Design of different microwave circuits using microstrip lines

Abstract

Microwave is a form of electromagnetic radiation, as are radio waves, ultraviolet radiation, newlineX-rays and gamma-rays with wavelengths ranging from ten centimeters to one centimeter; newlinewith frequencies between 3 GHz (10 cm) and 30 GHz (1 cm).Circuits, components in this newlinerange are designed using transmission lines. The most common forms of transmission lines newlineused in this range are: newline Stripline was invented by Robert M. Barrett of the Air Force Cambridge Research newlineCentre in the 1950s. newline Microstrip line was developed by ITT laboratories as a competitor to stripline (first newlinepublished by Grieg and Engelmann in the December 1952 IRE proceedings). newline Coplanar Waveguide was invented in 1969 by Cheng P. Wen newlineVarious microwave components and circuits like filters, resonators, amplifiers, couplers, newlinehybrids, etc. can be designed using these microstrip lines [1] [3]. The goal of this research newlinework is to design some of these microwave circuits (mainly amplifiers, filters, resonators) newlineusing microstrip lines. The major advantage of microstrip lines is that the active components newlinecan be mounted on top of the board since it features ease of interconnections and adjustments. newlineThe microstrip lines are less expensive than traditional waveguide. The designs using newlinemicrostrip lines are lighter and more compact in size. Also we can design any value of newlinecapacitor or inductor by microstrip line technique, but any value of lumped capacitor or newlineinductor in any frequency range is not commercially available. So, there is much flexibility in newlinedesigning of amplifier, filter and resonator in this process. newline