Abstract: A diversity receiver module comprising a multiple pole multiple throw switch, one throw being connected to a signal path configured to support both ultra-high band transmit signals and high-band transmit signals, and another throw being connected to an ultra-high band signal path configured to output an ultra-high band receive signal; an ultra-high band filter configured to filter ultra-high band signals, the ultra-high band filter being connected to a pole of the switch via a signal path; a high band filter configured to filter high band receive signals, the high band filter being diplexed with the ultra-high band filter; and a high band signal path configured to output a high-band receive signal, the high band signal path being connected to the high band filter.

Abstract: A method and system for frequency matching a resonant cavity is disclosed. Light is received in a resonant cavity having at least a first mirror and a second mirror defining a path along which light is reflected. At least the second mirror is actuatable to vary the length of the path of the resonant cavity. An intensity of the light exiting or reflecting from the resonant cavity is monitored, and an error correction is determined. The second mirror is actuated towards a pose relative to the first mirror at which a frequency of the light is in resonance with the length of the path. In this manner, the resonant cavity is frequency matched to the light to maintain the resonant cavity in resonance.

Abstract: A filter allows a transmission signal in a predetermined frequency band to pass from a second input-output terminal to a first input-output terminal and allows a reception signal in the predetermined frequency band to pass from the first input-output terminal to the second input-output terminal. A first common terminal of a first switch is connected to the second input-output terminal. A second terminal and a first terminal of the first switch are exclusively connectable to the first common terminal. A second common terminal of a second switch is connected to a ground terminal of the filter. A second selection terminal and a first selection terminal of the second switch are exclusively connected to the second common terminal. Of the first selection terminal and the second selection terminal, only the first selection terminal is connected to a ground with a reactive element interposed therebetween.

Abstract: A transmission line monitoring system and central processing facility are used to determine the geometry, such as a height, of one or more conductors of a power transmission line and real-time monitoring of other properties of the conductors.

Abstract: A signal matching apparatus for an evaluation circuit for evaluating an electromagnetic signal for operation in an inductive energy transmission system, the apparatus including a signal transmission device, wherein the signal transmission device includes an antenna connection for connecting a receiving antenna, an evaluation connection for connecting the evaluation circuit for the electromagnetic signal, wherein the antenna connection is configured to receive the electromagnetic signal, wherein the signal transmission device is configured to leave the phase of the electromagnetic signal substantially unchanged and wherein the signal transmission device is configured to match the amplitude of the electromagnetic signal to a characteristic prescribable by the evaluation circuit, wherein the evaluation connection is configured to provide the electromagnetic signal to the evaluation circuit.

Abstract: An apparatus for communicating across an isolation barrier includes a differential pair of input terminals. The apparatus includes a bandpass filter circuit configured to receive a received signal on the differential pair of input terminals and to provide a received differential signal on a differential pair of nodes. The apparatus includes a demodulator directly coupled to the bandpass filter circuit and configured to directly demodulate the received differential signal on the differential pair of nodes to provide a demodulated received signal.

Abstract: Examples disclosed herein relate to a high gain active relay antenna system. The active relay antenna system comprises a first antenna pair having a first receive antenna and a first transmit antenna to communicate wireless signals in a forward link from a base station to a plurality of users; and a second antenna pair having a second receive antenna and a second transmit antenna to communicate wireless signals in a return link from the plurality of users to the base station. The active relay antenna system further comprises a first active relay section and a second active relay section to provide for adjustable power gain in the wireless signals.

Abstract: A power divider/combiner includes a first transmission line that includes a first part and a second part, and a second transmission line and a third transmission line that are electromagnetically coupled with the first transmission line. The first part, the second part, the second transmission line and the third transmission line are each of a particular length. The first part, the second transmission line and the third transmission line are respectively connected to a first port, a second port and a third port for inputting/outputting signals having a target wavelength equal to four times the particular length.

Abstract: There is provided an attenuation amount setting unit that sets, in a case where signals are simultaneously output from all output ports of a plurality of interface units at the same signal level, one of the plurality of interface units as the reference interface unit, and adds a difference between an attenuation amount of a second attenuator stored in a storage unit of the reference interface unit and an attenuation amount of another second attenuator stored in another storage unit of the other interface unit to an attenuation amount of each of a plurality of third attenuators of the other interface unit to correct the attenuation amount.

Abstract: Tunable, broadband directional coupler circuits employing one or more additional, switchable coupling circuits for controlling frequency response, and related methods. In exemplary aspects, the directional coupler includes one or more additional coupling circuits that each include an additional coupling line located adjacent to the primary coupling line and that can be selectively activated to change a frequency response of the directional coupler. When an additional coupling circuit is activated, its additional coupling line has the effect of extending the length of the primary coupling line through mutual inductance, thus changing the coupling frequency response of the directional coupler. The additional coupling circuit includes one or more switch(es) to allow for the selective coupling of its additional coupling line to the coupling and/or isolation ports of the directional coupler to selectively change and control the frequency response of the primary coupling line.

Abstract: An analogue-to-digital converter (ADC), comprising: an adaptive whitening filter configured to filter an analogue input signal and output a whitened analogue input signal; a first converter configured to receive said whitened analogue input signal and output a whitened digital signal; a controller configured to adapt the whitening filter based on the received analogue input signal.

Abstract: A method of and a receiver for mitigating multipath interference in a global navigation satellite system. In accordance with an embodiment, GNSS signals are received from a plurality of satellites in at least two frequency bands. A likelihood indicator is determined which is indicative of how likely the received GNSS signals are affected by multipath interference. In response to the likelihood indicator, all GNSS signals from at least one frequency band of the at least two frequency bands are discounted. The received GNSS signals are processed by taking into account said discounting of all GNSS signals in the at least one frequency band. The discounting may include assigning less weight to the discounted frequency bands or disregarding each of the discounted frequency bands in their entirety.

Abstract: A multicarrier ablation system comprising: an antenna for application to biological tissue; a multi-carrier signal generator configured to provide a forward radio frequency (RF) signal to the antenna, the forward RF signal comprising multiple subcarriers that occupy respective frequencies within a bandwidth of the RF signal; and a monitoring circuit configured to receive a reflected RF signal from the antenna and control the multi-carrier signal generator to adjust one or more parameters of the forward RF signal during an ablation procedure based on the reflected RF signal.

Abstract: A transmission line monitoring system and central processing facility are used to determine the geometry, such as a height, of one or more conductors of a power transmission line and real-time monitoring of other properties of the conductors.

Abstract: A trans-inductor voltage regulator (TLVR) circuit has multiple phases and a regulator block for each phase. Each regulator block is connected to an output capacitor of the TLVR circuit by way of a first winding of a corresponding nonlinear transformer. A second winding of the nonlinear transformers are connected in series with a compensation inductor. The first winding of the corresponding nonlinear transformer has a first inductance when a load current is at a first level, and the first winding of the corresponding nonlinear transformer has a second inductance that is less than the first inductance when the load current is at a second level that is higher than the first level.

Abstract: Provided are communication devices having adaptable features and methods for implementation. One device includes at least one adaptable component and a processor configured to detect an external cue relevant to operation of the at least one adaptable component, to determine a desired state for the at least one adaptable component corresponding to the external cue, and then to dynamically adapt the at least one adaptable component to substantially produce the desired state. One adaptable component comprises at least one adaptable speaker system. Another adaptable component comprises at least one adaptable antenna.

Abstract: A reception-side IC chip (1a) includes a pad (15) which is connected to a transmission line (2) which is outside the chip and has a characteristic impedance Z0 of 50?, a signal line (16), one end of which is connected to the pad (15), a reception-side input unit circuit (10) configured to receive a signal (S) transmitted from a transmission-side IC chip via the transmission line (2), a 50-? termination resistor (11), for impedance matching, which is connected between a predetermined voltage and the other end of the signal line (16) and is configured to terminate the transmission line (2), and a capacitor (12) inserted between a node (A) of the signal line (16) and the termination resistor (11) and an input terminal (In) of the reception-side input unit circuit (10). A DC-blocking circuit is formed by the capacitor (12).

Abstract: Disclosed herein are systems and methods for performing SAG effect compensation on a video signal received over an AC-coupled video link. In one aspect, a method for performing SAF effect compensation includes applying a filter to the received video signal to generate a corrected video signal, where a transfer function of the filter is dependent on a transmission parameter that is based on a plurality of parameters of the AC-coupled link. The method further includes extracting predefined content from the corrected video signal, and adjusting the transmission parameter based on a comparison of the extracted predefined content with certain expected content, so that adjusted transmission parameter can be used for one or more subsequent applications of the filter, thereby realizing an adaptive filter.

Abstract: In an actuator driver array, each actuator driver includes a transition stage to initiate a state change of a driver output signal, a static stage to maintain the state change, and an isolation resistor to couple the driver output signal to an output node of the actuator driver during a static mode. In an array of pad capacitors, each pad capacitor has: a first terminal at a connector pad communicatively coupled to the output node; and a second terminal coupled to an RF ground rail. The isolation resistor and the pad capacitor form a low-pass filter to filter RF harmonics from a respective actuator driver to respective actuator circuitry, and to filter RF energy generated outside of the respective actuator driver to its output node. In an RF actuator array, a state of each element is controllable by a corresponding actuator driver in the actuator driver array.

Abstract: There is disclosed a controller (112) for a power electronic network element (110) of a power transmission network (100), wherein the controller (112) is configured to vary a control parameter of the network element (110) which at least partly determines a ripple profile in a transmission line of the network. The controller (112) is configured to vary the control parameter between at least a first value and second value to cause the ripple profile in the transmission line to change; and the controller is configured to vary the control parameter periodically or in response to a signal indicating a threshold temperature at a hotspot location along the transmission line. A method of optimising control parameters for a power transmission network (100) is also disclosed.

Abstract: A microwave generating system includes a modular architecture which is configurable to provide power output from under 1-kilowatt to over 100-kilowatts. The various power levels are achieved by combining the RF outputs of multiple RF power amplifiers in a corporate structure. The system can be used on any ISM band. Each system component incorporates a dedicated embedded microcontroller for high performance real-time control response. The components are connected to a high speed digital data bus, and are commanded and supervised by a control program running on a host computer.

Abstract: A method for correcting antenna phases includes a beam angle calculating step, beam angle adjusting step, antenna emission measuring step and beam angle correcting step. The method involves comparing a difference between the ideal antenna phase value and the measured beam angle value, determining according to the difference that the beam direction of the antenna needs to be corrected, and adding the difference to a current ideal antenna phase value in the algorithm to calculate another ideal antenna phase value for being sent to the phase control circuit and used in executing the beam angle adjusting step in a next instance of measurement process until the beam angle correcting step finds the difference which requires no correction of the beam direction of the antenna. Therefore, temperature-dependent errors do not occur to beam directions, thereby enhancing the communication efficiency of an antenna system.

Abstract: Methods and devices suitable for monitoring the frequency of microwave tunable filters in real time. The frequency readout relies on the natural response of such a filter when excited by a pulse. Methods of measuring an operating frequency of a pole in a tunable filter include measuring a number of cycles in a natural response in the filter when the filter is excited by an electric current pulse, and determining a resonance frequency based on the number of cycles measured in the natural response. Such a method can provide the operating frequency information in a binary digital format, making it relatively easy to read and process. A measuring resonator may be mounted to the filter resonator and connected by a common actuator.

Abstract: An automatic RF filter tuning system and a method for manufacturing a filter using the same are disclosed. An RF filter tuning system for tuning an RF filter that includes a plurality of cavities having resonance elements and a cover having tuning areas that are positioned correspondingly to the resonance elements, includes a measuring unit configured to measure resonance characteristics of the cavity of the RF filter, a control unit configured to calculate a tuning value of the RF filter based on the resonance characteristics, and a tuning unit configured to tune the RF filter based on the tuning value calculated by the control unit. The tuning unit includes a striking unit configured to strike the tuning area of the cover of the RF filter, thereby adjusting the resonance value and tuning the RF filter.

Abstract: An apparatus including an antenna; a first part including a first ground plane portion; a second part including a second ground plane portion; a first electrical connection between the first part and a second part; and a second electrical connection between the first ground plane portion and the second ground plane portion that includes a reactive component.

Abstract: A system for remotely measuring antenna input impedance utilizing an automatic antenna tuner in which, for any tuner, the tuner input impedance may be established by the values of the components in the circuit at the time that the SWR is at a minimum, with these values being automatically available in terms of the components that are switched in to achieve low SWR. Once having established the input impedance to the tuner, the complex conjugate of the tuner input impedance yields the antenna input impedance, with antenna input impedance sensed at full power at a position remote from the antenna input.

Abstract: Exemplary embodiments of the present disclosure are related to a wireless power resonator and method that includes a wireless power transmit element. The wireless power transmit element may include a substantially planar transmit antenna configured to generate a magnetic field and formed from a conductive trace including a plurality of distributed inductive elements along the conductive trace. The transmit element may further include a filter formed from selected ones of the plurality of distributed inductive elements of the planar transmit antenna and configured to generate at least one frequency response.

Abstract: In an actuator driver array, each actuator driver includes a transition stage to initiate a state change of a driver output signal, a static stage to maintain the state change, and an isolation resistor to couple the driver output signal to an output node of the actuator driver during a static mode. In an array of pad capacitors, each pad capacitor has: a first terminal at a connector pad communicatively coupled to the output node; and a second terminal coupled to an RF ground rail. The isolation resistor and the pad capacitor form a low-pass filter to filter RF harmonics from a respective actuator driver to respective actuator circuitry, and to filter RF energy generated outside of the respective actuator driver to its output node. In an RF actuator array, a state of each element is controllable by a corresponding actuator driver in the actuator driver array.

Abstract: The present subject matter relates to tunable antenna systems and methods in which a tunable band-stop circuit is provided in communication between a signal node and an electrically small antenna having a largest dimension that is substantially equal to or less than one-tenth of a length of a wavelength corresponding to a frequency within a communications operating frequency band. The tunable band-stop circuit can be tunable to adjust a band-stop frequency.

Abstract: A system is described for maintaining an inductive-capacitive (LC) network at resonance while the excitation frequency may be varied between a number of discrete frequencies at desired instants controlled by a modulation input, while taking into account component parameter errors due environmental and ageing as well as manufacturing tolerances. Control of the resonance while the excitation frequency changes permits the transmission of frequency modulation (FM) or frequency shift keying (FSK) information through an inductively coupled power transfer system.

Abstract: There is provided a method, including obtaining information indicating at least one reference characteristic; obtaining input data, the input data relating to the output of the tunable filter; determining, based on the input data, at least one characteristic of the tunable filter; upon detecting that the at least one determined characteristic does not match with the at least one reference characteristic, determining tuning instructions for the tunable filter; and applying the tuning instructions in adjusting the tunable filter.

Abstract: The invention relates to an optoelectronic device for generating a frequency comb comprising a laser source (2), a ring microresonator (3) comprising a resonant ring (20) made of a third order optically non-linear material with abnormal dispersion regime. It also comprises a spectral tuning device comprising a junction guide (30) coupled to the resonant ring, electrical biasing means (40) adapted to apply an electrical voltage to the junction, and a control unit (42) adapted to modify the value of the electrical voltage until at least one dissipative temporal soliton is formed in the resonant ring.

Abstract: A calibration circuit and a method for calibrating a RC circuit, such as a high-pass filter, of an integrated circuit are provided. The calibration circuit comprises a filter arrangement having tuneable filter for filtering an input signal having a predetermined frequency. The filter comprises tuneable resistor elements, a saturation detector for detecting saturation and non-saturation of the tuneable filter by comparing a comparison voltage with the signal voltage of the filtered input signal, calibration control logic for providing incrementing and decrementing counter signals.

Abstract: Aspects of the subject disclosure may include, for example, a system that performs operations including receiving first electromagnetic waves on an outer surface of a transmission medium, detecting a degradation of a signal quality of the first electromagnetic waves due to first electric fields of the first electromagnetic waves inducing first currents in an obstruction disposed on the outer surface of the transmission medium, and generating second electromagnetic waves having second electric fields that induce second currents in the obstruction that are lower in magnitude than the first currents, the electromagnetic waves having a cutoff frequency. Other embodiments are disclosed.

Abstract: An apparatus including an antenna; a first part including a first ground plane portion; a second part including a second ground plane portion; a first electrical connection between the first part and a second part; and a second electrical connection between the first ground plane portion and the second ground plane portion that includes a reactive component.

Abstract: Microwave AC conductivity may be improved or tuned in a material, for example, a dielectric or semiconductor material, by manipulating domain wall morphology in the material. Domain walls may be created, erased or reconfigured to control the AC conductivity, for example, for crafting circuit elements. The density and placement of domain walls may increase or decrease the AC conductivity and may control AC conduction pathways through the material. An electric potential applied to the material's surface may create a desired pattern of domain walls to meet desired AC conductivity criteria. Incline angle of the domain walls may be modified relative to a crystallographic axis of the material to temporarily or permanently modify or gate AC conductivity of the material. For example, the AC conductivity of the material may be gated by domain wall incline angle to increase, decrease or throttle current flowing through the material for an electronic circuit element.

Abstract: A biological body state estimation device configured such that a homeostatic function level is sorted and acquired in plural stages by using a biological signal obtained from an upper body of a person and each stage of the homeostatic function level is plotted in time series in accordance with a time axis indicated on the lateral axis and displayed as a graph by a display. A highest part on the vertical axis of the graph can be displayed as a highly active state and a lowest part as a function decline state. Therefore, a state of fluctuation due to autonomous nerves as an attempt to maintain homeostasis, progress of a feeling of fatigue, and a state stimulated by activation of the brain can be captured as a periodic function. Moreover, a sleep prediction phenomenon can be captured.

Abstract: A circuit for blocking undesired input direct current of AC-coupled broadband circuits. The circuit includes a capacitor coupled to an input port and a common node. The input port receives a RF input signal. Additionally, the circuit includes a current source supplying a DC current to the common node leading a bias current to an output port. Further, the circuit includes a variable voltage source through an internal load and a close loop with an application circuit having an input load coupled to the output port to determine various bias voltages to control the bias current at the output port in association with a RF output signal that is substantially free of any input direct current originated from the RF input signal and is associated with an inherent low cut-off frequency independent of the various bias voltages.

Abstract: An automatic RF filter tuning system and a method for manufacturing a filter using the same are disclosed. An RF filter tuning system for tuning an RF filter that includes a plurality of cavities having resonance elements and a cover having tuning areas that are positioned correspondingly to the resonance elements, includes a measuring unit configured to measure resonance characteristics of the cavity of the RF filter, a control unit configured to calculate a tuning value of the RF filter based on the resonance characteristics, and a tuning unit configured to tune the RF filter based on the tuning value calculated by the control unit. The tuning unit includes a striking unit configured to strike the tuning area of the cover of the RF filter, thereby adjusting the resonance value and tuning the RF filter.

Abstract: A terahertz image matrix sensor including a matrix of pixels and comprising, for each pixel, an antenna for receiving a terahertz radiation modulated by a signal at a modulation frequency and a synchronous filter with N pathways, where N is an integer greater than or equal to 4, each pathway including a capacitive element and at least one first breaker controlled by a first signal at said modulation frequency.

Abstract: Provided are communication devices having adaptable features and methods for implementation. One device includes at least one adaptable component and a processor configured to detect an external cue relevant to operation of the at least one adaptable component, to determine a desired state for the at least one adaptable component corresponding to the external cue, and then to dynamically adapt the at least one adaptable component to substantially produce the desired state. One adaptable component comprises at least one adaptable speaker system. Another adaptable component comprises at least one adaptable antenna.

Abstract: An implantable medical assist device includes a medical device. The medical device has a housing and electronics contained therein. A lead provides an electrical path to or from the electronics within the medical device. A resonance tuning module is located in the housing and is connected to the lead. The resonance tuning module includes a control circuit for determining a resonant frequency of the implantable medical assist device and an adjustable impedance circuit to change the combined resonant frequency of the medical device and lead.

Abstract: According to an embodiment, a control apparatus includes a shaper and a compensator. The shaper receives a first target value in position control of a controlled object and generates a second target value which changes substantially rampwise over a time equal to or shorter than a period corresponding to one of resonance frequencies of the controlled object until the second target value becomes equal the first target value. The compensator compensates for a control signal, used for controlling the controlled object, based on the second target value.

Abstract: A device and method for post-fabrication trimming of an optical ring resonator using a dopant-based heater is provided. An optical ring resonator at the device can be heated using heaters in an optical slab from which the optical ring resonator extends, the heater including a non-uniform doping profile. A controller determines an initial resonance frequency and a target resonance frequency of the optical ring resonator. The controller applies predetermined electrical parameters to the heater using electrical connections to shift a resonance frequency of the optical ring resonator from the initial resonance frequency to the target resonance frequency by causing the dopant in the heater to migrate.

Abstract: An evanescent-mode cavity filter with an improved MEMS tuner design is disclosed. The MEMS tuner design allows for the independent control of individual poles in a multi-pole filter, which increases the adaptability of the filter in a crowded RF environment. The filter is further designed to minimize tuning voltages and hysteresis effects. A closed loop control system provides highly responsive tuning of the filter. The closed loop control allows for accurate and stable tuning that compensates for temperature and vibrational effects, while the tuner design enables fast tuning and significantly increases the resolution of the feedback measurement by eliminating charge buildup in the tuner substrate.

Abstract: An inductor-capacitor (LC) filter designed to comply with EMC (Electromagnetic Compatibility) standards comprises capacitors; switches for coupling capacitors; differential-mode inductors for coupling capacitors and switches; and common-mode inductors or a combination of differential-mode inductors and common-mode inductors, where an input signal changes the inductance of differential-mode inductors in the LC filter to modify a frequency response of the LC filter. In the LC filter, differential-mode inductors further comprise identical multiple-winding inductors, and the input signal, which biases the plurality of differential-mode inductors, includes a DC signal or a combination of DC and AC signals. A corner-frequency of the LC filter is adjusted and approximated as: fc=1/(2×pi×sqrt(L×C)), where fc is the corner-frequency, L is a composite value of inductance, and C is a composite value of capacitance.

Abstract: Systems and methods for provided for reducing interference caused by leakage of signals generated by a spread spectrum phase lock loop (SS PLL). Output of SS PLL may be processed to reduce interference. For example, a sinusoidal spreading signal may be used to spread the output of the SS PLL. A notch filter tracks the frequency of the output of the SS PLL to steer the notch in the filter to the instantaneous frequency output from the SS PLL, thus allowing the notch filter to be placed in the path of signals that have unwanted leakage from the SS PLL.

Abstract: RF communications circuitry, which includes a first RF filter structure and RF detection circuitry, is disclosed. The first RF filter structure includes a first group of RF resonators, which include a first pair of weakly coupled RF resonators coupled to a signal path of a first RF signal. One of the first group of RF resonators provides a first sampled RF signal. The RF detection circuitry detects the first sampled RF signal to provide a first detected signal. The first RF filter structure adjusts a first filtering characteristic of the first RF filter structure based on the first detected signal.

Abstract: Disclosed are a common mode filter and a manufacturing method thereof. The common mode filter in accordance with an aspect of the present invention includes: a substrate; a filter layer including a coil and a dielectric layer and disposed on the substrate and configured to remove a signal noise; and a magnetic layer being laminated on the filter layer, and a surface of the filter layer being joined with the magnetic layer can be formed to be flat by having the coil embedded in a surface of the filter layer being joined with the magnetic layer in such a way that one surface of the coil is exposed.

Abstract: External device circuitry self-tunes so that current is being driven through a coil at a resonant frequency of the tank circuit including the coil. The self-tuning nature of the driver circuitry enables adaptation within a cycle to changes in the resonant frequency such as those due to changing loads on the coil from environmental factors. The self-tuning circuitry monitors the direction of current flow in the tank circuit so that during a non-driven phase of a two-phase cycle, the circuitry detects the current naturally changing directions and then activates the driver circuitry to drive current into the tank circuit in phase with the natural direction of current flow. Unity power factor is approximated while driving the coil despite changes in resonance. Power being driven into the tank circuit may then be measured at the approximation of unity power factor to control the amount of power being applied.