Abstract EN:

This thesis is to carry out a study and a development of active inductors and their applications in MMIC. A new method for the synthesis of active networks in microwave frequency is proposed. This method is to use a transfer from the CCII- (second generation current conveyor) to the transistor MESFET by the way of the nullator-norator technique. Employing this method, a number of new microwave active inductors with high performances are derived. In the first part of this thesis, the active networks theory and the current conveyor are presented. A transfer between the CCII- and the microwave transistor MESFET which is important for the approach afterwards is proposed. Some new broadband MMIC grounded and floating active inductors are proposed in second part for general purpose use in microwave circuits. Two methods are used in this thesis for realizing the active inductor : one is the method gyrator that is well-known and other is the method “transfer CII-/MESFET”. These new circuits can be applied in many areas, especially in the realization of microwave active filters. Finally, the applications of the active inductors realizing microwave active filters and active phase shifter are presented. The design technique of active filter is to replace the passive inductors in the conventional LC ladder filter by the proposed active inductors.