论文名称为：“Low-Sidelobe-Level Circularly Polarized Short Leaky-Wave Antenna With A-Shaped Element Based on Substrate Integrated Image Guide”本文提出了一种基于基片集成镜像介质波导（SIIG）的低副瓣圆极化漏波天线。A型圆极化辐射单元由水平线性极化结构和垂直线极化结构组成。水平极化波和垂直极化波可以分别由一对倾斜的横向金属带贴片和纵向金属带贴片激励。它们的相位是正交的，振幅可以通过调整水平极化结构的倾斜角度和垂直极化结构的长度来控制其相等。此外，将纵向金属条形贴片修改为V形条形贴片，可以实现场抵消，从而实现这种漏波天线的侧射。此外，通过控制口径场分布以获得期望的振幅分布，实现低副瓣，同时实现相对较小的轴比。此外，由于SIIG的波导波长较短，该馈线可用于实现小的单元间距和单元尺寸，从而实现阵列的小型化。在14 GHz的中心频率下，该天线的测量增益为12.3 dBic，副瓣电平为–19.1 dB，效率为92.3%。工作的主要完成人为张轶、程钰间、吴亚飞、樊勇。

论文链接：https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9613792

Abstract—In this letter, a low-sidelobe-level (SLL) circularly polarized (CP) leaky-wave antenna with A-shaped elements is proposed based on substrate integrated image guide (SIIG). The A-shaped CP radiating element consists of a horizontal linearly polarized (LP) structure and a vertical LP structure. The horizontal LP wave and the vertical LP wave can be excited by a pair of inclined transversal metal strip patches and a longitudinal metal strip patch, respectively. Their phases are orthogonal and amplitudes can be controlled to be equal by adjusting the tilted angle of the horizontal LP structure and the length of the vertical LP structure. Moreover, the longitudinal metal strip patch is modified to the V-shaped strip patch, which can realize the field cancellation, thereby achieving the boresight radiation for such a leaky-wave antenna. Furthermore, a low SLL is realized by controlling the aperture-field distribution to obtain the desired amplitude distribution and the relatively small axial ratio. In addition, because of the short waveguide wavelength of the SIIG, this feedline can be used to achieve the small interelement spacing and element size, thereby realizing the short length of the array. The measured peak gain of this antenna is 12.3 dBic, the SLL is –19.1 dB and the efficiency is 92.3% at the center frequency of 14 GHz.

 Index Terms—Boresight radiation, leaky-wave antenna, low sidelobe level (SLL), substrate integrated image guide (SIIG).