Abstract: Systems and methods for beamforming based on mixing elements together instead of conventional phase shifting are provided. A beamformer can be used to cross-mix the elements with one another to compensate for delays in signal reception. By replacing phase shifters with mixers, the system becomes agnostic to frequency of operation and angle of arrival.

Abstract: A combiner-divider includes a first impedance converter disposed between the first port and the second port, a second impedance converter disposed between the first port and the third port, and an isolation unit disposed between the second port and the third port. The isolation unit includes a balun formed of a first semi-rigid cable and a second semi-rigid cable, and terminating resistors. Each line length of the first impedance converter, the second impedance converter, and the third impedance converter corresponds to ¼ wavelength at a center frequency. A relationship of each impedance Ri of the second port and the third port, an impedance Ro of the first port, and each impedance W of the first impedance converter and the second impedance converters is expressed by W=(2×Ri×Ro)1/2.

Abstract: A diplexer (100) includes: first and second directional couplers (106A, 106B); and first and second filters (101A, 101B). The filters (101A, 101B) each include a plurality of resonators (110A to 150A, 110B to 150B) that are electromagnetically coupled. The resonators (110A to 150A, 110B to 150B) each have a broad wall that is in a shape of a circle or a regular polygon with six or more vertices, and two resonators, which are coupled together, of the resonators (110A to 150A, 110B to 150B) are arranged such that D<R1+R2 is satisfied, where R1 and R2 represent radii of circumcircles of the broad walls of the two resonators and D represents a center-to-center distance between the two resonators.

Abstract: Provided is a waveguide including an input end configured to receive an input wave from an outside; a filtering portion configured to change a frequency range of the input wave; an output end configured to output an output wave of which a frequency range is changed from the frequency range of the input wave; and an inner wall controller configured to control a size of an inner wall of the filtering portion such that the frequency range of the input wave changes to the frequency range of the output wave.

Abstract: The RF filters used in conventional mobile devices often include resonator structures, which often require free-standing air-gap structure to prevent mechanical vibrations of the resonator from being damped by a bulk material. A method for fabricating a resonator structure comprises depositing a non-conformal thin-film to the resonator structure to seal air gap cavities in the resonator structure.

Abstract: An apparatus may include a substrate assembly having a first side and a second side. The apparatus may further include a waveguide antenna element positioned on the first side of the substrate assembly. The apparatus may also include a microstrip line positioned within the substrate assembly, where the waveguide antenna element overlaps the microstrip line. The apparatus may include a first conductive plane positioned on the first side of the substrate assembly. The apparatus may further include a second conductive plane positioned on the second side of the substrate assembly. The first conductive plane and the second conductive plane may define at least a portion of a planar surface integrated waveguide or a planar stripline.

Abstract: A cavity-type radio frequency filter is disclosed. the radio frequency filter having a cavity structure including an enclosure, a resonant element, a cover, a frequency tuning screw, and a resilient fixing member. The enclosure has a hollow inside and an open surface on one side to have a cavity. The resonant element is positioned in the hollow of the enclosure. The cover has a screw hole having a preset diameter at a position corresponding to the resonant element, and is configured to seal the open surface of the enclosure. The frequency tuning screw is configured to be screwed into the screw hole of the cover, and it has an upper end formed at least partially with a latching abutment that protrudes outwardly.

Abstract: A vertically integrated circuit assembly may include a substrate including a plurality of electrical traces, and a first circuit assembly layer disposed on the substrate. In embodiments, the first circuit assembly layer includes a first set of integrated circuit components, and a plurality of electrical interconnects configured to route signals through the first circuit assembly layer. In embodiments, the vertically integrated circuit assembly further includes a second circuit assembly layer coupled to the top surface of the first circuit assembly layer. The second circuit assembly layer may include a second set of integrated circuit components, and a plurality of electrical interconnects configured to route signals through the second circuit assembly layer. In embodiments, an electrical interconnect arrangement on a top surface of the first circuit assembly layer is configured to interface with an electrical interconnect arrangement on the bottom surface of the second circuit assembly layer.

Abstract: An acoustic wave device includes: a piezoelectric substrate; and a pair of comb-shaped electrodes located on the piezoelectric substrate, each of the comb-shaped electrodes being formed mainly of a monocrystalline metal film, each of the comb-shaped electrodes including electrode fingers.

Abstract: An electronic device includes a signal processor, a substrate, and a conductive housing. The signal processor includes an oscillator that outputs oscillation signal. The substrate has a ground component, the signal processor being disposed on the substrate. The conductive housing is connected to a first site of the ground component and to a second site that is different from the first site. The first site and the second site are disposed at positions where a first area of the housing that is an odd-numbered multiple of ¼ wavelength of the oscillation signal away from the first site overlaps at least part of a second area of the housing that is a multiple of ¼ wavelength of the oscillation signal away from the second site.

Abstract: A tunable filter for adjustable filtering between a minimum frequency and a maximum frequency includes a transmission line designed to transmit a signal and having longitudinal axis. The tunable filter further includes a two-dimensional capacitor array including step-tunable capacitors located along the transmission line, a first dimension of the two-dimensional capacitor array being along the longitudinal axis and a second dimension of the two-dimensional capacitor array being located perpendicular to the longitudinal axis. The tunable filter further includes a controller coupled to each of the step-tunable capacitors and designed to control each of the step-tunable capacitors independently to be in a biased mode or in an unbiased mode based on a desired frequency response of the tunable filter.

Abstract: The disclosure relates to a wideband, tunable hybrid-based combiner for a Doherty power amplifier architecture. The architecture includes two parallel power amplifiers: a carrier amplifier and a peaking amplifier. The peaking amplifier modulates the load seen by the carrier amplifier, allowing the carrier amplifier to remain in high-efficiency, saturated operation even at back-off. This load modulation can be achieved using impedance matching networks having an impedance matched to a specific frequency. Typically, a multi-mode/multi-band power amplifier module that does not include a tunable impedance circuit as disclosed herein, several Doherty power amplifier modules (each of which uses two amplifiers) would be used to cover several bands, which may make implementation costly and/or impractical. Thus, the architectures described herein provide wideband amplification using a Doherty amplifier configuration.

Abstract: A coupled resonator filter includes a first resonator, a second resonator, one or more intervening layers, a first border ring, and a second border ring. The first resonator includes a first piezoelectric layer and a first electrode in contact with the first piezoelectric layer. The second resonator includes a second piezoelectric layer and a second electrode in contact with the second piezoelectric layer. The one or more intervening layers are between the first resonator and the second resonator and acoustically couple the first resonator and the second resonator. The first border ring is on the first electrode. The second border ring is on the second electrode. By providing both the first border ring and the second border ring, spurious modes in the coupled resonator filter may be suppressed, thereby improving the performance thereof.

Abstract: An apparatus for high-power combining includes multiple power-combining building blocks, a passive input network to couple one or more input signals to one or more input ports of the multiple power-combining building blocks, and a passive output network to couple to output ports of the multiple power-combining building blocks and to generate one or more amplified output signals. Each power-combining building block includes M high-power amplifiers (HPAs) coupled in parallel to a respective passive input network and a respective passive output network. A count of the multiple power-combining building blocks is determined based on a desired total number N of the HPAs and a number M of the HPAs in each power-combining building block.

Abstract: In an example embodiment, a waveguide device comprises: a first common waveguide; a polarizer section, the polarizer section including a conductive septum dividing the first common waveguide into a first divided waveguide portion and a second waveguide divided portion; a second waveguide coupled to the first divided waveguide portion of the polarizer section; a third waveguide coupled to the second divided waveguide portion of the polarizer section; and a dielectric insert. The dielectric insert includes a first dielectric portion partially filling the polarizer section. The conductive septum and the dielectric portion convert a signal between a polarized state in the first common waveguide and a first polarization component in the second waveguide and a second polarization component in the third waveguide.

Abstract: An acoustic wave filter device is disclosed. The device includes an acoustic wave filter element, and a first resonator and a second resonator coupled to the acoustic wave filter element. The acoustic wave filter element includes interdigited input electrodes and output electrodes located on a top surface of a piezoelectric layer. Each of the first and the second resonators includes a top electrode on the top surface, and a bottom electrode on the bottom surface of the piezoelectric layer. At least one of each of the first and the second resonators' electrodes is electrically connected to the acoustic wave filter element. The first resonator has a first notch in resonator impedance at a first frequency. The second resonator includes a first mass loading layer on the second resonator electrode such that the second resonator has a second notch in resonator impedance at a second frequency different from the first frequency.

Abstract: A surface acoustic wave device includes a piezoelectric material layer, a pair of busbars, a plurality of electrode fingers, and reflectors. The piezoelectric material layer has a thickness that is in a range of 1 to 2.5 times of an acoustic wavelength. A main mode of an elastic wave excited on the piezoelectric material layer by the electrode fingers is a leaky surface acoustic wave. A design variable is set such that a minimum propagation loss frequency where a propagation loss becomes minimum and a frequency of a plate wave spurious formed due to a slow shear wave excited together with the leaky surface acoustic wave are matched. A propagation velocity of a slowest bulk wave of an elastic wave that propagates in a lower layer of the piezoelectric material layer is equal to or more than 1.05 times of a velocity of the leaky surface acoustic wave.

Abstract: The mode-whisperer waveguide device includes a main waveguide, a junction waveguide and a pair of recombination arm waveguides. The main waveguide features a spline taper extending along an axis of the main waveguide. The spline taper has been integrated with the normal linear aperture taper. The junction waveguide is attached to the main waveguide. The recombination arm waveguides are attached to the junction waveguide. A first port is coupled to the pair of recombination arm waveguides via a pair of recombination arm transformer steps. The main waveguide, the junction waveguide, the pair of recombination arm waveguides and the pair of recombination arm transformer steps are manufacturable as a monolithic waveguide device that is configured to achieve outstanding higher-order mode suppression due to the gradual dual spline taper which has been integrated with the normal linear taper to the aperture port.

Abstract: Lossy members, which are disposed to overlap with a part of branch conductors in a signal conductor, respectively, and cause a loss of the power of signals flowing in the branch conductors, and via holes connecting each of the output terminals of the signal conductor and the ground conductor are included. The branch conductor includes a delay circuit having an electrical length of 90 degrees.

Abstract: Aspects of this disclosure relate to an acoustic wave device that includes a multi-layer interdigital transducer electrode. The acoustic wave device includes a piezoelectric layer and an interdigital transducer electrode on the piezoelectric layer. The interdigital transducer electrode includes a first interdigital transducer electrode layer positioned between a second interdigital transducer electrode layer and the piezoelectric layer. The second interdigital transducer electrode layer can include aluminum and having a thickness of at least 200 nanometers. The acoustic wave device can include a temperature compensation layer arranged such that the interdigital transducer electrode is positioned between the piezoelectric layer and at least a portion of the temperature compensation layer. Related filters, modules, wireless communication devices, and methods are disclosed.