研究目的
To design a compact antipodal Vivaldi antenna (AVA) with regular rectangular slots in the taper region for electronic warfare applications, achieving a small aperture size of 25 mm and covering a frequency range of 6 to 18 GHz with a return loss of less than ?10 dB.
研究成果
A compact Unbalanced Antipodal Vivaldi antenna (UAVA) with an aperture width of 25 mm covering 6 to 18 GHz has been successfully designed and realized. The antenna features linear flare with elliptical ends and rectangular slots to maximize bandwidth, achieving a return loss below ?10 dB over the desired frequency range. The antenna is suitable for electronic warfare applications due to its compact size and satisfactory radiation patterns.
研究不足
The design becomes more challenging and complex as the width of the aperture is reduced. The primary limitation is achieving a small aperture size while maintaining performance over a wide frequency range.
1：Experimental Design and Method Selection:
The antenna design was optimized using Ansoft HFSS software for operation over 6 to 18 GHz. The design includes rectangular slots at regular intervals and terminal elliptical shaping of taper on top and bottom layers of the antenna substrate to enhance impedance bandwidth and gain.
2：Sample Selection and Data Sources:
The antenna was fabricated on an RT Duroid 5880 substrate with a dielectric constant of 2.2 and a thickness of 1.6 mm.
3：2 and a thickness of 6 mm.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Ansoft HFSS software for simulations, RT Duroid 5880 substrate, and standard SMA connector for input.
4：Experimental Procedures and Operational Workflow:
The antenna was designed with microstrip line feeding, and the effect of various parameters like slot loading, length of flare, slot width, and radius of the circular portion of the feed was studied through simulations.
5：Data Analysis Methods:
The return loss, radiation patterns, and gain were measured and analyzed to validate the design.
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