研究目的
To propose a novel design concept of multimode filtering antenna by integrating a multimode resonator and an antenna for achieving a compact size and high performance in terms of broad bandwidth, high-frequency selectivity and out-of-band rejection.
研究成果
The proposed design concept of integrating dual-mode resonator in a low-profile patch antenna improves the bandwidth and frequency selectivity. The realized array achieved a 10% impedance matching bandwidth and much enhanced frequency selectivity. This highly integrated design has the advantages of more compact size, wider bandwidth, increased frequency selectivity, and flatter gain response.
研究不足
The thickness of the whole module is 2.338 mm with two substrates, which is much lower than the previous work, but the backward radiation patterns show more deviation from the simulation due to a limitation from the measurement system.
1：Experimental Design and Method Selection:
The design integrates a multimode resonator and an antenna, employing the stub-loaded resonator (SLR) as the feed of the antenna. The resonant characteristics of SLR and patch as well as the coupling between them are studied.
2：Sample Selection and Data Sources:
A 2 × 2 array at C-band is designed and fabricated. Rogers 4003 substrates with a dielectric constant of
3：55 and loss tangent of 0027 is used in the design. List of Experimental Equipment and Materials:
The SLR is printed on the bottom layer of the lower substrate with a thickness of
4：813 mm and the patch is printed on the top layer of the upper substrate with a thickness of 525 mm. Experimental Procedures and Operational Workflow:
The SLR is coupled with the patch through a slot in the ground plane. The dimension of the square patch lpatch is about half wavelength at the operating frequency.
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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