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------------_.- - - - - - -- - - - -------------------<br />

Subject Index 487<br />

L·sections. 302<br />

resonators, 295, 297<br />

stopband selectivity, 297<br />

Divide by zero. 8. 74<br />

Droop parameter;<br />

definition. 310<br />

maximum, 310, 313<br />

Dummy:<br />

branch elements. 77<br />

load, 24, 57<br />

Edge~collpJed filters, 343<br />

Efficiency;<br />

circle, 264<br />

definition, 92<br />

<strong>of</strong> direct-coupled filters, 295<br />

loci <strong>of</strong> constant, 253<br />

maximum, 250, 264, 374, 377<br />

resonator, 295<br />

from scattering parameters, 263<br />

Eigenvalue;<br />

definition, 122<br />

example, 132, 168<br />

Eigenvector:<br />

in ellipsoid, J22<br />

in orthogonal matrix. 132<br />

Electromagnetic modes. extraneous, 336<br />

Element:<br />

commensurate, 336<br />

negative, 284. 351, 361<br />

subroutines, 73<br />

type numbers, 72<br />

units, 73<br />

unsealed value <strong>of</strong>, 78<br />

Ellipse:<br />

rotation, 120<br />

translation, J20<br />

Elliptic filter:<br />

input impedance relationships, 353<br />

permutation algorithm. 354. 357<br />

precision teslS. 360<br />

selectivity family, 345<br />

selectivity function, 346<br />

types, 350<br />

Elliptic integral, 348<br />

Equalization. time delay. 152,219<br />

Equal~stub admittance filters. 336<br />

Equations:<br />

comp1e:\ linear. 11<br />

matrix. 9,11. 27, 31<br />

nonlinear simultaneous, 26<br />

real linear, 9. 59<br />

Equipment costs, 1<br />

Error:<br />

integral' function, 150<br />

least pth. 114<br />

minimum. 27<br />

overflow. 159<br />

round-<strong>of</strong>f. 348<br />

Simpson's rule, 18<br />

surface, 36, 115<br />

trapezoidal rule, 15<br />

Evaluation:<br />

<strong>of</strong> partial derivatives, 39. 40<br />

<strong>of</strong> polynomials with complex<br />

coefficients, 39. 40. 43<br />

Extrapolation:<br />

linear, 15<br />

Richardson, 16, 153, 165<br />

Romberg, 16<br />

slope, 139, 141<br />

Feedback, transistor, 78, 241<br />

Feldkeller energy equation, 47<br />

Filter, invulnerable:<br />

bridged-To 377<br />

definition, 377<br />

three-pole, 380<br />

Finite differences, 223<br />

Flag, 73, 82, 155<br />

Fletcher-Powell search, 134<br />

Fletcher-Reeves search, 134, 136,450<br />

Fourier integral;<br />

fast transform, lOt<br />

graphic interpretation, 99<br />

for real causal functions, 98<br />

frequency, fractional. 287<br />

Function:<br />

analytic. 35<br />

barrier. 163, 169<br />

bilinear, 232, 242<br />

Butterworth, 308<br />

characteristic. 48, 50, 55<br />

Chebyshev. 305<br />

composite bilinear, 240<br />

compound, for constraints. 165<br />

cross terms in, 121, 131. 133<br />

cubic, in extrapolation, 140<br />

curved valley, 146<br />

discontinuous, 144. 152<br />

error, 26. 36<br />

even. 23, 24. 26, 47. 48, 51<br />

Fano. 310<br />

fitting, 140, 152<br />

global minimum. 135<br />

impulse, 62<br />

inflection point. JJ9<br />

input impedance. 58. 82<br />

mapping. 133<br />

maximum, 115<br />

minimum. 119, 120<br />

bounded, 140<br />

minimum phase, 222<br />

objective. 116, 145. lSI<br />

odd, 23, 26, 47, 48, 51<br />

piecewise linear. 219, 226

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