| Autor: |
Manh Tuan Nguyen, Alhaj Hasan, Adnan F., Gazizov, Talgat R. |
| Předmět: |
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| Zdroj: |
Microwave Review; Dec2024, Vol. 30 Issue 2, p60-70, 11p |
| Abstrakt: |
Reducing the antenna mass while maintaining its desired characteristics is associated with many challenges. The optimal current grid approximation and its modified versions provide the possibility of creating sparse antennas with controllable characteristic accuracy while considerably minimizing their mass compared to their original structure. However, for antennas operating in wide frequency bands, it is necessary to consider that the current distribution through the wires of the original grid will change as the frequency changes. This leads to different sparse structures after applying these approaches. This paper investigates and compares the performance of sparse antenna structures obtained at different frequencies in the antenna operating frequency range. Different approximations are applied on a horn antenna designed to operate in the K/Ka band. Its sparse structures obtained at 18, 28 and 38 GHz were used for the analysis. Detailed analysis of the performance and advantages of the sparse antennas obtained after applying these approximations is performed. The analysis results allow the selection of a suitable sparse structure for specific applications. In addition, this paper also verifies the conclusions drawn in previous work for a different frequency band regarding at which frequency in the considered band the sparse structure must be generated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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