🔍 Key Concepts

• Resonant frequency of an antenna–what it means in terms of electrical length • How inductance (L) and capacitance (C) affect resonance in an LC circuit • Relationship of resonance to the electrical length of an antenna compared to the operating wavelength

💭 Think About

• Think about what happens to the resonant frequency of a series LC circuit when you increase the inductance while keeping capacitance the same. • Is adding an inductor in series with the antenna effectively making the antenna seem electrically longer or shorter? How does that change its resonant frequency? • Recall the basic resonance formula and imagine what happens if L gets larger, with C constant.

✅ Before You Answer

• Write down the resonance formula: f = 1 / (2π√(LC)) and see how f changes when L increases. • Decide whether adding series inductance is a method used to "load" a short antenna to make it resonate at a lower or higher frequency. • Eliminate options that describe processes (like neutralization/equalization) that are not simple up/down changes in resonant frequency.