The transition theory which Kikuchi proposed first was improved and expanded in the range of the Sommerfeld line above ground and even the Goubau line (G line) above ground. Then it was proved by the experiment with t...
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The transition theory which Kikuchi proposed first was improved and expanded in the range of the Sommerfeld line above ground and even the Goubau line (G line) above ground. Then it was proved by the experiment with the aid of the G line. The solution for the electromagnetic field produced by an overhead wire is derived using Maxwell's equations and treating the situation as a boundary value problem. In particular, the integrals which are caused by the finite conductivity of the earth and which are responsible for the distribution of the fields in the neighborhood of the surface of the earth are evaluated by means of the saddle-point method. Based on the field theory described above, the primary transmission line constants of the G line above ground (R, L, C, and G) and the secondary transmission line constants (gamma/sub 0/ = alpha/sub 0/ + j beta/sub 0/ and Z/sub 0/) were obtained, and then the equivalent circuit for the G line above ground was given. The behavior of the line from an engineering standpoint is now completely determined by the usual simple circuit theory. The transition of the G line from a ground return transmission line of a surface-wave transmission line was proved experimentally.
There is a need for a simple FM noise measurement technique for signal sources operating below 5 GHz. Improved transmission line discriminators are described which have good immunity to incidental AM on the test signa...
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There is a need for a simple FM noise measurement technique for signal sources operating below 5 GHz. Improved transmission line discriminators are described which have good immunity to incidental AM on the test signal and have adequate threshold. Operating procedures and experiences are discussed.
With a quasi-TEM approximation, the characteristic parameters of numerous structures used as hyperfrequency microelectronics transmission lines can be calculated with the aid of conformal mapping. Simple theoretical f...
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With a quasi-TEM approximation, the characteristic parameters of numerous structures used as hyperfrequency microelectronics transmission lines can be calculated with the aid of conformal mapping. Simple theoretical formulas are rarely used since they bring into play the function K(k)/K'(k) where K(k) is the complete elliptic integral of the first type, K'(k) its complementary function, and k its argument.
The compression of voltage pulses by a cascade of transmission lines is investigated, and a simple derivation is given for the case in which the characteristic impedances of the individual lines are independent of the...
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The compression of voltage pulses by a cascade of transmission lines is investigated, and a simple derivation is given for the case in which the characteristic impedances of the individual lines are independent of the compression factor. The possibility of using a single nonuniform transmission line (NUTL) for voltage compression is examined, and it is shown that a distortionless compression is not attainable by a practical NUTL. Lumped parameter approximations of the NUTL are suggested.
A mathematical model is derived that relates the impedance of a cavity-backed slot antenna to that of an identical slot which is free to radiate on both sides of a large ground plane. The model, which utilizes empiric...
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The development of a Ku-band receiver front-end using microwave integrated circuit technology is described. The front end elements, including a GaAs FET RF balanced amplifier stage, an image reject mixer, and a varact...
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The development of a Ku-band receiver front-end using microwave integrated circuit technology is described. The front end elements, including a GaAs FET RF balanced amplifier stage, an image reject mixer, and a varactor controlled GaAs FET oscillator are integrated in a very small simple hermetic package. Electrical design details are presented for the varactor controlled FET oscillator development.
Baseband waves in nonuniform transmission lines are analyzed by a perturbation procedure emphasizing one-dimensional axial propagation. Successive orders of approximation generate both localized fields and new waves p...
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Baseband waves in nonuniform transmission lines are analyzed by a perturbation procedure emphasizing one-dimensional axial propagation. Successive orders of approximation generate both localized fields and new waves propagating out from nonuniform regions.
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