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By: JinGyong Jong, CholHae Ho, MyongSu Song, UnChol Kim, and Yong CholChoe.
1 Assistant Professor, Department of Physical Engineering, Kim Chaek University of Technology, Kyogu-dong, Central District, Pyongyang, DPR Korea
This study presents the design and fabrication of a Ku-band patch antenna that achieves right-hand circular polarization (RHCP) with an enhanced axial ratio (AR) bandwidth. The proposed antenna consists of two circular split ring resonators(SRRs) and a T-shaped feedline. To achieve circular polarization, circular split ring resonators were placed symmetrically at both ends of the T-shaped feedline. The proposed antenna has been carefully designed and simulated using the CST Microwave Studio (MWS) simulator to validate its performance. A detailed comparison between the simulated and experimental analyses reveals a strong level of consistency, indicating the reliability of the design process. The antenna demonstrates an impedance bandwidth of approximately 3.57%, ranging from 13.75 GHz to 14.25 GHz, which confirms its capability to operate efficiently within the targeted frequency range. Furthermore, the design achieves an axial ratio (AR) of less than 2.5 dB across the entire operating bandwidth, thereby ensuring effective circular polarization performance. Another notable feature of the antenna is its gain, which consistently remains greater than 7.2 dB throughout the specified frequency band, making it suitable for high-performance communication applications. The overall compactness of the structure, with physical dimensions of just 33 mm × 21 mm, highlights the antenna’s efficiency and practical applicability for modern wireless systems.
circularly polarized, axial ratio, split ring resonator, patch antenna
Citation:
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