Eckhard Denicke

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This paper presents a compact free-space measurement system for the characterization of dielectric materials within the X-band based on the line-network-network (LNN) calibration method. Using a pair of dielectric-filled horn antennas with enhanced directivity, the setup exhibits a total length of 250 mm between the antenna apertures and is suitable for(More)
This contribution deals with a concept for the realization of compact mode-preserving waveguide transitions. For radar distance measurements, the cross-section of a single-moded waveguide is enlarged to an overmoded circular waveguide. In order to obtain a mostly monomode signal propagation within the waveguide, a parabolic waveguide transition in(More)
Dielectric antenna solutions for industrial radar level measurements are presented to provide monostatic radar operation from 8.5 to 10.5 GHz. Size limited directional antennas having low side lobe levels and marginal ringing properties are needed. Therefore, circular waveguide-fed travelling wave antennas for endfire radiation, incorporating cylindrical(More)
In this contribution, a flexible radar system simulator is introduced emulating a widely used radar test range to efficiently evaluate the effects of antenna design in terms of monostatic radar operation for tank level measurements. Typically, prototypes of novel antenna designs are tested in a scenario consisting of distinct reflectors, like e.g. trihedral(More)
Monostatic radar systems are the state-of-the-art solution for precise and robust level measurements in industrial tank environments. Dielectric antennas enable highly directive measurements and allow the application in harsh environments [1]. However, the physical aperture size of the antenna is restricted by the standardized nozzle and flange diameters of(More)
A circular waveguide-fed UWB antenna for the frequency range from 8.5 to 10.5 GHz is presented, incorporating a dielectric insert mounted inside a short metallic excitation horn, yielding a significantly enlarged aperture efficiency compared to the same horn without dielectric insert and even to the theoretical limit of a conical horn antenna of infinite(More)
This contribution deals with channel measurements in multiple-input multiple-output radio-frequency identification systems (MIMO RFID). Herein, multiple antennas are applied at the reader and at the RFID tag as well. A method for the determination of the channel coefficients between all antennas is presented. The channel information is needed to apply MIMO(More)
This paper deals with a systematic evaluation of the antenna impact on the gauging accuracy of industrial radar level measurements for process automation. By this means, a framework is provided by which the antenna parameters of major influence on the gauging accuracy can be identified. Guidelines are given to what extent an improvement of these parameters(More)
This paper concerns dielectric tube antenna design in the frequency range from 8.5 to 10.5 GHz for the use in the field of industrial radar level gauging for process automation industry. The application is based on monostatic radar configurations, which thus demands for highly directive endfire antennas made of chemically inert dielectrics, such as(More)
Recently, the use of multi-antenna techniques in backscatter modulation-based systems, mostly known from the application of RFID, has come into the focus of research due to the increasing demand for higher data rates or the extension of the achievable range or reliability. Thus, this contribution describes a measurement testbed for the investigation of(More)