Radar antenna with director

A radar antenna with director, for working with a signal source for radiative transmission, the radar antenna comprising:

• a first main body, having a receiving channel and two first transmission channels communicated with the receiving channel, wherein the receiving channel is for receiving the signal source, and a splitter arranged between the two first transmission channels is for splitting the signal source into two first radiative signals and transmitting the two first radiative signals through the two first transmission channels, respectively, a secondary splitting portion raised from two sides of the splitter along an X-axis direction;
• and
• a second main body, being located at one side of the first main body that has the two first transmission channels, and comprising two second primary transmission channels communicated with the two first transmission channels, respectively, and two second secondary transmission channels flanking the two second primary transmission channels, wherein each of the second primary transmission channels has one end thereof adjacent to the first main body has a primary receiving hole, which has a hole size equal to a hole size of each of the first transmission channels, and each of the second secondary transmission channels is communicated with the corresponding second primary transmission channel through a coupling hole, whereby each of the first radiative signals is split into two second radiative signals through coupling by the coupling hole, and the two second radiative signals are radiatively output in a direction away from the first main body through the second primary transmission channels and the second secondary transmission channels, respectively,
• wherein the X-axis direction is perpendicular to the connecting direction of the first main body and the second main body.