The characteristics of dielectric backed planar conducting layers of arbitrarily shaped in a rectangular waveguide are calculated by means of coupled integral equation technique (CIET) which accurately takes higher order mode interactions. Equivalent structures for the accurate analysis whole structure are introduced in which magnetic surface currents are identified as the unknowns at the apert...

In the next section, in a short, the basic propThe frequency response of a high-Q seconderties of the mode 1 are summarized. The proporder ̄lter section is 2Q times more sensitive erties of elliptic-function ̄lters with poles on a to the variations in pole-frequency than it is to circle are presented in the third section. Modivariations in Q-factors. All useful biquad cir̄cations of the mode 1 are...

Abstract: Time-domain testing of A/D converter in single tone mode amounts to the identification of fundamental and harmonic tones in noise. The variable projection method reduces this problem to frequency estimation by minimising a onedimensional function. In this paper it is shown that the bias due to ignoring the harmonic distortion effect is negligible, and this approximation leads to fast ...

Transmission line theory and a genetic algorithm are used herein for extracting per-unitlength parameters of microstrip or striplines with dispersive dielectric substrates. S-parameters of the line section are measured and used as an objective function for global optimization. The discrepancy between the modeled and measured results is minimized over all the frequency range of interest. Wave eq...

Abstmet-This paper introduces a frequency-weighted frequency-weighted balanced reduction method controller reduction scheme which offcrs good closed-loop (Enns, 1984a, b) and the idea of representing a stability under use of the reduced order controller. By combining the use of a stable fractional representation of the controller as a stable coprime factorization (Liu controller with a frequenc...

To achieve high bit rate in transmission over wireless channels frequency reuse is an encouraging concept . Rather than dividing allocated frequency spectrum into narrow band width channels , one for each user information is transmitted over a very wide frequency spectrum using the same carrier frequency within same frequency band . In this paper we propose code division multiplexing scheme in ...

This paper investigates the bending vibration of rotating single-walled carbon nanotubes (SWCNTs) based on nonlocal theory. To this end, the rotating SWCNTs system modeled as a beam with a circular cross section and the Euler-Bernoulli beam theory (EBT) is applied with added effects such as rotary inertia, gyroscopic effect and rotor mass unbalance. Using nonlocal theory, two coupled sixth orde...