Automation Technique for the Plunger in Liquid Cell of X-Band Microwave Bench Using Stepper Motor

Abstract

Automation is the use of Computer controlled stepper motors. It is one of the most versatile forms of positioning systems. Generally dielectric parameters of different polar liquids, binary mixture of polar liquid with non polar liquid in different mole fraction or weight fraction are measured by using X-band Microwave bench manually. The measurements done manually are not much accurate and exact. Hence, personal computer (PC)based automatic measurement technique is used for accurate measurement of the dielectric parameters. PC based stepper motor moves the plunger in liquid cell of microwave bench & measures the distance up to fraction of mm to nanometer per step. This technique is used to give the maximum accuracy for the measurement of λd. Further accuracy of this technique can be increased when the stepper motor is operated in micro stepping mode.