科研之友
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摘要
This paper reports a novel wideband differential antenna based on metasurface. It consists of a differential slot coupled antenna and a planar metasurface. Planar metasurface is composed of 4x4 elements, and a rectangular slot is embedded on the ground plane to couple energy between the differential feeding lines and metasurface. The feeding line employs the three-line coupled lines which could provide wideband filter-integrated feature. The lower and upper resonant frequencies of the proposed antenna can be adjusted independently by tuning the distance of the metasurface units and the length of the rectangular slot in metallic ground, respectively. Moreover, a differential dielectric resonator antenna is simulated for performance comparison. It is concluded that the proposed antenna has many advantages, such as low profile (0.08(0) at 5GHz), frequency independent, high-gain, and symmetrical radiation pattern, comparing with the differential dielectric resonator antenna. Furthermore, a differential metasurface-based antenna prototype has been fabricated to experimentally validate the principle and design approach. The measured impedance bandwidth with odd mode reflection coefficient below -10dB is 19.35% from 4.76 to 5.78GHz. Meanwhile, the measured boresight gain at 5GHz is 6.4dB, and low cross-polarization level could be achieved.
- 出版日期2019-2
- 单位北京邮电大学
