The design and performance of a five-bit S-Band diode phase shifter is described. This thick-film microstrip device uses series coupled diodes for the small bits and constant phase-frequency switched line bits for the...
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The design and performance of a five-bit S-Band diode phase shifter is described. This thick-film microstrip device uses series coupled diodes for the small bits and constant phase-frequency switched line bits for the three large bits.
This paper describes some new circuit approaches and corresponding performance breakthroughs for F-Band TRAPATT diode circuits. Power outputs of up to 200 watts have been measured for fundamental mode operation at F-B...
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This paper describes some new circuit approaches and corresponding performance breakthroughs for F-Band TRAPATT diode circuits. Power outputs of up to 200 watts have been measured for fundamental mode operation at F-Band using alumina substrate circuits.
Rigorous equivalent networks are presented in catalog form for a large variety of planar acoustic interfaces between two media. Although these networks are phrased in electrical terms, involving voltage and current an...
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Rigorous equivalent networks are presented in catalog form for a large variety of planar acoustic interfaces between two media. Although these networks are phrased in electrical terms, involving voltage and current and lumped electrical elements, there is nothing electrical in them. The circuits are purely acoustic in content but electrical in form. These networks are consistent with the microwave network approach described in the companion paper [1], which views an overall structure in terms of uniform regions characterized by modal transmission lines and junction regions represented by lumped equivalent networks. The class of junction regions treated here, namely, planar interfaces between different isotropic media, is a very important one since such interfaces occur as basic constituents in many complicated structures which arise in applications as diverse as ultrasonic surface waves and seismology. In acoustics, a fairly involved coupling of waves can occur at these interfaces; in electromagnetics, by contrast, only simple effects arise and the description becomes trivial.
A greal deal of effort has recently been spent to develop numerical integration techniques suitable for the solution of stiff state equations. Instead of dealing with the integration method itself, a procedure for gra...
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A greal deal of effort has recently been spent to develop numerical integration techniques suitable for the solution of stiff state equations. Instead of dealing with the integration method itself, a procedure for gradually removing the stiffness of the state equations during the course of the solution is presented. This is accomplished by gradually discarding the state variables corresponding to the eigenvalues having the largest negative real part as their contribution becomes negligible. Since the reduction process is applied to the equations themselves, it can therefore be used to reinforce any numerical method of solution, particularly in those applications where adaptation of an implicit integration method is difficult.
Microstrip transmission lines used in microwave integrated circuits are dispersive. The dispersion of the lines is fully characterized by the frequency-dependent normalized phase velocity VP which is equal to the rati...
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Microstrip transmission lines used in microwave integrated circuits are dispersive. The dispersion of the lines is fully characterized by the frequency-dependent normalized phase velocity VP which is equal to the ratio of guide wavelength λ g to free-space wavelength λ 0 . An approximate equation is given for the normalized phase velocity VP and for the frequency-dependent line impedance Z for standard microstrip transmission lines. Comparison with available experimental data and computed data shows that the error of the approximation is less than 3 percent for microstrip transmission lines commonly used in engineering applications.
This paper describes techniques for analog computer simulation of coupled parallel transmission lines erected on the same right-of- way. A particular simulation is given consisting of one 500-kV and two 230-kV three-p...
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This paper describes techniques for analog computer simulation of coupled parallel transmission lines erected on the same right-of- way. A particular simulation is given consisting of one 500-kV and two 230-kV three-phase transmission lines interconnecting areas separated by 126 miles within the Florida Power Corporation network. Some typical results of a comprehensive line switching study are presented and discussed.
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