a dipole antenna的用法和样例：
- The radiation patterns and directivities of a dipole antenna and antenna arrays excited by sinusoidal and walsh waves are compared.
- The influence of ground screen on vertical dipole antenna was studied.
- The folded dipole antenna is probably only ever seen as a TV antenna.
- In this thesis, we describe the design of the printed planar log periodic dipole antenna.
- It is what is called a dipole field with a north and South Pole.