[6] [6] MAHA LAKSHMI N V K, SUBBAIAH P V, PRASAD A M. Conformal antennas: A short survey［M］. Lecture notes in electrical engineering. Singapore: Springer Singapore, 2018: 881-888.

[7] [7] JOSEFSSON L, PERSSON P. Conformal array antenna theory and design［M］. New Jersey: Wiley, 2006.

[10] [10] THAKAR C M, PARKHE S S, JAIN A, et al. 3D Printing: Basic principles and applications[J]. Materials Today: Proceedings, 2022, 51: 842-849.

[11] [11] CHUA C K, LEONG K F. 3D printing and additive manufacturing: Principles and applications fifth edition of rapid prototyping［M］. Singapore: World Scientific, 2016.

[15] [15] MITRA D, ROY S, STRIKER R, et al. Conductive electrifi and nonconductive NinjaFlex filaments based flexible microstrip antenna for changing conformal surface applications[J]. Electronics, 2021, 10(7): 821.

[16] [16] ADAMS J J, DUOSS E B, MALKOWSKI T F, et al. Conformal printing of electrically small antennas on three-dimensional surfaces[J]. Advanced Materials (Deerfield Beach, Fla), 2011, 23(11): 1335-1340.

[17] [17] SUBBARAMAN H, PHAM D T, XU X C, et al. Inkjet-printed two-dimensional phased-array antenna on a flexible substrate[J]. IEEE Antennas and Wireless Propagation Letters, 2013, 12: 170-173.

[18] [18] LI Z, HUANG J, YANG Y P, et al. Additive manufacturing of conformal microstrip antenna using piezoelectric nozzle array[J]. Applied Sciences, 2020, 10(9): 3082.