Abstract: A radio frequency circuit can transfer radio frequency signals used in first and second communication systems, and includes: a first transfer circuit that transfers a radio frequency signal having a frequency range in a first communication band having first transmission and receiving bands; and a second transfer circuit that transfers a radio frequency signal having a frequency range in a second communication band having second transmission and receiving bands. The radio frequency circuit can simultaneously transmit transmission signals having frequency ranges in the first and second communication bands using the first and second transfer circuits. The first receiving band is lower than the first transmission band, the first transmission band is lower than the second transmission band, and the second transmission band is lower than the second receiving band. The first and second transfer circuits are mounted on different mounting boards.

Abstract: Radio frequency communication systems with a combined antenna impedance tuning and antenna multiplexing functionality are provided. In certain embodiments, a packaged radio frequency module includes an antenna multiplexer and an antenna impedance tuner. The module can be configured to provide impedance matching between one or more radio frequency front end modules and an antenna. The antenna impedance tuner can supplement antenna tuning provided by an antenna aperture separately connected to the antenna.

Abstract: This disclosure relates to variable-gain amplifiers that include degeneration circuits configured to adapt to a gain mode that is currently being implemented. For example, a variable-gain amplifier can operate in a plurality of gain modes to amplify a signal with different levels of amplification. The variable-gain amplifier can include a gain circuit configured to amplify a signal and a degeneration circuit coupled to the gain circuit. The degeneration circuit can include an inductor and a switching-capacitive arm coupled in parallel to the inductor. The degeneration circuit can operate based on a current gain mode to change an inductance for the variable-gain amplifier.

Abstract: A wireless communication module includes a wireless module board, a frequency converter, an amplifier phase shifter, a band-pass filter, and a communication board, and a through-hole, which penetrates in a direction in which the wireless module board and the communication board are aligned, is formed at a portion of the communication board to which at least one of IC chips of the frequency converter and the amplifier phase shifter faces, and the band-pass filter is covered by the communication board.

Abstract: MIMO antenna modules and antenna units for a wireless communication system are provided. In one embodiment, a remote unit comprises: a controller module, comprising: a first substrate having a first ground plane, control circuitry and interface circuitry on the first substrate, a first connection region formed in the first substrate; and at least one antenna module coupled to the controller module, the antenna module comprising: a second substrate having a second ground plane, antennas on the second substrate, a second connection region on the second substrate and coupled to the interface circuitry via the first connection region, wherein the second connection region communicates data between the interface circuitry and the antennas, and a set of ground-plane contacts on the second substrate that electrically couple the first ground plane to the second ground plane of the second substrate when the second connector region is engaged with the first connector region.

Abstract: A test system includes: a signal processor configured to generate a plurality of orthogonal baseband sequences; a signal generator configured to supply the plurality of orthogonal baseband sequences to a corresponding plurality of RF transmitters of a device under test (DUT), wherein the RF transmitters each employ the corresponding orthogonal baseband sequence to generate a corresponding RF signal on a corresponding channel among a plurality of channels of the DUT such that the RF transmitters output a plurality of orthogonal RF signals at a same time; a combiner network configured to combine the plurality of orthogonal RF signals and to output a single signal under test; and a single channel measurement instrument configured to receive the single signal under test and to measure independently therefrom at least one characteristic of each of the RF transmitters. Orthogonal RF test signals may be used similarly to test RF receivers of the DUT.

Abstract: A wireless battery pack is provided which may be magnetically connected to a device to be charged having the capability for wireless charging. The battery pack includes an emitter coil and battery to provide wireless charging to a battery powered electronic device which is capable of wireless charging, including but not limited to cellular telephones.

Abstract: Disclosed is receiver for a noise limited system. A front-end circuit amplifies and band-limits an incoming signal. The amplification increases the signal swing but introduces both thermal and flicker noise. A low-pass band limitation reduces the thermal noise component present at frequencies above what is necessary for correctly receiving the transmitted symbols. This band limited signal is provided to the integrator circuit. The output of the integrator is equalized to reduce the effects of inter-symbol interference and then sampled. The samples are used to apply low frequency equalization (i.e., in response to long and/or unbalanced strings of symbols) to mitigate the effects of DC wander caused by mismatches between the number of symbols of each kind being received.

Abstract: A radio-frequency integrated chip (RFIC) is described which provides a number of low noise amplifiers (LNAs) and load circuits. The low noise amplifiers are organized in groups. In some embodiments, a load circuit may be dedicated to a group or shared between groups. The RFIC includes an LNA group including a plurality of LNAs configured to amplify carrier signals related to a plurality of frequency bands, a second LNA group configured to amplify a plurality of second carrier signals, a first load circuit group dedicated to the first LNA group, a second load circuit group dedicated to the second LNA group, and a third load circuit group shared between the first LNA group and the second LNA group. In some embodiments the third load circuit group adaptively performs frequency down-conversion on a carrier signal amplified by at least one of the first LNA group and the second LNA group.

Abstract: An antenna arrangement for a user equipment is disclosed. The antenna arrangement comprises a first antenna element configured to operate at frequencies above a limit frequency, a second antenna element configured to operate at frequencies below the limit frequency, and a wave trap configured to resonate within a frequency band above the limit frequency. The wave trap is connected to the second antenna element.

Abstract: An electronic device can comprise: a processor; a transceiver connected to the processor; a first front-end unit connected to the transceiver and performing transmission/reception at an LTE low-band frequency; a second front-end unit connected to the transceiver and performing transmission/reception at an LTE middle-band frequency and/or an LTE high-band frequency; a third front-end unit connected to the transceiver and performing transmission/reception at a 5G-band frequency; a diplexer unit connected to the first front-end unit and the second front-end unit; a filter unit connected to the third front-end unit; a first antenna connected to the diplexer unit; a second antenna connected to the filter unit; and a third antenna connected to the third front-end unit.

Abstract: An apparatus configured to perform communication includes a communication unit configured to transmit advertising information, and an obtaining unit configured to obtain information about a usage type of the apparatus. The communication unit is configured to transmit advertising information including the obtained information about the usage type.

Abstract: An electronic device including an antenna is provided. The electronic device includes a housing including a first housing structure having a first side member, a second housing structure having a second side member, and a hinge structure connecting the first housing structure and the second housing structure to each other, and a transceiver electrically connected with the first side member and the second side member.

Abstract: According to one or more embodiments, an electronic device comprises an antenna, a transceiver configured to generate a first signal which corresponds to a first frequency band and transmit the first signal to the antenna, a coupler electrically connected to the antenna and the transceiver, and a communication processor operatively connected to the transceiver, and the communication processor may be configured to identify whether the first signal is abnormal, at least partially based on at least part of the first signal, wherein the at least part of the first signal is a signal fed back through the coupler, and, based on identifying that the first signal is abnormal, control transmission power of the first signal during a set time interval. Other embodiments may be possible.

Abstract: A novel RF switch circuit and method for switching RF signals is described. The RF switch circuit is fabricated in a silicon-on-insulator (SOI) technology. The RF switch includes pairs of switching and shunting transistor groupings used to alternatively couple RF input signals to a common RF node. The switching and shunting transistor grouping pairs are controlled by a switching control voltage (SW) and its inverse (SW_). The switching and shunting transistor groupings comprise one or more MOSFET transistors connected together in a “stacked” or serial configuration. The stacking of transistor grouping devices, and associated gate resistors, increase the breakdown voltage across the series connected switch transistors and operate to improve RF switch compression. A fully integrated RF switch is described including digital control logic and a negative voltage generator integrated together with the RF switch elements.

Abstract: A method for configuring a multi-mode antenna system is provided. The method includes obtaining channel selection data indicating the antenna system is tuned to a first channel of a plurality of channels. The method includes configuring the antenna system in at least one operating mode of a plurality of operating modes, with each operating mode of the plurality of operating modes having a distinct radiation pattern. The method includes obtaining data indicative of a channel quality indicator for the at least one operating mode. The method includes determining a selected operating mode for the multi-mode antenna system for the first channel of the plurality of channels based, at least in part, on the data indicative of the channel quality indicator. The method includes configuring the antenna system in the selected operating mode when the multi-mode antenna system is tuned to the first channel.

Abstract: An article of headgear to be worn on the head of a user includes a first portion to encompass at least a portion of the head of the user and a visor extending forward from the first portion. The visor includes a laterally extending opening therein to receive a personal communication device including a camera such that a lens of the camera is positioned below the lower surface of the visor.

Abstract: A novel and useful discrete time IIR bandpass filter is disclosed that takes advantage of clock phase reuse thereby leading to significant improvements in filtering, especially stop band rejection in comparison to prior art filters. The bandpass filter of the present invention achieves improved filtering performance without adding any additional clock phases to the circuit. In particular, reuse of the already existing clock phases increases the order and performance of the filter. The invention exploits reuse of the clock phases to provide higher order filtering along with a discrete time IIR filter design which is capable of operating at high frequency. Consequently, much better filtering is achieved and the quality factor of the filter is improved leading to sharper transition bands especially for close-in band blockers in modern 4G/5G receivers.

Abstract: An antenna apparatus includes: an antenna substrate including a heat source provided to at least one face of the antenna substrate; and a heat dissipator configured to dissipate heat produced in the heat source. The heat dissipator contacts with at least a portion of the heat source. An area of a cross section parallel to the antenna substrate of the heat dissipator at a distance less than a predetermined distance in a normal direction of the contact face from the contact face is equal to or less than an area of the contact face, and an area of a cross section parallel to the antenna substrate of the heat dissipator at a distance equal to or more than the predetermined distance from the contact face is larger than the area of the contact face.

Abstract: Certain embodiments of the disclosure relate to a device and a method for increasing the efficiency of an antenna of an electronic device that includes a rollable display. The electronic device may include: a processor; a first housing, in which the processor is disposed, including a first conductive portion; a second housing configured to slide in a first direction from the first housing and including a second conductive portion; a rollable display, at least a portion of which is exposed in a slide-out manner according to movement of the second housing; and a variable element disposed in the second housing and is electrically connected to the second conductive portion. The processor may adjust an electrical characteristic of the variable element in response to sliding of the second housing. The disclosure may further include various other embodiments.