Various embodiments disclosed herein enable steerable, time division duplex (“TDD”) communications channels at millimeter-wave frequency bands. Among other things, embodiments disclosed herein provide improved steering accuracy and power distribution, lower power consumption, and potentially longer service life than previous transceiver systems.

A communication device according to an embodiment includes an oscillator, a first signal generation circuit, a first insulation element, a first receiving circuit, and a first output circuit. The oscillator is configured to output a first carrier signal when at least one of a plurality of input signals that are externally input is at a first logic level. The first carrier signal and a first input signal among the input signals are input to the first signal generation circuit. The first signal generation circuit is configured to generate a first signal when the first input signal changes from a second logic level to the first logic level, output a first modulated signal based on the first signal, and thereafter output a second modulated signal based on the first carrier signal.

A communication device according to an embodiment includes an oscillator, a first signal generation circuit, a first insulation element, a first receiving circuit, and a first output circuit. The oscillator is configured to output a first carrier signal when at least one of a plurality of input signals that are externally input is at a first logic level. The first carrier signal and a first input signal among the input signals are input to the first signal generation circuit. The first signal generation circuit is configured to generate a first signal when the first input signal changes from a second logic level to the first logic level, output a first modulated signal based on the first signal, and thereafter output a second modulated signal based on the first carrier signal.

Disclosed is a radar apparatus including: a local oscillator for outputting a local oscillation signal; a transmitter unit; and a receiver unit. The transmitter unit includes: a transmission input configured to receive the local oscillation signal; and a transmitter configured to transmit a transmission signal based on the local oscillation signal that has been received via the transmission input. The receiver unit includes: a reception input configured to receive the local oscillation signal not via the transmission input; a receiver configured to receive a reflection wave based on the transmission signal; a cancel signal generator configured to generate a cancel signal based on the local oscillation signal that has been received via the reception input; and an adder configured to superimpose the cancel signal on a reception signal.

An integrated circuit is disclosed. The integrated circuit includes a set of transceivers comprising a plurality of transceivers, all configured to transmit in the same transmit frequency band and receive in the same receive frequency band. Furthermore, the integrated circuit has a set of frequency synthesizers including a separate frequency synthesizer associated with each transceiver in the set of transceivers, wherein each frequency synthesizer in the set is configured to generate a local-oscillator (LO) signal to its associated transceiver. Moreover, the integrated circuit includes a control circuit configured to control the set of frequency synthesizers such that nearest neighbors in the set of frequency synthesizers generate LO signals at different frequencies (f.sub.1, f.sub.2, f.sub.3, f.sub.4).

An integrated circuit is disclosed. The integrated circuit includes a set of transceivers comprising a plurality of transceivers, all configured to transmit in the same transmit frequency band and receive in the same receive frequency band. Furthermore, the integrated circuit has a set of frequency synthesizers including a separate frequency synthesizer associated with each transceiver in the set of transceivers, wherein each frequency synthesizer in the set is configured to generate a local-oscillator (LO) signal to its associated transceiver. Moreover, the integrated circuit includes a control circuit configured to control the set of frequency synthesizers such that nearest neighbors in the set of frequency synthesizers generate LO signals at different frequencies (f.sub.1, f.sub.2, f.sub.3, f.sub.4).

An embodiment integrated electronic device comprises a mixer module including a voltage/current transconductor stage including first transistors and connected to a mixing stage including second transistors, wherein the mixing stage includes a resistive degeneration circuit connected to the sources of the second transistors and a calibration input connected to the gates of the second transistors and intended to receive an adjustable calibration voltage, and the sources of the first transistors are directly connected to a cold power supply point.

Examples provide an adaptation circuit and apparatus, method and computer programs for adapting, fabricating and operating, a radio transceiver, a mobile transceiver, a base station transceiver and storage for computer programs or instructions. The adaptation circuit (10) is configured to adapt a local oscillator signal in a radio transceiver (30). The radio transceiver (30) comprises a transmission branch (14) and a reception branch (16), which are subject to cross-talk. The reception branch (16) comprises a local oscillator (18) configured to generate the local oscillator signal. The adaptation circuit (10) comprises a control module (12) configured to determine crosstalk level information between the transmission branch (14) and the reception branch (16), and to adapt the local oscillator signal based on the crosstalk level information.

Examples provide an adaptation circuit and apparatus, method and computer programs for adapting, fabricating and operating, a radio transceiver, a mobile transceiver, a base station transceiver and storage for computer programs or instructions. The adaptation circuit (10) is configured to adapt a local oscillator signal in a radio transceiver (30). The radio transceiver (30) comprises a transmission branch (14) and a reception branch (16), which are subject to cross-talk. The reception branch (16) comprises a local oscillator (18) configured to generate the local oscillator signal. The adaptation circuit (10) comprises a control module (12) configured to determine crosstalk level information between the transmission branch (14) and the reception branch (16), and to adapt the local oscillator signal based on the crosstalk level information.

An integrated circuit is disclosed. The integrated circuit includes a set of transceivers comprising a plurality of transceivers, all configured to transmit in the same transmit frequency band and receive in the same receive frequency band. Furthermore, the integrated circuit has a set of frequency synthesizers including a separate frequency synthesizer associated with each transceiver in the set of transceivers, wherein each frequency synthesizer in the set is configured to generate a local-oscillator (LO) signal to its associated transceiver. Moreover, the integrated circuit includes a control circuit configured to control the set of frequency synthesizers such that nearest neighbors in the set of frequency synthesizers generate LO signals at different frequencies (f.sub.1, f.sub.2, f.sub.3, f.sub.4).