What happens to the bandwidth of an antenna...

Question 1 / 270704EQBmtGXBaTKYnrFQdEv

Question 1 of 270704EQBmtGXBaTKYnrFQdEv

What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?

Question 1 of 27070

What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?

🔍 Key Concepts

• Relationship between antenna length and resonant frequency • How loading coils simulate added electrical length in a physically short antenna • Effect of changing antenna Q (quality factor) on bandwidth

💭 Think About

• When you add loading coils to make a short antenna resonate, what usually happens to its Q (does it get higher or lower)? • If an antenna has a higher Q, what does that do to the range of frequencies over which it operates efficiently? • Think about whether a shortened, loaded antenna is generally more or less efficient over a wide range of frequencies than a full-size antenna.

✅ Before You Answer

• Recall that bandwidth is the range of frequencies where SWR and efficiency are acceptable, not just the single resonant frequency. • Connect high-Q vs low-Q behavior to narrow vs wide bandwidth. • Picture a graph of antenna response vs frequency: how does loading to shorten the antenna change the sharpness of the tuning curve?

Question 1 of 27070

What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?

It is increased.

It is decreased .

No change occurs.

It becomes flat.