Abstract: A 3D-printed dual-band dual-polarization gap waveguide (GWG) slot antenna array for Ku-band satellite communications (SATCOMs) is presented in this paper. Two stacked GWGs excite the quasi-TE₄₂₀ and quasi-TE₂₄₀ modes in the cavity respectively through orthogonal slots. An unequal power divider with a large power division ratio is proposed based on a ridge gap waveguide(RGW). Two power tapering distribution networks are realized for dual polarizations, and the sidelobe level (SLL) is suppressed. The antenna is fabricated in parts by direct metal laser sintering (DMLS), and the whole antenna is obtained by screw assembly. The measured impedance bandwidth well covers both the transmitting band (Tx, from 14 GHz to 14.5 GHz) and the receiving band (Rx, from 12.25 GHz to 12.75 GHz) required for Ku-band SATCOMs. Measurement results show that the maximum gain reaches 25.6 dBi, and the radiation efficiency of the dual-band is >72%.

用于Ku波段卫星通信的3D打印低旁瓣双频双极化阵列天线

[1]Akbari M, Farahbakhsh A, Sebak AR, 2019. Ridge gap waveguide multilevel sequential feeding network for high-gain circularly polarized array antenna. IEEE Trans Antenn Propag, 67(1):251-259.

[2]Chen M, Fang XC, Wang W, et al., 2020. Dual-band dual-polarized waveguide slot antenna for SAR applications. IEEE Antenn Wirel Propag Lett, 19(10):1719-1723.

[3]Cheng YJ, Tan FY, Zhou MM, et al., 2020. Dual-polarized wideband plate array antenna with high polarization isolation and low cross polarization for D-band high-capacity wireless application. IEEE Antenn Wirel Propag Lett, 19(12):2023-2027.

[4]Dimitrov KC, Lee Y, Min BW, et al., 2020. Circularly polarized T-shaped slot waveguide array antenna for satellite communications. IEEE Antenn Wirel Propag Lett, 19(2):317-321.

[5]Fenech H, Amos S, Tomatis A, et al., 2015. High throughput satellite systems: an analytical approach. IEEE Trans Aerosp Electr Syst, 51(1):192-202.

[6]Ferrando-Rocher M, Herranz-Herruzo JI, Valero-Nogueira A, et al., 2018. Single-layer circularly-polarized Ka-band antenna using gap waveguide technology. IEEE Trans Antenn Propag, 66(8):3837-3845.

[7]Ferrando-Rocher M, Herranz-Herruzo JI, Valero-Nogueira A, et al., 2019a. 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.

[8]Ferrando-Rocher M, Herranz-Herruzo JI, Valero-Nogueira A, et al., 2019b. 8×8 Ka-band dual-polarized array antenna based on gap waveguide technology. IEEE Trans Antenn Propag, 67(7):4579-4588.

[9]Garcia-Marin E, Sanchez-Olivares P, Masa-Campos JL, et al., 2021. Dual circularly polarized array antenna based on corporate feeding network in square waveguide technology. IEEE Trans Antenn Propag, 69(3):1763-1768.

[10]Huang GL, Zhou SG, Chio TH, et al., 2015. A low profile and low sidelobe wideband slot antenna array feb by an amplitude-tapering waveguide feed-network. IEEE Trans Antenn Propag, 63(1):419-423.

[11]Jiang X, Jia FX, Cao Y, et al., 2019. Ka-band 8×8 low-sidelobe slot antenna array using a 1-to-64 high-efficiency network designed by new printed RGW technology. IEEE Antenn Wirel Propag Lett, 18(6):1248-1252.

[12]Liu PY, Pedersen GF, Zhang S, 2022. Wideband low-sidelobe slot array antenna with compact tapering feeding network for E-band wireless communications. IEEE Trans Antenn Propag, 70(4):2676-2685.

[13]Lu YL, Shen SH, You Y, et al., 2023. Wideband dual linearly polarized hollow-waveguide septum antenna array for Ku-band satellite communications. IEEE Trans Antenn Propag, 71(3):2433-2442.

[14]Miura Y, Hirokawa J, Ando M, et al., 2011. Double-layer full-corporate-feed hollow-waveguide slot array antenna in the 60-GHz band. IEEE Trans Antenn Propag, 59(8):2844-2851.

[15]Ran JQ, Jin C, Zhang PY, et al., 2022. High-gain and low-loss dual-polarized antenna array with reduced sidelobe level based on gap waveguide at 28 GHz. IEEE Antenn Wirel Propag Lett, 21(5):1022-1026.

[16]Sun FQ, Li YJ, Wang JH, et al., 2022. A millimeter-wave wideband dual-polarized antenna array with 3-D-printed air-filled differential feeding cavities. IEEE Trans Antenn Propag, 70(2):1020-1032.

[17]Yang QL, Gao S, Luo Q, et al., 2021. A dual-polarized planar antenna array differentially-fed by orthomode transducer. IEEE Trans Antenn Propag, 69(5):2637-2647.

[18]You S, Ahn SC, Kim YS, et al., 2022. Asymmetric iris structures for dual-polarization waveguide slot arrays for E-band wireless backhaul systems. IEEE Trans Antenn Propag, 70(4):2633-2644.

[19]Yu L, Yang X, Zhang K, et al., 2023. Millimeter-wave dual-band dual-polarized shared-aperture antenna for satellite communication applications. IEEE MTT-S Int Wireless Symp, p.1-3.

[20]Zaman AU, Kildal PS, 2014. Wide-band slot antenna arrays with single-layer corporate-feed network in ridge gap waveguide technology. IEEE Trans Antenn Propag, 62(6):2992-3001.

[21]Zhang J, Li XP, Qi ZH, et al., 2022. Dual-band dual-polarization horn antenna array based on orthomode transducers with high isolation for satellite communication. IEEE Trans Antenn Propag, 70(10):9247-9259.

[22]Zhang JJ, Zhao DX, You XH, 2022. Analysis and design of a CMOS LNA with transformer-based integrated notch filter for Ku-band satellite communications. IEEE Trans Microw Theory Tech, 70(1):790-800.

[23]Zhao X, Tian BN, Yeo SP, et al., 2017. Low-profile broadband dual-polarized integrated patch subarray for X-band synthetic aperture radar payload on small satellite. IEEE Antenn Wirel Propag Lett, 16:1735-1738.