Which type of antenna is made of two parallel wires with the ends connected?

The folded dipole antenna is indeed made of two parallel wires with the ends connected, which distinguishes it from other types of antennas. This design allows the folded dipole to provide a higher input impedance compared to a standard dipole, making it more suitable for certain applications, especially in TV antennas and broadband operations. The folding creates two parallel conductors which can improve the impedance matching with the transmission line, thus minimizing signal loss.

In contrast, a standard dipole consists of two straight elements, typically not connected at the ends. A Yagi antenna is a more complex design that includes multiple elements for gain and directionality, and a monopole antenna is primarily a single conductor mounted above a ground plane. Therefore, the characteristics and structure of the folded dipole specifically align with the description given in the question, confirming its role as the correct answer.