Search

We present a combination of fractional order calculus and Savitzky-Golay filter for extraction of both electrogastrogram and pulse rate signal from a mixed signal recorded with high sampling frequency (1 kHz). In order to evaluate the proposed method, we generated semi-synthetic biosignal mixture. In order to assess proposed methods, signal-to-noise ratio was calculated for the resulting extracted signals. Obtained results suggest that there are benefits from the combination of Savitzky-Golay filter and fractional order calculus, compared to the application of separate individual application of those methods. Further examination will be performed on in vivo recorded signals.

The comparison of two methods used to separate electrocardiography and electromyography signals: Empirical Mode Decomposition (EMD) and Fractional Order Calculus (FC) is presented. For quantitative evaluation, crest factor (CF) and signal-to-noise ratio (SNR) values were calculated, where higher CF and SNR values were preferable. Results suggest that FC and EMD performance can be partially assessed by CF indicating better artifact cancellation with EMD approach by 9.72%. For FC and EMD, automatic fractional order application and intrinsic mode function selection were suggested and discussed, respectively. In summary, the results suggested that proposed filtering assessment should be enhanced for more appropriate FC and EMD method's assessment.

The paper presents the computer simulation and the measurement results of the realized strip horn antenna intended for operation at 9–15 GHz range. The antenna is fabricated with 20 mm wide and 1 mm thick aluminum strips. The arms of the horn are 60 mm long while the aperture angle is 60. The excitation is performed through the SMA connector pin which is placed at the quarter wavelength distance from the short-circuited strip.

This paper presents electromagnetic simulation software package WIPL-D microwave and design, passive PIN diode limiter for higher RF power in combination of waveguide and print techniques. The Limiter is designed for use at X-range of protection low noise semiconductor amplifiers and includes two spatially separated PIN diodes.

The paper presents simulated and measured results of the UHF RFID antenna realized with dipole matched to a CPS (coplanar stripline) and inductively coupled with small rectangular loop. Such design of the antenna enables easy achieving and controlling high values of the inductive reactance that is necessary for obtaining good matching of antenna to ASIC (Application Specific Integrated Circuit) chip. The antenna is characterized by simple and robust design which results in low-cost realization.