Rohde & Schwarz

A movable test device (10) is provided for testing, especially during movement, of the synchronization of a base station (11, 15, 21, 31a, 31b, 31c, 31d, 41a, 41b) of a wireless network with reference to a reference time. The movable test device (10) may comprise a receiving unit (12) configured to measure a time of arrival for a synchronization and/or broadcast channel of the base station (11, 15), a location determination unit (13) configured to determine a measurement location of the movable test device (10), and configured to determine a base station location of the base station (11, 15) based on multilateration or based on a base station location database, a processing unit (14) connected to the receiving unit (12) and to the location determination unit (13), wherein the processing unit (14) is configured to determine a propagation time based on a distance between the base station location and the measurement location, determine a time of transmission based on the time of arrival and the propagation time, evaluate frame-timing, especially with respect to a reference time, based on the time of transmission, preferably with the aid of a model, and determine time-offset and/or drift of frame-start-times of the base station (11, 15) based on the frame-timing or based on the time of arrival, especially by solving a corresponding optimization problem.

An adaptive signaling method of signaling between a first node (12) and a second node (14) is described. The adaptive signaling method comprises the steps of - generating, by the first node (12), a transmission signal to be transmitted to the second node (14), wherein the transmission signal comprises information on a custom modulation scheme to be used for communication between the first node (12) and the second node (14), wherein the custom modulation scheme comprises a custom set of constellation points; and - adapting, by the second node (14), a modulation scheme and/or a demodulation scheme used by the second node (14) for subsequent communication with the first node (12) based on the information on the custom modulation scheme comprised in the transmission signal. Further, a communication system, as well as a test and/or measurement system are described.

The present disclosure relates to a quantum sensor device (10), comprising at least one sensing element (11) which is formed from non-conducting materials; wherein the sensing element (11) comprises a powder of a solid material, wherein the powder comprises particles with at least a fraction of said particles comprising defects. The quantum sensing device (10) further comprises a light source (12) configured to irradiate the sensing element (11) with a light beam, wherein the sensing element (11) is optically excited by the light beam; and an optical detector (13) configured to detect an optical response of the sensing element (11); wherein the quantum sensing device (10) is configured to determine a parameter of a magnetic and/or an electromagnetic field to be analyzed based on said optical response.

The present disclosure relates to a quantum sensor device (10), comprising a portable probe (11); and a quantum sensor (12) comprising a sensing volume which is configured to interact with an electric, a magnetic and/or an electromagnetic field to be analyzed; wherein the quantum sensor (12) is arranged in the portable probe (11). The quantum sensor device (10) further comprises a light source (17) configured to irradiate the sensing volume with a light beam, wherein the sensing volume is optically excited by the light beam.

A device (10) for radar pulse analysis with respect to a radar signal is provided. Said device (10) comprises a spectrogram capturing unit (11) configured to capture a spectrogram with respect to the radar signal, an analyzing unit (12) configured to identify at least one radar pulse in the spectrogram at least one certain point in time and to analyze respective characteristics of the at least one correspondingly identified radar pulse as radar pulse information, and a display unit (13) configured to display the spectrogram and/or the radar pulse information and/or to superimpose said radar pulse information in the spectrogram, especially such that with respect to the at least one correspondingly identified radar pulse, the radar pulse information is illustrated in the spectrogram in the at least one certain point in time.

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 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.

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.