The design and experimental investigation of a simple logic circuit employing Josephson tunnel junctions as the switching elements is described. The design utilized matched transmission lines as signal carriers. The p...
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The design and experimental investigation of a simple logic circuit employing Josephson tunnel junctions as the switching elements is described. The design utilized matched transmission lines as signal carriers. The physical layout was simulated on a computer with a model consisting of 3 Josephson gates and 28 transmission line segments. Results of both quasi-static and high speed testing were found to be in essential agreement with theoretical expectations; only dynamic results are presented here in detail. The experimental circuit had gates with 165 ps risetimes, and in the high speed investigation, was operated with bursts of 700 ps risetime pulses tightly spaced so as to simulate a repetition rate of ∼1 GHz.
Several properties of solitary waves that were measured on an easily constructed transmission line of very modest size (50 sections 1-m length) are described. Among the properties observed are their generation by a pu...
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Several properties of solitary waves that were measured on an easily constructed transmission line of very modest size (50 sections 1-m length) are described. Among the properties observed are their generation by a pulse or a sine wave, the recurrence phenomena, and the collision of two solitary waves.
A technique is presented which is applicable to any uniform coupled open transmission lines such as coupled optical integrated circuits. The proposed technique is as follows. The electromagnetic fields of the wave pro...
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A technique is presented which is applicable to any uniform coupled open transmission lines such as coupled optical integrated circuits. The proposed technique is as follows. The electromagnetic fields of the wave propagating along a coupled line is expressed in terms of a linear combination of the fields associated with the individual lines, as a zero-order approximation. Inserting this trial field description into the variational expression for the propagation constant beta and applying the well-known Rayleigh-Ritz's procedure, accurate solutions for the propagation constants of the coupled lines are obtained. This method can be applied generally to analyze coupled structures in microwave, millimeter wave, and optical wave circuitry. As an illustrative example, the coupling between two optical transmission lines consisting of lens-like dielectric media has been analyzed by means of the proposed technique.
It is shown that the solutions for wave propagation on a nonuniform transmission Iine, recently proposed by Bergquist, are alternative forms of, or easily derivable from, the results of Protonotarios and Wing, given e...
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It is shown that the solutions for wave propagation on a nonuniform transmission Iine, recently proposed by Bergquist, are alternative forms of, or easily derivable from, the results of Protonotarios and Wing, given earlier.
A parallel plate transmission line circuit has been developed which facilitates rapid testing of experimental TRAPATT diodes. In this circuit the impedance of each tuning element can be continuously varied. This is an...
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A parallel plate transmission line circuit has been developed which facilitates rapid testing of experimental TRAPATT diodes. In this circuit the impedance of each tuning element can be continuously varied. This is an appreciable advantage over conventional coaxial TRAPATT circuits which use fixed diameter slugs.
Physical parallels of transmission lines with communication circuits and railroad signal circuits cause induced voltages which may interfere with normal operation. Due to the demand for more efficient uses of existing...
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A 12-GHz low-noise converter consisting of a planar circuit mounted in waveguide is described. This circuit consists of a metal sheet with proper patterns that is inserted in the middle of a waveguide parallel to the ...
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A 12-GHz low-noise converter consisting of a planar circuit mounted in waveguide is described. This circuit consists of a metal sheet with proper patterns that is inserted in the middle of a waveguide parallel to the E plane. All circuit elements required for the converter are pressed or etched. This circuit is very useful for low-cost mass production and good performance. A measured noise figure of 4.5 dB was obtained with a 12-GHz signal frequency and a 420-MHz intermediate frequency.
The program analyzes and optimizes certain cascaded linear time-invariant networks in the frequency domain made up of two-port elements such as resistors, inductors, capacitors, Iossless transmission lines, lossless s...
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The program analyzes and optimizes certain cascaded linear time-invariant networks in the frequency domain made up of two-port elements such as resistors, inductors, capacitors, Iossless transmission lines, lossless short-circuited, and open-circuited transmission line stubs, series and parallel RLC resonant circuits and microwave allpass C- and D-sections.
A simple but accurate wave transducer has been developed for measuring waves on inland and coastal waters, consisting of a tunnel diode oscillator, using an open transmission line to sense the water-level. The output ...
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A simple but accurate wave transducer has been developed for measuring waves on inland and coastal waters, consisting of a tunnel diode oscillator, using an open transmission line to sense the water-level. The output signal is a pulse train with a period linearly proportional to the length of transmission line above the water surface.
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