In view of the narrow band and low gain in the traditional microstrip antenna, by etching flower gaps and cross strip-line gaps on the radiation patch and ground plane, respectively, a broadband and directional microstrip antenna based on metamaterials is designed and fabricated. A capacitive-inductive (C-L) equivalent circuit is produced between the patterned metal patch and the ground plane, and changes the radiation direction of the antenna electromagnetic field. The direction of the antenna radiation electromagnetic field is mainly concentrated in the horizontal -x direction rather than the vertical direction traditional microstrip antenna. Compared with the traditional microstrip antenna, the performance of the designed antenna is obviously improved. The simulation results show that the working bandwidth of the antenna is 3.5~11.6 GHz (it is 23.8 times wider than the traditional microstrip antenna), the relative bandwidth is 107.3%. The voltage standing wave ratio (VSWR) of the antenna is less than 2 in the whole frequency band and the gain is greater than 5dB. The measured result shows that the working bandwidth of the fabricated antenna is 2.82~12.69 GHz (it is 1.22 times wider than the simulation one), the relative bandwidth is 127.3%.The designed antenna can be widely used in missile borne antenna, gun pointing radar, satellite communication network, automobile radar and so on.
LIU Min
,
ZHANG Binzhen
,
DUAN Junping
. Broadband and Directional Microstrip Antenna Based on Metamaterials[J]. Journal of Mechanical Engineering, 2018
, 54(9)
: 64
-68
.
DOI: 10.3901/JME.2018.09.064
[1] LIN F H, CHEN Z N. Low-profile wideband metasurface antennas using characteristic mode analysis[J]. IEEE Transactions on Antennas & Propagation, 2017, 6(54):1706-1713.
[2] MEI Q Q, WEN X T, HUI F M, et al. Suppressing side-lobe radiations of horn antenna by loading metamaterial lens[J]. Scientific Reports, 2015, 5:9113.
[3] DASH R K, SAHU S K, MISHRA C S, et al. Realization of ‘non-linear invisibility cloak’ using meta-material[J]. Optik-International Journal for Light and Electron Optics, 2016, 127(20):9635-9639.
[4] ELASSY K S, RAFAT N H, KHEDR M E, et al. Fundamentals of designing cylindrical high-order transformation optics invisibility cloaks using silver-silica metamaterials[J]. Applied Physics A, 2014, 115(2):531-539.
[5] LIU G C, LI C, FANG G Y. Experimental demonstration of an invisible cloak with irregular shape by using tensor transmission line metamaterials[J]. Chinese Physics B, 2015, 24(1):247-252.
[6] HAIMAN Z. The electromagnetic chirp of a compact binary black hole:A phase template for the gravitational wave inspiral[J]. Physical Review D, 2017, 9(26):1-8.
[7] PARK S B, EOM S Y. Printed cross-dipole antenna with slow-wave structure for highly efficient and directive WLAN applications[J]. Electronics Letters, 2017, 53(13):826-828.
[8] ZIOLKOWSKI R W, KIPPLE A D. Application of double negative materials to increase the power radiated by electrically small antennas[J]. IEEE Transactions on Antennas & Propagation, 2003, 51(10):2626-2640.
[9] ABEDIN M F, ALI M. Effects of a smaller unit cell planar EBG structure on the mutual coupling of a printed dipole array[J]. IEEE Antennas & Wireless Propagation Letters, 2005, 4:274-276.
[10] SHI B. S-wave band microstrip antenna with perfect absorbing metamaterial substrate[J]. Acta Physica Sinica, 2011, 60(1):139-157.
[11] ZHAO Y, CAO X Y, ZHANG D, et al. Design of high-gain broadband low-RCS waveguide slot antenna[J]. Acta Physica Sinica, 2014, 63(3):168-175.
[12] LI L W, LI Y N, YEO T S, et al. A broadband and high-gain metamaerial microstrip antenna[J]. Applied Physics Letters, 2010, 96(16):211.
[13] LIU T, CAO X Y, GAO J, et al. Design of miniaturized broadband and high gain metamaterial patch antenna[J]. Journal of Xidian University, 2011, 53(12):2858-2861.
