Planar Layers, Strip Lines, Patches, and Apertures

This chapter discusses excitation of waves in planar layers and considers strip lines, patches, and apertures in dielectric layers which are useful in microwave and millimeter wave applications. The chapter also considers the excitation of transverse magnetic (TM) waves on a dielectric slab placed on a conducting plane, where it is the two‐dimensional problem. Strip lines have many attractive features. The most common types have a strip of conductor on a grounded dielectric slab. Even though the hybrid mode analysis is required for exact analysis of strip lines, simpler techniques can be used for approximate analysis of strip lines. One useful method is the quasi‐static approximation, in which E
_z
and H
_z
are neglected and the field is assumed to be transverse electro magnetic (TEM). Finally, the chapter examines periodically placed patches and apertures embedded in dielectric layers.