Procedure for designing diplexing filter with rectangular waveguide inputs and outputs using circular TE011 mode resonators;advantage of using TE011 mode resonators in otherwise conventional arrangement lies in their ...
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Procedure for designing diplexing filter with rectangular waveguide inputs and outputs using circular TE011 mode resonators;advantage of using TE011 mode resonators in otherwise conventional arrangement lies in their high intrinsic Q characteristic;latter is necessary in realizing low loss, high loaded Q diplexers;four such diplexers were developed for use as local oscillator injection filters to mixers at center frequency 50. 4 GHz;signal band of interest was 51.7 plus or minus 0.3 GHz;experimental models had 3 db bandwidth of 50 GHz and midband insertion loss of 1.5 db.
The fundamental behavior of hybrid circuits is reviewed and discussed, largely in terms of reciprocity relationships. The phase properties of simple wave-guide tee junctions are briefly considered. Two linds of hybrid...
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The fundamental behavior of hybrid circuits is reviewed and discussed, largely in terms of reciprocity relationships. The phase properties of simple wave-guide tee junctions are briefly considered. Two linds of hybrid circuits are then described, the one involving a ring or loop of transmission line, the other relying upon the symmetry properties of certain four-arm junctions. The description is centered about wave-guide structures for microwaves, but the principles may also be applied to other kinds of transmission line for other frequency ranges. Experimental verification is provided, and some of the important applications are outlined.
The problem of determining the interrelationships among the chain parameters of a nonuniform transmission line (NUTL) is reformulated using a method more direct and intelligible than that previously used, and, in addi...
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The general problem of determining the distribution of current and the driving point impedances of a square loop or frame antenna is formulated when arbitrary driving voltages are applied at each corner or when up to ...
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This paper concerns trigger and pulse circuits for transistors having emitter-to-collector current gain (such as point-contact units). The circuits are designed to permit reliable operation with transistors which are ...
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This paper concerns trigger and pulse circuits for transistors having emitter-to-collector current gain (such as point-contact units). The circuits are designed to permit reliable operation with transistors which are not completely uniform; they also allow reasonable variation of circuit parameters or bias voltages. Quantitative analysis is made possible by use of simplified circuit theory which divides the nonlinear characteristic of a transistor and its associated feedback and external resistances into quasi-linear regions. By this analysis, one can predict both the type of operation, i.e., monostable, bistable, and astable (oscillatory), and the amplitude and waveform of the output. A basic monostable circuit consists of a single transistor with a resistance in the base lead to provide feedback and a capacitance or, preferably, a transmission line as the emitter load. This circuit can be used to regenerate periodic or nonperiodic pulses, thereby providing a standardized output pulse shape, or to generate single pulses when initiated; it is possible to provide very intense short pulses (up to one ampere) even with transistors of low power-handling ability. The output pulses may be arbitrarily delayed with respect to the input, and amplitude discrimination against noise or spurious signals is also possible. Bistable circuits also use a single transistor with external resistances. It is shown that lack of reliability of previously used bistable single-transistor circuits can be overcome by proper arrangement of circuit parameters and bias supplies and, in some cases, by use of a nonlinear resistance (crystal diode) as the emitter load.
Equivalent circuits are developed for the various types of salient-pole synchronous and asymmetrical induction machines, expressed along the physical direct and quadrature axes (cross-field theory). The torques again ...
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Equivalent circuits are developed for the various types of salient-pole synchronous and asymmetrical induction machines, expressed along the physical direct and quadrature axes (cross-field theory). The torques again are found by a direct measurement of power. The networks of all types of machines are found as special cases of that of the “primitive” machine. All equivalent circuits along the physical axes are derivable from those along the hypothetical symmetrical component axes (revolving-field theory) by a real transformation. Although the latter types of networks have already been published previously, they are reproduced here for comparison with the new networks and for a unified tensorial treatment of rotating machines and their equivalent circuits. COPYRIGHT 1948 BY THE AMERICAN INSTITUTE OF ELECTRICAL ENGINEERS
Following the fundamentals set down in an earlier paper, the impedance representation of a right-angle bend in a rectangular wave guide is calculated. Two types of bends are considered, being defined by the polarizati...
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Following the fundamentals set down in an earlier paper, the impedance representation of a right-angle bend in a rectangular wave guide is calculated. Two types of bends are considered, being defined by the polarization of the electric field relative to the plane of the bend. The results are stated in the form of infinite series. Numerical results are given
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