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Rapid coupling matrix reduction for longitudinal and cascaded-quadruplet microwave filters

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2 Author(s)
Gajaweera, R.N. ; Dept. of Electron. Syst. Eng., Univ. of Essex, UK ; Lind, Larry F.

To realize standard microwave filter structures, it is necessary to zero some of the elements in a general even-mode coupling matrix. The zeroing process involves solving a nonlinear set of equations, performed here by using the Newton-Raphson method. Thus, intelligence is added to the numerical iteration procedure, to ensure rapid convergence. The reproduced transmission coefficient S21 from the reduced matrix agrees well with the one synthesized.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:51 ,  Issue: 5 )