Abstract: A method for an antenna mismatch compensation may include determining an amplitude ratio by measuring a ratio of amplitudes of a reflected signal and an incident signal of an antenna tuning circuit coupled to an antenna. A time difference between the reflected signal and the incident signal may be measured. The time difference may be converted to a phase difference. A topology and one or more parameters of the antenna tuning circuit may be determined based on the amplitude ratio and the phase difference so that the antenna tuning circuit compensates for the antenna mismatch.

Abstract: Communications plugs are provided that include a housing that receives the conductors of the communication cable. A printed circuit board is mounted at least partially within the housing. A plurality of plug contacts are on the printed circuit board, and the printed circuit board includes a plurality of conductive paths that electrically connect respective ones of the conductors to respective ones of the plug contacts. First and second of the conductive paths are arranged as a first differential pair of conductive paths that comprise a portion of a first differential transmission line through the communications plug, where the first differential transmission line includes a first transition region where the impedance of the first differential transmission line changes by at least 20% and a second transition region impedance of the first differential transmission line changes by at least 20%.

Abstract: High-speed pluggable rigid-end flex circuit. A circuit includes a flexible section, rigid section, connector disposed on the rigid section, and electrically conductive signal transmission line electrically coupled to the connector. The flexible section includes a first portion of a flexible insulating layer. The rigid section includes a second portion of the flexible insulating layer and a rigid insulating layer disposed on the second portion of the flexible insulating layer. The connector is configured to form a pluggable conductive connection. The electrically conductive signal transmission line includes a first signal trace having a root mean square surface roughness below 20 micrometers and a filled signal via configured to pass through at least a portion of the rigid insulating layer. The flexible and rigid insulating layers have a dissipation factor equal to or below a ratio of 0.004 and a dielectric constant equal to or below a ratio of 3.7.

Abstract: Disclosed herein are an asymmetrical multilayer substrate, an RF module, and a method for manufacturing the asymmetrical multilayer substrate. The asymmetrical multilayer substrate includes a core layer, a first pattern layer formed on one side of the core layer and including a first signal line pattern, a second pattern layer formed on the other side and including a second metal plate and a second routing line pattern, a first insulating layer thinner than the core layer formed on the second pattern layer and including a first via, and a third pattern layer formed on the first insulating layer and including a third signal line pattern, wherein an impedance transformation circuit including an impedance load and a parasitic capacitance load on the transmission line is formed for impedance matching in signal transmission between the signal line patterns formed in the upper and lower side directions of the core layer.

Abstract: A MEMS mixer filter including an array of a multiplicity of resonator elements with conductive outer surfaces in a coplanar rectangularly tiled array, and two sets of DC bias lines in which alternating resonator elements in each row and column are connected to one or the other sets of bias lines so that laterally adjacent resonators may be biased to a DC potential. The resonator elements are uniform in size and shape. Lateral dimensions of the resonator elements are between 5 and 50 microns. The resonator elements are between 100 nanometers and 100 microns thick, and adjacent resonator elements are separated by a gap between 100 and 500 nanometers. A process of forming the MEMS mixer filter.

Abstract: The invention relates to an adjustable capacitative element which can assume discrete capacity values the impedance values Zi of which that it can assume are distributed as evenly as possible in the Smith Chart. An adjustable capacitative element comprises a capacitor which can assume discrete capacity values. The phase of the reflection factor or the impedance values of the capacity values are interspaced equidistantly.

Abstract: A method and circuit for significantly reducing positive switching transients (glitches) of digital step attenuators (DSA's) by controlling the timing of state transitions for individual attenuator stages within a DSA. Such control prevents the DSA output power from peaking during attenuation state transitions and ensures that any transient glitch during the transition results in reduced power at the DSA output. Attenuation stage timing delay can be implemented on an integrated circuit die or “chip” for monolithic implementations of a DSA by adding circuitry which ensures that any attenuation state changes result in increased attenuation rather than decreased attenuation, thereby reducing or eliminating positive transient glitches at the DSA output.

Abstract: Radio frequency system (250) which includes a first and second sub-assembly (100, 200), each formed of a plurality of layers of conductive material (504, 508, 516) disposed on a substrate (102) and arranged in a stack. The stacked layers form signal processing components (108, 110) and at least one peripheral wall (104, 204) surrounding a walled area (118, 218) of each substrate. The second sub-assembly is positioned on the first sub-assembly with a first walled area of a first substrate aligned with a second walled area of a second substrate.

Abstract: A DMS filter has improved signal suppression in fly-back. At least two transformers of a first type are connected in parallel between a common node of the signal path and a ground connection/reference potential. A concentrated element is connected in the signal path of said transformers of the first type, so that the voltages present at the first transformers are different from each other.

Abstract: In one embodiment, a vertical microcoaxial interconnect includes a dielectric substrate having a top side and a bottom side, an inner conductor extending through the substrate from its top side to its bottom side, an outer conductor that extends through the substrate from its top side to its bottom side, the outer conductor surrounding the inner conductor, a signal line extending to the inner conductor without contacting the outer conductor, and a ground line extending to the outer conductor without contacting the inner conductor or the signal line.

Abstract: A SAW filter includes a piezoelectric substrate, a longitudinal coupling portion disposed on a main surface of the piezoelectric substrate, a support layer and cover layers covering the main surface of the piezoelectric substrate with an air gap on the longitudinal coupling portion, and bumps that are disposed on one of the cover layers and are electrically connected to the longitudinal coupling portion. A mount board is mounted on a motherboard. The SAW filter is mounted on the mount board via the bumps.

Abstract: An acoustic resonator device includes an annular acoustic resonator, a heater coil and a heat sensor. The annular acoustic resonator is positioned over a trench formed in a substrate of the acoustic resonator device. The heater coil is disposed around a perimeter of the annular acoustic resonator, the heater coil including a resistor configured to receive a heater current. The heat sensor is configured to adjust the heater current in response to a temperature of the heater coil.

Abstract: A bulk acoustic resonator assembly and methods for fabricated the resonator assembly is provided. The resonator includes a cavity on a first surface of a substrate, with a sheet of low acoustic loss material suspended over the cavity. The sheet of low acoustic loss material is configured such that an associated fundamental frequency of the sheet of low acoustic loss material is a function of a length of the sheet of low acoustic loss material in a direction parallel to the first surface of the substrate. A transducer includes an electromechanical layer on the sheet of low acoustic loss material and a patterned conductive material formed on the electromechanical material. The transducer is configured to induce vibrations in the low acoustic loss material upon application of an electrical signal to the conductive pattern.

Abstract: There are provided a polarizer rotating device and a satellite signal receiving apparatus having the same. The satellite signal receiving apparatus includes a feedhorn that receives a satellite signal; a low noise block down converter that processes the signal received by the feedhorn; a skew compensating device that is provided at the low noise block down converter or the feedhorn and rotates the low noise block down converter or the feedhorn to compensate for a skew angle when the satellite signal received by the feedhorn is a linearly polarized wave; a polarizer that receives a linearly polarized signal and a circularly polarized signal of the satellite signal; and a polarizer rotating device that rotates the polarizer when the satellite signal received by the polarizer is a circularly polarized wave. In such a simple structure, the linearly polarized wave and the circularly polarized wave are all received to be processed.

Abstract: A method and an apparatus are described for constructing a compact inductive-capacitive circuit, using a spiral inductor of more than one turn, plus a capacitive plate. This method includes duplicating the layout of the spiral, and then offsetting the duplicate so that the trace pattern of the spiral overlaps its duplicate at an insulating distance away, with the duplicate as an underlying capacitive plate. The plate's trace pattern includes at least one gap, plus an extension of its trace to span the region under the terminals of the spiral inductor. For the case where the spiral inductor has more than one turn—plus an underpass—the capacitive plate may also have more than one turn and may also have an underpass. The resulting pair of underpasses may be either overlapping or nonoverlapping. If overlapping, the full circuit requires at least four metal layers, and at least three if the underpasses are nonoverlapping.

Abstract: Various exemplary embodiments relate to a filter configured to operate in an operational frequency range. The filter may include a mainline, at least one combline resonator coupled to the mainline, an input port coupled to the mainline, and an output port coupled to the mainline. The mainline may include at least one non-resonant node. The at least one non-resonant node may be configured to resonate in a frequency range outside of the operational frequency range of the filter, and the at least one combline resonator may be configured to resonate in a frequency range within the operational frequency range of the filter.

Abstract: An apparatus, comprises a piezoelectric layer, a first acoustic resonator comprising first and second electrodes formed on opposite sides of the piezoelectric layer, and a second acoustic resonator comprising first and second electrodes formed on opposite sides of the piezoelectric layer and acoustically coupled to the first acoustic resonator.

Abstract: An impedance matching device includes a first variable capacitor connected to an RF power source and including a first shaft moving linearly, a first linear motion unit axially coupled to the first shaft of the first variable capacitor to provide linear motion, a first insulating joint connecting the first shaft to a first driving shaft of the first linear motion unit, and a first displacement sensor adapted to measure a movement distance of the first driving shaft of the first linear motion unit.

Abstract: In one embodiment, the present invention is a communication connector, comprising a compensation circuit for providing a compensating signal to approximately cancel an offending signal over a range of frequency, the compensation circuit including a capacitive coupling with a first magnitude growing at a first rate over the range of frequency and a mutual inductive coupling with a second magnitude growing at a second rate over the range of frequency, the second rate being greater than the first rate (e.g., the second rate approximately double the first rate).

Abstract: Ultra-wideband 180° hybrids for feeding a radiator of one band of a dual-band dual-polarization cellular basestation antenna are disclosed. The hybrid comprises: metal plates configured in parallel as groundplanes, and a dielectric substrate disposed between plates. First and second metallizations are implemented on opposite exterior surfaces of substrate and are shorted together to keep metal tracks at same potential to form conductor. Plates and first and second metallizations form first stripline circuit implementing matched splitter with short-circuit shunt stub Sum input port is provided at one end and two output ports are provided at opposite ends. Branches of matched splitter narrow to provide gap between output tracks. Third metallization is disposed within substrate. First, second and third metallizations form second stripline circuit. Tracks of third metallization comprise quarter-length transformers of different widths.