An antenna apparatus, comprising an antenna array and a control unit, wherein the antenna array comprises at least N rows and M columns of radiating elements; the control unit is configured to: determine a first antenna subarray from the N rows and M columns of radiating elements, wherein the first antenna subarray comprises X1 rows and Y1 columns of radiating elements, 1 ≤ X1 ≤ N, 1 ≤ Y1 ≤ M, and X1 > Y1; control a phase shift increment change of the first antenna subarray to generate a plurality of first beams, wherein different phase shift increments correspond to different first beams; and determine a first aligned beam from the plurality of first beams based on a feedback from a receive end; and the control unit is further configured to: determine a second antenna subarray from the N rows and M columns of radiating elements, wherein the second antenna subarray comprises X2 rows and Y2 columns of radiating elements, 1 ≤ X2 ≤ N, 1 ≤ Y2 ≤ M, and Y2 > X2; control a phase shift increment change of the second antenna subarray to generate a plurality of second beams, wherein different phase shift increments correspond to different second beams; determine a second aligned beam from the plurality of second beams based on a feedback from the receive end; and determine a beam direction range based on a direction range in which the first aligned beam intersects with the second aligned beam. the antenna array comprises at least N rows and M columns of radiating elements; the control unit is configured to: determine a first antenna subarray from the N rows and M columns of radiating elements, wherein the first antenna subarray comprises X1 rows and Y1 columns of radiating elements, 1 ≤ X1 ≤ N, 1 ≤ Y1 ≤ M, and X1 > Y1; control a phase shift increment change of the first antenna subarray to generate a plurality of first beams, wherein different phase shift increments correspond to different first beams; and determine a first aligned beam from the plurality of first beams based on a feedback from a receive end; and the control unit is further configured to: determine a second antenna subarray from the N rows and M columns of radiating elements, wherein the second antenna subarray comprises X2 rows and Y2 columns of radiating elements, 1 ≤ X2 ≤ N, 1 ≤ Y2 ≤ M, and Y2 > X2; control a phase shift increment change of the second antenna subarray to generate a plurality of second beams, wherein different phase shift increments correspond to different second beams; determine a second aligned beam from the plurality of second beams based on a feedback from the receive end; and determine a beam direction range based on a direction range in which the first aligned beam intersects with the second aligned beam. determine a first antenna subarray from the N rows and M columns of radiating elements, wherein the first antenna subarray comprises X1 rows and Y1 columns of radiating elements, 1 ≤ X1 ≤ N, 1 ≤ Y1 ≤ M, and X1 > Y1; control a phase shift increment change of the first antenna subarray to generate a plurality of first beams, wherein different phase shift increments correspond to different first beams; and determine a first aligned beam from the plurality of first beams based on a feedback from a receive end; and the control unit is further configured to: determine a second antenna subarray from the N rows and M columns of radiating elements, wherein the second antenna subarray comprises X2 rows and Y2 columns of radiating elements, 1 ≤ X2 ≤ N, 1 ≤ Y2 ≤ M, and Y2 > X2; control a phase shift increment change of the second antenna subarray to generate a plurality of second beams, wherein different phase shift increments correspond to different second beams; determine a second aligned beam from the plurality of second beams based on a feedback from the receive end; and determine a beam direction range based on a direction range in which the first aligned beam intersects with the second aligned beam. determine a second antenna subarray from the N rows and M columns of radiating elements, wherein the second antenna subarray comprises X2 rows and Y2 columns of radiating elements, 1 ≤ X2 ≤ N, 1 ≤ Y2 ≤ M, and Y2 > X2; control a phase shift increment change of the second antenna subarray to generate a plurality of second beams, wherein different phase shift increments correspond to different second beams; determine a second aligned beam from the plurality of second beams based on a feedback from the receive end; and determine a beam direction range based on a direction range in which the first aligned beam intersects with the second aligned beam.