研究目的
To present a substrate integrated waveguide (SIW) based leaky wave antenna with wide beam scanning to mitigate open stopband (OSB).
研究成果
The proposed antenna achieves continuous beam scanning from -49° to +69° with suppressed OSB, wide impedance bandwidth of 56%, maximum gain of 14.2 dBi, and low cross-polarization, demonstrating effectiveness for applications requiring wide scanning range.
研究不足
Potential variations in fabrication and connector reflections may affect measured results, and the design is specific to SIW structures.
1：Experimental Design and Method Selection:
The antenna design involves a periodic SIW structure with unit cells containing a longitudinal slot and an inductive post placed oppositely offset from the center line. An equivalent circuit model is developed to explain impedance matching for OSB suppression, and dispersion diagrams are used for analysis.
2：Sample Selection and Data Sources:
A prototype antenna is fabricated and measured, with simulations performed using HFSS software.
3：List of Experimental Equipment and Materials:
Substrate RO4350 (εr=
4：66, tanδ=004), SMA connectors, and fabrication tools. Experimental Procedures and Operational Workflow:
The antenna is designed, optimized in HFSS, prototyped, and S-parameters and radiation patterns are measured.
5：Data Analysis Methods:
S-parameters, gain, beam direction, and cross-polarization levels are analyzed from simulations and measurements.
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