Abstract: Compounds and methods are provided for inhibiting an aldehyde dehydrogenase (ALDH). Methods of treating cancer are also provided. The ALDH-inhibitor can be a compound that is based on a cyclic guanidine, or an imidazolium core. In certain embodiments, the ALDH-inhibitor compound is a substituted cyclic guanidine, or a substituted imidazolium compound. Aspects of the methods include methods of selectively inhibiting a particular ALDH family member. In some cases, the subject compounds are ALDH1 B1-selective inhibitors. In some cases, the subject compounds are ALDH1A3-selective inhibitors.

Abstract: An outdoor microwave radio, which supports two channels aggregation, includes a cable interface, a radio frequency processing section, and an antenna coupling section. The cable interface includes two cables, each cable configured to receive an analog intermediate frequency signal from a modem output at a remote indoor microwave radio. The radio frequency processing section configured to process the two analog intermediate frequency signals into one analog radio frequency signal. The antenna coupling section includes a co-plane circulator for connecting to an antenna and transmitting the analog radio frequency signal using the antenna.

Abstract: A circulator includes a substrate having a blind hole. The substrate has one or more dielectric layers and one or more conductive layers, including a top conductive layer on a top surface of the substrate. The circulator includes a plurality of conductive microstrips formed on the top conductive layer on the top surface of the substrate and a ferrite disk positioned within the blind hole. A top surface of the ferrite disk is flush with a top surface of the plurality of conductive microstrips. The circulator further includes a flat metal film coupling a top surface of the ferrite disk to the conductive microstrips disposed on the top surface of the substrate.

Abstract: A circulator plate for a microwave radio system is disclosed. The circulator plate includes a circulator including a first port, a second port, and a third port; a first isolator including an input port and an output port; a second isolator including an input port and an output port; and a splitter including an input port, a first output port, and a second output port. The output port of the first isolator is coupled to the first port of the circulator. The input port of the second isolator is coupled to the third port of the circulator. The input port of the splitter is coupled to the output port of the second isolator. The first output port of the splitter is configured to be coupled to a first receiver. The second output port of the splitter is configured to be coupled to a second receiver.

Abstract: A waveguide apparatus comprises an input port having a rectangular cross-section in a plane perpendicular to a direction of propagation. The rectangular cross-section has a short side and a long side. The waveguide apparatus further comprises a plurality of resonant cavities, coupled with the input port, including a first resonant cavity and a second resonant cavity diagonally disposed with respect to each other in the plane perpendicular to the direction of propagation. Each resonant cavity has a square cross-section in the plane perpendicular to the direction of propagation. The waveguide apparatus further comprises an output port coupled with the plurality of resonant cavities on a side opposite the input port. The output port has a rectangular cross-section with a short side and a long side, wherein the short side of the output port's cross-section is perpendicular to the short side of the input port's cross-section.

Abstract: A band-pass filter for a wireless communications signal is provided. The band-pass filter includes a first element and a second element that mates with the first element to form a waveguide. The formed waveguide comprises a first linear segment and a second linear segment coupled by a first angular bend. The band-pass filter further includes an insert plate disposed between the first element and the second element along a direction of propagation of the waveguide. The direction of propagation follows the angular bend in the waveguide. In some embodiments, the band-pass filter is an E-plane filter. In some embodiments, the band-pass septum filter has a shorter length along an x-direction than a straight septum filter with the same performance.

Abstract: A method for biasing a power amplifier using a transmission signal having a time-varying envelope is provided. The method comprises producing a time-varying signal indicative of an amplitude of the envelope of the transmission signal and comparing the time-varying signal to a plurality of distinct threshold voltages. The method further comprises, for each of the plurality of distinct threshold voltages exceeded by the time-varying signal, providing a respective bias voltage to a respective input of a summing device and producing, using the summing device, an output bias voltage that is at least a sum of the respective bias voltages provided to the respective inputs of the summing device. The method further comprises biasing the power amplifier with the output bias voltage and amplifying the transmission signal using the power amplifier biased at the output bias voltage.

Abstract: An antenna coupling unit (ACU) is provided. The ACU includes a transmitter port, a receiver port, and an antenna port; a circulator isolating the transmitter port from the receiver port; a first waveguide coupling the transmitter port with the circulator. The transmitter port receives an outgoing from first external circuitry. The first waveguide includes a first filter that filters the outgoing before routing the outgoing signal to the antenna port. The ACU further includes a second waveguide coupling the circulator with the receiver port. The second waveguide includes a second filter that filters an incoming received through the antenna port before routing the incoming signal to the receiver port. The receiver port provides the filtered incoming to second external circuitry. The ACU further includes a third waveguide coupling the antenna port with the circulator. At least one of the first filter and the second filter is a tunable filter.

Abstract: A tunable radio frequency (RF) filter is provided. The tunable RF filter includes a first element and a second element that mates with the first element to form a waveguide. The waveguide includes a plurality of irises having band-pass characteristics. The tunable RF filter further includes a moveable dielectric plate disposed between the first element and the second element along a direction of propagation of the waveguide and a drive assembly that moves the moveable dielectric plate relative to the plurality of irises.

Abstract: A radio-frequency (RF) component includes a first portion of a waveguide configured to transmit an electro-magnetic (EM) wave. The RF component includes a waveguide coupling configured to receive the EM wave from the first portion of the waveguide and transmit the EM wave to an external RF component. The waveguide coupling includes a waveguide plate having a second portion of the first waveguide formed therein; a waveguide spacer having a third portion of the first waveguide formed therein; and a conductive spring circumferentially disposed around the first waveguide in between the waveguide plate and the waveguide spacer.

Abstract: A circulator plate for a microwave radio system is disclosed. The circulator plate includes a circulator including a first port, a second port, and a third port; a first isolator including an input port and an output port; a second isolator including an input port and an output port; and a splitter including an input port, a first output port, and a second output port. The output port of the first isolator is coupled to the first port of the circulator. The input port of the second isolator is coupled to the third port of the circulator. The input port of the splitter is coupled to the output port of the second isolator. The first output port of the splitter is configured to be coupled to a first receiver. The second output port of the splitter is configured to be coupled to a second receiver.

Abstract: A band-pass filter for a wireless communications signal is provided. The band-pass filter includes a first element and a second element that mates with the first element to form a waveguide. The formed waveguide comprises a first linear segment and a second linear segment coupled by a first angular bend. The band-pass filter further includes an insert plate disposed between the first element and the second element along a direction of propagation of the waveguide. The direction of propagation follows the angular bend in the waveguide. In some embodiments, the band-pass filter is an E-plane filter. In some embodiments, the band-pass septum filter has a shorter length along an x-direction than a straight septum filter with the same performance.

Abstract: A method for biasing a power amplifier using a transmission signal having a time-varying envelope is provided. The method comprises producing a time-varying signal indicative of an amplitude of the envelope of the transmission signal and comparing the time-varying signal to a plurality of distinct threshold voltages. The method further comprises, for each of the plurality of distinct threshold voltages exceeded by the time-varying signal, providing a respective bias voltage to a respective input of a summing device and producing, using the summing device, an output bias voltage that is at least a sum of the respective bias voltages provided to the respective inputs of the summing device. The method further comprises biasing the power amplifier with the output bias voltage and amplifying the transmission signal using the power amplifier biased at the output bias voltage.

Abstract: A compact antenna feeder and associated circulator plate are disclosed. The antenna feeder includes: an orthomode transducer (OMT) polarizer, a first circulator and a second circulator. The OMT -polarizer includes a septum, a first port, a second port, and a third port. The first circulator is coupled to the first port of the OMT polarizer to define one orthogonally polarized microwave signal path between the first circulator and the third port of the OMT-polarizer. The second circulator is coupled to the second port of the OMT polarizer to define another orthogonally polarized microwave signal path between the second circulator to the third port of the OMT-polarizer. The OMT polarizer includes a waveguide with the septum located therein separating the two orthogonally polarized microwave signal paths. The septum has a base mounted on the circulator plate and a step-shape body extending from the base and out of the circulator plate.

Abstract: An antenna coupling device is disclosed. The device includes a first isolator that includes an input port and an output port and a first circulator that includes a first port, a second port, and a third port. The first port of the first circulator is coupled with the output port of the first isolator; and the second port of the first circulator is configured for coupling with a first antenna. The device also includes a second isolator that includes an input port and an output port. The input port of the second isolator is coupled with the third port of the first circulator.

Abstract: A radio-frequency (RF) component includes a first portion of a waveguide configured to transmit an electro-magnetic (EM) wave. The RF component includes a waveguide coupling configured to receive the EM wave from the first portion of the waveguide and transmit the EM wave to an external RF component. The waveguide coupling includes a waveguide plate having a second portion of the first waveguide formed therein; a waveguide spacer having a third portion of the first waveguide formed therein; and a conductive spring circumferentially disposed around the first waveguide in between the waveguide plate and the waveguide spacer.

Abstract: An antenna coupling device is disclosed. The device includes a first isolator that includes an input port and an output port and a first circulator that includes a first port, a second port, and a third port. The first port of the first circulator is coupled with the output port of the first isolator; and the second port of the first circulator is configured for coupling with a first antenna. The device also includes a second isolator that includes an input port and an output port. The input port of the second isolator is coupled with the third port of the first circulator.

Abstract: The present disclosure relates to a music playback method, a third-party application and a device which are in the field of computer technique. The music playback method includes integrating a background music playback module into a third-party application, receiving a music playing signal in which a playlist identification is included, transmitting the music playing signal to the background music playback module through a predetermined port, acquiring by the background music playback module a corresponding playlist based on the playlist identification of the music playing signal, and randomly playing the music in the playlist by the background music playback module.

Abstract: The present disclosure relates to a music playback method, a third-party application and a device which are in the field of computer technique. The music playback method includes integrating a background music playback module into a third-party application, receiving a music playing signal in which a playlist identification is included, transmitting the music playing signal to the background music playback module through a predetermined port, acquiring by the background music playback module a corresponding playlist based on the playlist identification of the music playing signal, and randomly playing the music in the playlist by the background music playback module.