Design and Simulation of 77GHz Substrate Integrated Waveguide Slot Array Antenna
Keywords:
Automotive radars, feeding network, slot array antenna, substrate integrated waveguide (SIW)Abstract
In this paper, a 77GHz slot array antenna for millimeter-wave automotive radar application is designed and simulated using HFSS, in which the substrate integrated waveguide (SIW) is adopted. First, a linear array with 16 slots is designed, and its parameters are achieved by extracting the characteristics of the radiating slot in the array environment and comparing them with the array synthesis result. Then, a tree-shaped unequal feeding network with improved vertical transition is presented to make the entire array more compact. Finally, the configuration of the designed 8 × 16 planar array antenna is given, and the fabrication error is analyzed. The simulation results of the 77GHz SIW slot array antenna show that its sidelobe levels (SLLs) are below -25dB in the E-plane and below -27dB in the H-plane, and the corresponding half-power beamwidths are 13.9° and 9.7°, respectively.
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References
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