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  • On Nonuniform Sampling of Bandwidth-Limited Signals

    Publication Year: 1956, Page(s):251 - 257
    Cited by:  Papers (299)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (824 KB)

    The purpose of this investigation is to examine four special nonuniform sampling processes in detail, and to deduce some interesting properties of bandwidth-limited signals. The main results are contained in four generalized sampling theorems. These theorems not only contain the nature of determination (unique-specification, over-specification, and underspecification) of signals but also include e... View full abstract»

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  • Stability and Power-Gain Invariants of Linear Twoports

    Publication Year: 1962, Page(s):29 - 32
    Cited by:  Papers (203)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (512 KB)

    It is shown that the stability of a linear twoport is invariant under arbitrary lossless terminations, under interchange of input and output, and under "immittance substitution," a transformation group involving the arbitrary interchanging of impedance and admittance formulations at both ports. The quantityk = frac {2 Re (gamma_{11}) Re (gamma_{22}) - Re(gamma_{12} gamma_{21})} {|gamme_{12} g... View full abstract»

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  • A practical method of designing RC active filters

    Publication Year: 1955, Page(s):74 - 85
    Cited by:  Papers (142)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (936 KB)

    IN THE FREQUENCY range below about 30 cps, the dissipation factors of available inductors are generally too large to permit the practical design of inductance-capacitance (LC) or resistance-inductance-capacitance (RLC) filter networks. The circuits described in the following pages were developed and collected to provide an alternative method of realizing sharp cut-off filters at very low frequenci... View full abstract»

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  • On the Design of Filters by Synthesis

    Publication Year: 1958, Page(s):284 - 327
    Cited by:  Papers (49)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (4333 KB)

    Following an introduction to the methods and significance of filter design, this paper deals with definitions and filter synthesis according to prescribed attenuation requirements. It shows how the characteristic function for cases of practical importance can be calculated, particularly for the special cases 1) where this function is a power term in the frequency variable (maximally flat), 2) wher... View full abstract»

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  • On the Solution of the Equations Obtained from the Investigation of the Linear Distribution of Galvanic Currents

    Publication Year: 1958, Page(s):4 - 7
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (512 KB)

    An English translation is given of Kirchhoff's classic paper: "Ueber die Auflösung der Gleichungen, auf welche man bei der Untersuchung der linearen Vertheilung Galvanischer Ströme geführt wird," Annalen der Physik und Chemie, vol. 72, pp. 497-508, 1847. View full abstract»

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  • Theoretical Limitations on the Broad-Band Matching of Arbitrary Impedances

    Publication Year: 1961, Page(s): 165
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (120 KB)

    First Page of the Article
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  • The Scattering Matrix in Network Theory

    Publication Year: 1956, Page(s):88 - 97
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1192 KB)

    This paper gives an introductory treatment of the concept and uses of scattering methods in network problems. The scattering parameter description for linear networks is defined and the utility of this formalism for problems involving power flow in terminated networks is discussed. Examples of scattering computations for transformer 4-ports, transformerless impedance matching networks and transduc... View full abstract»

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  • Definitions of 'Bandwidth' and 'Time Duration' of Signals Which Are Connected by an Identity

    Publication Year: 1956, Page(s):286 - 288
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (249 KB)

    In this paper we give definitions of "equivalent time duration"Deltatauand "equivalent bandwidth"Delta fand show that they are connected by a simple reciprocal identity. An example is given and it is shown that the same concepts can be applied in antenna theory to give useful definitions of "equivalent aperture distribution width" and "equivalent angular spectrum." View full abstract»

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  • Noise in Negative-Resistance Amplifiers

    Publication Year: 1960, Page(s):166 - 170
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (503 KB)

    Negative-resistance amplifiers that consist of a noisy negative resistance imbedded in a lossless three-terminal-pair linear network to make a two-port amplifier are analyzed. It is shown that Haus and Adler's noise measureM_{e}, is not constrained to lie between two eigenvalues of a noise matrix, as is the case for bona fide two-port amplifiers. Instead, it is always equal to its optim... View full abstract»

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  • Some Extensions of Liapunov's Second Method

    Publication Year: 1960, Page(s):520 - 527
    Cited by:  Papers (369)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1064 KB)

    >In the study of the stability of a system, it is never completely satisfactory to know only that an equilibrium state is asymptotically stable. As a practical matter, it is necessary to have some idea of the size of the perturbations the system can undergo and still return to the equilibrium state. It is never possible to do this by examining only the linear approximation. The effect of the no... View full abstract»

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  • Elementary Applications of the Scattering Formalism in Network Design

    Publication Year: 1956, Page(s):97 - 104
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (832 KB)

    The purpose of this paper is to show the considerable simplification introduced by the scattering formalism in the derivation of many theorems of elementary network theory, and to illustrate how often this concept discloses new aspects of known results, or new connections between apparently unrelated properties. The examples chosen are somewhat unrelated, but they have been selected to emphasize t... View full abstract»

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  • High-Frequency High-Power Operation of Tunnel Diodes

    Publication Year: 1961, Page(s):416 - 425
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1120 KB)

    The operation of oscillators using high-current tunnel diodes above their self-resonant frequency is presented. General stability conditions of the tunnel diode, including external circuits (lumped and distributed), are discussed. Based on a nonlinear analysis of a tunnel-diode oscillator, the power generated by the diode, the power dissipated within the diode and the power delivered to an externa... View full abstract»

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  • Design Principles for Single Loop Transistor Feedback Amplifiers

    Publication Year: 1957, Page(s):145 - 156
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1888 KB)

    The design of single loop transistor feedback amplifiers is considered. A criterion of stability is introduced which is useful for either calculating or measuring the stability margins of transistor amplifiers, and in particular, single loop feedback amplifiers. Expressions are derived for relating sensitivity and impedance to feedback. Practical design techniques are discussed and are illustrated... View full abstract»

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  • Hazards and Delays in Asynchronous Sequential Switching Circuits

    Publication Year: 1959, Page(s):12 - 25
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1808 KB)

    This paper is concerned with asynchronous, sequential switching circuits in which the variables are represented by voltage levels, not by pulses. The effects of arbitrarily located stray delays in such circuits are analyzed, and it is shown that, for a certain class of functions, proper operation can be assured regardless of the presence of stray delays and without the introduction of delay elemen... View full abstract»

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  • Synthesis of a Class of Strip-Line Filters

    Publication Year: 1958, Page(s):104 - 109
    Cited by:  Papers (80)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (624 KB)

    This paper describes a design theory for a class of strip-line filters on an insertion loss basis. The important part of the paper is the equivalent transformations showing the close correspondence between lumped and coupled-line distributed parameter circuits. An introduction is provided for clarification. Line type, low-pass ladder, high-pass ladder, and band-pass ladder type filters are realize... View full abstract»

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  • Kirchhoff's 'Third and Fourth Laws'

    Publication Year: 1958, Page(s):8 - 30
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2816 KB)

    The epoch-marking publication of Kirchhoff in 1847 is considered in this paper. The rule given by Kirchhoff deserves to be understood by almost all engineers, for it shows how to determine in a simple and straightforward way the system functions of any passive network that contains no transformers. Preliminary to the consideration of the rule and its dual, the basic concepts of combinatorial topol... View full abstract»

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  • Some Topological Considerations in Network Theory

    Publication Year: 1958, Page(s):30 - 42
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1544 KB)

    Elements of the theory of linear graphs which are readily applicable to communication theories are reviewed. These concepts are used to examine the geometrical significance of Kirchhoff's laws. Topological rules are discussed and illustrated which aid not only in formulating solutions for the resistive networks considered by Kirchhoff but also apply to RLC networks, switching networks, and probabi... View full abstract»

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  • Equivalent Distributed RC Networks of Transmission Lines

    Publication Year: 1962, Page(s):247 - 251
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (470 KB)

    There are any number of pairs of resistance and capacitance density functions, i.e.,r(x)andc(x), which can provide the same electrical performance as a given distributed RC laddernetwork. In general these equivalent networks will have different lengths. A criterion for equivalence of density functions is expressed in the following: Networks with the samertoc View full abstract»

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  • Wave Representation of Amplifier Noise

    Publication Year: 1962, Page(s):84 - 86
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (416 KB)

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  • Bounded Real Scattering Matrices and the Foundations of Linear Passive Network Theory

    Publication Year: 1959, Page(s):102 - 124
    Cited by:  Papers (108)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2312 KB)

    In this paper the most general linear, passive, time-invariantn-port (e.g., networks which may be both distributed and non-reciprocal) is studied from an axiomatic point of view, and a completely rigorous theory is constructed by the systematic use of theorems of Bochner and Wiener. Ann-portPhiis defined to be an operator inH_n, the space of alln View full abstract»

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  • Flow-Graph Solutions of Linear Algebraic Equations

    Publication Year: 1959, Page(s):170 - 187
    Cited by:  Papers (91)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1848 KB)

    A weighted, oriented topological structure, denoted byGand called a flow graph, is associated with a set ofmequations innvariables, denoted byKX = 0, such thatKis a connection matrix andXa vertex weight matrix of the associated graph. This same set of equations can be written asA_{-v:}^{-} C(A+)'X = 0whereA_{-}^{-v:}... View full abstract»

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  • Q Factors of a Transmission Line Cavity

    Publication Year: 1957, Page(s):3 - 5
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (279 KB)

    On investigating the properties of a transmission line cavity, new expressions for theQfactor and logarithmic decrementdeltawere derived, and were compared with the expressions for a single shunt or series LCR circuit. It was expected that the expressions forQand{pi}/{delta}would be very similar, if not the same, as is the case with LCR circuits. That th... View full abstract»

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  • Synthesis of Tchebycheff Impedance-Matching Networks, Filters, and Interstages

    Publication Year: 1956, Page(s):163 - 172
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1061 KB)

    Work of R. M. Fano on the theoretical limitations of broad-band impedance-matching is utilized to give a straightforward procedure for synthesis of optimum, lossless, Tchebycheff, wide-band impedance-matching networks for various classes of loads. The loads which are treated consist of an inductance, capacitance, and a resistance (all of arbitrary size) connected in series, parallel, or any of a v... View full abstract»

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  • Minimum-Phase Transfer-Function Synthesis

    Publication Year: 1953, Page(s):133 - 137
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (414 KB)

    This paper presents a means for realizing a minimum-phase transfer-functionH(p)to within a constant multiplier, provided thatH(p)has no poles on thej omega-axis including infinity. The network is in ladder form, without coupled coils, and every coil has an associated series resistance ifH(j omega) neq 0for any finiteomegaSynthesis is illustrat... View full abstract»

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  • Systems Analysis of Discrete Markov Processes

    Publication Year: 1956, Page(s):257 - 266
    Cited by:  Papers (47)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1161 KB)

    The properties of discrete Markov processes are related to those of analogous linear, time-invariant, sampled-data systems. Methods are given for the systems-analysis solution and interpretation of problems and theorems relating to such Markov processes. Correlation functions of signals generated by Markov processes are determined. Transform procedures, flow graphs, and signal-flow ideas play an i... View full abstract»

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  • Approximation Theory for Filter-Networks

    Publication Year: 1961, Page(s):341 - 356
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1488 KB)

    This paper presents a general design theory for filter-networks constructed on the basis of theory of the Abelian Integral. An ideal transmission function is defined to be an Anbelian Integralw(lambda)with the following properties: 1)Re w(lambda) = u(lambda) = A_kin given regionsB_k, 2){u(lambda) - log | lambda + a_i|}is regular at any given pointa_... View full abstract»

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  • Instability in Two-Port Active Networks

    Publication Year: 1958, Page(s):133 - 139
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (746 KB)

    The general bilateral, two-port active network, defined by itsy, h, z, orgparameters, is treated for arbitrary terminations and external feedback with and without transformers. Stability considerations necessary for amplifier design are first discussed. These considerations are then extended to the design of instability, and the concept of maximum potential instability with e... View full abstract»

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  • Nonlinear control systems with random inputs

    Publication Year: 1954, Page(s):9 - 18
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (643 KB)

    The describing-function method for the analysis of nonlinear systems with sinusoidal inputs is interpreted as a mean-square quasi-linearization technique and is generalized to apply to random signals. An amplitude-sensitive (or zero-memory) nonlinearity is interpreted as being approximately equivalent to a linear frequency-insensitive device, and a formula is derived for its equivalent gain. A sim... View full abstract»

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  • Converse of the Star-Mesh Transformation

    Publication Year: 1961, Page(s):491 - 493
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (336 KB)

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  • Optimum Design of the Shunt-Series Feedback Pair with a Maximally Flat Magnitude Response

    Publication Year: 1961, Page(s):448 - 453
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (520 KB)

    In this paper, analysis and design of the shunt-series pair feedback amplifier are given. The design achieves optimum gain-bandwidth product with a maximally flat magnitude transmission for a specified gain or desensitivity. Phantom zero is used to avoid degradation of feedback bandwidth and to obtain a filter type transient response. Experimental verification of the theory is given with a medium ... View full abstract»

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  • Positive Real Functions of Several Variables and Their Applications to Variable Networks

    Publication Year: 1960, Page(s):251 - 260
    Cited by:  Papers (57)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (984 KB)

    This paper is concerned with networks containing variable parameters. The concepts of multivariable positive real function, multivariable reactance function, and multivariable positive real matrix are introduced, and it is shown that these concepts are useful for dealing with a wide class of variable parameter networks. Several theorems on these functions are established. Extensions of several con... View full abstract»

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  • Normalized Design of 90° Phase-Difference Networks

    Publication Year: 1960, Page(s):128 - 136
    Cited by:  Papers (41)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (776 KB)

    The theoretical background exists for the design of 90° phase-difference networks. Continued interest in the design of such wide-band networks for single-sideband and other applications indicates the need for methods to ease the computational difficulties inherent in network design involving elliptic functions. Concise design data are given in the form of equations, curves and tables which si... View full abstract»

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  • The Representation of Signals

    Publication Year: 1959, Page(s):197 - 216
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1704 KB)

    A conceptually clear and computationally simple method of representing complicated signals is described. A signal of high time-bandwidth product is represented as the sum of a collection of simple elementary signals. As in the work of Gabor, these elementary signals are spaced at equal intervals in "time" and "frequency." It is shown that any convenient elementary signal may be used as the basis f... View full abstract»

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  • On the Classification of Boolean Functions

    Publication Year: 1959, Page(s):176 - 186
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (688 KB)

    Two Boolean functions which differ only by permutation and complementation of theirninput variables belong to the same symmetry class. Methods are described for determining the number of symmetry classes for functions ofnvariables, and for ascertaining whether or not two functions belong to the same class. This classification is achieved via a complete set of invariants, char... View full abstract»

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  • Graph Theory and Electric Networks

    Publication Year: 1959, Page(s):95 - 109
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1400 KB)

    In this discussion, we mention the following topics concerning electric networks in graph theoretic terms: Kirch. hoff's Laws, mesh and node equations, and matrix tree theorem; flow problems and Menger's theorem; boolean functions and enumeration and synthesis problems; information theory and Markov chains; cut sets and incidence matrices; the "crummy relay" results of Moore and Shannon; and the t... View full abstract»

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  • Matrix Analysis of Oscillators and Transistor Applications

    Publication Year: 1958, Page(s):181 - 188
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (672 KB)

    The use of matrix techniques leads to the classification of feedback, harmonic oscillators into four basic types. The oscillator is considered to be made up of two two-port networks: one contains the active element; the other, the feedback network. The equations for oscillation are expressed in terms of the two-port parameters. The method is applied specifically to the Hartley and Colpitts oscilla... View full abstract»

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  • Survey of Some Properties of Linear Networks

    Publication Year: 1957, Page(s):70 - 78
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (877 KB)

    An attempt is made to give a brief exposé of some modern works on linear network properties. The concepts treated are the following: passivity, stability, efficiency, and nonreciprocity;n-terminal-pair networks and two-terminal-pair networks in particular are studied at a fixed frequency. View full abstract»

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  • RC Active Networks Using Current Inversion Type Negative Impedance Converters

    Publication Year: 1957, Page(s):140 - 144
    Cited by:  Papers (57)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (400 KB)

    The RC active filter, which has been established by J. G. Linvill, has a circuit configuration of a negative impedance converter sandwiched between two RC networks. This paper deals with a new circuit also using two RC networks and a converter, but its configuration is based on the parallel or series connection and the converter must be a current-inversion type. The main results obtained here are ... View full abstract»

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  • Negative-Impedance Converters

    Publication Year: 1957, Page(s):124 - 131
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (856 KB)

    The conditions under which an active device exhibits an input impedance at one terminal pair which is exactly the negative of the load impedance connected to the other terminal pair are discussed. There are an infinite number of ways by which such a device, which is called a negative-impedance converter (NIC), can be made. One of the limits of this set is represented by a transistor circuit which ... View full abstract»

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  • A Study of Rough Amplitude Quantization by Means of Nyquist Sampling Theory

    Publication Year: 1956, Page(s):266 - 276
    Cited by:  Papers (141)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1288 KB)

    Quantization is an operation that takes place when a physical quantity is represented numerically. It is the assignment of an integral value to a physical quantity corresponding to the nearest number of units contained in it. Quantization is like "sampling-in-amplitude," which should be distinguished from the usual "sampling-in-time." The probability density distribution of the signal is sampled i... View full abstract»

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  • Four-Dimensional Transformations of 4-Pole Matrices with Applications to the Synthesis of Reactance 4-Poles

    Publication Year: 1956, Page(s):105 - 111
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (840 KB)

    The various matrices (impedance, admittance, chain, scattering) commonly used in 4-pole theory are shown to originate from 4-dimensional transformations on the vector formed by the input and output voltages and currents. Several particular transformations are studied and lead naturally to a matrix (the transfer matrix) already introduced by Bauer, Dicke, and Watson. This is applied to the synthesi... View full abstract»

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  • Electric Network Representation of Transistors-A Survey

    Publication Year: 1956, Page(s):5 - 21
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2432 KB)

    In this survey paper the various methods used to describe the electric-circuit properties of a transistor are reviewed. After a brief introduction and discussion of the low-frequency characterization of transistors and of the representation used for point-contact transistors, the remainder of the paper is devoted to the subject of high-frequency representation for junction transistors. The more po... View full abstract»

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  • Topics in the Design of Insertion Loss Filters

    Publication Year: 1955, Page(s):337 - 346
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1152 KB)

    This paper combines the theory of scattering matrices and the design of filters on an insertion loss basis. It is not intended to add substantially new results. Its purposes are to simplify the presentation of the insertion-loss theory, with the help of the scattering parameters, and to study a number of particular cases serving as a guide in practical design and as a starting point of approximate... View full abstract»

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  • Weighted Least-Squares Smoothing Filters

    Publication Year: 1953, Page(s):197 - 203
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (723 KB)

    This paper differs from many others on least square filtering, in that no explicit note has been taken of the noise spectrum, at least no more than is taken when one fits a curve of least squares to a set of data. The concept of a least weighted error, not new in curve fitting, has, to the author's knowledge, never before been applied to a filter-- other workers have uniformly weighted their signa... View full abstract»

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  • A Matrix Method for the Design of Relay Circuits

    Publication Year: 1955, Page(s):154 - 161
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (696 KB)

    This paper reviews the matrix method of synthesis of combinational multiple-output relay circuits first given in reference[4] p. 154 Further examples are provided and it is shown how the method may be applied to sequential circuits as well. The purpose of presenting this material in the present connection is to illustrate the use of unconventional techniques with unconventional types of matrixes i... View full abstract»

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  • A Survey of Network Realization Techniques

    Publication Year: 1955, Page(s):291 - 297
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (904 KB)

    This paper is a brief survey of network realization techniques, from a general point of view. By realization techniques is meant methods of finding explicit networks (configurations and element values) from prescribed characteristics (such as impedance functions) which can be realized exactly. The statement of conditions under which prescribed characteristics are realizable is included in the defi... View full abstract»

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  • Synthesis of Transmission-Line Networks and the Design of UHF Filters

    Publication Year: 1955, Page(s):325 - 336
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1104 KB)

    Recently, Richards proved the remarkable fact that the synthesis of networks consisting of resistors and lossless transmission-lines with finite electrical length may be treated exactly the same way as in the case of conventional linear passive networks. This paper offers a new synthesis of this kind without mutual induction and its application to the design of uhf filters having Tchebyscheff char... View full abstract»

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  • Application of Scattering Matrices to the Synthesis of n Ports

    Publication Year: 1956, Page(s):111 - 120
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (961 KB)

    Scattering matrices are applied to the synthesis of finite passiven-ports (n-terminal pair networks) with frequency dependence. A realizability theorem for scattering matrices is shown and ann-port is synthesized as a nondissipative network terminated in resistances. By considering the various numbers of resistance terminations and introducing the notion of general... View full abstract»

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  • On the Identification Problem

    Publication Year: 1956, Page(s):277 - 281
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (554 KB)

    The identification problem involves the determination of the identity of a black box from the observation of its responses to a set of input signals. In this paper attention is focused on the identification of zero-memory multipoles and two-poles of classn_1. The test signals are sine waves of different amplitudes and frequencies, and the measured quanity is the describing function of t... View full abstract»

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  • Design of Unsymmetrical Band-Pass Filters

    Publication Year: 1957, Page(s):33 - 40
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (904 KB)

    The paper presents a new approach to the synthesis of band-pass filters, in particular of filters with electrical characteristics which are not symmetrical with respect to their center frequency when plotted on an arithmetic frequency scale. The synthesis proceeds in three steps: approximation, representation by means of fictitious network elements in the low-pass domain, and subsequent low-pass, ... View full abstract»

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