研究目的
Investigating the design and performance of a planar substrate integrated waveguide (SIW) based cavity-backed self-triplexing slot antenna for X-Ku band applications.
研究成果
The proposed self-triplexing antenna is realized by single-layer PCB using QCs along with three different lengths of slots excited by three individual microstrip feed lines. The antenna integrated with three radiated QCs to produce a triple band of resonances at 11.01, 12.15, and 13.1 GHz with a minimum gain of 5 dBi at all triple frequencies with unidirectional radiation pattern. These radiated QCs are combined with three different lengths of slots and maintain good isolation more than 26 dB among ports. Moreover, the proposed antenna has features such as low cost, small size, easy to fabricate and planar in nature, which indicate that there is no slot in a ground plane as back-side of the antenna.
研究不足
The simulated radiation efficiency of the proposed antenna is low due to microstrip feeding lines, conductor and dielectric losses. The measured gain is also low because of the small radiation aperture in integrated QCs into the SIW cavity.
1：Experimental Design and Method Selection:
The antenna design involves the SIW cavity, radiating slots, and feeding networks. The radiating slots are etched on the upper metallic plane of the SIW, backed by three radiated quarter cavities (QCs). The slots are of different lengths and excited by three separated orthogonal feed lines to resonate at three different frequencies.
2：Sample Selection and Data Sources:
The antenna is realized on PCB with a single layer of substrate Rogers RT/Duroid 5880 with specific dielectric constant, thickness, and loss tangent.
3：List of Experimental Equipment and Materials:
The antenna is fabricated and measured using a vector network analyzer (VNA) Agilent TN5247A.
4：7A.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The antenna parameters are fine-tuned to achieve an intrinsic input port isolation of better than 26 dB. The behaviors of individual cavity modes at three resonant frequencies are analyzed using Z-parameters.
5：Data Analysis Methods:
The performance of the antenna is evaluated based on simulated and measured results, including |S|-parameters, radiation patterns, and gain.
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