Abstract: Systems and techniques for management of an antenna tuning frequency range. Frequency coverage needed for an antenna used in a portable communications device in a wireless communication network is determined based on communication protocols being used, with an active tuner being connected to a passively tuned antenna when a different frequency range is called for and with the active tuner being effectively isolated when only the range provided by the passively tuned antenna is needed to reduce the risk of RF mixing or intermodulation.

Abstract: A system that incorporates teachings of the subject disclosure may include, for example, emulating a behavior of an RF capacitive device utilizing a mirror circuit; and providing feedback signals to an input of an operational amplifier via a feedback node coupled with the mirror circuit. Other embodiments are disclosed.

Abstract: Electrodes are formed of a nonmagnetic metal in high-frequency electronic components that conduct high frequency electric current having a frequency included in any of a first frequency band for transmitting and a third frequency band for receiving, both assigned to a first transmitting/receiving unit for data communication, and a second frequency band for transmitting and a fourth frequency band for receiving, both assigned to a second transmitting/receiving unit for telephone communication. The high-frequency electronic components also restrict the frequency of the conducted electric current.

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: The present invention discloses a control method, an apparatus and a computer program for antenna tuner parameters of a radio transceiver. The updating moments of the antenna tuner parameters are selected depending on predominant interference status in the receiver. Based on the sensed interference level, an update decision is made whether the external interference is below a selected threshold value. The parameter change is executed only in low interference situations. In high interference levels (low SIR), the antenna tuner parameters are calculated but they are not enforced in the antenna tuner. The control process for updating the antenna tuner parameters is continuous in given time intervals.

Abstract: In an embodiment, a circuit device for coupling to an antenna includes a first impedance matching circuit configured to couple to the antenna and a second impedance matching circuit configured to couple to the antenna. The circuit device further includes a power amplifier coupled to the first impedance matching circuit and includes a low-noise amplifier coupled to the second impedance matching circuit. Additionally, the circuit device includes a selectable impedance adjustment circuit coupled between the low-noise amplifier and the second impedance matching circuit, which selectable impedance adjustment circuit is configured to selectively adjust an impedance associated with the low-noise amplifier when the power amplifier is transmitting a signal through the antenna.

Abstract: An antenna tuner provides a pass band with a transmission resonant frequency and a receive resonant frequency. In this manner, the pass band of the antenna tuner can simultaneously provide matching at both a transmission frequency and a receive frequency, when both transmission signals and receive signals are received on the same antenna. The antenna tuner includes a first capacitive element that is coupled to series resonate with the antenna and a low-pass pi network.

Abstract: A wireless communication apparatus includes: attenuators provided in wireless devices for attenuating an input level of a reception signal; a monitoring unit for monitoring communication states of the wireless devices; and a control unit that performs control to determine whether or not the input level of the reception signal of the wireless device to be controlled out of the wireless devices will be excessive because of a wireless communication to be performed by the second wireless device other than the wireless device to be controlled, based on the communication states of the wireless devices monitored by the monitoring unit and to attenuate the input level of the reception signal by operating the attenuator of the wireless device when determination is made that the input level of the reception signal will be excessive.

Abstract: A system that incorporates teachings of the subject disclosure may include, for example, identifying a usage mode of the communication device, running a calibration session that includes adjusting a starting point for tuning of the matching network based on a categorized history of previous tuning search paths and based on the usage mode where the categorized history of previous tuning search paths is generated based on monitoring previous tuning search paths during previous tuning and based on monitoring previous usage modes during the previous tuning, and adjusting a tuning search path for the tuning of the matching network based on the categorized history of previous tuning search paths and the usage mode where the adjusting of the starting point and the adjusting of the tuning search path reduces a tuning search time and provides a unique solution for the tuning. Other embodiments are disclosed.

Abstract: A wireless communication device uses operational parameters stored in a capabilities list to control operation of the device. The device may also provide auxiliary services, such as reception of broadcast television signals and location detection using network assisted GPS. When auxiliary services are selected, the cellular operation may cause interference with the auxiliary services. The wireless communication device includes a reduced set of capabilities to control operation of the wireless communication device when an auxiliary service is requested. The particular set of reduced capabilities may depend on the specific type of auxiliary service that has been requested. Upon termination of the auxiliary services, the full capabilities list may be restored and the operation of the wireless communication device is thereafter controlled by the full set of operational capabilities.

Abstract: A programmable radio communication system comprises a transmitter (1) and a receiver (2). The transmitter comprises radio transmitting means (5) and processing means (3).

Abstract: A matching circuit electronically connected between an antenna and a radio frequency (RF) module includes a first admittance circuit and a second admittance circuit. The first admittance circuit is electronically connected between the antenna and the RF module. The first admittance circuit is configured to adjust resonance frequencies of the antenna at multiple frequency bands by changing an admittance of the first admittance circuit. A first end of the second admittance circuit is electronically connected between the RF module and the first admittance circuit. A second end of the second admittance circuit is grounded. The second admittance circuit is configured to reduce the first admittance circuit from influence of high frequency signals.

Abstract: An embodiment of the present invention provides an apparatus, comprising a transceiver, an antenna tuner connecting said transceiver to an antenna, a power sensor adapted to acquire measurements about transmit power, a receive signal strength indicator (RSSI) adapted to acquire measurements about receive power and wherein said tuner tunes said antenna based upon said transmit and receive measurements to optimize said antenna in both the receive and transmit bands.

Abstract: An apparatus including a first port configured to receive signals from a transceiver and to receive a first antenna; a second port configured to receive signals from a transceiver and to receive a second antenna; a first reactive component coupled to the first port; a second reactive component coupled to the first reactive component at a first junction and to the second port, wherein at least the first reactive component is configured to have an impedance that shifts the phase of a first signal, in a second operational resonant frequency band, received from the first antenna, and the second reactive component is configured to have an impedance that shifts the phase of a second signal, in the second operational resonant frequency band, received from the transceiver, so that the first signal and the second signal at least partially destructively interfere with one another at the first junction.

Abstract: A front-end circuit for a wireless communication unit includes at least two antenna feeds. At least one of the antennas is coupled to an antenna switch. The circuit comprises filters and duplexers and is prepared to operate a number of FDD frequency bands. Each FDD band comprises an Rx band for receive signals and a Tx band for transmit signals. The circuit provides a single band operation mode for each frequency band and aggregated band operation modes. In an aggregated band operation mode Rx signals can be received in two different frequency bands at the same time as well as Tx signals can be transmitted in at least one of the two different frequency bands. In addition, TDD bands as well as GSM bands are covered.

Abstract: In systems and methods of reducing latency in a wireless communication system, a first signal of a first radio access technology and a second signal of a second radio access technology are received at a first antenna and a second antenna of a wireless device. From a first circulator the first signal received at the first antenna and the second antenna are received and combined to generate a combined first signal. In addition, from a second circulator the second signal received at the first antenna and the second antenna are received and combined to generate a combined second signal. While receiving the first signal of the first radio access technology, a call request is received over the second signal of the second radio access technology.

Abstract: An integrated circuit architecture and circuitry is defined by a die structure with a plurality of exposed conductive pads arranged in a grid of rows and columns. The die structure has a first operating frequency region with a first transmit and receive chain, and a second operating frequency region with a second transmit chain and a second receive chain. There is a shared region of the die structure defined by an overlapping segment of the first operating frequency region and the second operating frequency region with a shared power supply input conductive pad connected to the first transmit chain, the second transmit chain, the first receive chain, and the second receive chain, and a shared power detection output conductive pad connected to the first transmit chain and the second transmit chain.

Abstract: Custom antenna structures may be used to improve antenna performance and to compensate for manufacturing variations in electronic device antennas. An electronic device antenna may include an antenna tuning element and conductive structures formed from portions of a peripheral conductive housing member and other conductive antenna structures. The antenna tuning element may be connected across a gap in the peripheral conductive housing member. The custom antenna structures may be used to couple the antenna tuning element to a fixed custom location on the peripheral conductive housing member to help satisfy design criteria and to compensate for manufacturing variations in the conductive antenna structures that could potentially lead to undesired variations in antenna performance. Custom antenna structures may include springs and custom paths on dielectric supports.

Abstract: Devices are described herein that operate according to non-reciprocal behaviors. The devices may be manufactured and integrated into substrates and discrete components according to described techniques. The devices may be configured in ways to achieve increased device performance while decreasing the overall device size. The devices may be actively tuned to facilitate impedance matching with other circuit components such as power amplifiers. Tuning includes adjustment of magnetic fields and impedance values associated with the devices using techniques and components described herein and may be based upon changes in circuit or device parameters such as temperature, voltage, and current. The devices described herein may be configured as non-reciprocal devices that include ferrites with metallization patterns that may be in the form of microstrip circuitry or in stripline formats depending upon configuration.

Abstract: This invention provides a method and a terminal device for a multi-band antenna automatically tuning impedance matching, and belongs to the technical field of communication. The method includes: obtaining an operation current value and an output power value of a power amplifier upon transmitting a signal; obtaining a logical control parameter for controlling an antenna tuner based on the operation current value and the output power value, and adjusting the impedance matching of the antenna by using the logical control parameter. The efficiency for impedance matching of the antenna upon operating in the multi-bands may be improved, and the power saving can be better implemented under the condition of assuring the performance of the antenna.

Abstract: Tunable phase shifters and methods for using the same include a signal line; one or more grounding lines; one or more crossing lines below the signal line in proximity to the signal line and substantially perpendicular to a longitudinal direction of the signal line, where the crossing lines conform to the shape of the signal line along at least three surfaces of the signal line and where the crossing lines have a tunable capacitance; and an inductance return line below the crossing lines substantially parallel to the longitudinal direction of the signal line, where the inductance return line provides a tunable inductance.

Abstract: The present invention relates to devices, methods, mobile communication terminals, computer programs and storage mediums for frequency control. The frequency control device for a mobile communication terminal only uses one crystal oscillator, but can access different access networks at the same time. The frequency control device may control the output of the crystal oscillator based on a plurality of frequency offset estimation results and the service performance of access network corresponding to the frequency offset estimation results. Therefore, the flexibility of frequency offset control may be improved and better service may be provided to users.

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 tuning circuit disposed between an antenna and wireless network interface card selectively adjusts transmissions from the antenna to plural frequency bands, each band associated with wireless signals of a wireless network provider. A direct current bias selectively applies to tuning circuit analog components to adjust the frequency band as desired to support communication for a selected wireless provider.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a computer-readable storage medium having computer instructions to perform actual measurements of one or more performance parameters of a communication device according to a subset of tuning states of a tunable matching network operable in a communication device, determine estimated measurements of the one or more performance parameters of the communication device for a portion of the tuning states not included in the subset of tuning states according to the actual measurements, identify a data set for each of the one or more performance parameters from at least portions of the tuning states and the actual and estimated measurements, and determine from at least a portion of the date sets one or more tuning states that achieve at least one desirable performance characteristic of the communication device. Additional embodiments are disclosed.

Abstract: A cellular phone including a transceiver and a processing module. The transceiver receives, from a device separate from the cellular phone, a radio or intermediate frequency signal. The radio frequency signal has been tuned by the device to a selected frequency. The intermediate frequency signal is a downconverted version of the radio frequency signal. Each of the radio and intermediate frequency signals includes the content. The content has been frequency modulated and broadcast at the selected frequency prior to the transceiver receiving the radio or intermediate frequency signal. A processing module downconverts the radio or intermediate frequency signal to a baseband signal and converts the baseband signal to a digital signal. The processing module either forwards the digital signal for audio play out of the content at the cellular phone or forwards the digital signal to the transceiver for transmission of the digital signal back to the device.

Abstract: Devices and methods are disclosed for real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a receiver. Processing logic is operable to solve multiple non-linear equations to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit may then be adjusted to match the input impedance of the antenna.

Abstract: The disclosed invention relates to a transceiver system configured to cancel RF second-order intermodulation distortion (IMD2) within a differential reception path. In some embodiments, the transceiver system has one or more common-mode attenuation elements that attenuate common-mode interferer signals within the differential reception path. The common-mode attenuation elements detect a common-mode interferer from one or more nodes within a transceiver system front-end. One or more properties of the detected common-mode interferer are adjusted and then fed into the differential reception path, where the adjusted common-mode signal attenuates the common-mode interferers. In other embodiments, the differential reception path has a tunable amplifying stage. The tunable amplifying stage has first and second amplifier elements that are independently operated to intentionally introduce an operating parameter mismatch between the elements.

Abstract: A method and system configures a wireless communication device to support simultaneous signal propagation using a single narrow band antenna. An antenna tuner controller (ATC) configures a tunable low band matching circuit to provide a first antenna matching in order to support propagation of a low band signal with a first signal path. The ATC configures a tunable high band matching circuit to provide a second antenna matching which can support propagation of a high band signal within a second signal path. In addition, the ATC provides isolation between the tunable matching circuits, utilizing a diplexer circuit having a low band component coupled to the first signal path and a high band component coupled to the second signal path. The ATC simultaneously propagates the low and high band signals using a single, shared narrow band antenna coupled to the first and second signal paths.

Abstract: A method and apparatus for tuning an antenna of a communication device includes receiving, at a processing element within the communication device, data relevant to tuning the antenna and identifying an unreliable portion of the data. The method also includes identifying, based on the unreliable portion of the data, a first set of tuning states for tuning the antenna, wherein the first set of tuning states is a subset of a plurality of possible tuning states for tuning the antenna. The method further includes restricting tuning of the antenna to tuning states within the first set of tuning states.

Abstract: A communication device comprising at least first and second antennas wherein a quality of communication between the communication device 2 and a further device 20 is assessed when using the at least first and second antennas 8, 10, 12 so as to select one of the at least first and second antennas for further communications between the communication device and the further device.

Abstract: A method of controlling a resonance frequency of a Near Field Communication (NFC) device that includes a resonance unit to transceive data through an electromagnetic wave and an NFC chip may comprise: detecting whether an NFC card or reader exists around the NFC device; when the NFC card is detected, setting a resonance frequency of the resonance unit as a first optimal frequency based on a magnitude of a voltage generated from the resonance unit while a carrier wave is radiated to the NFC card through the resonance unit; and/or when the NFC reader is detected, setting the resonance frequency of the resonance unit as a second optimal frequency based on the magnitude of the voltage generated from the resonance unit in response to the wave received from the NFC reader and/or a magnitude of an inner current generated from the NFC chip in response to the wave.

Abstract: An apparatus and method is disclosed to negotiate communications parameters between near field communications (NFC) capable devices. In some embodiments, the NFC capable devices operate in a negotiation phase to negotiate one or more communications parameters prior to transferring information. In other embodiments, the NFC capable devices simultaneously negotiate the one or more communications parameters with the transferring of the information.

Abstract: A device according to one embodiment includes a variable-capacitor-tuned isolation tuning circuit having a directional coupler having an input port, an output port, an isolation port, and a coupling port. The variable-capacitor-tuned isolation tuning circuit also has and a tunable capacitor coupled in shunt to the coupling port of the directional coupler.

Abstract: A mobile electronic device comprises an RFID antenna section that sends and receives signals on a first useful frequency band, a main antenna section that sends and receives signals on a second useful frequency band, which is a higher frequency band than the first useful frequency band, an adjustment section that adjusts a resonance frequency of the RFID antenna section, and a control section that identifies a reactance value of the RFID antenna section based on the receiving sensitivity with respect to signals on the first useful frequency band and adjusts the resonance frequency of the RFID antenna section based on the identified reactance value by an adjustment section such that a high-order resonance frequency of the RFID antenna section is spaced apart from the second useful frequency band.

Abstract: Embodiments of provide an integrated circuit (IC) device. The IC device can include a substrate having first and second opposing surfaces, an IC die electrically coupled to the first surface of the substrate, a plurality of contact members coupled to the first surface of the substrate, and an interposer. The interposer can include a plurality of contact elements located on a first surface thereof, each conductive element being coupled to a respective one of the plurality of contact members, and an antenna formed using a conductive layer of the interposer, the antenna being electrically coupled to the IC die through at least one of the plurality of contact elements and at least one of the plurality of contact members.

Abstract: A radio-frequency (RF) processing device, for a wireless communication device, is disclosed. The RF processing device comprises an antenna, an RF-signal processing module, a controller, for generating a control signal according to a band switching signal, and a matching adjustment module for adjusting an impedance between the antenna and the RF-signal processing module according to the control signal.

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: A system that incorporates teachings of the subject disclosure may include, for example, determining a first voltage standing wave ratio (VSWR), selecting a VSWR circle from among a group of VSWR circles based on the first VSWR, identifying a group of sets of tuning settings for variable reactance elements of a matching network of the communication device where the identifying of the group of sets of tuning settings is based on each set of tuning settings of the group of sets of tuning settings being associated with the VSWR circle, and selecting a set of tuning settings from among the group of sets of tuning settings responsive to a second VSWR determined for the set of tuning settings satisfying a VSWR threshold. Other embodiments are disclosed.

Abstract: Radio frequency (RF) front end circuitry includes one or more antenna ports, one or more RF switching ports, and an RF switch matrix coupled between the antenna ports and the RF front end ports. The RF switch matrix comprises a dual 4×4 multiplexer, and is adapted to selectively couple any one of the antennas to any one of the plurality of RF switching ports.

Abstract: A wireless communication device uses operational parameters stored in a capabilities list to control operation of the device. The device may also provide auxiliary services, such as reception of broadcast television signals and location detection using network assisted GPS. When auxiliary services are selected, the cellular operation may cause interference with the auxiliary services. The wireless communication device includes a reduced set of capabilities to control operation of the wireless communication device when an auxiliary service is requested. The particular set of reduced capabilities may depend on the specific type of auxiliary service that has been requested. Upon termination of the auxiliary services, the full capabilities list may be restored and the operation of the wireless communication device is thereafter controlled by the full set of operational capabilities.

Abstract: A communication device is capable of extending a power supply unit to a second casing without additional components. A mobile telephone includes a circuit board disposed at an operation unit-side casing, a circuit board disposed at a display unit-side casing, a circuit part formed on the circuit board having a ground pattern and a contact point, a reference potential pattern layer disposed at the operation unit-side casing and electrically connected to the ground pattern, a reference potential pattern layer disposed at the display unit-side casing, and an FPC unit. The FPC unit includes a signal line and a shield layer. The shield layer is electrically connected to the contact point in the operation unit-side casing and is thus electrically connected to the reference potential pattern layer in the display unit-side casing.

Abstract: Electronic devices may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antenna structures. The antenna structures may form an antenna having first and second feeds at different locations. The transceiver circuit may have a first circuit that handles communications using the first feed and may have a second circuit that handles communications using the second feed. A first filter may be interposed between the first feed and the first circuit and a second filter may be interposed between the second feed and the second circuit. The first and second filters and the antenna may be configured so that the first circuit can use the first feed without being adversely affected by the presence of the second feed and so that the second circuit can use the second feed without being adversely affected by the presence of the first feed.

Abstract: A system can obtain an operational metric associated with the transceiver, determine a target figure of merit based on a compromise between a desired transmitter performance and a desired receiver, determine a current figure of merit based on the operational metric, and adjust the variable reactance component of the impedance matching circuit based on a comparison of the current figure of merit with the target figure of merit. Other embodiments are disclosed.

Abstract: A demodulator includes a sampler configured to sample a plurality of first amplitude values of a modulated carrier signal using a constant sampling frequency and a plurality of second amplitude values of the modulated carrier signal at different times using the same constant sampling frequency. The constant sampling frequency is equal to a carrier frequency of the modulated carrier signal with a tolerance of +/?1% of the carrier frequency.

Abstract: An electronic device such as a portable electronic device has wireless communications circuitry. Antennas in the electronic device may be used in transmitting radio-frequency antenna signals. A coupler and antenna signal phase and magnitude measurement circuitry may be used to determine when external objects are in the vicinity of the antenna by making antenna impedance measurements. In-band and out-of-band phase and magnitude signal measurements may be made in determining whether external objects are present. Additional sensors such as motion sensors, light and heat sensors, acoustic and electrical sensors may produce data that can be combined with the proximity data gathered using the antenna-based proximity sensor. In response to detecting that an external object such as a user's body is within a given distance of the antenna, the electronic device may reduce transmit powers, switch antennas, steer a phased antenna array, switch communications protocols, or take other actions.

Abstract: A method is provided for reducing near-field radiation and specific absorption rate (SAR) values in a communications device. The communications device includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure.

Abstract: A system on a chip (SoC) includes a transceiver comprising a transmitter and a receiver, wherein at least one of the transmitter and receiver has a configurable portion that can be configured to operate in a single ended mode and in a differential mode. Two interface pins are provided for coupling the transceiver to an antenna via a matching network, wherein the two interface pins are shareably coupled to the transmitter and to the receiver. A tunable capacitor is coupled to differential signal lines of the configurable portion, wherein the tunable capacitor is configured to be tuned to optimize impedance matching of the configurable portion for each mode of operation.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a computer-readable storage medium having computer instructions to perform actual measurements of one or more performance parameters of a communication device according to a subset of tuning states of a tunable matching network operable in a communication device, determine estimated measurements of the one or more performance parameters of the communication device for a portion of the tuning states not included in the subset of tuning states according to the actual measurements, identify a data set for each of the one or more performance parameters from at least portions of the tuning states and the actual and estimated measurements, and determine from at least a portion of the date sets one or more tuning states that achieve at least one desirable performance characteristic of the communication device. Additional embodiments are disclosed.

Abstract: A passively re-radiating cell phone sleeve assembly capable of receiving a nested cell phone provides signal boosting capabilities and provides a radar enablement. Signal boosting is enabled by use of an additional antenna, a pass-through repeater, dual antenna isolation capability and other features.