Learn More
In this paper, a high precision 80 GHz radar distance measurement system is presented. It is based on an ultra-wideband SiGe monostatic transceiver chip, which enables a bandwidth of 25.6 GHz around a center frequency of 80 GHz (i.e. 32%). All components besides the silicon radar chip are off-the-shelf electronics, which makes the sensor well-suited for(More)
In production and automation engineering the need for highest precision distance sensors is ubiquitous especially in the field of micro-machining processes where an extremely accurate positioning is indispensable. Although the work pieces become smaller and smaller many machine tools stay big and heavy. The reason for this is that a high precision is(More)
High-accuracy measurement systems are in high demand for industrial applications. Especially in machine tools, range measurement options close to the stage position are required. The main challenge of the measurement technique is the integration into the machine tool concept. In this paper, a novel measurement principle based on radar and on guided waves is(More)
This paper presents the design and realization of a microwave applicator at 2.45 GHz for the synthesis of gold nanoparticles. The particles are dissolved in N,N-dimethylformamide (DMF). The heating rate is approximately 8 K/s to achieve a short crystallization time. For a proper applicator design it is necessary to know the dielectric properties of DMF.(More)
The present paper is focused on the minimization of return loss of a slotted coaxial radiator proposed for a decontamination system for soils contaminated by volatile or semi-volatile organic compounds such as oils or fuels. The antenna upgrade is achieved by coating it with a 5 mm thick Teflon layer. The electromagnetic characteristics reflection(More)
Industrial applications for frequency modulated continuous wave (FMCW) radar systems often require the separation of close targets, which is limited by the available distance resolution of the radar. In general, for the evaluation of FMCW radar signals a fast Fourier transformation (FFT) based method is used. However, the FFT inherently limits the available(More)
One of the main disturbances in a frequency-modulated continuous wave radar system for range measurement is nonlinearity in the frequency ramp. The intermediate frequency (IF) signal and consequently the target range accuracy are dependent on the type of the nonlinearity present in the frequency ramp. Moreover, the type of frequency ramp nonlinearity cannot(More)
The demand for high accuracy radar systems is continuously growing, especially in automation industry. Most of these systems are based on the distance measurement for single target and in many cases the measurement system consists of a guided wave structure, e.g. rectangular or cylindrical waveguides. However, in reality the resulting measurement results(More)