DIY FM dipole antenna or half wave antenna are the most used because is easy to build and cost a few bucks but has some drawbacks like little directionality, small gain. The rf dipole antenna is build ...

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.

If the half-wave dipole is the standard by which most other antennae are compared, then the reference point for vertical antennas is the quarter-wave vertical. Frequency multiplied by wavelength is ...