The present invention relates to a communication node arrangement comprising at least two antenna units. Each antenna unit comprises at least one signal port and at least one antenna element, where each signal port is connected to at least one corresponding antenna element. Each antenna unit comprises at least one sensor unit arranged to sense its orientation relative a predetermined reference extension. The communication node arrangement comprises at least one control unit and is arranged to feed a respective test signal into each of at least two different signal ports. For each such test signal, the communication node arrangement is arranged to receive the test signal via at least one other signal port. The communication node arrangement being arranged to determine relative positions of said antenna units based on the received test signals, and to determine relative orientations of said antenna units based on data received from the sensor units.

An electronic device, a cable, and a method of driving the same are provided. The cable that transmits data and power includes a notification device comprising notification circuitry configured to output a notification when the power is transmitted, a first connector positioned at one end of the cable, a second connector positioned at an other end of the cable, a wire connecting the first and second connectors and including a data line that transmits the data and a power line that transmits the power, and a cable controller connected to the power line and configured to identify a characteristic of power transmitted through the power line and to change a form of the notification output from the notification device based on the identified power characteristic.

An electronic device, a cable, and a method of driving the same are provided. The cable that transmits data and power includes a notification device comprising notification circuitry configured to output a notification when the power is transmitted, a first connector positioned at one end of the cable, a second connector positioned at an other end of the cable, a wire connecting the first and second connectors and including a data line that transmits the data and a power line that transmits the power, and a cable controller connected to the power line and configured to identify a characteristic of power transmitted through the power line and to change a form of the notification output from the notification device based on the identified power characteristic.

An external frontend device is described. The external frontend device includes an integrated synthesizer circuit, a reference signal input, a receiver channel, a transmitter channel, and at least one mixer circuit. The reference signal input is configured to receive a low-frequency reference signal. The reference signal input is configured to forward the received low-frequency reference signal to the integrated synthesizer circuit. The integrated synthesizer circuit is configured to generate a local oscillator (LO) signal based on the low-frequency reference signal. The at least one mixer circuit is associated with the receiver channel and/or with the transmitter channel. The at least one mixer circuit is configured to mix the LO signal with a radio frequency (RF) signal processed by the receiver channel and/or with an intermediate frequency (IF) signal processed by the transmitter channel, thereby obtaining an IF output signal and/or an RF output signal, respectively. Further, a frontend system is described.

An external frontend device is described. The external frontend device includes an integrated synthesizer circuit, a reference signal input, a receiver channel, a transmitter channel, and at least one mixer circuit. The reference signal input is configured to receive a low-frequency reference signal. The reference signal input is configured to forward the received low-frequency reference signal to the integrated synthesizer circuit. The integrated synthesizer circuit is configured to generate a local oscillator (LO) signal based on the low-frequency reference signal. The at least one mixer circuit is associated with the receiver channel and/or with the transmitter channel. The at least one mixer circuit is configured to mix the LO signal with a radio frequency (RF) signal processed by the receiver channel and/or with an intermediate frequency (IF) signal processed by the transmitter channel, thereby obtaining an IF output signal and/or an RF output signal, respectively. Further, a frontend system is described.

An apparatus comprises a radio frequency (RF) antenna circuit; an antenna aperture tuning circuit; an antenna impedance measurement circuit; and a processor circuit electrically coupled to the tunable antenna aperture circuit and the impedance measurement circuit. The processor circuit is configured to: set the antenna aperture tuning circuit to an antenna aperture tuning state according to one or more parameters of an RF communication network; initiate an antenna impedance measurement; and change the antenna aperture tuning state to an antenna aperture tuning state indicated by the antenna impedance.

In an embodiment, a communications system includes a first transmitter including a digital beamforming baseband section configured to receive an input signal to be transmitted, the input signal at a baseband frequency, and a modulation section electrically coupled to the digital beamforming baseband section and a first antenna of a phased array antenna. The modulation section is configured to receive a local oscillator signal at a first local oscillator frequency and apply a baseband frequency shift to the input signal to generate a baseband frequency shifted input signal. The modulation section generates a modulated signal based on the input signal. The communication system includes a second transmitter included in a second IC chip of the plurality of IC chips electrically coupled to a second antenna and configured to provide a second modulated signal at the carrier frequency and a second LO leakage signal at a second local oscillator frequency.

In an embodiment, a communications system includes a first transmitter including a digital beamforming baseband section configured to receive an input signal to be transmitted, the input signal at a baseband frequency, and a modulation section electrically coupled to the digital beamforming baseband section and a first antenna of a phased array antenna. The modulation section is configured to receive a local oscillator signal at a first local oscillator frequency and apply a baseband frequency shift to the input signal to generate a baseband frequency shifted input signal. The modulation section generates a modulated signal based on the input signal. The communication system includes a second transmitter included in a second IC chip of the plurality of IC chips electrically coupled to a second antenna and configured to provide a second modulated signal at the carrier frequency and a second LO leakage signal at a second local oscillator frequency.

Methods and systems for automated testing of extremely-high frequency devices are disclosed. A device under test (DUT) is set in a simultaneous transmit and receive mode. The DUT receives a lower frequency radio frequency (RF) signal from a test unit and up-converts the lower frequency RF signal to a higher frequency RF signal. The DUT transmits the higher frequency RF signal using a first antenna, and receives the higher frequency RF signal using a second antenna. The DUT down-converts the received higher frequency RF signal to a received test RF signal and provides the received test RF signal to the test unit for comparing measurements derived from the received test signal to a design specification for the DUT.

Methods and systems for automated testing of extremely-high frequency devices are disclosed. A device under test (DUT) is set in a simultaneous transmit and receive mode. The DUT receives a lower frequency radio frequency (RF) signal from a test unit and up-converts the lower frequency RF signal to a higher frequency RF signal. The DUT transmits the higher frequency RF signal using a first antenna, and receives the higher frequency RF signal using a second antenna. The DUT down-converts the received higher frequency RF signal to a received test RF signal and provides the received test RF signal to the test unit for comparing measurements derived from the received test signal to a design specification for the DUT.