Vehicle-mounted ultra-wideband discrete loaded semi-elliptical antenna

The invention discloses a vehicle-mounted ultra-wideband discrete loaded semi-elliptical antenna. A transmitting antenna unit and a receiving antenna unit are each composed of two identical semi-elliptical antenna arms. The semi-elliptical antenna arms are correspondingly installed in a paired parallel manner in a reflection cavity which is equally divided by a baffle. The two semi-elliptical antenna arms in the same column are symmetrically printed on the front of an insulated dielectric plate to form a set of ultra-wideband dipole antennas. The two semi-elliptical antenna arms adjacent to the gap are each provided with an input port as a feeding end. Multiple slits are uniformly distributed on the semi-elliptical antenna arms along the major semi-axis direction. Multiple discrete loading resistors are uniformly welded into each slit. The two ends of the bottom side of each semi-elliptical antenna arm are each connected with a metal band through a connecting resistor. The open side of the refection cavity an