Abstract: A signal coupling system may include a directional coupler that includes a first conductor and a second conductor. The first conductor may include a first end and a second end and may be generally arranged along a first plane. The second conductor may include a third end and a fourth end and may generally be arranged as a plurality of windings along a second plane. The signal coupling system may also include a transceiver, electrically conductively conducted to the first end; and an antenna, electrically conductively conducted to the second end. The second conductor may be configured to generate a coupling with the first conductor when the first conductor conducts an electric signal, such that the coupler conducts a first electrical signal from the first end to the second end at a second power, and conducts the electrical signal via the coupling to the third end at a third power.

Abstract: An apparatus includes an impedance circuit and a plurality of inductors coupled to the impedance circuit. Each of the plurality of inductors is coupled in parallel to a corresponding switch of a plurality of switches.

Abstract: A millimeter-wave radio frequency front-end circuit is provided. The front-end circuit comprises a millimeter-wave antenna configured to receive and transmit millimeter-wave signals; a matching network including at least a first inductor and a second inductor connected in parallel, wherein the matching network ensures impedance matching with the antenna when transmitting and receiving the millimeter wave signals; a power amplifier coupled to the antenna through the matching network; a low noise amplifier coupled to the antenna through the matching network, wherein the power amplifier is on and the low noise amplifier is off when transmitting the millimeter-wave signals, and the power amplifier is off and the low noise amplifier is on when receiving the millimeter-wave signals.

Abstract: An apparatus includes an impedance circuit and a plurality of inductors coupled to the impedance circuit. Each of the plurality of inductors is coupled in parallel to a corresponding switch of a plurality of switches.

Abstract: A millimeter-wave radio frequency front-end circuit is provided. The front-end circuit comprises a millimeter-wave antenna configured to receive and transmit millimeter-wave signals; a matching network including at least a first inductor and a second inductor connected in parallel, wherein the matching network ensures impedance matching with the antenna when transmitting and receiving the millimeter wave signals; a power amplifier coupled to the antenna through the matching network; a low noise amplifier coupled to the antenna through the matching network, wherein the power amplifier is on and the low noise amplifier is off when transmitting the millimeter-wave signals, and the power amplifier is off and the low noise amplifier is on when receiving the millimeter-wave signals.