Abstract: A UE may determine use of a sensor or an interface of the UE, and in response, may adjust at least one of a beam selection, a transmission power, an operation mode, or a performance of carrier aggregation for the UE. A base station may receive an indication from the UE that a carrier for which the UE is configured has an effect on performance of a sensor or an interface of the UE. The base station may adjust a configuration of the carrier or adjusting uplink grants for the carrier in response to receiving the indication from the UE.

Abstract: Provided is a signal processing circuit including an information detection unit (204) that detects signal bandwidth information indicating a bandwidth of a channel signal in a broadcast signal received by a receiving circuit (100) that receives the broadcast signal, and the signal bandwidth information is used for execution of a channel scan.

Abstract: Wireless receiver systems and methods for user equipment are described that employ multiple receiver heads. The multiple heads can receive wireless communication signals over different receive paths from different transmission sources. The systems can scan and monitor signal quality from all receiver heads during a scheduled gap in a communication link without interfering with an ongoing communication session.

Abstract: A calling device of a MRI system may include a reader/writer and a call maker. The reader/writer can send a fixed-frequency electromagnetic wave. The call maker may include a main body, an antenna, an operating member, and an answering controller. The antenna can generate an induced current after receiving the fixed-frequency electromagnetic wave. The operating member can switch between first and second positions relative to the main body. The answering controller is configured such that: when the operating member is in the first position, a first radio-frequency signal is sent through the antenna with energy obtained from the induced current generated by the antenna, and when the operating member is in the second position, a second radio-frequency signal is sent through the antenna with energy obtained from the induced current generated by the antenna. The reader/writer can send different prompt signals according to the first and second radio-frequency signals.

Abstract: In simultaneous communication using multiple frequency bands, the degradation in the communication quality is suppressed. The radio-frequency front-end circuit (1) includes an antenna terminal (2), a transmit filter (3), a receive filter, a transport filter, a switch (6), and a phase adjusting circuit (7). The switch (6) is capable of connecting the antenna terminal (2) to the transmit filter (3) or the receive filter and the transport filter simultaneously. The transmit filter (3) is disposed on a transmission path (T1). The receive filter is disposed on a reception path. The transport filter is disposed on a transport path. The phase adjusting circuit (7) is disposed on at least one of paths, the transmission path (T1), the reception path, and a reception/transmission path.

Abstract: A radio frequency (RF) system and an electronic device are provided. The RF system includes an RF transceiver, an RF processing circuit coupled with the RF transceiver, a transfer switch module, a first antenna, a second antenna, a third antenna, and a fourth antenna. The RF processing circuit comprises a first transmit (TX) module, a second TX module, a first receive (RX) module, a second RX module, a first duplexer, a second duplexer, and a filtering module. The first antenna is used for transmission in a first low-band (LB) and primary reception in the first LB, the second antenna is used for transmission in a second LB and primary reception in the second LB, the third antenna is used for diversity reception in the second LB, the fourth antenna is used for diversity reception in the first LB.

Abstract: An adaptive modulation, coding and spreading (AMCS) transmitter is configured to map modulation symbols to a plurality of OFDM subcarriers to generate symbol-modulated subcarriers. For AMCS, some of the modulation symbols may be mapped to individual subcarriers (e.g., similar to conventional OFDM) and one or more of the modulation symbols may be mapped to (i.e., spread across) more than one of the subcarriers (i.e., unlike conventional OFDM) based on a spreading ratio. An IFFT may be performed on the symbol-modulated subcarriers prior to transmission. AMCS allows for adaptation to lower capacity and/or frequency-selective channels by optionally spreading existing modulations over multiple carriers and/or time slots. AMCS expands the catalog for possible modulations/codings by splitting a symbol across multiple carriers and/or time slots. AMCS is particularly useful when channel conditions are highly frequency-dependent or uniformly low capacity.

Abstract: Radio frequency (RF) generators are disclosed. A RF generator may include an analog signal generator configured to generate a pulsed analog signal responsive to a digital pulsed waveform defined by one or more commands. The RF generator may also include a modulator configured to generate a pulsed radio frequency (RF) signal by modulating an RF carrier using the pulsed analog signal as a modulating signal. Further, the RF generator may include an amplification stage configured to amplify the pulsed RF signal output by the modulator. RF generation systems and methods of generating a pulsed RF signal also disclosed.

Abstract: A method, network node and wireless device configured for allocating resources for reverse link transmissions from a second network node to a first network node and forward link transmissions from the first network node to the second network node in a wireless communication system are disclosed. According to one aspect, the method includes selecting a per-band duplexing cadence for each of at least two frequency bands, a duplexing cadence defining a forward link/reverse link pattern of adjacent successive time slots. The method also includes allocating each of the at least two frequency bands to one of forward link and reverse link transmission in each of adjacent successive time slots according to the per-band duplexing cadence for the frequency band.

Abstract: A system and method of optimizing a selection of an antenna on an information handling system comprising executing a sensor module to receive data from a plurality of sensors for tracking orientations, configurations, and locations of the information handling system and an antenna performance tracking system for measuring antenna performance parameters at a plurality of locations and training an antenna selection machine learning algorithm of an antenna selection machine learning module with training inputs of the orientations, configurations, and antenna performance parameters for a plurality of locations to determine an antenna system recommendation from a plurality of available antenna systems deployed on the information handling system. Executing the trained antenna selection machine learning module with operating inputs for an orientation and configuration at an operation location to determine a recommended antenna system from the plurality of available antenna systems for use in wireless communication.

Abstract: Method and systems are provided for receiving and transmitting signals over a time division duplex communication path (the “Path”). Operations may include sending a first signal via an uplink portion of the Path, and receiving a second signal via a downlink portion of the Path. The Path operates over a first band having a first frequency range and during a communication time including an uplink period (TU) and a downlink period (TD). The uplink portion is sent during the uplink period, uses a first portion of the first frequency range and is disposed between a first uplink guard band portion and a second uplink guard band portion. The guard bands are allocated from a second portion and a third portion of the first band. The first band is disposed between a second band, providing a second communication path, and a third band providing an FDD communication path.

Abstract: An Analog-to-Digital Converter, ADC, system is provided. The ADC system comprises a plurality of ADC circuits and a first input for receiving a transmit signal of a transceiver. One ADC circuit of the plurality of ADC circuits is coupled to the first input and configured to provide first digital data based on the transmit signal. The ADC system further comprises a second input for receiving a receive signal of the transceiver. The other ADC circuits of the plurality of ADC circuits are coupled to the second input, wherein the other ADC circuits of the plurality of ADC circuits are time-interleaved and configured to provide second digital data based on the receive signal. Additionally, the ADC system comprises a first output configured to output digital feedback data based on the first digital data, and a second output configured to output digital receive data based on the second digital data.

Abstract: Aspects of the subject disclosure may include, for example, identifying a local mobile country code (MCC) for a wireless communication device, accessing a home MCC list for the wireless communication device, and determining whether the local MCC for the wireless communication device matches any home MCC comprised in the home MCC list for the wireless communication device. In various embodiments, an operating parameter of the wireless communication device may be modified responsive to a determination that the local MCC for the wireless communication device does not match any home MCC comprised in the home MCC list for the wireless communication device. Other embodiments are disclosed.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine to operate in an antenna switch diversity mode to transmit an uplink signal according to an antenna switching pattern, the antenna switching pattern comprising switching between a first transmit chain coupled to a first antenna and a second transmit chain coupled to a second antenna. The UE may transmit at least a first portion of the uplink signal using the first transmit chain coupled to the first antenna, the first transmit chain coupled to the first antenna. The UE may transmit at least a second portion of the uplink signal using the second transmit chain coupled to the second antenna, the second transmit chain coupled to the second antenna.

Abstract: An electronic device and an antenna device of an electronic device are provided. The electronic device includes a wafer, a radio frequency integrated circuit (RFIC) fabricated in the wafer, an antenna interposer disposed on a surface of the wafer, an antenna structure fabricated in the antenna interposer, the antenna structure comprising a first conductive pattern with a first electrical length and a second conductive pattern with a second electrical length, a switch formed in the RFIC and electrically connected to at least one of the first conductive pattern or the second conductive pattern based on a frequency band of a signal being transmitted or received by the RFIC, and a through hole formed in at least part of the wafer or the antenna interposer and electrically connecting the RFIC and the antenna structure.

Abstract: An information handling system includes a processor, a memory, and a wireless interface adapter for transceiving wireless communications via radiofrequency (RF) waves, a plurality of antennas operatively coupled to the wireless interface adapter, including a first antenna operatively coupled to a first wireless protocol subsystem, a second antenna operatively coupled to a second wireless protocol subsystem, and a shared antenna, an RF switch configured to operatively switch the shared antenna between the first wireless protocol subsystem and the second wireless protocol subsystem, and an antenna controller operatively coupled to the RF switch to receive status information of the status of the first wireless protocol subsystem to determine assignment of the shared antenna, and to switch the RF switch to operatively couple the shared antenna to the first wireless protocol subsystem when it is determined to be active.

Abstract: A wireless communication device (UE) may conduct wireless communications using one or more antennas according to multiple radio access technologies (RAT) associated with corresponding operating frequency bands. The UE may perform adaptive antenna tuning, for example, application-based antenna tuning for increasing the operating efficiency of the UE, which may improve user experience. The UE may periodically identify one or more applications running on the UE, the respective RATs that support the (running) applications, and which of the corresponding frequency bands are used by the (running) applications. The UE may determine the tuner device settings for tuning the one or more antenna(s) based on the (running) applications or the type and/or priority of the (running) applications, which RATs support the running applications, which of the corresponding frequency bands are used by the (running) applications, and operating conditions associated with the frequency bands used by the (running) applications.

Abstract: A vehicle having the same, and a method for controlling the vehicle is provided. The vehicle includes a communicator configured to communicate with other vehicle, a controller configured to allow the communicator to communicate with the frequency of the first band, identify a usage rate of the frequency of the second band, allow the communicator to communicate with the frequency of the second band, and allow the communicator to communicate by using the frequency of the first band, and a storage configured to store information on the frequency of the first band and the frequency of the second band.

Abstract: The present application discloses a radio frequency system, includes a detection device, at least one antenna line device, and an antenna that are sequentially connected in series by using a radio frequency channel. Each of the at least one antenna line device is configured to: receive a detection signal from the detection device or a previous antenna line device connected in series to the antenna line device; and add device information of the antenna line device to the received detection signal, and send, to the antenna or a next antenna line device connected in series to the antenna line device, the detection signal to which the device information is added. The detection device obtain device information of each of devices connected in series on a radio frequency line, to determine whether a connection relationship between the devices is correct, and determine a specific port location at which an error occurs.

Abstract: A wireless device with an antenna plate includes one or more components; and at least one antenna integrally formed with the antenna plate. The at least one antenna has a low frequency section and a high frequency section, wherein the high frequency section has a slot, the dimensions of the slot being formed in part by a parasitic arm formed within the high frequency section. A method for manufacturing a wireless device having an antenna plate includes stamping a metallic sheet to form the antenna plate having at least one antenna element; and folding the at least one dual-band antenna element about a portion of a perimeter of the stamped sheet forming an upper surface, a side wall and a lower surface of the at least one antenna element.

Abstract: Radio frequency (RF) switches with controllable resonant frequency are provided herein. In certain embodiments, an RF switch includes a stack of two or more field-effect transistors (FETs) electrically connected between a first terminal and a second terminal. Additionally, the RF switch further includes an inductor connected between the first terminal and the second terminal and in parallel with the stack of FETs. A first portion of the FETs are controlled to turn on or off the RF switch. Additionally, a second portion of the FETs are controlled to provide tuning to a resonant frequency of the RF switch when the RF switch is turned off.

Abstract: Provided are an active antenna system, a mobile terminal, and a configuration method of an antenna system. The active antenna system includes an active amplification module and an external antenna. The active amplification module is detachably electrically coupled to an electronic device, wherein the active power amplification module includes an active antenna circuit for amplifying and filtering a signal transmitted and received by the external antenna, and the external antenna is detachably electrically coupled to the active power amplification module. The problem of increase of power consumption of the terminal caused by enlarging a signal radiation range of the terminal is solved, thereby realizing decrease of the power consumption of the terminal while enlarging the signal radiation range of the terminal.

Abstract: A system for wireless power reception, preferably including one or more: antennas, dynamic impedance matches, RF-DC converters, DC impedance converters, and/or DC power outputs. A method for wireless power reception, preferably including: receiving power wirelessly at an antenna, dynamically adjusting an input impedance of a dynamic impedance match coupled to the antenna, and/or delivering the power to a load.

Abstract: An antenna monitoring module electrically coupled to an antenna, the antenna monitoring module including an embedded element in the antenna, test antenna configured to send and receive radio frequency (RF) test signals to and from the antenna, an input blocking module disposed at an input of the antenna monitoring module to facilitate receipt of a master test signal by the antenna monitoring module, an addressable mixed signal processor that determines an integrity of a connection to the antenna and a performance of the antenna based on measurements associated with the RF test signals and the master test signal.

Abstract: A device includes: a first wireless communication interface; a second wireless communication interface; a storage; and a controller. The controller is configured to perform: storing in the storage a center communication frequency of a second communication channel used for second wireless communications; determining a search target distribution, the search target distribution being a range defined by minimum and maximum communication frequencies among a plurality of communication frequencies, the plurality of communication frequencies being at least a part of a plurality of center communication frequencies stored in the storage and being separated from each other by less than a first frequency bandwidth occupied by each of a plurality of first channels; and determining a first communication channel from among at least one first channel satisfying a condition requiring that both minimum and frequencies of each of the at least one first channel be included in the search target distribution.

Abstract: A system and method of adaptively tuning an antenna of a wireless device including detecting a reflected electrical signal from the antenna during transmission of a wireless signal, converting the reflected electrical signal into at least one parameter indicative of its strength, and adjusting, based on the at least one parameter, a tune value to adjust a matching network during the transmission of the wireless signal to reduce the strength of the reflected electrical signal. The reflected electrical signal may be converted to a corresponding power value, and the tune value may be repeatedly adjusted by an incremental amount or according to a binary search method or the like to reduce the power level of the reflected electrical signal. The reflected electrical signal may be demodulated into demodulated information used to determine an optimal transfer function of the matching network and the tune value may be adjusted accordingly.

Abstract: A radio frequency front end system can include a first module configured to provide multi-input multi-output (MIMO) receive operations for a first plurality of mid bands and a first plurality of high bands. The first module can be further configured to provide transmit operations for the plurality of mid bands. The first module can include a first node. The radio frequency front end system can include a second module configured to provide transmit and receive operations for a second plurality of mid bands and a second plurality of high bands. The second module can be a power amplifier integrated duplexer (PAiD) module. The second module can include a second node. The first module and the second module can be coupled by a signal path at the first node and the second node, respectively.

Abstract: An electronic device is provided. The electronic device includes a first antenna for a first band and a second band, a second antenna for the second band and a third band and a pre-processing unit configured to generate, based on identifying a frequency band of a first signal received via the first antenna and a frequency band of a second signal received via the second antenna are the second band, a pre-processed signal by combining the first signal and the second signal based on a ratio of a weight factor, and to transmit the pre-processed signal to a first radio frequency (RF) receiver.

Abstract: An antenna's resonance frequency is detuned when a part of a human body approaches or contacts the antenna and consequently results in efficiency loss. The antenna may be tuned by changing its total load capacitance such that the antenna's total load capacitance falls within a reference capacitance range of a reference capacitance, where the antenna can operate at or near its pre-determined operating resonance frequency. A tunable capacitor may be coupled to the antenna for tuning the total load capacitance of the antenna.

Abstract: Disclosed is an electronic device. The electronic device according to an embodiment includes a plurality of antennas, and a communication circuit electrically connected with the plurality of antennas. The communication circuit includes a plurality of circuits receiving a signal in a first band and is configured to simultaneously receive the signal in the first band through two or more circuits of the plurality of circuits from two or more antennas, which are positioned adjacent to each other, from among the plurality of antennas. The number of the plurality of antennas is the same as the number of plurality of circuits. Besides, various embodiments understood through this disclosure are possible.

Abstract: A radio frequency (RF) device and its voltage generating circuit are provided. The RF device includes the voltage generating circuit and a RF circuit. The voltage generating circuit receives a RF signal and generates at least one bias voltage related to the RF signal. The RF circuit is used to receive the RF signal. The RF circuit is coupled to the voltage generating circuit to receive the bias voltage. The bias voltage is used to operate the conduction state of at least one RF transmission path of the RF circuit.

Abstract: Disclosed herein are techniques to enable discovery of a NAN cluster using low-power communication. According to such techniques, a NAN discovery beacon including information indicative of a schedule for communication using a first radio is transmitted using a second radio that utilizes a lower amount of power relative to the first radio.

Abstract: An antenna system and a mobile terminal, the antenna system includes a metal shell, a system ground, a mainboard and an antenna unit, the system ground is connected with the metal shell; the mainboard is provided with a mainboard ground connected with the system ground, a main circuit and a matching network, the matching network includes a first and second matching element; the main circuit includes a first radio frequency source, a first antenna terminal, a second antenna terminal and a second radio frequency source which are successively connected in series, and at least one matching network is provided between any adjacent two of them, the antenna unit is connected with the mainboard through the first and/or the second antenna terminal, so that the antenna unit is coupled with the top frame or the bottom frame to form a first antenna, a second antenna and a third antenna.

Abstract: Front-end architecture having split diplexers for carrier aggregation and MIMO support. In some embodiments, a multiplexing architecture can include an assembly of filters configured to support carrier aggregation with one or more antennas. The assembly of filters can include a first diplexer configured to support a mid-band and a first high-band. The assembly of filters can further include a second diplexer configured to support the mid-band and a second high-band. The multiplexing architecture can further include a switch assembly implemented between the assembly of filters and respective one or more nodes associated with the one or more antennas.

Abstract: A foreign object detection method and apparatus for performing same. A wireless power transmitter has a matching network and transmit coil. The method includes, stimulating the transmit coil with electrical signals at a plurality of frequencies, measuring a response of the transmit coil to the electrical signals, determining a quality factor and/or resonant frequency of the transmit coil based upon the measured response, and analyzing the quality factor and/or resonant frequency to determine whether a foreign object is coupled to an electromagnetic field generated by the transmit coil.

Abstract: A front-end module includes a substrate, and a receiving circuit that is provided in or on the substrate and in which CA is executed. The receiving circuit includes a first filter, a first inductor, and a first LNA disposed on a first path, and a second filter, a second inductor, and a second LNA disposed on a second path. A coil axis of the first inductor and a coil axis of the second inductor are different from each other.

Abstract: A radio frequency front-end circuit includes a multiplexer including filters with different pass bands and including a first acoustic wave filter and a first terminal of each of the filters being connected in common, a second acoustic wave filter including a pass band within the pass band of the first acoustic wave filter, and a switch including a common terminal connected to a second terminal of the first acoustic wave filter and selective terminals including a selective terminal connected to the second acoustic wave filter. Each of an acoustic wave resonator of the first acoustic wave filter located closest to the switch and an acoustic wave resonator of the second acoustic wave filter located closest to the switch, is a serial arm resonator.

Abstract: An electronic device may include wireless circuitry with antennas. An antenna resonating element arm for an antenna may be formed from conductive housing structures running along the edges of the device. The antenna may have first and second antenna feeds and multiple adjustable components that bridge a slot between the antenna resonating element and an antenna ground. Control circuitry may control the adjustable components and selectively activate one of the first and second feeds at a given time to place the antenna in first, second, or third operating modes. The control circuitry may determine which operating mode to use based on information indicative of the operating environment of the device. By switching between the operating modes, the control circuitry may shift current hot spots across the length of the resonating element arm to ensure satisfactory performance of the antenna in a variety of operating conditions.

Abstract: Methods and systems for a multi-band transceiver front-end architecture with reduced insertion loss may comprise, in a transceiver comprising a first plurality of switches (each with a common terminal coupled to a transmit signal path), a second plurality of switches (each with a common terminal coupled to a receive signal path), and a plurality of communications links: operatively coupling the transmit signal path to one of the communications links using one of the first switches when the transceiver is in a transmit mode, and operatively coupling the receive signal path to one of the communications links using one of the second switches when the transceiver is in a receive mode. An off capacitance of at least one of the switches may be reduced utilizing an operatively coupled inductive element. The inductive element may comprise an inductor operatively coupled in series with the transmit signal path.

Abstract: An antenna structure includes a metal housing, a switching circuit, and a first feed source. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a groove. A first portion of the front frame positioned at a first side of the groove forms a first branch. A second portion of the front frame extending from a second side of the groove to one end of the slot forms a second branch. The first feed source is electrically connected to the first branch and the second branch, and the first branch is grounded through the switching circuit.

Abstract: To enable radio communication to be performed more favorably in a UL band of FDD when the UL band is used for both DL and UL in a time division manner. There is provided a device that includes a switching unit that switches an operation mode of an uplink band of FDD between a first mode in which the uplink band is used for uplink and a second mode in which the uplink band is used for both downlink and uplink in a time division manner and a control unit that gives an instruction on a first timing advance on the basis of a downlink reception timing in a downlink band of FDD corresponding to the uplink band and an instruction on a second timing advance on the basis of a downlink reception timing in the uplink band.

Abstract: Various examples provide a method of making a hydrophobic surface for an object. According to the method, a hydrophobic coating may be applied to an original surface of the object. A microstructure may be formed on the original surface of the object. The hydrophobic surface of the object may be obtained with the microstructure submerged by the hydrophobic coating. The microstructure may be a rough structure including micro-sired portions, and may have greater hardness than the hydrophobic coating.

Abstract: An antenna structure includes a metal housing, a first feed source, a first ground portion, and a first switching circuit. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a first gap and a second gap. The metal housing is divided into at least a first portion by the slot, the first gap, and the second gap. The first feed source is electrically connected to the first portion for supplying current to the first portion. The first ground portion is electrically connected to the first portion for grounding the first portion. One end of the first switching circuit is electrically connected to the first portion. Another end of the first switching circuit is grounded.

Abstract: A method that incorporates teachings of the subject disclosure may include, for example, a method comprising receiving from a transceiver that is implemented as an integrated circuit (IC) chip, by a variable reactive element, a signal, wherein the signal is in a frequency band that comprises a first sub-frequency band and a second sub-frequency band, controlling, by a controller, the variable reactive element, such that the variable reactive element is placed into one of a group of states, wherein the group of states comprises a first state having a first reactance and a second state having a second reactance, and wherein the first reactance is different from the second reactance. Other embodiments are disclosed.

Abstract: An antenna structure which is switchable between low, middle, and high frequencies includes a metal housing, a feed portion, a resonance portion, and a connecting portion. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a first gap and a second gap. The slot, the first gap, and the second gap separate a continuous antenna portion from the metal housing. The feed portion is electrically connected to the antenna portion for feeding current to the antenna portion. One end of the resonance portion is electrically connected to a first location of the antenna portion and another end grounded. One end of the connecting portion is electrically connected to a second location of the antenna portion and another end is electrically connected to the resonance portion.

Abstract: A method for tuning a radio transponder having an antenna, a transceiver unit and a resonant circuit connected to the antenna, wherein the resonant circuit includes a plurality of capacitors arranged in parallel, where each capacitor is arranged in series with a fuse, where a capacitor is switchable via a fuse arranged in series to tune the resonant circuit, and where a control unit associated with the resonant circuit is configured to produce a switching signal for a respective fuse of the resonant circuit based on a control signal transmitted by a radio transponder reader.

Abstract: A user equipment is operative to receive prioritization information for a plurality of unlicensed carriers from a cellular network node and to use the prioritization information for channel measurements or carrier selection.

Abstract: A ultra-compact coupler designed to sample the actual output power of a power amplifier and which is “VSWR insensitive”, such that reflected power is essentially not coupled to a detector circuit and only forward power is detected and processed. In a first embodiment, a coupler is situated between the final amplifier stage of a power amplifier and an output impedance matching network, and is specially configured for operation in a low impedance environment in conjunction with a detector circuit, thereby substantially reducing the areal size of the coupler. In a second embodiment, a coupler is integrated within an output impedance matching network coupled to the final amplifier stage of a power amplifier so as to share an inductor between the coupler and the output impedance matching network, thereby further substantially reducing the areal size of the coupler.

Abstract: A calibration architecture that enables accurate calibration of radio frequency (RF) integrated circuits (ICs) chips used in transceiver RF systems in a relatively simple testing environment. Embodiments of the invention include one or more on-chip switchable internal calibration paths that enable direct coupling of a portion of the on-chip circuit to an RF test system while isolating other circuitry on the chip. Some embodiments allow interconnection of switchable internal calibration paths between separate IC chips. Still other embodiments utilize internal switches and antenna mutual coupling to provide over-the-air calibration, alone or in combination with direct signal coupling via internal calibration paths. Periodic self-calibration of an RF IC can be performed after initial factory calibration, so that adjustments in desired performance parameters can be made while such an IC is embedded within a final system, and/or to take into account component degradation due to age or other factors.

Abstract: A calibration architecture that enables accurate calibration of radio frequency (RF) integrated circuits (ICs) chips used in transceiver RF systems in a relatively simple testing environment. Embodiments of the invention include one or more on-chip switchable internal calibration paths that enable direct coupling of a portion of the on-chip circuit to an RF test system while isolating other circuitry on the chip. Periodic self-calibration of an RF IC can be performed after initial factory calibration, so that adjustments in desired performance parameters can be made while such an IC is embedded within a final system, and/or to take into account component degradation due to age or other factors.