研究目的
To present a compact beam scanning flat antenna array with high gain based on the substrate integrated waveguide (SIW) and analyze its performance compared to traditional CTS arrays.
研究成果
The proposed SIW-CTS array has a 4dBi higher gain than the metal parallel waveguide CTS and achieves beam scanning by simply moving a small SIW-horn. The measured gain at the focal point is 20.6dBi with a side lobe level of -25.2dB at 13 GHz. The beam steers from -35° to 35° with the 3-dB gain decreasing. This design is suitable for next-generation Satcom terminals and mobile ground stations.
研究不足
The discrepancies between simulated and measured results are mainly caused by the experimental process, such as the inaccurate value of the substrate dielectric constant and the error of welding SIW-horn coaxial probe insertion height.
1：Experimental Design and Method Selection:
The design involves a SIW-CTS array with a new compact corporate-feed network consisting of a SIW horn and a flat lens. The flat lens converts the cylindrical wave-front to a planar wave-front for feeding the CTS array. The Taylor distribution of the feed level is used to achieve low sidelobe and high gain.
2：Sample Selection and Data Sources:
An 8-element array is designed, simulated, and fabricated to validate the design.
3：List of Experimental Equipment and Materials:
The array is constructed on three substrate layers with a dielectric constant of 2.65 and loss tangent of 0.
4：65 and loss tangent of Experimental Procedures and Operational Workflow:
001.
4. Experimental Procedures and Operational Workflow: The beam scanning is achieved by moving the SIW-horn along a straight line across the focal point of the lens. The performance is measured in an anechoic chamber.
5：Data Analysis Methods:
The reflection coefficients, gain patterns, and scanning angles are analyzed using simulation and measurement results.
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