Abstract: A reconfigurable GPR device for acquiring radar data about a medium includes a radar antenna with a first polarization, a processor unit connected to the antenna, and a casing around the antenna and the processor unit. Further the device includes at least one of a wheel assembly and a direction-determining unit. If present, the wheel assembly includes a holder, a wheel and a wheel rotation sensor. The wheel rotation sensor is connected to the processor unit, and an axis of the wheel is pivotal relative to the first polarization. If present, the direction-determining unit is connected to the processor unit and adapted to determine directional information. The directional information is descriptive of an angle between a direction of movement of the device and the first polarization.

Abstract: A reconfigurable ground penetrating radar (GPR) device, an autonomous GPR system and method of acquiring radar data about a medium. The GPR device includes a radar antenna with a first polarization, a processor unit connected to said antenna, a casing around the antenna and the processor unit, a wheel assembly including a holder, a wheel and a wheel rotation sensor. The wheel rotation sensor is connected to the processor unit and an axis of the wheel is pivotal relative to the first polarization.

Abstract: A ground-penetrating radar device comprises a frame, a radar antenna, and an antenna assembly, wherein the antenna is part of the antenna assembly. Further the GPR device comprises a mount for adaptively mounting the antenna assembly to the frame and a ground support for supporting the frame on the ground. In an operational state, the mount prevents a horizontal displacement of the antenna assembly relative to the frame in two horizontal directions. In the operational state, the mount further allows a vertical displacement of the antenna assembly relative to the frame and a tilting of the antenna assembly relative to the frame.

Abstract: A method and a device for probing a subsurface structure. The method includes sending an electromagnetic wave into the structure, receiving an echo of the electromagnetic wave from the structure and processing the echo for deriving an internal feature of the structure. The sending the electromagnetic wave into the structure includes subsequently sending a plurality of electromagnetic probe signals with differing frequency spectra into the structure. Each probe signal includes at least two non-zero spectral components. The receiving the echo includes receiving an echo signal for each probe signal. The processing the echo includes determining at least one amplitude and phase for each echo signal.

Abstract: A device for the non-destructive probing of a sample by means of electromagnetic wave reflection includes a metal body as part of its frame. The metal body forms a lateral wall and a separating wall enclosing an interior space. On a first side of the metal body, a shielding structure forms a plurality of shielded chambers for receiving RF circuitry. Interior space faces the second side of the metal body. A first circuit board containing driver and receiver circuitry is mounted to the first side of the metal body, and a second circuit board containing an antenna structure is mounted to the second side thereof.

Abstract: In order to accurately probe a structure of concrete, a series of probe signals with defined carrier frequencies are generated by a probe signal generator and coupled into the structure by an antenna. The returning echo signals are processed by an echo signal receiver. Processing includes phase and amplitude detection in a multiplier, frequency-specific scaling in a scaling unit, replacement of the measured phases and amplitudes in an interpolation unit, and the generation of time-domain data in a Fourier transformation module. The device is robust against RF noise, accurate and low-power.

Abstract: A device for the non-destructive probing of a sample by means of electromagnetic wave reflection includes a metal body as part of its frame. The metal body forms a lateral wall and a separating wall enclosing an interior space. On a first side of the metal body, a shielding structure forms a plurality of shielded chambers for receiving RF circuitry. Interior space faces the second side of the metal body. A first circuit board containing driver and receiver circuitry is mounted to the first side of the metal body, and a second circuit board containing an antenna structure is mounted to the second side thereof.

Abstract: A reconfigurable GPR device for acquiring radar data about a medium includes a radar antenna with a first polarization, a processor unit connected to the antenna, and a casing around the antenna and the processor unit. Further the device includes at least one of a wheel assembly and a direction-determining unit. If present, the wheel assembly includes a holder, a wheel and a wheel rotation sensor. The wheel rotation sensor is connected to the processor unit, and an axis of the wheel is pivotal relative to the first polarization. If present, the direction-determining unit is connected to the processor unit and adapted to determine directional information. The directional information is descriptive of an angle between a direction of movement of the device and the first polarization.

Abstract: In order to accurately probe a structure of concrete, a series of probe signals with defined carrier frequencies are generated by a probe signal generator and coupled into the structure by an antenna. The returning echo signals are processed by an echo signal receiver. Processing includes phase and amplitude detection in a multiplier, frequency-specific scaling in a scaling unit, replacement of the measured phases and amplitudes in an interpolation unit, and the generation of time-domain data in a Fourier transformation module. The device is robust against RF noise, accurate and low-power.