研究目的
Investigating the integration of a multimode resonator and an antenna to achieve a compact size and high performance in terms of broad bandwidth, high-frequency selectivity, and out-of-band rejection for space-borne synthetic aperture radar (SAR) and wireless communication applications.
研究成果
The integrated design of a dual-mode resonator in a low-profile patch antenna improves the bandwidth and frequency selectivity. The 2 × 2 dual polarization SLR-fed antenna array achieved a 10% impedance matching bandwidth and much enhanced frequency selectivity. This concept can be extended to larger-size dual-polarized arrays such as 4 × 4 or 16 × 16 arrays.
研究不足
The study focuses on a 2 × 2 antenna array at C-band, and the performance in larger arrays or different frequency bands is not explored. The fabrication errors may cause small differences between the simulated and measured results.
1：Experimental Design and Method Selection:
The study employs a novel design method using the stub-loaded resonator (SLR) as the feed of the antenna, integrating a multimode resonator and an antenna for broadband performance with a low profile.
2：Sample Selection and Data Sources:
A 2 × 2 antenna array at C-band is designed and fabricated to verify the design concept.
3：List of Experimental Equipment and Materials:
Rogers 4003 substrates with a dielectric constant of 3.55 and loss tangent of 0.0027 are used in the design.
4：55 and loss tangent of 0027 are used in the design.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The SLR is coupled with the patch through a slot in the ground plane. The resonant characteristics of SLR and patch as well as the coupling between them are studied.
5：Data Analysis Methods:
The simulated and measured results are compared to demonstrate the performance in terms of impedance bandwidth, frequency selectivity, isolation, radiation pattern, and antenna gain.
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