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Proceedings of the Institute of Radio Engineers

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  • Simple Inductance Formulas for Radio Coils

    Publication Year: 1928, Page(s):1398 - 1400
    Cited by:  Papers (98)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

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  • A New High Efficiency Power Amplifier for Modulated Waves

    Publication Year: 1936, Page(s):1163 - 1182
    Cited by:  Papers (422)  |  Patents (48)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2320 KB)

    This paper introduces a new form of linear power amplifier for modulated radio-frequency waves. Plate circuit efficiencies of sixty to sixty-five per cent independent of modulation are obtained by means of the combined action of varying load distribution among the tubes and varying circuit impedance over the modulation cycle. The theory of operation is developed and detailed observations on the be... View full abstract»

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  • High Power Outphasing Modulation

    Publication Year: 1935, Page(s):1370 - 1392
    Cited by:  Papers (262)  |  Patents (99)
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  • The audion-detector and amplifier

    Publication Year: 1914, Page(s):15 - 29
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2622 KB)

    Notwithstanding the now wide-spread use of the Audion as a detector in radio telegraph and telephone service few accounts of independent research into the nature of this instrument, or even cursory descriptions of its operation, seem to have been recorded, since the original paper presented before the American Institute of Electrical Engineers in 1906. At that time, pending patent applications pre... View full abstract»

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  • A New Principle in Directional Antenna Design

    Publication Year: 1938, Page(s):333 - 345
    Cited by:  Papers (94)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1408 KB)

    It is shown that in certain types of directional antenna arrays the gain can be increased by arranging so that waves going from the array elements in the direction of maximum transmission are not strictly in phase at large distances. Three examples are given, an end-fire array and two antennas designed to radiate, as far as possible, only in a horizontal plane. In the case of the end-fire array it... View full abstract»

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  • The Basic Principles of Super-Regenerative Reception

    Publication Year: 1938, Page(s):76 - 106
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4776 KB)

    By means of cathode-ray oscillograms and mathematical analyses the principal phenomena occurring in superregenerative receivers are explained. The results verify an earlier theory that in the separately quenched detector the received signal merely causes the detector to oscillate at maximum output for a longer period during each quench cycle, without increasing the maximum amplitude of the oscilla... View full abstract»

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  • The Interdependence of Frequency Variation and Harmonic Content, and the Problem of Constant-Frequency Oscillators

    Publication Year: 1933, Page(s):958 - 981
    Cited by:  Papers (52)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1568 KB)

    The investigations of the frequency variations in oscillating systems with negative nonlinear resistance were based until now on the fundamental differential equation of the simple oscillatory circuit. This method, although very exact, is not always sufficiently simple and even not always possible, especially if it concerns more complicated schemes. The symbolic calculus, although very simple in u... View full abstract»

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  • Some Recent Developments of Regenerative Circuits

    Publication Year: 1922, Page(s):244 - 260
    Cited by:  Papers (92)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3384 KB)

    A system of circuits is described whereby the effective resistance of a regenerative circuit is periodically made positive and negative, tho predominantly positive. Such a circuit will respond to impressed electromotive forces by setting up free oscillations during the negative resistance period, which oscillations are proportional to the exciting emf. The forced oscillations produced by the excit... View full abstract»

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  • Circuit Relations in Radiating Systems and Applications to Antenna Problems

    Publication Year: 1932, Page(s):1004 - 1041
    Cited by:  Papers (144)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2744 KB)

    Expressions for the self and mutual impedances within a radiating system are developed by the use of the generalized reciprocity theorem. These expressions are given in terms of the distributions of the electric field intensities along the radiators. A method for the determination of the field intensities is outlined. Formulas for the self and mutual impedances in several types of directional ante... View full abstract»

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  • The Theory and Design of Radio-Telegraphic Transformers

    Publication Year: 1916, Page(s):157 - 200
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8688 KB)

    Starting with the general solution of the differential equation of the circuit and a steady sparking state, expressions for input, output, currents, and condenser charge are calculated by means of the boundary conditions of the interval. The boundary conditions are continuity of currents at sparking and a residual condenser charge experimentally determined. Calculated current and voltage waves for... View full abstract»

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  • Recent Standard Radio Sets

    Publication Year: 1916, Page(s):313 - 336
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5816 KB)

    The most recent standard 2-kilowatt and 2-kilowatt (transformer input) sets of the Marconi Company are described fully. Details are given of the design of the switchboards, gaps, condensers, radiation thermo ammeter, motor generator, transformer, automatic starter, overload relay, low power switch, wave changer, and receiver. The adjustment of these sets is carefully considered. View full abstract»

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  • The Calculation of the Inductance of Single-Layer Coils and Spirals Wound with Wire of Large Cross Section

    Publication Year: 1929, Page(s):2053 - 2063
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1216 KB)

    Formulas are given for both wires of round cross section and wires of rectangular cross section. These are obtained by an extension of the Rosa Method. Tables are given from which the geometric mean distances of rectangles which enter in the formulas may be readily obtained. View full abstract»

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  • Amplitude, Phase, and Frequency Modulation

    Publication Year: 1931, Page(s):2145 - 2176
    Cited by:  Papers (29)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2640 KB)

    This paper presents a comparative theoretical study of amplitude, phase, and frequency modulation. In the first part, the fundamental mathematical expressions for the three types of modulation are derived. They are expressed in three different forms: as amplitude equations, side band equations and modulation vector equations. The amplitude equations indicate the envelope of the radio-frequency dir... View full abstract»

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  • The Piezo-Electric Resonator and Its Equivalent Network

    Publication Year: 1928, Page(s):742 - 764
    Cited by:  Papers (44)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2472 KB)

    The theory of the piezo-electric and the mechanical behavior of a quartz resonator is stated following Voight and Cady. The functions of the quartz as dielectric and as vibrator are shown to be separable and replaceable by a condenser in parallel with an electrical resonator, i.e., a series chain of inductance, resistance, and capacity. For a Curie-cut quartz rod excited lengthwise through the tra... View full abstract»

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  • Notes on the Theory of Modulation

    Publication Year: 1922, Page(s):57 - 64
    Cited by:  Papers (106)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The transmission system of "frequency modulation" (transmission by variation of the frequency of the radiated wave) is mathematically analyzed, and the width of the band of frequencies occupied by this method of transmission at a given speed is compared with the width of the corresponding band for transmission by amplitude variation. It is proved that the frequency modulation system using a spacin... View full abstract»

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  • The Nonlinear Theory of Electric Oscillations

    Publication Year: 1934, Page(s):1051 - 1086
    Cited by:  Papers (231)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2811 KB)

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  • An Analysis of Regenerative Amplification

    Publication Year: 1925, Page(s):709 - 753
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5568 KB)

    This paper shows some of the defects of present theories regarding regeneration and presents a new method of analysis based on the idea of a power balance. It is shown that a signal voltage does not supply power to a regenerated circuit but merely prevents certain losses from occurring. This upsets the balance between power input from the tickler and power lost in the circuit, so that oscillation ... View full abstract»

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  • Beam Transmission of Ultra Short Waves

    Publication Year: 1928, Page(s):715 - 740
    Cited by:  Papers (128)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4496 KB)

    Part I of this paper is devoted to a description of various experiments performed at wavelengths below 200 cm. Curves are given to show the effect of the earth and various types of inductively excited antennas called "wave directors." Part I is concluded with a discussion of beam and horizontally polarized radiation. Part II is devoted chiefly to the magnetron tubes used for the production of very... View full abstract»

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  • Tables for the Calculation of the Mutual Inductance of Any Two Coaxial Single-Layer Coils

    Publication Year: 1933, Page(s):1039 - 1049
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    Absolute formulas for the calculation of the mutual inductance of coaxial solenoids, although they are required for work of the great precision necessary in absolute measurements, are not convenient for routine calculations. Series formulas, although simpler, are limited in the range of their convergence, thus requiring the choice of the proper formula for any given problem. The tables and formula... View full abstract»

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  • The Propagation of Radio Waves over the Surface of the Earth and in the Upper Atmosphere

    Publication Year: 1937, Page(s):1203 - 1236
    Cited by:  Papers (180)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3960 KB)

    Completely general formulas are given for computing at any point above a plane earth of finite conductivity the vector electric field for a source which may be a combination of vertical and horizontal electric dipoles or a loop antenna with its axis parallel or perpendicular to the earth. As illustrations of the above general methods, formulas are derived for the ground-wave radiation from (1) a g... View full abstract»

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  • Theoretical Limitations of Cathode-Ray Tubes

    Publication Year: 1937, Page(s):977 - 991
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1528 KB)

    The current density in a focused beam of cathode rays is shown to have an upper limit defined by I = I0(Ee/kT+1) sin2φ, where I is the maximum current density obtainable in the focused spot, I0is the current density at the cathode, E is the voltage at the focus relative to the cathode, T is the absolute temperature of the cathode, e is the electronic charge, k... View full abstract»

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  • A Method of Designing Simulative Networks

    Publication Year: 1938, Page(s):877 - 891
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1296 KB)

    In communication work it is often necessary to design a simple lumped network, the impedance of which approximates at all frequencies that of a certain distributed circuit, such as a transmission line. The present treatment includes a clarified method of making such a design. Former design methods have the common fault that negative circuit constants may be called for. This paper presents a simple... View full abstract»

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  • On the Phenomena in Resonance Transformer Circuits

    Publication Year: 1917, Page(s):433 - 446
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    After reviewing some of the previous work in connection with the superposition of the recurrent transients of regular spark discharge of a condenser, the author develops the solutions for the cases of one and two sparks per cycle. The solutions are then studied in detail with particular reference to the possibility of operating such transformer systems at the absolute resonance point, a possibilit... View full abstract»

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  • Note on Radio-Frequency Transformer Theory

    Publication Year: 1928, Page(s):1194 - 1202
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    In the mathematical analysis for radio-frequency amplifiers employing tuned transformer coupling, the effect of the distributed capacitive coupling. existing between the transformer windings has heretofore been neglected. General equations including this effect are here developed. It is shown that with these equations a closer agreement between computed and experimental results can be obtained. Th... View full abstract»

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  • Some Characteristics of the Frequency Doubler as Applied to Radio Transmission

    Publication Year: 1920, Page(s):493 - 508
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2480 KB)

    A general analysis is given of the theory of the ferromagnetic frequency doubler. The production of secondary circuit energy is secured either by the induction of a sinusoidal secondary emf. or by the production of a sharply peaked, "impulsive" secondary emf. In each case, secondary resonance is employed to emphasize the desired double frequency. The sinusoidal wave and impulsive wave systems are ... View full abstract»

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  • The Propagation of Radio Waves over the Surface of the Earth and in the Upper Atmosphere

    Publication Year: 1936, Page(s):1367 - 1387
    Cited by:  Papers (169)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4296 KB)

    Simple formulas and graphs are given which represent the ground-wave field intensity at the surface of the earth as radiated from a short vertical antenna at the surface of the earth. The theory is compared to some experimental results reported by other investigators to determine its range of application. The diffraction formula given is theoretically valid only at the lower frequencies; however, ... View full abstract»

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  • Method for measurement of high resistance at high frequency

    Publication Year: 1932, Page(s):1802 - 1806
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (447 KB)

    A simple method is described for accurately measuring high resistance at radio frequencies in terms of a capacity and a small resistance of known value. View full abstract»

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  • Relations of Carrier and Side-Bands in Radio Transmission

    Publication Year: 1923, Page(s):34 - 56
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2888 KB)

    The modulation of a carrier wave by a signal wave and the subsequent reproduction of the signal wave are discussed in terms of the sustained sinusoidal components into which the various waves may be resolved. The conception of a modulated wave as being made up of a carrier component and two side-bands is explained. The saving in frequency range resulting from transmitting a single side-band is emp... View full abstract»

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  • Directional Studies of Atmospherics at High Frequencies

    Publication Year: 1932, Page(s):1920 - 1932
    Cited by:  Papers (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2848 KB)

    A system for recording the direction of arrival and intensity of static on short waves is described. The system consists of a rotating directional antenna array, a double detection receiver and an energy operated automatic recorder. The operation of the system is such that the output of the receiver is kept constant regardless of the intensity of the static. Data obtained with this system show the... View full abstract»

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  • Electrical Constants of Dielectrics for Radio Frequency Currents

    Publication Year: 1924, Page(s):841 - 847
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    The source of power losses in a condenser may be considered as a resistance in series or in parallel with the condenser. If the resistance is considered as in series, the capacity must be considered as the effective capacity, and the power factor is given by a simple formula. If the resistance is considered as in parallel, the capacity must be considered as a pure capacity, and knowing the pure ca... View full abstract»

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  • Low Power Radio Transmitters for Broadcasting

    Publication Year: 1933, Page(s):212 - 227
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4792 KB)

    This paper discusses the place of low powered installations in the existing radio broadcast system, and the importance of apparatus for such stations meeting the present-day requirements pertaining to frequency stability, modulation capability, fidelity, and radio-frequency harmonics. The characteristics and more interesting features of a new line of transmitters covering the range of output from ... View full abstract»

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  • Theoretical and Practical Aspects of Directional Transmitting systems

    Publication Year: 1931, Page(s):1184 - 1215
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3272 KB)

    This paper discusses some of the more important principles involved in the development of the directional transmitting antennas at present employed in the Bell System short-wave facilities. The theoretical performance of directive arrays is presented by means of various curves which have been obtained by integrations based upon Poynting's theorem. The details of the mathematical derivations are om... View full abstract»

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  • The Kyle Condenser Loud Speaker

    Publication Year: 1929, Page(s):1142 - 1152
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1496 KB)

    By using the Kyle principle of construction, it has been possible to develop a practicable condenser loud speaker. The Kyle construction uses a flexible dielectric diaphragm in contact with the high points of a rigid, undulated metal plate. The electrodes of the condenser are the rigid plate and a flexible metal layer attached to the opposite surface of the dielectric. A comparatively large actuat... View full abstract»

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  • A Mechanically Resonant Transformer

    Publication Year: 1932, Page(s):516 - 519
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    A transformer for use in the audio-frequency band is described whose output potential is remarkably selective to frequency. In its simplest form the diaphragm of a telephone receiver is replaced by a tuned reed of magnetic material. When a frequency is applied to the receiver corresponding to the natural frequency of the reed it is set in vibration and its motion is employed to generate potentials... View full abstract»

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  • An Impulse Excitation Transmitter

    Publication Year: 1916, Page(s):233 - 247
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4496 KB)

    Ideal "impulse excitation," as opposed to the usual quenching gap phenomena, is described. The best conditions for impulse excitation are explained. The development of a rotary sectored gap of small separation operating in a hydrocarbon atmosphere is considered. A 2,500 volt, 60 cycle transformer charges a large capacity which discharges thru the gap and a small inductance. Effective impulse excit... View full abstract»

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  • Electronic Music and Instruments

    Publication Year: 1936, Page(s):1427 - 1463
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (9464 KB)

    Electronic music and instruments, with an incubation period of about forty years since their early beginnings, are now rapidly growing into a final commercial stage. During 1935 retail sales of these new musical instruments exceeded two million dollars in the United States alone. This paper presents for the first time in this country a review of traditional musical instruments, their advantages an... View full abstract»

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  • A Contribution to the Theory of Magnetic Frequency Changers

    Publication Year: 1920, Page(s):468 - 492
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1528 KB)

    Using iron-core one-to-one transformers, with (or without) supplementary d.c. excitation, the well-known magnetic frequency doublers and triplers can be arranged. The theory of these is developed, assuming a cubic relation between flux and field intensity. The emf. in the secondary, the effect of supplementary d.c. excitation, the primary current and phase, and the secondary current for the un-loa... View full abstract»

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  • Note on Network Theory

    Publication Year: 1932, Page(s):1660 - 1664
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Passive transducers may be connected in any manner between two pairs of terminals to form a resultant passive transducer between those terminals. In this note are given or indicated general expressions for the important properties of such a resultant transducer in terms of those of the transducers forming it for the case in which the arrangement of the subsidiary transducers can be achieved by som... View full abstract»

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  • Single- and Coupled-Circuit Systems

    Publication Year: 1930, Page(s):983 - 1016
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3560 KB)

    This article discusses networks based upon singly-tuned circuits, and upon coupled circuits with primary and secondary both resonant to the same frequency. Transmission equations are developed and it is shown that for a desired possible transmission-curve shape, the sum of all decrement coefficients must be a certain amount, readily computable for coupled circuits as well as for single circuits. C... View full abstract»

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  • The Campbell-Shackelton Shielded Ratio Box

    Publication Year: 1932, Page(s):969 - 988
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2432 KB)

    The Campbell-Shackelton shielded ratio box is intended to serve as the nucleus of a one-to-one bridge for the comparison of impedances. The transformer used in it operates effectively over the range from 50 to 50,000 cycles per second and in that range the limit of error is considered to be the greatest one of the three following terms: (1) ±0.01 ohm (resistance, inductive, or capacitive reac... View full abstract»

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  • Vacuum-Tube Nomenclature

    Publication Year: 1927, Page(s):181 - 194
    Cited by:  Papers (2)
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  • An Efficient Tuned Radio-Frequency Transformer

    Publication Year: 1925, Page(s):767 - 779
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  • Two-Mesh Tuned Coupled Circuit Filters

    Publication Year: 1937, Page(s):230 - 272
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3816 KB)

    Tuned coupled circuits have been the subject of many investigations, but few of these have produced results which are useful to the design engineer. A direct attack, avoiding the special terminology and procedures of general filter theory, seems the most effective. Several such attacks have been made, but either the results have not been fully developed, or serious restrictions have been placed up... View full abstract»

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  • Frequency Modulation Noise Characteristics

    Publication Year: 1937, Page(s):472 - 514
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5776 KB)

    Theory and experimental data are given which show the improvements in signal-noise ratio effected by frequency modulation over amplitude modulation. It is shown that above a certain carrier-noise ratio in the frequency modulation receiver which is called the "improvement threshold," the frequency modulation signal-noise ratio is greater than the amplitude modulation signal-noise ratio by a factor ... View full abstract»

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  • An Electromechanical Representation of a Piezoelectric Crystal Used as a Transducer

    Publication Year: 1935, Page(s):1252 - 1263
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    An electromechanical representation of a piezoelectric crystal which can represent the crystal when it is used to drive an external mechanical system is given in this paper. The elements of the system are evaluated in terms of the electrical, piezoelectric, and mechanical constants of the crystal. When the crystal is used as a purely electrical element, the representation reduces to the usual form... View full abstract»

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  • Measurement of Resistance and Impedances at High Frequencies

    Publication Year: 1931, Page(s):452 - 460
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    It is well known that the resistance of a conductor increases with frequency. At very high frequencies the usual method of measurement fail, especially if the unknown resistance is more than about one hundred ohms. In the following it is shown that the absolute value of the unknown impedance, when put across the end of a transmission line, is a simple function of the ratio of the currents, measure... View full abstract»

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  • A discussion on experimental tests of the radiation law for radio oscillators

    Publication Year: 1913, Page(s):3 - 10
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (783 KB)

    Work during the last three or four years has suggested a method which might prove useful in determining the law of radiation from antennae. There are two ways of arriving at the law of radiation. There is a purely mathematical way, which will be described herein. Starting with the EMF, which can be divided into two components in an infinite number of ways, the author divides the EMF between A and ... View full abstract»

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  • Alternating-Current Resistance of Rectangular Conductors

    Publication Year: 1937, Page(s):434 - 447
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4080 KB)

    New experimental data are presented for conductors having ratios of width to thickness of 1 to 1 to 2400 to 1 for frequencies up to eight kilocycles. These data are co-ordinated with existing data furnishing an experimental proof of the "principle of similitude." "Skin effect" formulas are also checked with the experimental data over the range of frequencies for which these relations apply. View full abstract»

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  • Theory of Loop Antenna with Leakage between Turns

    Publication Year: 1937, Page(s):1574 - 1594
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1656 KB)

    The theory of the receiving loop antenna of two turns with distributed leakage, conductive and reactive, is developed. Equations are derived for currents and voltages along the loop and at the terminals. For terminal currents and voltages the effect of leakage may be expressed by means of a single function H, and the loop may be represented by an equivalent two-mesh circuit of lumped constants. Th... View full abstract»

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  • Filtering Antennas and Filter-Valve Circuits

    Publication Year: 1929, Page(s):161 - 173
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    Some methods of coupling together many circuits or antennas giving them simultaneous excitation from the same source of energy are described. The purpose of such arrangements is the construction of practical filter circuits (filtering antennas) giving square-topped resonance curves with good efficiency. Some interesting phenomena with coupled antennas are described. View full abstract»

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Aims & Scope

This Periodical ceased production in 1938. The current retitled publication is Proceedings of the IEEE.

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