加载渐变周期结构的Vivaldi 天线

为提高原始Vivaldi 天线在工作带宽内的增益,设计了一种加载渐变周期结构的Vivaldi 天线。渐变周期结构是等距周期排列的金属贴片,电磁能量通过激励振子向引向振子方向传输,从而提高天线增益。仿真结果表明,加载周期结构的Vivaldi 天线在6 ~16 GHz 频段范围内增益提高2. 1 dB。Vivaldi 天线通过采用对称周期结构进行再优化,天线在12 ~14 GHz 频段范围内,S11 参数最大陷波深度提高8. 7 dB,增益提高1. 6 dB。最后对天线进行实物加工并测试,结果验证了设计的有效性。

Vivaldi Antenna Loaded with Gradual Period Structure

The paper designs a Vivaldi antenna with a gradient period structure in order to improve the gain of the original Vivaldi antenna in the working band. The gradual periodic structure is a metal patch arranged in an equidistant period, and the electromagnetic energy is transmitted to the direction of the vibrator by exciting the vibrator, thereby improving the antenna gain. The simulation results show that the gain of the Vivaldi antenna loaded with structure increases by 2. 1 dB in the range of 6 ~16 GHz. Vivaldi antenna is re-optimized by using a symmetric periodic structure. The S11 parameter has a maximum notch depth of 8. 7 dB and the gain is increased a value of 1. 6 dB in the range of 12 ~14 GHz. Finally, the antenna is physically processed and tested, and the results verify the effectiveness of the design.