Paratek Microwave Incorporated

Khosro Shamsaifar

Louise C Sengupta

Yongfei Zhu

John Kvarnstrand

Ken Hersey

John D Robinson

Andrey Kozyrev

Edward H Davis

Ernest P Ekelman

Yu Rong

Alden Partridge

Henry Eniola

Jian Xu

Cornelius DuToit

Vladimir Keis

Donya He

Kenneth Hersey

An embodiment of the present invention provides an apparatus, comprising a plurality of sub-arrays and at least one beamformer driving the plurality of sub-arrays, the at least one beamformer employing at least one phase shifter.

Wireless local area network antenna system and method of use therefore

An embodiment of the present invention provides an apparatus, comprising a radio frequency switch capable of using tunable dielectric capacitors as the switching element for a plurality of cross connected ports. Further, the RF switching may be accomplished by creating an RF short at a tee within said apparatus by the combination of transmission lines and the impedance provided by the tunable dielectric capacitor.

Ferroelectric varactors suitable for capacitive shunt switching

An electronically tunable quad-band antenna which includes a tunable high band antenna tuned by at least one tunable varactor associated therewith; the tunable high band antenna further includes a substrate, a patch element on said substrate, at least one voltage tunable varactor associated with the patch element, a DC bias point on the patch element, an RF input on the patch element, and a temperature sensor associated with the high band pass antenna. Also included in a preferred embodiment of the electronically tunable quad-band antenna of the present invention is a tunable low band antenna tuned by at least one tunable varactor associated therewith, the tunable low band antenna further including a substrate, a patch element on said substrate, at least one voltage tunable varactor associated with said patch element, a DC bias point on said patch element, an RF input on said patch element, and a temperature sensor associated with said low band pass antenna. Also included is a controller receiving control data, and receiving output information from said low band antenna and output information from said high band antenna and controlling a first bias voltage for biasing the at least one voltage tunable varactor associated with the high band antenna and a second bias voltage for biasing the at least one voltage tunable varactor associated with the low band antenna. The bias voltages can be provided by a DC to DC converter regulator.

Electronically tunable quad-band antennas for handset applications

An embodiment of the present invention provides an apparatus, comprising a radio frequency switch capable of using tunable dielectric capacitors as the switching element. The apparatus may further comprise a cross connector connecting a plurality of ports and wherein at least one of the tunable dielectric capacitors may placed between the cross connector at and least one port, thereby enabling impedance variations between the cross connector and the ports. Further, an embodiment of the present invention may provide at least one T connector between the cross connector and at least one of the plurality of ports, wherein at least one tunable dielectric capacitor may be associated with the T connector to vary the impedance in at least one node of the T connector.

Apparatus, system and method capable of radio frequency switching using tunable dielectric capacitors

Electronic filters include an input, an output and a plurality of resonators series coupled between the input and the output. Each of the resonators is coupled to a tunable capacitance. In addition, a coupling means is provided between non-adjacent ones of the resonators. The resonators can include microstrip resonators, stripline resonators, resonant cavities, or other types of resonators. The tunable capacitance can be provided by tunable dielectric varactors or microelectromechanical variable capacitors. Another tunable capacitor can be included in the coupling means to provide a tunable notch response.

Electronically tunable combine filter with asymmetric response

A tunable filter which may include at least one resonator. The at least one resonator may comprise a ring resonator made on a dielectric substrate placed in a waveguide, wherein the waveguide may contain a cut-off portion which houses and shields at least one resonator containing at least one tunable capacitor therein. A DC Bias circuit may be connected to the at least one resonator and may be capable of providing DC bias to the at least one tunable capacitor.

Waveguide dielectric resonator electrically tunable filter

An apparatus for reducing influence by selected signal components in a communication link includes a first signal line conveying a first communication signal including a desired signal component and at least one undesired signal component; a second signal line conveying a second communication signal substantially including at least the at least one undesired signal component; a signal treating unit coupled with the second signal line for affecting at least one parameter associated with the second communication signal to present a modified second communication signal at a first output locus coupled for combining the modified second communication signal with the first communication signal to present an improved communication signal at a second output locus. The at least one undesired signal component affects the improved communication signal less than the at least one undesired signal component affects the first communication signal.

Tunable filters having variable bandwidth and variable delay

A voltage-controlled tunable filter includes at least two cavity resonators electrically coupled to each other. A voltage tunable dielectric capacitor is positioned within each of the resonators. Connections are provided for applying a control voltage to the voltage tunable dielectric capacitors. An input is coupled to the one of the resonators, and an output is coupled to the other resonator.

Electronically tunable combline filters tuned by tunable dielectric capacitors

A tunable electrical filter constructed pursuant to the teachings of the present invention includes: (a) a plurality of resonator units coupled between an input locus and an output locus; and (b) a plurality of tunable dielectric varactor units; respective individual varactor units of the plurality of varactor units being coupled between respective pairs of the plurality of resonator units, coupled between the plurality of resonator units and the input locus, and coupled between the plurality of resonator units and the output locus.

An electronic device comprises a non-metallic waveguide, a tunable component mounted within the waveguide, and a conductive layer on a surface of the waveguide. The tunable component can comprise a tunable filter. The non-metallic waveguide can comprise a plastic material. Connections for applying a tuning voltage to the tunable component can be provided. A temperature sensor can be connected to the waveguide.

Tunable RF devices with metallized non-metallic bodies

A diplexer includes a first tunable bandpass filter connected to a first port, a second tunable bandpass filter connected to a second port, and a coupling element for coupling the first bandpass filter and the second bandpass filter to a third port. Each of the tunable bandpass filters includes a tunable capacitor, wherein a control signal applied to the tunable capacitor controls the transmission characteristic of the filter. The tunable capacitor can be a tunable dielectric varactor or a microelectromechanical variable capacitor. The coupling element can include one of: a circulator, a T-junction, and an orthomode transducer. Each of the first and second filters can comprise a fin line filter including a plurality of tunable dielectric capacitors mounted within a waveguide for controlling the filter transmission characteristics. Fixed bandpass filters can be inserted between each of the tunable bandpass filters and the coupling element.

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Ellicott City, MD, United States of America

Khosro Shamsaifar