RADAR ANTENNA UNIT AND RADAR DEVICE

摘要

A radar antenna assembly includes a transmitting antenna including transmitting horns and receiving antennas including receiving horns. The receiving antennas are at regular intervals in a second direction perpendicular to a first direction, and the transmitting antenna is adjacent to the receiving antennas in the second direction. The transmitting horns are at regular intervals in the first direction, and the transmitting antenna includes an oblique arrangement portion and a reverse oblique arrangement portion. The reverse oblique arrangement portion is adjacent to the oblique arrangement portion in the first direction, and the oblique arrangement portion and the reverse oblique arrangement portion are symmetrical to each other about a plane perpendicular to the first direction. The transmitting horns included in the oblique arrangement portion or the reverse oblique arrangement portion are adjacent to each other in the first direction with at least two sorts of magnitude of displacement therebetween.

主权项

1. A radar antenna assembly, comprising:
a transmitting antenna including a plurality of transmitting horns defining an oblique arrangement portion and a reverse oblique arrangement portion; and a plurality of receiving antennas each including a plurality of receiving horns arranged in a first direction; wherein the plurality of receiving antennas are arranged in a second direction perpendicular or substantially perpendicular to the first direction; the transmitting antenna is disposed adjacent to the receiving antennas in the second direction; the transmitting horns included in the oblique arrangement portion are displaced from each other in the second direction along the arrangement of the transmitting horns in the first direction, and the transmitting horns included in the reverse oblique arrangement portion are displaced from each other in a direction opposite to the second direction along the arrangement of the transmitting horns in the first direction; the plurality of transmitting horns are disposed at regular intervals in the first direction; the reverse oblique arrangement portion is disposed adjacent to the oblique arrangement portion in the first direction; the arrangement of the transmitting horns included in the oblique arrangement portion and the arrangement of the transmitting horns included in the reverse oblique arrangement portion are symmetrical to each other with respect to a plane perpendicular or substantially perpendicular to the first direction; the transmitting horns included in the oblique arrangement portion or the reverse oblique arrangement portion are adjacent to each other in the first direction with at least two different magnitudes of displacement in the second direction therebetween; a number of the transmitting horns is 2N, where N denotes an integer equal to or greater than 1; the plurality of receiving antennas are arranged at regular intervals P in the second direction; and an average value of displacements in the second direction between the transmitting horns adjacent in the first direction is equal to or smaller than 2P/N and equal to or greater than P(N−1)/N2.