论文名称为“Dual-Band Shared-Aperture Two-Dimensional Phased Array Antenna With Wide Bandwidth of 25.0% and 11.4% at Ku- and Ka-Band”。该工作提出了一种Ku / Ka波段共口径二维相控阵天线。该天线由8×8 Ku波段垂直极化偶极子天线阵列和8×8 Ka波段水平极化波导天线阵列组成。对于双波段共口径雷达系统，主要的挑战是在保持高频段优异辐射性能的同时，实现低频段宽角度波束覆盖。例如，Ku波段25%的相对带宽和Ka波段11.4%的相对带宽是这项工作所必需的。为了同时满足宽频带和宽波束覆盖的要求，采用了宽带宽角辐射单元。在这种情况下，Ku波段天线的宽带特性使得该共口径天线阵在高频段存在寄生模式，扫描过程中会引发出Ka波段的盲区。因此，需要通过适当调整Ku波段天线单元来消除盲区。最终，在E面和H面分别可实现±60°@14 GHz、±50°@16 GHz、±35°@18 GHz、±40°@33 GHz、±40°@35 GHz和±35°@37 GHz的扫描角度。工作的主要完成人为丁嫣然、程钰间、孙建旭、王磊、李廷军。

论文链接：https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9701877

Abstract— A Ku-/Ka-band shared-aperture 2-D phased array 2 antenna is proposed in this article. The antenna consists of an 3 8 × 8 Ku-band vertical-polarized dipole antenna array fed by 4 a microstrip line to strip line transition and an 8 × 8 Ka-band 5 horizontal-polarized waveguide antenna array fed by a microstrip 6 line to substrate integrated waveguide (SIW) to fin line transition, 7 which can be used to connect with T/R modules. For a dual-band 8 radar system, the main challenge is to realize the shared-aperture 9 array antenna having the wideband wide angle in the lower band 10 and well-performed in the higher band. For example, the relative 11 bandwidths of 25% in the Ku-band and 11.4% in the Ka-band 12 are necessary for this work. The bandwidth of both bands is 13 wider than that of existing works. To satisfy the wideband and 14 wide beam coverage in two dimensions simultaneously, wideband 15 radiating elements for both two bands are used. In this case, 16 due to the wideband Ku-band radiator, the blind area in the 17 Ka-band appears within the scanning process because of the 18 parasitic mode, which should be eliminated by properly adjusting the Ku-band radiator. After that, the scanning angles of ±60◦ 19 at 14 GHz, ±50◦ at 16 GHz, and ±35◦ at 18 GHz, and ±40◦ 20 at 33 GHz, ±40◦ at 35 GHz, and ±35◦ 21 at 37 GHz can be achieved in 22 both E- and H-planes, respectively. Each Ku-band linear array is 23 tightly inserted into its two adjacent Ka-band linear arrays along 24 the wide side of the Ka-band element. Thanks to the extremely 25 thin Ku-band endfire dipole antenna, the radiating aperture size 26 of the Ka-band array keeps unchanged after adding the Ku-band 27 radiators. The proposed antenna concept has been validated well 28 by the experimental results.

Index Terms— 2-D beam scan, dual-band, shared-aperture 30 antenna, wideband