Raza Hasan, Koziel Slawomir, Szczepanski Stanislaw
Department of Engineering, Reykjavik University, 102 Reykjavík, Reykjavik, Iceland.
Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Gdansk, 80-233, Poland.
Sci Rep. 2025 Mar 11;15(1):8412. doi: 10.1038/s41598-025-91583-y.
This paper presents an 8 × 8-element slot antenna array optimized for 30 GHz band applications, achieving high gain, wide impedance bandwidth, and high efficiency. The array employs a pin/hole-based design, which enables a compact structure and reduces fabrication complexity and cost, as it eliminates the need for electrical contact between its three primary layers: the metal radiating slot plate, a sub-array cavity layer, and a ridge waveguide feed network layer. The corporate feed network is realized through an array of pins and guiding ridges integrated into a metal plate, effectively distributing power to the radiating elements. A double transition from ridge waveguide to rectangular waveguide, leading to a 2.92 mm coaxial connector, ensures efficient feeding. Each component, including the radiating elements, cavity layer, power dividers, and transitions, is designed and optimized to maintain a low reflection coefficient (|S| < -10 dB) across the 25-35 GHz frequency range. The 8 × 8 array is fabricated using standard milling techniques. The measured impedance matching bandwidth of approximately 33% is obtained, covering the entire 25-to-35 GHz range. The array consistently demonstrates a gain of over 23 dBi validating its performance for high-frequency applications.
本文介绍了一种针对30GHz频段应用进行优化的8×8元缝隙天线阵列，该阵列实现了高增益、宽阻抗带宽和高效率。该阵列采用基于引脚/孔的设计，这种设计能够实现紧凑的结构，降低制造复杂性和成本，因为它消除了其三个主要层（金属辐射缝隙板、子阵列腔层和脊波导馈电网络层）之间的电接触需求。公共馈电网络通过集成在金属板中的引脚和导向脊阵列实现，有效地将功率分配到辐射元件。从脊波导到矩形波导的双过渡，再连接到2.92mm同轴连接器，确保了高效馈电。每个组件，包括辐射元件、腔层、功率分配器和过渡部分，都经过设计和优化，以在25 - 35GHz频率范围内保持低反射系数（|S| < -10dB）。该8×8阵列采用标准铣削技术制造。获得了约33%的实测阻抗匹配带宽，覆盖了整个25至35GHz范围。该阵列始终表现出超过23dBi的增益，验证了其在高频应用中的性能。
