Abstract: A planar millimeter-wave shared-aperture array antenna is proposed and designed in this paper. By composing the substrate integrated waveguide (SIW) and the stripline, the K-band antenna is embedded inside the Ka-band antenna to achieve a smaller size and a low profile by sharing an aperture. The Ka-band antenna radiates through the parallel slot pairs on the surface of the SIW cavities with horizontal polarization, while the K-band antenna radiates through the butterfly-shaped slots with vertical polarization, which are also designed on the surface. Then the two array antennas can radiate by sharing a common aperture with high isolation. To verify this idea, a prototype of an 8×8 shared-aperture array antenna has been designed with center frequencies of 19 and 30 GHz and fabricated using multilayer printed circuit board (PCB) technology. The measurement results show that the −10 dB impedance bandwidths in the K- and Ka-bands are 7.73% and >20%, and the corresponding isolations are higher than 60 and 44 dB, respectively. The proposed shared-aperture antenna has a small footprint, a low profile, and high isolation, and is a promising candidate to design compact millimeterwave wireless systems.

具有高隔离度的毫米波平面双极化共口径阵列天线

[1]Cheng YJ, Wang J, Liu XL, 2017. 94 GHz substrate integrated waveguide dual-circular-polarization shared-aperture parallel-plate long-slot array antenna with low sidelobe level. IEEE Trans Antenn Propag, 65(11):5855-5861.

[2]Ding YR, Cheng YJ, 2019. Ku/Ka dual-band dual-polarized shared-aperture beam-scanning antenna array with high isolation. IEEE Trans Antenn Propag, 67(4):2413-2422.

[3]Ferrando-Rocher M, Herranz-Herruzo JI, Valero-Nogueira A, et al., 2019. Full-metal K-Ka dual-band shared-aperture array antenna fed by combined ridge-groove gap waveguide. IEEE Antenn Wirel Propag Lett, 18(7):1463-1467.

[4]Guo ZJ, Hao ZC, Yin HY, et al., 2021. Planar shared-aperture array antenna with a high isolation for millimeter-wave low Earth orbit satellite communication system. IEEE Trans Antenn Propag, 69(11):7582-7592.

[5]Ho KMJ, Rebeiz GM, 2014. Dual-band circularly-polarized microstrip antenna for Ku/Ka band statellite communication arrays. Proc IEEE Antennas and Propagation Society Int Symp, p.1831-1832.

[6]Hong W, Yue GR, Ge XH, et al., 2021. High-throughput millimeter-wave wireless communications. Front Inform Technol Electron Eng, 22(4):437-440.

[7]Li D, Xu JG, Zhang B, et al., 2015. GCPW to stripline vertical transition for K-band applications in LTCC. Asia-Pacific Microwave Conference, p.1-3.

[8]Luo GQ, Hu ZF, Dong LX, et al., 2008. Planar slot antenna backed by substrate integrated waveguide cavity. IEEE Antenn Wirel Propag Lett, 7:236-239.

[9]Mao CX, Gao S, Wang Y, et al., 2017a. A shared-aperture dual-band dual-polarized filtering-antenna-array with improved frequency response. IEEE Trans Antenn Propag, 65(4):1836-1844.

[10]Mao CX, Gao S, Luo Q, et al., 2017b. Low-cost X/Ku/Ka-band dual-polarized array with shared aperture. IEEE Trans Antenn Propag, 65(7):3520-3527.

[11]Mao CX, Gao S, Wang Y, et al., 2017c. Dual-band circularly polarized shared-aperture array for C-/X-band satellite communications. IEEE Trans Antenn Propag, 65(10):5171-5178.

[12]Mukherjee S, 2017. Design of four-way substrate integrated coaxial line (SICL) power divider for K band applications. Proc IEEE MTT-S Int Microwave and RF Conf, p.1-4.

[13]Naishadham K, Li RL, Yang L, et al., 2013. A shared-aperture dual-band planar array with self-similar printed folded dipoles. IEEE Trans Antenn Propag, 61(2):606-613.

[14]Qi ZH, Li XP, Zhu H, 2021. Low-cost high-order-mode cavity backed slot array antenna using empty substrate integrated waveguide for the 5G n260 band. Front Inform Technol Electron Eng, 22(4):609-614.

[15]Smolders AB, Mestrom RMC, Reniers ACF, et al., 2013. A shared aperture dual-frequency circularly polarized micro

[16]strip array antenna. IEEE Antenn Wirel Propag Lett, 12:120-123.

[17]Tao MC, Wu YW, Hao ZC, 2021. Compact orthogonal multiple-beam antenna with shared aperture. IEEE Antenn Wirel Propag Lett, 20(6):873-877.

[18]Wang K, Liang XL, Zhu WR, et al., 2018. A dual-wideband dual-polarized aperture-shared patch antenna with high isolation. IEEE Antenn Wirel Propag Lett, 17(5):735-738.

[19]Xu J, Hong W, Jiang ZH, et al., 2020. Low-cost millimeter-wave circularly polarized planar integrated magneto-electric dipole and its arrays with low-profile feeding structures. IEEE Antenn Wirel Propag Lett, 19(8):1400-1404.

[20]Xu LM, Wan YT, Yu D, 2019. Research of dual-band dual circularly polarized wide-angle scanning phased array. Proc IEEE 2^nd Int Conf on Automation, Electronics and Electrical Engineering, p.22-25.

[21]Zhang JD, Wu W, Fang DG, 2016. Dual-band and dual-circularly polarized shared-aperture array antennas with single-layer substrate. IEEE Trans Antenn Propag, 64(1):109-116.

[22]Zhang JF, Cheng YJ, Ding YR, et al., 2019. A dual-band shared-aperture antenna with large frequency ratio, high aperture reuse efficiency, and high channel isolation. IEEE Trans Antenn Propag, 67(2):853-860.

[23]Zhang JF, Cheng YJ, Ding YR, 2020. An S- and V-band dual-polarized antenna based on dual-degenerate-mode feeder for large frequency ratio shared-aperture wireless applications. IEEE Trans Antenn Propag, 68(12):8127-8132.

[24]Zhang Y, Chen ZN, Qing XM, et al., 2011. Wideband millimeter-wave substrate integrated waveguide slotted narrow-wall fed cavity antennas. IEEE Trans Antenn Propag, 59(5):1488-1496.

[25]Zhao HD, Wang ZX, Meng HF, 2015. A design of E/Ka dual-band patch antenna array with shared aperture. Proc Asia-Pacific Microwave Conf, p.1-3.

[26]Zhou GN, Sun BH, Liang QY, et al., 2021. Triband dual-polarized shared-aperture antenna for 2G/3G/4G/5G base station applications. IEEE Trans Antenn Propag, 69(1):97-108.