Design of Leaky Wave Antenna with Composite Right-/Left-Handed Transmission Line Structure for Circular Polarization Radiation
Design of Leaky Wave Antenna with Composite Right-/Left-Handed Transmission Line Structure for Circular Polarization Radiation
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DOI：
10.2528/pierc12082106
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发表时间：
2012-10
影响因子：
--
通讯作者：
M. Ishii;T. Fukusako;A. Alphones
中科院分区：
文献类型：
--
作者：
M. Ishii;T. Fukusako;A. Alphones
本文提出了一种由耦合数字间结构和电感短端组成的左/右复合传输线产生圆极化的设计方法。Ex和Ey分量分别由平行的桩和侧边产生。通过优化单元胞的尺寸，可以得到90相位差。此外，通过选择CRLH-TL在地面两侧的合适位置，得到了jExj和jEyj产生CP的合适幅度比。结果表明，当轴向比(AR) < 3dB时，测得的CP带宽为30.5%。利用该特性在左手（LH）和右手（RH）频段的特性，在2.58GHz和2.99GHz之间改变频率，可以获得主波束约30°的扫描角。此外，还讨论了CP生成的原理。
This paper presents a design procedure for the generation of circular polarization (CP) from the composite right/left handed (CRLH) transmission line (TL) with a coupled inter-digit structure and an inductive stub. The Ex and Ey components are generated from the parallel stubs and the flngers, respectively. The 90 - -phase difierence can be obtained by optimizing the dimension of the unit cell. In addition, the suitable amplitude ratio of jExj and jEyj for CP generation is obtained by selecting a suitable position of the CRLH-TL between both edges of the ground. As a result, a CP with a measured bandwidth of 30.5% for an axial ratio (AR) of < 3dB in the boresight direction is obtained. Using the behavior in both the left-handed (LH) and right-handed (RH) frequency regions, a scanning angle of the main beam of approximately 30 - can be obtained by varying the frequency between 2.58GHz and 2.99GHz. Furthermore, the principle of CP generation is discussed.