Abstract: Described is a wave guide adapter for a filling level radar. The adapter includes a decoupling member for reducing a leakage signal from a first line to a second line. The decoupling member is electrically isolated from the lines. Reducing the leakage signal increases the sensor's sensitivity at close range.

Abstract: For safety reasons the potential of an electrical supply line of a radar sensor should be separate from the potential of the filling level container. An arrangement for potential separation for a filling level radar includes a separation element for insulating the waveguide from the antenna. The separation element, corresponding to the cross section of the waveguide, is ring shaped. In this way rotatability between the sensor housing and the antenna subassembly is provided without influencing the signal line between the antenna and the waveguide.

Abstract: A level measuring instrument has a variable transmitting power for measuring a filling level in a tank. The level measuring instrument includes a generator unit selectively generating different transmitting powers. The generator unit is controlled so that the transmitting power is respectively adapted to the corresponding environmental conditions. For this purpose, the generator unit has for instance two different oscillators, which are driven selectively.

Abstract: The shape or amplitude of reference pulses in a filling level radar typically depend on the component quality of the circulator used, of a transmitting/receiving coupler, or else of the circuit temperature. In case of large echoes at close range, the quality of the measurement may deteriorate. A radar module for extracting a reference signal for a filling level radar comprises a tap extracting the reference signal and a delay line delaying the transmit signal. Delaying the transmit signal on its way to the antenna takes place after the extraction of the leakage pulse.

Abstract: This invention concerns a parabolic antenna with a parabolic reflector (2) having a parabolic reflector rim (20), a collar (9), which is positioned on the parabolic reflector (2), in particular on the parabolic reflector rim (20) and which has an outside collar rim (90), and having an exciter and/or a receiver (3), such that the exciter and/or receiver (3) are/is located in the axial direction (X) partly within the parabolic reflector rim (20) and partly outside thereof.

Abstract: A waveguide transition for a fill level radar may include a printed circuit board in which a resonator is integrated. Together with a coupling element, the resonator is used for decoupling high-frequency waves from a feed line, that is also integrated in the printed circuit board, to a waveguide that is screwed onto the printed circuit board. There is thus no need to provide an external resonator.

Abstract: For safety reasons the potential of an electrical supply line of a radar sensor may be separated from the potential of the fill level container. A fill level radar with potential separation includes a separation element for insulating the aerial from a feed device. The separation element is arranged directly at the aerial, or forms part of the aerial. In this way insulation of the aerial from the exterior of the container is provided.

Abstract: Described is a radar filling level measuring device for non-contact measurement of a filling level of a filling matter in a vessel. A radar filling level measuring device including an electronics unit for generating transmission signals and for evaluating receiving signals reflected for a filling matter, an antenna unit connected to the electronics unit and adapted to radiate the transmission signals generated by the electronics unit in the direction of the filling matter and to receive the receiving signals reflected from the filling matter surface and to pass them on to the electronics unit, and a housing forming a cavity which is at least tight with respect to the atmosphere within the vessel and in which the electronics unit and antenna unit are acommodated. By this structure both the antenna unit and the electronics unit are protected in a technically simple and cheap way against aggressive ambient conditions and against chemical and mechanically abrasive aggression.

Abstract: This invention concerns a parabolic antenna with a parabolic reflector (2) having a parabolic reflector rim (20), a collar (9), which is positioned on the parabolic reflector (2), in particular on the parabolic reflector rim (20) and which has an outside collar rim (90), and having an exciter and/or a receiver (3), such that the exciter and/or receiver (3) are/is located in the axial direction (X) partly within the parabolic reflector rim (20) and partly outside thereof.

Abstract: The present invention refers to a radar filling level measuring device (1) for non-contact measurement of a filling level of a filling matter in a vessel (7). A radar filling level measuring device of the present invention comprises an electronics unit (4) for generating transmission signals and for evaluating receiving signals reflected for a filling matter, an antenna unit (6a; 6b) connected to the electronics unit (4) and adapted to radiate the transmission signals generated by the electronics unit (4) in the direction of the filling matter and to receive the receiving signals reflected from the filling matter surface and to pass them on to the electronics unit (4), and a housing (2, 3, 16) forming a cavity (11) which is at least tigh with respect to the atmosphere within the vessel (7) and in which the electronics unit (4) and antenna unit (6a, 6b) are acommodated.

Abstract: The present invention relates to an antenna system for a level measuring device for emitting microwaves by means of an antenna horn, at the front side of the small funnel aperture thereof. HF energy in the form of microwave signals is directly axially coupled by means of planar structures having one patch or several patches.

Abstract: A plug-in connection comprises a plug and a socket having inner and outer conductors both connected with the coaxial line, and which are also constituted by an inner and an outer conductor. Within the plug-in connection, a dielectric material is provided for a galvanic separation of the outer conductor of the socket with respect to the outer conductor of the plug.

Abstract: The microwave pulse generator of the invention for generating microwave pulses with a pulse duration in the nanosecond range has a pulse generator that generates pulses of constant width, and a microwave resonant circuit for generating microwave oscillations. Additionally provided is a pulse-shortening stage, to which the pulses from the pulse generator are fed and which generates output pulses in the nanosecond range. The output pulses are fed as supply voltage pulses to a microwave oscillator, at the output of which the microwave pulses can be picked off. A voltage-controlled varicap diode arrangement is provided to influence the pulse lengths and/or pulse amplitudes.

Abstract: The microwave pulse generator of the invention for generating microwave pulses with a pulse duration in the nanosecond range has a pulse generator that generates pulses of constant width, and a microwave resonant circuit for generating microwave oscillations. Additionally provided is a pulse-shortening stage, to which the pulses from the pulse generator are fed and which generates output pulses in the nanosecond range. The output pulses are fed as supply voltage pulses to a microwave oscillator, at the output of which the microwave pulses can be picked off. A voltage-controlled varicap diode arrangement is provided to influence the pulse lengths and/or pulse amplitudes.

Abstract: A filling-level measuring device, specifically a filling-level radar system, comprises a transmitter (1), a receiver (2) for an echo of a signal emitted by the transmitter (1), and an evaluation circuit (3) for estimating the filling level. The transmitter (1) and the receiver (2) are suitable for operation with a plurality of frequencies on the part of the emitted signal and the echo.

Abstract: The invention relates to a horn antenna for a radar-filling level measuring device having an antenna envelope (3) that comprises a flaring hollow space (4) of the antenna, in which a filling (10) is present at least in part filling up said hollow space (4) of the antenna, and having an encasing (10, 20) of a dielectric material and enclosing the outside of the antenna envelope (3) and closing the opening (3a) of the hollow space of the hollow space (4) of the antenna.

Abstract: The present invention relates to an antenna system for a level measuring device for emitting microwaves by means of an antenna horn (2), at the front side of the smaller funnel aperture thereof, HF energy in the form of microwave signals is directly axially coupled by means of planar structures having one patch or several patches (4).

Abstract: The invention relates to a plug-in connection for galvanically separating microwave signals in coaxial lines, so as to comply with the requirements made on an explosion-proof separation. The plug-in connection comprises a plug and a socket having inner and outer conductors both connected with the coaxial line, and which are also constituted by an inner and an outer conductor. Within the plug-in connection, a dielectric material is provided so as to guarantee a galvanic separation of the outer conductor of the socket with respect to the outer conductor of the plug. In another embodiment, also a galvanic separation of the inner conductor is realized apart from the galvanic separation of the inner conductor.

Abstract: An antenna connected to a waveguide can be used for level measurements of a bulk material by measuring the reflection of microwave radiation radiated towards the surface of the bulk material. Condensate droplets forming on the antenna may produce higher modes and echoes in the microwave signal. The effect caused by droplets can be ameliorated by increasing the size of the antenna and the waveguide. To obtain a usable measurement signal, a compromise between reducing the interference from condensate droplets and optimizing the electrical characteristics has to be found. The invention is directed to a waveguide which is designed to propagate at a particular frequency only the fundamental mode, while the antenna itself is capable of supporting higher order modes. A taper which is a dimensioned so as to transmit only the fundamental mode of the microwave signal, is placed between the waveguide and the antenna.

Abstract: The invention relates to a horn antenna for a radar-filling level measuring device having an antenna envelope (3) that comprises a flaring hollow space (4) of the antenna, in which a filling (10) is present at least in part filling up said hollow space (4) of the antenna, and having an encasing (10, 20) of a dielectric material and enclosing the outside of the antenna envelope (3) and closing the opening (3a) of the hollow space of the hollow space (4) of the antenna.