse electromagnetic mode, wherein the coupling device is connected to the first and second electromagnetic resonators and inductively couples the first and second electromagnetic resonators.