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The Influence of the Air Gap on the Characteristics of the Double-Shielded Microstrip Delay Devices

Mikucionis S., Urbanavicius V., Gurskas A., Krukonis A.

Przegląd Elektrotechniczny

2014

R. 90, nr 6

275--279

A double-shielded microstrip (DSM) device is made of conventional microstrip device and by mounting additional shielded dielectric plate on top of it. The resulting structure is similar to the strip line, but there is a significant difference – a thin air gap that is equal to the thickness of the microstrip. The thickness of this air gap can become uncontrollable in the device manufacture process. In this paper the influence of thin air gap on the electrical parameters of DSM devices such as: microstrip line, coupled lines, multiconductor line, and meander delay line is investigated.

W podwójnie ekranowanym mikropasku (DSM) układu opóźniającego DDs dodano dodatkową warstwę dielektryczną. Cienka szczelina powietrzna ma grubość paska. Ta szczelina może być trudna do kontrolowania w procesie produkcji. W artykule analizowano wpływ szczeliny powietrznej na parametry układu DSM.

On the Constrained Controllability of Dynamical Systems With Multiple Delays in the State

Sikora B.

International Journal of Applied Mathematics and Computer Science

2003

Vol. 13, no 4

469-479

Linear stationary dynamical systems with multiple constant delays in the state are studied. Their relative and approximate controllability properties with constrained controls are discussed. Definitions of various types of controllability with constrained controls for systems with delays in the state are introduced. Some theorems concerning the relative and the approximate relative controllability with constrained controls for dynamical systems with delays in the state are established. Various types of constraints are considered. Numerical examples illustrate the theoretical analysis. An example of a real technical dynamical system is given to indicate one of possible practical applications of the theoretical results.