摘要:
In one embodiment, RF front-end circuit includes a tunable matching network having an input coupled to an RF interface port, a directional coupler with a first connection coupled to an RF input of a mixer, a second connection coupled to an RF signal generation port, and a third connection coupled to an output of the tunable matching network. The directional coupler is configured to direct a signal from the RF signal generation port to the tunable matching network and to direct a signal from the tunable matching network port to the RF port of the mixer. The RF front-end circuit also has a tunable matching network control unit coupled to the tunable matching network. The control unit is configured to optimize an impedance match between the RF interface port and the output of the tunable matching network.
摘要:
In one embodiment, RF front-end circuit includes a tunable matching network having an input coupled to an RF interface port, a directional coupler with a first connection coupled to an RF input of a mixer, a second connection coupled to an RF signal generation port, and a third connection coupled to an output of the tunable matching network. The directional coupler is configured to direct a signal from the RF signal generation port to the tunable matching network and to direct a signal from the tunable matching network port to the RF port of the mixer. The RF front-end circuit also has a tunable matching network control unit coupled to the tunable matching network. The control unit is configured to optimize an impedance match between the RF interface port and the output of the tunable matching network.
摘要:
Apparatus, methods and articles of manufacture for output impedance matching in multi-band power amplification are provided, wherein an output matching configuration comprising one or more output matching sections, a multi-band diplexer and a switch are connected to an active device.
摘要:
An amplifier includes a signal input, a first, second and third amplification path. A coupling element having a first and a second output terminal is coupled to respective input terminals of the first and second amplification paths, and is coupled with a third terminal to an input terminal of the third amplification path. In a first mode of operation the coupling element provides a signal at the first and second output terminals, wherein the signal at the second output terminal comprising a phase shift with respect to the signal at the first output terminal. In a second mode of operation, the coupling element provides a signal at the third output terminal, wherein the provided signal is received at the input terminal and reflected on the first and second output terminals.
摘要:
A method of processing an electromagnetic wave comprises regulating at least two independently controllable current sources with a signal determined from at least one characteristic of the electromagnetic wave to generate a processed electromagnetic wave from at least one of the independently controllable current sources.
摘要:
Apparatus, methods and articles of manufacture for output impedance matching in multi-band power amplification are provided, wherein an output matching configuration comprising one or more output matching sections, a multi-band diplexer and a switch are connected to an active device.
摘要:
A transmitter arrangement includes a first amplifier arrangement and a second amplifier arrangement. The first amplifier arrangement includes a first amplification path and a second amplification path. The first amplification path is adapted to amplify signals comprising a data content according to a first communication standard. The second amplification path is adapted to amplify signals comprising a data content according to a second communication standard. The second amplifier arrangement further includes a first and second amplification path sharing at least one common amplifier stage that is adapted to amplify signals having a data content according at least to the second communication standard.
摘要:
The power amplifier mainly includes a main amplifier, two splitters, one combiner, one subtracter, two phase shifters, one attenuator and one error amplifier. The splitters, subtracter and combiner are designed in the form of 90-degree or quadrature hybrid couplers. A quadrature hybrid can be implemented with any lumped or transmission-line elements and has an important advantage compared to the in-phase splitter that at equal values of reflection coefficients from loads connected to the in phase and 90° phase shift terminals, the reflection wave is lacking at the main input terminal and, consequently, the input voltage standing wave ratio of a quadrature hybrid does not depend on the equal load mismatch level.
摘要:
A transmitter arrangement includes a first amplifier arrangement and a second amplifier arrangement. The first amplifier arrangement includes a first amplification path and a second amplification path. The first amplification path is adapted to amplify signals comprising a data content according to a first communication standard. The second amplification path is adapted to amplify signals comprising a data content according to a second communication standard. The second amplifier arrangement further includes a first and second amplification path sharing at least one common amplifier stage that is adapted to amplify signals having a data content according at least to the second communication standard.
摘要:
One embodiment relates to a radar system. In one embodiment, an automotive radar system comprises a power amplifier configured to provide first and second anti-phase transmission signals to respective first and second differential couplers which are individually connected to respective first and second transceiving antennas. A first portion of the first anti-phase transmission signal is coupled to the first antenna and a second portion of the first anti-phase transmission signal is coupled to a third transceiving antenna by way of a third differential coupler. A first portion of the second anti-phase transmission signal is coupled to the second antenna and a second portion of the second anti-phase transmission signal is coupled to the third antenna by way of the third differential coupler. Configured in this manner, the radar system is operable to transmit and receive from the multiple antennas with high efficiency, while maintaining low-cost and reduced overall size.