77GHz vehicle-mounted radar low sidelobe microstrip array antenna with shielding cover

Abstract

The invention relates to a 77GHz vehicle-mounted radar low sidelobe microstrip array antenna with a shielding cover. The antenna comprises a dielectric substrate, a radiation antenna array, a feed structure and the shielding cover; the radiation antenna array and the feed structure are arranged on one surface of the dielectric substrate; the feed structure comprises a power divider and a feed microstrip line; the input end of the power divider is connected with an external radio frequency chip through the feed microstrip line, and the output end of the power divider is connected to the radiation antenna array through the feed microstrip line; and the shielding cover is fixed on the dielectric substrate and covers the power divider. The antenna has the beneficial effects that the shieldingcover is arranged on the feed structure, so that the influence and interference of environmental radiation on the working state of the radar antenna are effectively prevented, large-angle radiation leakage is shielded, and the gain and low sidelobe performance of the array antenna are improved. Meanwhile, the antenna also has the advantages of high stability, low cost, array antenna protection andthe like.

Description

technical field [0001] The present application relates to the technical field of automobile auxiliary driving, in particular to a 77GHz vehicle-mounted radar low-sidelobe microstrip array antenna with a shielding cover. Background technique [0002] In recent years, with the popularity of cars and the increasing demand for autonomous driving, millimeter-wave radar has become one of the main detectors because of its good distance detection and low cost. There are more and more millimeter-wave radar sensors equipped on vehicles, mainly including speed radar, adaptive cruise control, anti-collision radar, blind spot monitoring, automatic emergency braking, etc. [0003] The antenna is the core component of the radar, and its function is equivalent to the eyes of the radar. Whether the radar can capture the target signal depends on whether the electrical performance index of the antenna meets the requirements. Among them, the array antenna is widely used in 77GHz forward radar ...

AI Technical Summary

Problems solved by technology

[0004] The above measures have improved the performance of automotive radar antennas to varying degrees, but they have not solved the impact of environmental radiation on radar antennas and the problem of large-angle radiation leakage from radar antennas.

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