In this paper, a novel technique for the design of two-channel Quadrature Mirror Filter (QMF) banks with linear phase in frequency domain is presented. To satisfy the exact reconstruction condition of the filter bank, low-pass prototype filter response in pass-band, transition band and stop band is optimized using unconstrained indirect update optimization method. The objective function is form...

the harmonic in distribution systems becomes an important problem due to an increase in nonlinear loads. this paper presents a new approach based on a graph algorithm for optimum placement of passive harmonic filters in a multi-bus system, which suffers from harmonic current sources. the objective of this paper is to minimize the network loss, the cost of the filter and the total harmonic disto...

ACOUSTIC WAVES MEASUREMENTS ON SNGS CRYSTALS AND DETERMINATION OF MATERIAL CONSTANTS E. CHILLA*1, R. KUNZE2, A. SOTNIKOV2, M. WEIHNACHT2, J. BOHM3, R. B. HEIMANN4, M. HENGST4, and U. STRAUBE5, 1VI Tele Filter GmbH, Teltow, Germany, 2Leibniz Institute for Solid State and Materials Research, Dresden, Germany, 3Institute for Crystal Growth, Berlin, Germany, 4Freiberg University of Mining and Techn...

this paper presents a novel control approach used in shunt active power filter based on variable structure control combined with random pwm technique (rvsc) that provides robust, fast, and more favorable performance for active power filter. this control strategy is compared with two other strategies to show the effectiveness of the introduced methods; pulse width modulated proportional-integral...

This paper presents a low loss and high selective lowpass filter which is implemented using suspended stripline (SSL) technology. The proposed structure is comprised of a 13th order generalized Chebyshev lowpass filter which enjoys integrated waveguide-to-SSL transitions. This filter is designed and fabricated to be used as lowpass channel of a U-band diplexer employed in frontend of a U-band d...