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https://doi.org/10.1109/ACCESS.2020.3002224
Title: | Improvement of Radiation Efficiency for Frequency Beam-Scanning Antennas Using a Subarray Topology | Authors: | Chu, H. Zhu, X.-H. Hong, H. Guo, Y.-X. |
Keywords: | Frequency beam-scanning magneto-electric-dipole microstrip-to-stripline radiation efficiency subarray topology |
Issue Date: | 2020 | Publisher: | Institute of Electrical and Electronics Engineers Inc. | Citation: | Chu, H., Zhu, X.-H., Hong, H., Guo, Y.-X. (2020). Improvement of Radiation Efficiency for Frequency Beam-Scanning Antennas Using a Subarray Topology. IEEE Access 8 : 109429-109439. ScholarBank@NUS Repository. https://doi.org/10.1109/ACCESS.2020.3002224 | Abstract: | In this paper, a new approach is proposed to improve the radiation efficiency of a frequency beam-scanning antenna. In this proposed approach, the entire antenna is divided into two subarrays and each subarray includes one primary slow-wave line. Parameters of these two primary slow-wave lines are identical to each other, to achieve identical progressive phase difference between elements within either subarray. Meanwhile, a secondary slow-wave line is designed and connected to the beginning of one of the two primary slow-wave lines, to introduce an additional phase difference between these two subarrays. The above setup provides more flexibility for the allocation of phase-delay units and thus enables a possibility to reduce the overall length and transmission loss of the slow-wave line utilized in a frequency beam-scanning array, which leads to a better radiation efficiency. In order to demonstrate the above topology, a novel microstrip-to-stripline power-divider and a novel broadband magneto-electric dipole element are proposed in multilayer configurations, for the realization of a 20-element prototype centered at 8.75 GHz. A reduction of 29.2% is achieved for the overall loss compared to a conventional array when achieving a scanning range of ±30°. © 2013 IEEE. | Source Title: | IEEE Access | URI: | https://scholarbank.nus.edu.sg/handle/10635/197804 | ISSN: | 21693536 | DOI: | 10.1109/ACCESS.2020.3002224 |
Appears in Collections: | Staff Publications Elements |
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