The cubical quad antenna is a four sided antenna.
Each side of the quad is about a quarter wave length long.
(1005/frequency = Full Wave Length)

The Dipole is a half wave antenna with one quarter wave length for each leg.
(468/frequency = Half Wave Length)

The actual antenna lengths depend on various factors. Such as height above ground,
diameter of the wire used and even the conductivity of the soil.
Enter Frequency in Mhz. :