Question

The fundamental radio antenna is a metal rod which has a length equal to

• A. $\lambda$ in free space at the frequency of operation
• B. $\frac{\lambda }{2}$ in free space at the frequency of operation
• C. $\frac{\lambda }{4}$ in free space at the frequency of operation
• D. $\frac{3\lambda }{4}$ in free space at the frequency of operation

Answer 1

Answer: (C)

The common antenna is a straight conductor of length $1=\frac{\lambda }{4}$ held vertically with its lower end touching the ground.