Rohde & Schwarz

The present invention relates to a differential directional coupler for processing differential signals, a method thereof, and a printed circuit board (PCB) comprising the coupler. The coupler features a differential feed line with a positive and a negative signal path, each connected to respective directional couplers. The couplers are interconnected to form a virtual ground by shorting their isolation ports, thereby eliminating the need for discrete resistive loads. This design simplifies manufacturing, reduces production costs, and allows compact integration into PCBs while maintaining robust performance, high directivity, and minimal signal reflections. This differential directional coupler efficiently extracts controlled fractions of differential signals for monitoring or measurement purposes without degrading the signal integrity, making it suitable for high-density, high-performance RF systems.

A radio frequency, RF, frontend (12) for a vector network analyzer, VNA, measurement system (10) is described. The RF frontend (12) comprises a first frontend portion (20) and a second frontend portion (22). The first frontend portion (20) comprises a first directional unit (28) being configured to couple an RF signal traveling towards at least one port (16) out of at least one measurement path (18). The first frontend portion (20) further comprises a second directional unit (34) being configured to couple an RF signal traveling away from the at least one port (16) out of the at least one measurement path (18). The second frontend portion (22) comprises a frequency combining unit (42) and a switching stage (40) having a first switching state and a second switching state such that the second frontend portion (22) provides two different functionalities associated with the two switching states. In the first switching state of the switching stage (40), a stimulus RF signal is coupled into the measurement path (18) by means of the frequency combining unit (42), which is used as a reference signal for performing measurements. In the second switching state of the switching stage (40), the RF signal traveling away from the at least one port (16) is coupled out of the measurement path (18) by means of the frequency combining unit (42).

The invention relates to a test system (54) for electromagnetic compatibility testing. The test system (54) comprises an anechoic chamber (56) and a biconical antenna assembly (10). The biconical antenna assembly (10) has an antenna feed point (12), a first antenna structure (14) and a second antenna structure (16). The first antenna structure (14) and the second antenna structure (16) extend from the antenna feed point (12) towards opposite directions. The biconical antenna assembly (10) comprises a first additional capacitive structure (28) that is attached to the first antenna structure (14) and a second additional capacitive structure (30) that is attached to the second antenna structure (16). The anechoic chamber (56) has a floor (58). An electromagnetic layer (60) made from a material with high dielectric properties is provided between the biconical antenna assembly (10) and the floor (58). The electromagnetic layer (60) has lower electrically conducting properties in comparison to the floor (58) of the anechoic chamber (56).

A speed-based transmission scheme switching method of switching a transmission scheme between a transmitter node (12) and a receiver node (14) is described. The speed-based transmission scheme switching method comprises the steps of- determining at least one speed parameter, wherein the at least one speed parameter comprises a speed of the transmitter node (12), a speed of the receiver node (14), and/or a relative speed between the transmitter node (12) and the receiver node (14); and- switching, based on the at least one speed parameter determined, between a first transmission scheme being associated with a lower range of the at least one speed parameter and a second transmission scheme being associated with a higher range of the at least one speed parameter.Further, a communication system (10) as well as a test and/or measurement system are described.

The present invention provides a system for monitoring a wireless link, comprising a deflector device including a deflector and a control unit, wherein the deflector is configured to passively deflect a part of a signal of the wireless link incident from a first direction to a second direction, wherein the control unit is configured to control the orientation of the deflector, and a processing device configured to receive and process the deflected signal and visualize a content and/or a HF parameter of the signal to a user. The invention further provides a corresponding method for monitoring a wireless link.

A system for measurement management is configured to obtain a configuration set and an associated configuration unique identifier (UID). The system is also configured to obtain at least one measurement result and an associated result UID. A relation between the configuration UID and the result UID is determined, and the relation is stored.

The disclosure relates to a test system for testing a JCAS-DUT (23) comprising a first subsystem (10) configured to transmit at least one first JCAS signal into an environment, receive at least one second JCAS signal from the environment, receive at least one sensing information from the environment, and generate at least one channel and environment parameter based on the at least one first JCAS signal, the at least one second JCAS signal, and the sensing information. The test system comprises a second subsystem (20) which is communicatively coupled to the first subsystem (10), wherein the second subsystem is configured to: receive the at least one channel and environment parameter from the first subsystem (10), generate at least one signal waveform, adapt the at least one signal waveform according to the at least one channel and environment parameter and transmit the adapted signal waveform to the JCAS-DUT (23), receive at least one communication and sensing information output by the JCAS-DUT (23) in response to the adapted signal waveform, and generate at least one performance information based on said at least one communication and sensing information.

The invention relates to a test and/or measurement system (10) having a processing circuit (18) configured to process a signal and to determine at least a first presentation based on a first parameter and a second presentation based on a second parameter when processing the signal, wherein the second parameter is different to the first parameter. The test and/or measurement system (10) comprises a display (16) connected with the processing circuit (18), which is configured to display either the first presentation or the second presentation at the same time. The test and/or measurement system (10) comprises a storage medium (20) configured to store first data associated with the first presentation and second data associated with the second presentation. Further, a computer-implemented method of gathering data of a signal as well as a computer program product are described.

A system for scanning persons and/or objects is provided. Said system comprises at least two scan modules (11a, 11b) for transmitting and/or receiving radio frequency, RF, signals with respect to the persons and/or objects, each of said at least two scan modules (11a, 11b) comprising at least one transmit antenna and/or at least one receive antenna and/or at least one transceiver, and a crossing-through passage (12) to be passed by the persons and/or objects, wherein the at least two scan modules (11a, 11b) are angled to allow reflections of the RF signals from at least one of the at least two scan modules (11a, 11b) to at least one other one of the at least two scan modules (11a, 11b).

The present disclosure relates to a polarization detection system for detecting a polarization of a ranging device. The polarization detection system comprises: at least two receiving elements with different polarizations, wherein the at least two receiving elements are configured to receive an EM signal emitted by the ranging device; a power and/or phase detector configured to detect individual signal power and/or phase information of the EM signal received with the at least two receiving elements; and a processor configured to determine the polarization of the EM signal based on the individual signal power and/or phase information. The processor is further configured to: determine a signal power value of the EM signal based on the individual signal power information and the polarization of the EM signal, control one or more transmitting elements of a ranging test system to transmit an EM response signal based on the determined polarization of the EM signal, and/or adapt an RCS value of the EM response signal based on the determined polarization of the EM signal.