It is excerpted from the report: ISM-Band and Short Range Device Antennas. The following common antennas are covered in detail in this section: half-wave dipole, quarter wave ... radius a for square ...

The half-wave dipole offers the “doughnut with collapsed hole” pattern shown in the cross-sectional view. It is easy to see from Fig. 1 that, depending on the antenna's orientation, it can provide ...

3. This is the horizontal (E field) radiation pattern of a half-wave dipole antenna. The antenna elements are located along the 270° to 90° line. 4. This is the vertical radiation pattern ...

You probably know there’s something magic about antennas that are a quarter wave long or a half wave long and other ... of explaining charge movement in a dipole but what follows just looks ...