Prior to 1965 nearly all microwave equipment utilized coaxial, waveguide, or parallel strip-line circuits. In recent years-with the introduction of monolithic microwave integrated circuits (MMICs)-microstrip lines and coplanar strip lines have been used extensively, because they provide one free and accessible surface on which solid-state devices can be placed. The most common and popular strip lines are parallel, coplanar, and shielded strip lines and microstrip lines, which are shown figure and are described below :
Figure : Schematic diagrams of strip lines.
Types of Strip lines :
The common types of strip lineas are listed below :-
1. Microstrip Lines
2. co-planar strip lines
3. parallel strip lines
4. shielded strip lines