An apparatus includes an impedance matching network, a first switch circuit, and a second switch circuit. The impedance matching network generally comprises a first port, a second port, and a third port. The first switch circuit may be coupled between the first port and a circuit ground potential. The second switch circuit may be coupled between the second port and the circuit ground potential. The impedance matching network generally provides a first impedance value for the first port and for the third port when the second port is connected to the circuit ground potential. The impedance matching network generally provides a second impedance value for the second port and for the third port when the first port is connected to the circuit ground potential. The first impedance value and the second impedance value are asymmetrical.

An apparatus include a package, a chip and a plurality of bumps. The package may include (i) a plurality of bonding pads configured to exchange a plurality of radio-frequency signals with an antenna panel and (ii) a plurality of transmission lines configured to exchange the radio-frequency signals with the bonding pads. Two of the transmission lines may be connected to each of the bonding pads. The chip may be disposed in the package and may include (i) a plurality of transceiver channels configured to exchange the radio-frequency signals with the transmission lines and (ii) a plurality of switches configured to switch the radio-frequency signals to a signal ground. The bumps may be configured to exchange the radio-frequency signals between the transmission lines of the package and the transceiver channels of the chip. The transmission lines, the bumps and the switches may form a plurality of transmit/receive switches.

A bi-directional coupler architecture that allows an entire radio frequency coupler to be fully integrated with other circuitry on a single IC substrate. Embodiments of the invention use a lumped component architecture instead of quarter-wave transmission lines to reduce area and limit loss on the primary signal line. In some embodiments, two directional couplers of opposite polarities are implemented at least in part using spiral secondary inductors electromagnetically coupled to a shared primary inductor signal line, thus providing a bi-directional coupler architecture.

An apparatus for a network matching switch is provided. The apparatus includes a primary winding, a first secondary winding, a second secondary winding and a plurality of matching network paths. The primary winding is configured to generate a magnetic field based on an analog input signal. The first secondary winding is configured is inductively coupled to the primary winding. The second secondary winding is inductively coupled to the primary winding. The plurality of matching network paths are coupled to the first secondary winding and the second secondary winding. An active path is selected from the plurality of matching network paths and provides power to an active load.

A bi-directional coupler architecture that allows an entire radio frequency coupler to be fully integrated with other circuitry on a single IC substrate. Embodiments of the invention use a lumped component architecture instead of quarter-wave transmission lines to reduce area and limit loss on the primary signal line. In some embodiments, two directional couplers of opposite polarities are implemented at least in part using spiral secondary inductors electromagnetically coupled to a shared primary inductor signal line, thus providing a bi-directional coupler architecture.

A wireless communication device includes a first low-noise amplifier (LNA). The wireless communication device also includes a first LNA load circuit coupled to an output of the LNA. The wireless communication device further includes a power splitter switchably coupled to the first LNA load circuit. The power splitter includes a negatively coupled transformer and is switchably coupled to multiple outputs.

Certain aspects of the present disclosure provide a directional coupler. In certain aspects, the directional coupler generally includes a first inductor and a second inductor wirelessly coupled to the first inductor. In certain aspects, the directional coupler generally includes an input port at a first terminal of the first inductor and a transmitted port at a second terminal of the first inductor. In certain aspects, the directional coupler generally includes a coupled port at a first terminal of the second inductor and an isolated port at a second terminal of the second inductor. In certain aspects, the directional coupler generally includes a first complex impedance component directly coupled to the isolated port and a second complex impedance component directly coupled to the coupled port.

A system having a set of power amplifiers each having a primary inductive structure configured to provide an output signal. A secondary inductive structure is configured to inductively couple to each of the primary inductive structures. A transmission line is provided with a signal trace and a ground trace. The signal trace of the transmission line is connected to a first end of the secondary inductive structure. A return path from a second end of the secondary inductive structure is coupled via a resonant network to the ground trace of the transmission line, in which the return path is spaced away from the secondary inductive structure to minimize inductive coupling to the primary structures.

An RF transmitter with a power combiner and a differential amplifier is provided. The power combiner converts a differential output signal to a single-end output signal and transmits the single-end output signal to the antenna. The differential amplifier includes common-source input transistors, common-gate output transistors and a switch module. The common-source input transistors amplify a differential input signal and output an amplified differential signal. The common-gate output transistors, including sources electrically coupled to the common-source input transistors and drains electrically coupled to the power combiner, generate the differential output signal according to the amplified differential signal. The switch module is electrically coupled between the gates. The switch module electrically couples the gates of the common-gate output transistors if the RF transmitter is in operation and electrically isolates the gates if the RF receiver is in operation.

An apparatus includes an input port, an output port, a common port, a first impedance matching network, a second impedance matching network, a first switch circuit, and a second switch circuit. The first impedance matching network may be coupled between the input port and the common port. The second impedance matching network may be coupled between the common port and the output port. The first switch circuit may be coupled between the input port and a circuit ground potential. The second switch circuit may be coupled between the output port and the circuit ground potential. The first and the second impedance matching networks are asymmetrical.