Abstract
To improve the bandwidth, cross-polarization ratio (XPR) and gain of microstrip antenna, a compact single-point fed wideband circularly polarized (CP) 2 × 2 microstrip antenna array is proposed. CP radiation with bandwidth, gain, XPR of the array is improved by the rectangular patchs with truncated-corner and tilted rectangular slot perturbation, and the cooperation with sequential-phase (SP) feed network and metasurfaces (MTSs), effectively. Compactness of the array achieved by compact SP feed network. Finally, the overall size of the antenna array is 55.4 mm × 55.4 mm × 2.1 mm, and the measurement results show that the bandwidth of voltage standing-wave ratio less than 2 is 2.7 GHz, the 3 dB axial ratio (AR) bandwidth is 2.4 GHz, the average XPR is 15 dB, the 3 dB gain bandwidth is 2.6 GHz, and the peak gain is 9.9 dB at 6.3 GHz. The experimental results are in good agreement with the simulation results, which verifies the rationality of the design.
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Ming, C. Compact Wideband Microstrip Antenna Array Using Sequential-Phase Feed Network and Metasurfaces. Wireless Pers Commun 110, 563–572 (2020). https://doi.org/10.1007/s11277-019-06742-y
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DOI: https://doi.org/10.1007/s11277-019-06742-y