Commscope Italy S.r.l.

Commscope Technologies LLC

Outdoor Wireless Networks LLC

Forem S.p.a.

Giuseppe Resnati

Sammit Patel

Stefano Tamiazzo

Yongjie Xu

Roman Tkadlec

Omar Parimbelli

XiaoHua Hou

Richard W Brown

Igor E Timofeev

Morgan C Kurk

Martin Kufa

Frantisek Ondracek

Xianxiang Li

Qing Mi

Lukás Matrka

Jaromir Peroutka

Yangzhun Lv

Kejia Coco Cao

Daniele Marrelli

Peter John Bisiules

Enzo Cavalieri D'Oro

Andrea Manzoni

Stefano Galli

Marco Santoniccolo

Luca Ferrari

Renato Zocca

Alessandro Maurizio Delzanno

Alessandro Sartorio

The present invention provides filter assemblies, tuning elements and a method of tuning a filter. A filter assembly includes a housing having a top cover, a bottom cover and at least one sidewall, the top cover, the bottom cover and the at least one sidewall defining an internal cavity, the housing configured to receive first through third radio frequency ('RF') transmission lines; a top metal sheet mounted within the internal cavity that has a plurality of openings that form a first hole pattern; and a bottom metal sheet mounted within the internal cavity that has a plurality of openings that form a second hole pattern. The top and bottom metal sheets are vertically spaced-apart from each other in a vertically stacked relationship within the internal cavity. The top metal sheet and the bottom metal sheet each include at least one resonator.

Filter assemblies, tuning elements and method of tuning a filter

A metallized dielectric waveguide filter includes first and second input/output ports and a dielectric block that has metallized top and bottom surfaces and metallized sidewalls. The dielectric block further includes a plurality of metallized openings that extend into the interior of the dielectric block, and these metallized openings divide the dielectric block into a plurality of resonator cavities. A first of the metallized openings extends at an oblique angle with respect to a first of the metallized outer sidewalls.

Metallized dielectric waveguide filters having irregular shaped resonant cavities, slanted metallized openings and/or spurious coupling windows

Resonant cavity filters include a conductive housing having a floor. A dielectric resonator is mounted to extend upwardly from the floor. The dielectric resonator has a cylindrical body with a longitudinal bore that defines an inner sidewall. The longitudinal bore has a variable transverse cross-sectional area. A threaded dielectric fastener is at least partially inserted within the longitudinal bore of the cylindrical body.

Resonant cavity filter comprising a dielectric resonator mounted to a conductive housing by a dielectric fastener located within a longitudinal bore of the dielectric resonator

Radio frequency (RF) switches are provided. An RF switch includes a first RF transmission line and a second RF transmission line that are capacitively coupled to each other. Moreover, the RF switch includes a third RF transmission line having a signal trace that is electrically isolated from the first and second RF transmission lines. Related methods of operating filter devices are also provided.

Rotary radio frequency switches

A metallized dielectric waveguide filter includes an upper metallized dielectric waveguide having a plurality of upper resonant cavities, the upper metallized dielectric waveguide comprising an upper dielectric block having metallized outer walls, and a lower metallized dielectric waveguide having a plurality of lower resonant cavities, the lower metallized dielectric waveguide comprising a lower dielectric block having metallized outer walls. A first of the upper resonant cavities is operatively connected to a first of the lower resonant cavities via at least one coupling window. A first slot having metallized walls is provided in a portion of the upper dielectric block that is part of the first of the upper resonant cavities.

Wide bandwidth folded metallized dielectric waveguide filters

A band-stop filter comprises: a housing having a top wall, a bottom wall and at least one side wall, the housing defining an internal cavity; a signal input port and a signal output port that are respectively disposed on one of the at least one side wall; a resonating element that is disposed in the internal cavity and includes a top, a bottom, and a side; and a transmission line that is disposed in the internal cavity and coupled between the signal input port and the signal output port, the transmission line comprising a coupling section that is coupled to the resonating element, wherein the coupling section is configured to surround more than half of the side of the resonating element and not directly contact the housing and the resonating element.

Band-stop filter, transmission line for band-stop filter and multiplexer

Devices having bypassable radio frequency (RF) filters are provided. A device includes a bypassable RF filter and an adjustable-length RF transmission line that is coupled thereto. Moreover, the device includes a component that is coupled to the adjustable-length RF transmission line and is configured to change an electrical length of the adjustable-length RF transmission line between a first length and a second length. Related methods of bypassing the bypassable RF filter are also provided.

Bypassable radio frequency filters

An in-line resonator filter has a linear array of three or more conductors. A first pair of adjacent conductors has inductive main coupling and oppositely signed capacitive main coupling, while a second pair of non-adjacent conductors has inductive cross-coupling. The first and second pairs have one conductor in common. Between the second pair of non-adjacent conductors, there is no direct ohmic connection that provides the corresponding inductive cross-coupling. The oppositely signed capacitive main coupling compensates for at least a portion of the inductive main coupling between the first pair of adjacent conductors. The in-line resonator filter is able to provide one or more transmission zeros without requiring any discrete bypass connectors that provide direct ohmic connection between pairs of non-adjacent conductors. As such, the in-line resonator filters can be smaller, less complex, and less susceptible to damage.

In-line filter having mutually compensating inductive and capactive coupling

Resonant cavity filters include a conductive housing having a floor. A dielectric resonator is mounted to extend upwardly from the floor. The dielectric resonator has a cylindrical body with a longitudinal bore that defines an inner sidewall. The longitudinal bore has a variable transverse cross-sectional area. A threaded dielectric fastener is at least partially inserted within the longitudinal bore of the cylindrical body. The dielectric resonator may have a protrusion that extends inwardly from the inner sidewall.

Resonant cavity filter comprising a dielectric resonator mounted to a hollow conductive body by a threaded dielectric fastener

In-line filter having mutually compensating inductive and capacitive coupling

An exemplary antenna system has first and second antenna elements, where a diplexer is connected to each second element. First phase shifters are connected to the first elements and to the diplexers, and second phase shifters are connected to the diplexers, but not to the first elements. Either a different bandpass filter is connected to the first and second phase shifters or a single multiplexer is connected to all phase shifters. The antenna system can be used to support communications over first and second sub-bands with independent beam tilts and equivalent beamwidths, where all of the elements are used for the first sub-band, and the second elements, but not the first elements, are used for the second sub-band. Each first element is separated from an adjacent element by a first distance, and each second element is separated from an adjacent element by a second distance different from the first distance.

Antenna array with integrated filters

A resonant cavity filter has a housing having a resonator mounted therein, a tuning screw that comprises a head portion, a metallic tuning element and a dielectric spacer interposed between the head portion and the metallic tuning element. The tuning screw is mounted for coaxial insertion into an interior of the resonator to adjust a frequency response of the resonant cavity filter.

Resonant cavity filters with high performance tuning screws

Growing community of inventors

Seregno, Italy

Giuseppe Resnati