This paper presents a developed compact lowpass filter which is devised by concatenating ‘T’ and inverted ‘T’ open stubs on a microstrip line. They are combined to enhance the bandwidth and also to improve the outband performance. Insertion loss of the developed filter is less than -0.15 dB and the return loss is -30 dB at 2.85 GHz. Stopband performance of the filter is less than -20 dB from 5....

This article presents a configuration that can simulate both resistor in series with frequency-dependent negative-resistance (R-D) and capacitor (R-C), different selection of passive elements. The proposed circuit employs only two current-controlled-current-feedback- amplifiers (CC-CFAs) grounded does not require element matching, the simulated equivalent values be tuned electronically by apply...

Surface multiresolution processing is an important subject in CAGD. It also poses many challenging problems including the design of multiresolution algorithms. Unlike images which are in general sampled on a regular square or hexagonal lattice, the meshes in surfaces processing could have an arbitrary topology, namely, they consist of not only regular vertices but also extraordinary vertices, w...

Motivated both by digital filter design and polynomial-based matrix iteration methods, we study Green’s function for the complement of a union of disjoint closed intervals. The key tool is the Schwarz–Christoffel map. Asymptotic analysis produces simple and useful leading terms for Green’s function and the associated equilibrium distribution. Our results are applied to optimal lowpass filters a...

In this paper, we set forth a new family of regularizing filters based on the magnitude response function of Chebyshev-I lowpass filter. The corresponding regularization strategies for inverse problem are constructed. The optimum asymptotic order of the regularized solution is obtained by a priori choice of the regularization parameter. Finally, numerical results are given to demonstrate the ef...

Abstract –In many measurement applications, it is required to have digital-to-analog converters (DAC). All DACs use a reconstruction (anti-imaging) filter as the final step in the conversion process. Without this filter, generating a continuousamplitude signal would not be possible. This paper presents a new theoretical concept of a post-DAC continuous-time filter. The proposed filter was desig...