🔍 Key Concepts

• Radio frequency insulators and how they differ from low-frequency or DC insulators • Common ceramic and plastic materials used in RF coils, capacitors, and transmission lines • Why dielectric loss and heating at RF matter for material choice

💭 Think About

• Think about which materials are commonly used as spacers or supports inside RF antennas, coils, and capacitors where you do NOT want energy loss • Ask yourself which listed materials are known for low dielectric loss and good stability at high frequencies, not just good electrical insulation at low voltage • Consider whether the materials listed are typically glass, ceramic, or plastic dielectrics that stay cool and stable at RF power levels

✅ Before You Answer

• Verify which choices include ceramic RF insulators specifically designed for high-frequency work • Check which materials are known for low dielectric loss at RF (look for usage in RF capacitors, coils, and transmission lines) • Be sure you distinguish between materials that are good general insulators and those that are specifically favored for radio frequencies