Chen Boju, Chen Xiaoming, Cheng Xin, Da Yiran, Liu Xiaobo, Gao Steven, Kishk Ahmed A
School of Information and Communications Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong 999077, China.
Sensors (Basel). 2024 Aug 7;24(16):5117. doi: 10.3390/s24165117.
A dual-band (K-/Ka-band) antenna array is presented. An ultra-wideband antenna element in the shape of a double-ridged waveguide is used as a radiation slot, and a novel dual-periodic ridge gap waveguide (RGW) with an interdigital-pin bed of nails (serving as a filter) is used to realize dual-band operation. By periodically arranging the pins of two different heights in two dimensions, the proposed RGW with interdigital-pin bed of nails is able to realize and flexibly adjust two passbands. The widely used GW-based back cavity boosts the realized gain and simplifies the feed network design. A 4 × 4 prototype array was designed, fabricated, and measured. The results show that the array has two operating bands at 24.5-26.4 GHz and 30.3-31.5 GHz, and the realized gain can reach 19.2 dBi and 20.4 dBi, respectively. Meanwhile, there is a very significant gain attenuation at stopband.
本文提出了一种双频段（K频段/Ka频段）天线阵列。采用双脊波导形状的超宽带天线单元作为辐射缝隙，并使用一种带有叉指式钉床（用作滤波器）的新型双周期脊形缝隙波导（RGW）来实现双频段工作。通过在二维空间中周期性地排列两种不同高度的引脚，所提出的带有叉指式钉床的RGW能够实现并灵活调整两个通带。广泛使用的基于缝隙波导的背腔提高了实现的增益并简化了馈电网络设计。设计、制作并测量了一个4×4的原型阵列。结果表明，该阵列在24.5 - 26.4 GHz和30.3 - 31.5 GHz有两个工作频段，实现的增益分别可达19.2 dBi和20.4 dBi。同时，在阻带处有非常显著的增益衰减。
