4D antenna array layout design

This article mainly discusses 4D Radar antenna array design .4D Millimeter wave radar antenna does not mean that this antenna has 4 Dimensions , But from the perspective of target characteristics , The detected target has physical space 3 Dimensions + spectrum 1 Characteristics of dimensions .

And the antenna design is related to the azimuth and elevation , Former 3D The on-board radar has no pitching direction , therefore 4D Than 3D There is more information about the pitching direction .

The indexes of vehicle mounted millimeter wave radar antenna array include ：

• Antenna field angle FoV
• Angular resolution
• The range of angle measurement is not blurred
• Angle measurement accuracy
• Angular measurement robustness

These indicators restrict each other , And the actual effect and waveform of the index 、DOA Algorithm 、 Hardware design 、 Manufacturing process related . Different application requirements , The design requirements will vary slightly . therefore , Antenna design pursues the most suitable and reasonable , Not the most perfect .

1  Array layout

Based on vehicle mounted millimeter wave radar 3D-FFT Handle , Then in the pitching dimension, we can easily associate 4D-FFT, The use of MIMO Generation of radar virtual aperture technology VAA（Virtual Antenna Array） It must also be a uniform array , So there are the following two design schemes of transceiver array （Jan Mietzner Etc ）.

programme 1：                                                                  programme 2：