🔍 Key Concepts

• Hertzian antenna (short dipole) – an idealized antenna that is very small compared to the radiated wavelength • The relationship between antenna physical length and operating wavelength (λ) in basic antenna theory • Difference between antenna length and lengths of coaxial/RF feed lines

💭 Think About

• Which options talk about the antenna itself versus the feed line (coaxial or RF line)? For this question, which is more relevant to radiated wavelength? • In simple antenna theory, what common fractions of a wavelength are used for basic dipole or monopole antennas (think of terms like quarter-wave and half-wave antennas)? • If a Hertzian (very short) antenna is an idealized model, how does its physical length compare to the wavelength it is used to analyze?

✅ Before You Answer

• Focus on the answer choices that directly relate wavelength to the antenna’s physical length, not to the transmission line. • Recall that a classic center-fed dipole is often about ½ λ long and a monopole over a ground plane is often ¼ λ long—compare these typical values to the choices given. • Make sure the choice you pick talks about wavelength in terms of λ vs. physical antenna length, and not about modulation or coaxial/RF line properties.