Abstract: A wideband RF choke circuit includes an input, first and second nodes, and a splitting means coupled between the input, first node, and second node. A first all-pass filter and a first line AC blocker are coupled between the input and the splitting means. Second and third all-pass filters, and second and third line AC blockers, are coupled between the splitting means and the first and second nodes, respectively. A first RF choke has a first end, coupled to the first all-pass filter, and a second end. A second RF choke has a first end, coupled to the second end of the first RF choke, and a second end coupled to the second all-pass filter. A third RF choke has a first end, coupled to the second end of the first RF choke, and a second end coupled to the third all-pass filter.

Abstract: A front end radio frequency (RF) module including one or more first filter circuits configured to implement a front end function by filtering first signals communicated between one or more first antenna and a transceiver and one or more second filter circuits configured to implement at least a portion of an additional network function within the front end RF module by filtering second signals communicated between one or more second antennas and the transceiver.

Abstract: A wireless communication system includes: a first sub-system including a first radio and a second radio, each including a transceiver or a receiver; and a second sub-system coupled to the first sub-system and including: a first antenna configured to convey signals; a first tuner coupled to the first antenna; and a controller coupled to the first tuner, the controller being configured to cause the first tuner to adjust a characteristic of the first tuner; where the controller and/or the first tuner is configured to provide, to the first sub-system, an indication of an effect on operational performance of a portion of the second sub-system coupled to the second radio based on operation of the first tuner or the first antenna, or a combination thereof; where the first sub-system is configured to modify operation of the second radio based on the indication of the effect on operational performance.

Abstract: In an embodiment, an electronic device may include a housing having an inner space, a first printed circuit board including a wireless communication circuit, an antenna structure connected to the wireless communication circuit through a first electrical path, and a tunable circuit having a first resistance value and disposed on a second electrical path. The electronic device may further include a low-resistance circuit disposed on a third electrical path branched from the second electrical path, and including a resistor and an inductor, the resistor having a second resistance value determined based on the first resistance value, and the inductor having a constant inductance value and disposed between the resistor and the ground. The electronic device may also include at least one processor configured to control the tunable circuit.

Abstract: Provided is a radar device including a clock generator, a transmitter, and a receiver. The clock generator may output a transmission clock, and output a reception clock after a delay from a time at which the transmission clock is output. The transmitter may include a transmission trigger signal generator to generate a transmission trigger signal based on the transmission clock and an oscillator configured to generate a first signal on the basis of the transmission trigger signal. The first signal and the transmission trigger signal may include a pulse, and a width and a magnitude of the pulse included in the first signal correspond to a width and a magnitude of the pulse included in the transmission trigger signal, respectively. The receiver may be configured to receive an echo signal corresponding to the first signal to generate a second signal based on the reception clock.

Abstract: A method comprises activating an interval timer to expire in a calibration time interval and, in response to the timer expiring, performing an impedance analysis of an electronic network. The impedance analysis can use time-domain reflectometry. Based on the analysis, the method can calibrate a variable impedance device to have a first impedance and re-activate the timer. The method can perform a second impedance analysis based on calibrating the variable impedance device. The method can include determining a drift rate and modifying the calibration time interval. The variable impedance device can comprise a phase-change material (PCM), and the time interval can correspond to a retention time of the PCM and/or a dynamic drift rate. A system comprising a segment of an electronic network, a timer, a variable impedance device, and an impedance tuning system can embody operations of the method.

Abstract: A tunable inductor arrangeable on a chip or substrate comprises a first winding part connected at one end to a first input of the tunable inductor arrangement, a second winding part connected at one end to the other end of the first winding part, a third winding part connected at one end to a second input of the tunable inductor arrangement, a fourth winding part connected at one end to the other end of the third winding part, and a switch arrangement arranged. The switch arrangement tunes the tunable inductor by selectively connecting the first and fourth winding parts in parallel and the second and third winding parts in parallel, with the parallel couplings in series between the first and second inputs, or connecting the first, second, fourth and third winding parts in series between the first and second inputs. Corresponding transceivers, communication devices, methods and computer programs are disclosed.

Abstract: Various embodiments of the present invention relate to an electronic device including an antenna impedance matching circuit. The electronic device may comprise: at least one interface; at least one detection circuit for detecting a connection of at least one external device to the at least one interface; at least two matching circuits; an antenna; and a switch module for receiving, from the at least one detection circuit, at least one signal corresponding to whether the at least one external device is connected to the at least one interface, and for connecting the antenna to a matching circuit, among the at least two matching circuits, corresponding to the at least one signal. Various other embodiments are also possible.

Abstract: One example discloses a near-field wireless device, including: a near-field antenna; a variable current source; a controller coupled to the near-field antenna and the variable current source; wherein the controller is configured to measure a transmit quality-factor (Qtx) of the near-field antenna; and wherein the controller is configured to increase current sent by the variable current source to the near-field antenna if the measured Qtx is lower than a minimum Qtx.

Abstract: A wireless communication method includes: storing antenna-pair set information and a first measurement result in association with each other for every positional-arrangement, the antenna-pair set information being information on a set of pairs of transmission antennas and reception antennas that achieves a best throughput for the positional-arrangement, the first measurement result being a measurement result of reception characteristics of a training signal transmitted from at least one of the plurality of transmission antennas; selecting current antenna-pair set information corresponding to a current positional-arrangement by comparing a second measurement result with the first measurement result stored, the second measurement result being a measurement result of reception characteristics of the training signal measured at the plurality of reception antennas in the current positional-arrangement; and establishing links between the plurality of transmission antennas and the respective plurality of reception a

Abstract: This specification discloses methods and systems for controlling a NFC (near field communication) transmitter output with enhanced accuracy. This is achieved by first doing a device and/or system level calibration of the Tx (transmitter) by testing at the device and/or system level. Then using the testing results to generate a set of Tx calibration data, which will be used by a Tx control unit to control the Tx outputs (such as Tx output power, Tx output voltage, Tx output current, etc.) with enhanced accuracy. In some embodiments, the Tx control unit controls the Tx output with enhanced accuracy by using the Tx calibration data to tune one or more of the following: (i) Tx supply, (ii) Tx driver, (iii) matching network.

Abstract: A lifestyle service with data and routines storable in a memory of a wearable electronic device is discussed. The lifestyle service has at least a Sleep data routine and an Activity data routine. The lifestyle service can cooperate with an insight engine. The lifestyle service is aware of different types of information contained in one or more time synchronous applications. The system can compare tracked physical activity data with historical data in set increments in light of the information in the time synchronous applications and then communicate notifications to the user.

Abstract: A method implemented in a user equipment (UE) includes receiving a first reference signal (RS) from a first transmit antenna port and performing channel estimation based on the first RS. The method also includes obtaining an indication that the first RS and a second RS share a spatial property and receiving the second RS from a second transmit antenna port. The method further includes inferring the shared spatial property for the second RS based on the indication and performing channel estimation based on the second RS using the inferred spatial property.

Abstract: The communication device includes a switching controller. In a case where the communication band to be used is a second frequency band between a second lower edge frequency and a second upper edge frequency or in a case where the communication band to be used is a first frequency band between a first lower edge frequency and a first upper edge frequency and a frequency of the signal to be used is included in a first passband, the switching controller controls a filter switcher to switch to a first filter. In a case where the communication band to be used is a third frequency band between a third lower edge frequency and a third upper edge frequency or in a case where the communication band to be used is a first frequency band and the frequency of the signal to be used is included in a second passband, the switching controller controls the filter switcher to switch to a second filter.

Abstract: The present invention generally relates to cellular phones having multiple antennas. The invention relates to how two antennas in a diversity or MIMO antenna system interact through mutual coupling. The mutual coupling is due to proximity of the two antennas, their antenna pattern and efficiency. The performance of the system can be optimized by adjusting the mutual coupling between the antennas. The primary and secondary antennas can be “tuned” and “de-tuned” respectively to enhance system performance. In this invention, the primary and secondary antennas are tuned independently using MEMS capacitor configured in the antenna aperture for frequency tuning.

Abstract: In an approach to locating nearby computing device users to participate in a fitness activity, one or more computer processors receive from a first computing device of a first user, a selection of a fitness activity and a request to locate at least one second computing device associated with at least one second user in a vicinity of the first computing device to join in a fitness activity. The approach includes one or more computer processors determining the at least one second computing device associated with the least one second user is located in the vicinity of the first computing device. Furthermore, the approach includes one or more computer processors determining directions for the first user and the at least one second user to meet.

Abstract: A RF transceiver for RF communication with a further RF transceiver is described. The RF transceiver comprises a RF transmitter; a clock generator coupled to the RF transmitter, the clock generator comprising a crystal oscillator circuit including an amplifier, a distance monitor configured to monitor the distance between the RF transceiver and the further RF transceiver; a controller coupled to the distance monitor and the clock generator. The controller is configured to vary the crystal oscillator swing amplitude dependent on the distance between the RF transceiver and the further RF transceiver.

Abstract: There is disclosed a mobile terminal including a housing comprising a first metal case, a second metal case and a first non-conductive case arranged between the first metal case and the second metal case, a battery embedded in the housing, a first coil arranged in an area covered by the first metal case inside the housing, a main board comprising a charging module implemented to recharge the battery using electric currents which flow in the first coil, and a first resonator arranged in an area covered by the first non-conductive case and comprising a first matching circuit corresponding to a first frequency, such that the examples of the mobile terminal in accordance with the present disclosure may enhance performance of the wireless communication unit and wireless charging performance, without design change of the housing having the metal case.

Abstract: In accordance with embodiments of the present disclosure, a wireless network interface may include a transmit/receive path comprising an antenna for transmitting and receiving wireless transmissions and a baseband controller communicatively coupled to the transmit/receive path and configured to receive fused sensor information indicative of environmental conditions detected by a plurality of sensors and, based on the fused sensor information, tune one or more parameters of the transmit/receive path.

Abstract: A circuit for tuning an impedance matching network is disclosed. The circuit includes a current sensor, a control circuit coupled to the current sensor and a reference current source and a tunable capacitor coupled to the control circuit. The control circuit is configured to generate a control signal based on an output of the current sensor, wherein the control signal is configured to vary a capacitance of the tunable capacitor.

Abstract: Switching apparatus for use in RF transmission systems. The apparatus comprises first and second RF signal inputs, each coupled to an RF signal path including a coupler directing a portion of input RF signal power to corresponding first and second RF signal outputs. The apparatus includes an RF signal switching arrangement having a control input, a switch output, a first switch input coupled to the first RF signal path, a second switch input coupled to the second RF signal path, and the RF signal switching arrangement is operable by the control input to selectively connect the first or second switch input to the switch output. An RF signal monitoring output is coupled to the switch output, and a processor is configured to receive a switch command input and generate a switch control signal which is adapted to configure the RF signal switch arrangement in accordance with the switch command input.

Abstract: According to an embodiment, a transmission circuit is configured to transmit a signal to a reception circuit through a transmitting AC coupling element. The transmitting AC coupling element is AC coupled to a receiving AC coupling element. The transmission circuit includes a drive signal generation circuit and a drive circuit. The drive signal generation circuit is configured to generate a drive signal in synchronization with a transmission signal to be transmitted. The drive circuit is configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance. The drive circuit is configured to apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period.

Abstract: An embodiment of a method for adaptive multi-antenna selection, executed by an AP (access point), which contains at least the following steps. After a data transmission request or a data receipt request is received from a client station, it is determined whether the client station is the first time connected client station within a predetermined time interval. If the client station is the first time connected client station, a first antenna combination is selected to transmit/receive data with the client station using a first antenna selection procedure. If the client station is not the first time connected client station, a second antenna combination is selected to transmit/receive data with the client station using a second antenna selection procedure.

Abstract: The present invention is a novel and useful RF transformer based transmit/receive (TX/RX) integrated RF switch. In one embodiment of the invention, the TX/RX RF switch circuit is based on the use of an RF transformer which functions as (1) the PA output transformer during TX mode and (2) as a series inductance in an LNA matching network during receive mode. Thus, the RF transformer plays a dual function or role. Antenna diversity is achieved by having multiple antennas each having an associated antenna switch connected to the output transformer. The TX/RX switch of the invention reduces the number of switches required for antenna diversity to a minimum and minimizes RF losses in the system. The TX/RX switch is suitable for use with modern wireless communication standards such as DECT, 802.11 WLAN, Bluetooth, ZigBee, etc. The configuration of the TX/RX circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes.

Abstract: A self-calibrating antenna system having a radio frequency (RF) detector configured to estimate a time delay of a transmission signal on a transmission line, which couples an RF front end with an antenna tuner, based on a magnitude and phase of an input impedance of the transmission line at a first set of a plurality of respective frequencies, and a transceiver configured to transmit to the antenna tuner a calibrated tuning control command based on the estimated time delay to calibrate the antenna tuner and the transmission line.

Abstract: Systems and methods for calibrating antenna tuner device parameters can involve measuring a first signal level of an antenna tuner device, adjusting a tuning setting of the antenna tuner device, measuring one or more adjusted signal levels of the antenna tuner device, determining a level change between the first signal level and the one or more adjusted signal levels, comparing the level change to a predefined reference level change, and adjusting a device setting of the antenna tuner device to compensate for a difference between the level change and the predefined reference level change.

Abstract: There is provided a system that includes a tunable amplification module, a coupler, an interface module; a detector that is arranged to output an impedance indicative signal and a power indicative signal; wherein the impedance indicative signal is indicative of an impedance mismatch between an output impedance of the tunable amplification module and an impedance of a radio frequency (RF) antenna as seen by the tunable amplification module, wherein the power indicative signal is indicative of an output power of the tunable amplification module.

Abstract: In a communication circuit, an RFIC includes an IO terminal and a control IC includes an IO terminal. A variable capacitance element includes control terminals, a capacitance element with a capacitance value that is determined according to a control voltage, and a resistance voltage divider circuit configured to generate the control voltage by dividing a voltage inputted to the control terminals. One of the RFIC and the control IC supplies control data to the variable capacitance element via a signal line. The variable capacitance element, along with an antenna coil, constitutes an antenna circuit of an LC parallel resonance circuit, and sets a resonant frequency of the antenna circuit to be a predetermined frequency.

Abstract: In a wireless communication device (10), adjustment means (matching controlling means (152)) changes a reactance of a matching section (17), determination means (calculation means (151), matching controlling means (152)) determines whether a resonance frequency of an antenna (11) exists on a side higher than or lower than the operation frequency of the antenna (11) on the basis of a change in an intensity of a signal, which change is caused by a change in the reactance and is detected by a signal intensity detection section (14), and the adjustment means adjusts the reactance so that the resonance frequency is closer to the operation frequency on the basis of a result of determination of the determination means.

Abstract: A radio-frequency (RF) device for a wireless communication device includes a grounding element, an antenna, a first DC blocking element for cutting off a direct-current (dc) signal route between a grounding terminal of the antenna and the grounding element, a capacitive sensing unit capable of using a radiating element of the antenna to sense an environment capacitance within a specific range, a second DC blocking element electrically connected between the radiating element and the feed-in element for blocking a dc signal path from the radiating element to the feed-in element, and a high-frequency blocking element electrically connected between the radiating element and the capacitive sensing unit for blocking a high-frequency signal path from the radiating element to the capacitive sensing unit.

Abstract: Optical communications system (10) and method for transmission of payload data (PD) from a low earth orbit satellite (20) to an optical ground terminal (30), the low earth orbit satellite (20) being connectable with the optical ground terminal (30) via an optical downlink channel (DL), and the optical ground terminal (30) being connectable with the low earth orbit satellite (20) via an uplink channel (UC); wherein said uplink channel (UC) is an acquisition and tracking beacon channel by means of a ground beacon (GB) controlled by a point-acquisition-track subsystem (PAT), the ground beacon (GB) comprising a wide angle beam (W) for acquisition and a guidance beam (G) for tracking; and wherein the ground beacon (GB) for the uplink channel (UC) is a pulse position modulated PPM channel.

Abstract: A system is disclosed for monitoring of individual frequency channels in an RF signal band by configuration of the electronic processor to operate the tunable filter to select desired channel sub bands. Measurement of forward and/or reverse-propagating fields within the selected sub-bands may be performed and corresponding power levels recorded. The records may be used to provide monitoring signals, such as measures of forward and reflected power, as well as VSWR, return loss. Indications or alarms may be activated if any of these quantities, associated with any one or more channels, falls outside a predetermined acceptable operating range.

Abstract: A mobile terminal is provided that includes front and rear cases, an intermediate case between the front and rear cases, and a printed circuit board between the intermediate cases and at least one of the front and rear cases. A shielding member having a first width, length and thickness, and being formed of a metal. Non-conductive material may have a second thickness attached to at least two edges of the shielding member.

Abstract: Methods and systems for a touchscreen interface utilizing leaky wave antennas (LWAs) are disclosed and may include configuring one or more leaky wave antennas utilizing conductive traces in the touchscreen interface for communication of wireless RF signals. RF signals may be communicated utilizing the configured LWAs. A resonant frequency of the LWAs may be configured utilizing micro-electro-mechanical systems (MEMS) deflection. The LWAs may be configured to communicate the RF signals in a desired direction. The LWAs may comprise microstrip or coplanar waveguides, where a cavity height of the one or more leaky wave antennas is dependent on spacing between conductive lines in the waveguides. The touch control commands by the touchscreen interface may be sensed utilizing capacitance, inductance, and/or resistance measurements.

Abstract: The specification and drawings present a new method, apparatus and software related product for antenna clustering for multi-antenna aperture selection (MAAS), e.g., in LTE wireless systems, using multi-core DSP processing with sub-optimum selection of N out of M of antenna signals and minimizing the performance degradation due to the sub-optimal antenna/antenna signal selection. Assigning each DSP core (machine) to N/K antennas (i.e., to antenna signals) having a similar property (e.g., polarization) and a same tier, the selection of N out of M using a predefined criterion (e.g., best SINR) is reduced to selecting N/K out of M/K which reduces the computation complexity by a factor of K, where K is a number of the DSP cores.

Abstract: A method for wireless communication is provided and may include configuring at least one capacitor array in an antenna system to control a frequency for receiving external signals. An antenna and at least one inductor in the antenna system may be configured for receiving external signals at a first frequency. An inductor and a voltage source, a capacitor, and/or a ground reference may be configured for receiving the external signals at a different frequency if the frequency is utilized for backscattered signal reception and/or magnetically coupled signal reception. Near field communication (NFC) signals may be received at the different frequency for backscattered signals. Radio frequency identification (RFID) signals may be received at the different frequency for magnetically coupled signals. The first frequency may be within the FM frequency band. The antenna system may be configured to transmit signals to be subsequently received as backscattered signals or magnetically coupled signals.

Abstract: An apparatus and method for controlling a multi-band antenna in a mobile communication terminal are provided. An apparatus for controlling a multi-band antenna in a mobile communication terminal includes a modem, an antenna unit, a Radio Frequency (RF) processing unit, and a switch module. The modem outputs at least one control signal corresponding to a target frequency band. The antenna unit changes a resonance frequency of the antenna according to the at least one control signal. The RF processing unit includes a plurality of transmission/reception (TX/RX) paths and processes TX/RX signals. The switch module connects the antenna to one of the TX/RX paths according to the at least one control signal.

Abstract: There is provided a system that includes a tunable amplification module, a coupler, an interface module; a detector that is arranged to output an impedance indicative signal and a power indicative signal; wherein the impedance indicative signal is indicative of an impedance mismatch between an output impedance of the tunable amplification module and an impedance of a radio frequency (RF) antenna as seen by the tunable amplification module, wherein the power indicative signal is indicative of an output power of the tunable amplification module.

Abstract: Methods and systems for dynamically tuning and calibrating an antenna using on-chip digitally controlled array of capacitors are disclosed. Aspects of one method may include dynamically tuning a mobile terminal antenna (MTA) using on-chip arrays of capacitive devices. The tuning may be, for example, to compensate for center frequency drift during operation of the mobile terminal. The tuning may be accomplished by selecting capacitive devices in the on-chip arrays of capacitive devices to use in conjunction with an inductive circuit coupled to the MTA, where the inductive circuit may be either off the chip or on the chip. Accordingly, an impedance of the circuit formed by the capacitive devices in the on-chip arrays of capacitive devices and the inductive circuit may be adjusted with respect to the MTA. A valid circuit configuration may include a configuration where no capacitive device may be selected for use with the inductive circuit.

Abstract: Methods for reducing power dissipation from an input power source in a telecommunications system are disclosed. In one embodiment the method includes: utilizing a first I2C device to monitor an input voltage and input current to a remote unit; providing the input voltage and input current to a main microprocessor for calculating an input power; utilizing a second I2C device to monitor an output voltage and output current from the remote unit; providing the output voltage and output current to the main microprocessor for calculating an output power; calculating a power efficiency of the remote unit at the main microprocessor based on the input power and the output power; utilizing a third I2C device to provide the power efficiency of the remote unit to a digital power manager; and utilizing the digital power manager to control the DA trim output to a DC/DC converter.

Abstract: A data processing apparatus is arranged to map input data symbols to be communicated onto a predetermined number of sub-carrier signals of Orthogonal Frequency Division Multiplexed OFDM symbols. The predetermined number of sub-carrier signals is determined in accordance with one of a plurality of operating modes and the input data symbols are divided into first sets of input data symbols and second sets of input data symbols.

Abstract: A router module is arranged in a housing of a smart television. The router module is externally connected to a modem for surfing the Internet. The router module is electrically connected to a micro processing unit of the smart television. Therefore, the smart television is connected to the Internet through the router module. A wireless transmission chip of the router module is configured to process Internet signals. An antenna module is configured to wirelessly transmit the Internet signals, so that wireless network is shared to outside.

Abstract: An antenna is provided having a good matching characteristics when immersed in a fluid such as saline water, oil, or other liquids (“the phantom liquid”). In some embodiments, the antenna provides a tight capacitive coupling with the phantom liquid through the use of a higher permeability cover and absence of a gap between the cover and the antenna body. One embodiment employs a tunably capacitively loaded inverted “F” antenna structure. Additional embodiments of the invention provide an antenna tuning system that saves power by utilizing very low duty cycle periodical refreshing charge at a tuning varactor diode coupled to the antenna.

Abstract: A bi-directional signal interface includes a first waveguide that propagates a first traveling wave. The first waveguide has one end that is coupled to a RF input port that receives a RF transmission signal and another end that is coupled to a RF bi-directional port that receives a RF reception signal and that transmits the RF transmission signal. A second waveguide is positioned proximate to the first waveguide. The second waveguide has one end that is coupled to an output port that passes the received RF reception signal. A non-reciprocal coupler couples fields from the first waveguide to the second waveguide so that the RF reception signal from the bi-directional port couples from the first waveguide to the second waveguide in a substantially non-reciprocal manner and then passes through the output port, and the RF transmission signal from the RF input port passes through the first waveguide to the RF bi-directional port.

Abstract: Methods and systems for a mesh network utilizing leaky wave antennas (LWAs) are disclosed and may include configuring one or more devices as a mesh network in a wireless device coupled to a plurality of LWAs, and communicating data between said devices via the configured mesh network. A resonant frequency of the LWAs may be configured utilizing micro-electro-mechanical systems (MEMS) deflection. A plurality of the LWAs may be configured to enable beamforming. The LWAs may comprise microstrip or coplanar waveguides, wherein a cavity height of the LWAs is dependent on spacing between conductive lines in the waveguides. The plurality of LWAs may be integrated in one or more of: integrated circuits, integrated circuit packages, and printed circuit boards. The devices may be internal to the wireless device. The data may be communicated via the mesh network to devices external to the wireless device.

Abstract: Methods and systems for power transfer utilizing leaky wave antennas (LWAs) are disclosed and may include configuring one or more LWAs in a communication device to receive RF signals that are communicated from one or more other LWAs that are external to the communication device. The communication device may be powered utilizing the RF signals that are received via the configured LWAs. A resonant frequency of the LWAs may be configured utilizing micro-electro-mechanical systems (MEMS) deflection. The LWAs may be configured to receive the RF signals from a desired direction. The LWAs may comprise microstrip or coplanar waveguides, wherein a cavity height of the LWAs is dependent on spacing between conductive lines in the waveguides. The LWAs may be integrated in integrated circuits, integrated circuit packages, and/or printed circuit boards. The packages may be affixed to printed circuit boards and the integrated circuits may be flip-chip-bonded to the packages.

Abstract: An impedance tuning and optimization technique is described wherein an impedance interface is dynamically tuned prior to applying transmit power to the circuit. A coupled signal injected into the antenna port is used to optimize the tuning state of a tuning component such that the impedance properties of the circuit are optimized prior to application of transmit power. A coupled or injected signal at an alternate frequency band can be utilized to determine tuning state or parameters at the frequency of interest by first tuning at the frequency of the coupled or injected signal and then accessing a data base containing information that relates tuning parameters across multiple frequency bands for various levels of antenna de-tuning. A time-savings is realized when the tuning circuit is optimized prior to activation or use of the transmit/receive path.

Abstract: A signal transmission channel using a SIW between a transmitter and distant receiver. The SIW may include a MSL/SIW interface, be flexible, may use plug connections and/or may operate in a MMW band.

Abstract: Methods and systems for amplitude modulation using a leaky wave antenna are disclosed and may include amplitude modulating an output of one or more power amplifiers in a wireless device by modulating a bias current in the power amplifiers that are coupled to one or more leaky wave antennas. The leaky wave antennas may include a balun that may be integrated on the chip, on a package to which the chip may be affixed, and/or integrated on a printed circuit board to which the chip may be affixed. An output power of the power amplifiers may be adjusted by configuring a bias voltage on the leaky wave antennas. The bias voltage may be configured utilizing a DC to DC voltage controller. The bias current may be modulated via one or more switched current sources. The switched current sources may be binary weighted and/or may be current mirrors.

Abstract: A time-variant antenna is disclosed that uses a switched capacitor array in silicon to improve the performance and integration options of the time-variant antenna. Parasitic effects of the interface between the on-board antenna and on-silicon switched capacitor array are considered and the antenna is tuned to compensate for these effects. The switched capacitor array provides high linearity, lower cost, and reduced size, relative to prior art antenna implementations.