异面带状线馈电的宽带双极化蝶形天线

发布时间：2018-08-17 13:02

【摘要】：针对通信与雷达系统对双极化与宽带天线的要求,提出了一种基于带状线馈电的双极化蝶形天线。通过两对互相正交的蝶形阵子实现了天线的双极化,并采用一种新型的微带线转异面带状线的巴伦给两对正交蝶形阵子平衡馈电。异面带状线为平衡传输线,满足了蝶形阵子对于平衡馈电的要求。在馈电点处由同轴线对微带线馈电,经渐变微带线转化为异面带状线,最后由两组异面带状线给两对正交蝶形阵子馈电。测得该天线实现了69.23%的阻抗带宽,在6.8~14GHz频带内电压驻波比(VSWR)小于2。为使天线单向辐射且改善天线增益,将天线放置于反射吸收腔内。测得天线在6.8~18GHz的频宽内VSWR基本小于3,天线增益在8~12GHz频带内大于0.11dB,天线前后瓣比大于15dB。因此,所提出的双极化蝶形天线可用于宽带通信系统中。
[Abstract]:In order to meet the requirements of dual polarization antenna and broadband antenna in communication and radar systems, a double polarized butterfly antenna based on strip line feed is proposed. The dual polarization of the antenna is realized by two pairs of mutually orthogonal butterfly arrays, and a new type of microstrip line is used to balance the feed to the two pairs of orthogonal sphenoid matrices by using a new type of microstrip line turning into a different plane strip line. The off-plane strip line is a balanced transmission line, which meets the requirements of the butterfly phase for the balanced feed. At the feeding point, the microstrip line is fed by coaxial line, then transformed into the hetero-plane strip line through the gradual change of the microstrip line. Finally, two pairs of cross-sphenoid arrays are fed by two sets of hetero-planar strip lines. The impedance bandwidth of the antenna is 69.23%, and the VSWR (VSWR) is less than 2. 3% in the 6.8~14GHz band. In order to make the antenna radiate in one direction and improve the antenna gain, the antenna is placed in the reflection absorption cavity. The antenna VSWR is less than 3 in the bandwidth of 6.8~18GHz, the antenna gain is greater than 0.11dB in the 8~12GHz band, and the back and back lobe ratio of the antenna is more than 15 dB. Therefore, the proposed dual-polarization butterfly antenna can be used in broadband communication systems.
【作者单位】：哈尔滨工业大学电子与信息工程学院;毫米波国家重点实验室;
【基金】：国家自然科学基金项目(61171181) 毫米波国家重点实验室开放课题(K201328)
【分类号】：TN823

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