ABSTRACT

In this letter, a new wideband circularly polarized (CP) slot – microstrip patch antenna (SPMA) is elaborated. The proposed antenna consists of four crown patches as parasitic patches, an L-shaped crown slot etched into the ground plane as a parasitic slot, and a circular loop sequential rotating feeding structure (SRFS) as a driven element. First, four crown patches are used to stimulate a CP resonance. Second, the L-shaped crown slot is applied to excite an additional CP resonance. After that, the CP bandwidth of the antenna could be enhanced by combining these CP resonant modes. The measured results demonstrate that the antenna features a wide CPBW of 14.8% (5.30–6.15, 5.725 GHz), which has a potential application value in the WIFI (5.85–5.925 GHz) bands and the wireless local area network ITS (5.8 GHz) and (5.725–5.85 GHz).

摘要

在这封信中，阐述了一种新的宽带圆极化 (CP) 槽——微带贴片天线 (SPMA)。所提出的天线由四个作为寄生贴片的冠贴片、一个蚀刻在地平面中作为寄生槽的 L 形冠槽和一个作为驱动元件的圆环顺序旋转馈电结构 (SRFS) 组成。首先，使用四个冠贴片来激发 CP 共振。其次，应用 L 形冠槽来激发额外的 CP 共振。之后，可以通过组合这些 CP 谐振模式来增强天线的 CP 带宽。实测结果表明，该天线具有14.8%（5.30~6.15，5.725 GHz）的宽CPBW，在WIFI（5.85~5.925 GHz）频段和无线局域网ITS（5.8 GHz）具有潜在的应用价值。和（5.725–5.85 GHz）。