generate questions: The reinforcement type defines two major classes of materials - woven and non-woven. Woven reinforcements are cheaper, but the high dielectric constant of glass may not be favorable for many higher-frequency applications. The spatially nonhomogeneous structure also introduces local variations in electrical parameters, due to different resin/glass ratio at different areas of the weave pattern. Nonwoven reinforcements, or materials with low or no reinforcement, are more expensive but more suitable for some RF/analog applications.
Along with the non-woven class, what makes up the reinforcement type materials? {sep_token} Which is the more expensive reinforcement type? {sep_token} What type of structure do woven reinforcements have that cause them to have variation in their electrical parameters? {sep_token} Which ratio varies because of the structure of woven reinforcements? {sep_token} For what kind of applications are non-woven reinforcement materials better than woven ones?