Abstract: A signal switch includes a first node and a second node. A first transistor is coupled between the first and second nodes, and a plurality of second transistors is coupled in series between the first and second nodes, in parallel with the first transistor. A shunt transistor and inductor, coupled in series, are firstly connected between two of the plurality of second transistors and are secondly connected to a reference node.

Abstract: Radio-frequency switch having intermediate shunt. In some embodiments, a switch assembly can include a first stack and a second stack arranged in series between a first node and a second node, and defining an intermediate node between the first stack and the second stack. Each of the first stack and the second stack can include a respective number of transistors arranged in series. The switch assembly can further include a switchable shunt path having a first end coupled to the intermediate node such that the switchable shunt path is capable of connecting the intermediate node to a second end such as a ground. In some embodiments, the first and second stacks can be configured to be the same or be different.

Abstract: An electromagnetic coupler includes a dielectric layer with a first transmission line connecting an input port to an output port. A second transmission line on another surface of the dielectric layer forms a coupled port and an isolation port. The electromagnetic coupler provides a coupled signal at the coupled port, which is representative of an input signal at the input port. The amplitude of the coupled signal is related to the amplitude of the input signal by a coupling factor. A tuning element on the dielectric layer is configured to stabilize the coupling factor over a range of variations in thickness of the dielectric layer.

Abstract: Systems, methods, and devices for communicating with a serial/parallel interface are described herein. In an aspect, a wireless device includes a transceiver configured to output a plurality of transmission paths, and an antenna configured to output a signal corresponding to at least one of the transmission paths. The wireless device further includes a wireless switching component including a radio-frequency switch configured to selectively connect the antenna to one of the transmission paths, a plurality of signal pins, a serial interface including a plurality of serial inputs electrically coupled to at least one pin of the plurality of signal pins, a parallel interface including a plurality of parallel inputs electrically coupled to at least one pin of the plurality of signal pins, a decoder, and a level shifter configured to control the radio-frequency switch, the at least one pin electrically coupled to both a serial input and a parallel input.

Abstract: Disclosed are systems, circuits and methods related to low-loss bypass of a radio-frequency (RF) filter or diplexer. In some embodiments, a switching network circuitry can include a first switch that has an input pole configured to receive a radio-frequency (RF) signal, a pass-through throw configured to be connectable to the input pole to allow routing of the RF signal to an RF component, and at least one dedicated bypass throw configured to be connectable to the input pole and at least one bypass conduction path. The switching network circuitry can further include a second switch that has a pole and a throw, and is connectable between an output of the RF component and the bypass conduction path. Use of the dedicated bypass throw(s) in the first switch allows implementation of low-loss bypass of the filter or diplexer.

Abstract: Integrated filter and electromagnetic coupler assemblies. In certain examples, an integrated filter and electromagnetic coupler assembly includes a filter having a capacitance and a series inductance, the series inductance being connected between an input port and an output port of the integrated filter and electromagnetic coupler assembly, and combination of the capacitance and the series inductance being selected to provide the filter with a passband and a stopband. The integrated filter and electromagnetic coupler assembly further includes a coupling element positioned physically proximate the series inductance and extending between a coupled port and an isolation port of the integrated filter and electromagnetic coupler assembly, the integrated filter and electromagnetic coupler assembly being configured to provide at the coupled port a coupled signal via inductive coupling between the series inductance and the coupling element responsive to receiving an input signal at the input port.

Abstract: Provided herein are apparatus and methods for reconfigurable directional couplers in an RF transceiver. Reconfigurable directional couplers can be reconfigured and designed to provide high directivity using configurable capacitors to effect a mutual coupling and using lumped components or delay lines to effect a phase shift. Depending on the embodiment, the reconfigurable directional coupler can include capacitors, inductors, and switching components. The coupler can be designed for multi-band operation with an adjustable coupling factor conducive to semiconductor process integration. The coupler can have variable phase shifters to achieve a desired level of directivity in the coupler.

Abstract: An electromagnetic coupler assembly includes a handle wafer having an oxide layer disposed on a first surface thereof. A layer of active semiconductor is disposed on the oxide layer and includes a voltage terminal to receive a supply voltage. A layer of dielectric material is disposed on the layer of active semiconductor. A main transmission line is disposed on the layer of dielectric material. A coupled transmission line is disposed on the layer of active semiconductor and is one of inductively coupled to the main transmission line and capacitively coupled to the main transmission line. At least a portion of one of the main transmission line and the coupled transmission line is disposed directly above at least a portion of the layer of active semiconductor.

Abstract: A filtered electromagnetic coupler includes a main transmission line extending between an input port and an output port, and a coupled line section extending between a coupled port and an isolation port. The coupler is configured to couple signal power from the main transmission line to provide coupled signals at the coupled port, and a filter subsystem is connected to the coupled port to filter the coupled signals. The filter subsystem includes filters configured to pass or reject coupled signals by frequency, and the filter subsystem provides the filtered output signal to a measurement node.

Abstract: A radio-frequency switch is disclosed, comprising a set of field-effect transistors disposed between a first node and a second node. In some embodiments, each field-effect transistor of the set of field-effect transistors has a respective source, drain, gate, and body. In some embodiments, the radio-frequency switch includes a compensation circuit coupled in parallel with the set of field-effect transistors, the compensation circuit configured to compensate a non-linearity effect generated by the set of field-effect transistors.

Abstract: Provided herein are methods of reconfiguring directional couplers in an RF transceiver. The methods can include designing and reconfiguring the directional couplers to provide high directivity and a desired coupling factor using configurable capacitors to effect a mutual coupling and using lumped components or delay lines to effect a phase shift. The reconfigurable directional couplers can be designed for multi-band operation with an adjustable coupling factor conducive to semiconductor process integration. The reconfigurable directional couplers can have variable phase shifters to achieve a desired level of directivity in the coupler. In various examples, the methods include monitoring the frequency of power signals received by the reconfigurable directional couplers, and adjusting the configurable capacitors and/or variable phase shifters to maintain desired directivity and coupling factors over multi-band operation of the reconfigurable directional couplers.

Abstract: Provided herein are apparatus and methods for reconfigurable directional couplers in an RF transceiver. Reconfigurable directional couplers can be reconfigured and designed to provide high directivity using configurable capacitors to effect a mutual coupling and using lumped components or delay lines to effect a phase shift. Depending on the embodiment, the reconfigurable directional coupler can include capacitors, inductors, and switching components. The coupler can be designed for multi-band operation with an adjustable coupling factor conducive to semiconductor process integration. The coupler can have variable phase shifters to achieve a desired level of directivity in the coupler.

Abstract: Radio-frequency (RF) switch circuits having switchable transistor coupling for improved switching performance. An RF switch system includes at least one field-effect transistor (FET) disposed between first and second nodes, each FET having a gate and body. A switchable resistive coupling circuit is connected to each of the respective gates. A switchable resistive grounding circuit is connected to each of the respective bodies. The RF switch system also includes a compensation circuit to compensate a non-linearity effect generated by at least one of the field-effect transistors.

Abstract: Multi-output electromagnetic couplers configured to detect multiple frequencies simultaneously, and devices and systems including same. In one example a multi-output electromagnetic coupler includes a main coupler transmission line extending between and electrically connecting an input port and an output port, a first coupled line section configured to couple electromagnetic power in a first frequency band from the main coupler transmission line to provide a first coupled output signal at a first coupled port, and a second coupled line section configured to couple electromagnetic power in a second frequency band from the main coupler transmission line to provide a second coupled output signal at a second coupled port simultaneously with the first coupled output signal being provided at the first coupled port.

Abstract: An antenna switch module includes a radio-frequency input port, a radio-frequency output port, a radio-frequency core connected between the radio-frequency input port and the radio-frequency output port, the radio-frequency core being configured to operate in each of a plurality of operational states, the plurality of operational states including a first subset of operational states and a second subset of operational states, and a decoder configured to receive an input signal indicating a first operational state of the radio-frequency core, the first operational state being of the first subset of operational states, generate an output control signal corresponding to the first operational state, detect a transition of the radio-frequency core to a second operational state, determine that the second operational state is of the second subset of operational states, and insert an intermediate output signal corresponding to an intermediate operational state of the radio-frequency core in response to said determinat

Abstract: A coupling methodology and circuit arrangements to provide multi-frequency simultaneous power measurement. In one example, a wireless device front-end apparatus includes a plurality of antenna swap switches each connected to first and second antenna contacts, and a plurality of electromagnetic couplers each having an input port to receive a input signal of a unique frequency, a coupled port that provides a coupled signal based on the input signal, an output port connected to one of the plurality of antenna swap switches, and an isolation port. The apparatus further includes a termination network including a plurality of termination loads, and an output switch network configured to selectively connect the coupled port of each electromagnetic coupler to a coupler output bank to provide the coupled signals at the coupler output bank, and to selectively connect the isolation port of each electromagnetic coupler to one of the plurality of termination loads.

Abstract: A semiconductor die comprises a first active device, at least one of a second active device and a passive component, and electromagnetic shielding configured to at least partially electromagnetically isolate the first active device from the at least one of the second active device and the passive component. The electromagnetic shielding includes one of a grounded metal layer and via stack, and a grounded metal layer disposed one of above and below the first active device.

Abstract: Radio-frequency (RF) switch circuits having switchable transistor coupling for improved switching performance. An RF switch system includes at least one field-effect transistor (FET) disposed between first and second nodes, each FET having a gate and body. A switchable resistive coupling circuit is connected to each of the respective gates. A switchable resistive grounding circuit is connected to each of the respective bodies. The RF switch system also includes a compensation circuit to compensate a non-linearity effect generated by at least one of the field-effect transistors.

Abstract: Electromagnetic coupler systems including built-in frequency detection, and modules and devices including such. One example of an electromagnetic coupler system include an electromagnetic coupler having an input port, an output port, a coupled port, and an isolation port, the electromagnetic coupler including a main line extending between the input port and the output port, and a coupled line extending between the coupled port and the isolation port, the electromagnetic coupler being configured to produce a coupled signal at the coupled port responsive to receiving an input signal at the input port. An adjustable termination impedance is connected to the isolation port. A frequency detector is connected to the adjustable termination impedance and to the coupled port, and configured to detect a frequency of the coupled signal and provide an impedance control signal to tune the adjustable termination impedance based on the frequency of the coupled signal.

Abstract: Aspects of this disclosure relate to a radio frequency coupler with a multi-section coupled line. In an embodiment, an apparatus includes a radio frequency coupler that includes a power input port, a power output port, a coupled port, a multi-section coupled line, and a switch configured to adjust an effective length of the multi-section coupled line electrically connected to the coupled port.