研究目的
To design and characterize an on-board 4x2 corporate-fed differential patch array at 79 GHz for single-channel radar applications.
研究成果
A differential corporate-fed 4x2 patch antenna array was successfully designed and characterized at 79 GHz, achieving a peak gain of more than 14 dBi with a simulated efficiency over 60%. The array's compact size and differential interface make it suitable for single-channel radar applications.
研究不足
The slight difference in simulated and realized measured gain is due to alignment imperfection in the measurement setup.
1：Experimental Design and Method Selection:
The design involves creating a differential patch array based on two single-ended 4x1 arrays, utilizing T-junctions for power division and quarter-wavelength impedance transformers for matching.
2：Sample Selection and Data Sources:
The array is fabricated on Rogers RO3003 substrate, characterized by its permittivity at 77 GHz.
3：List of Experimental Equipment and Materials:
Includes Rogers RO3003 PCB substrate, differential microstrip-to-waveguide transition, and measurement equipment like Keysight’s E8257D signal generator and R&S FSV30 spectrum analyzer.
4：Experimental Procedures and Operational Workflow:
The array's performance is measured in an anechoic chamber, comparing received power levels to a reference horn antenna to calculate gain.
5：Data Analysis Methods:
The gain is calculated using Friis equation, accounting for the loss of the waveguide transition.
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