Within the present article, an original inexpensive UWB-modified elliptic antenna including slots in its ground plane is presented. This antenna with the FR4-epoxy substrate has a very modest size of 21 × 24 × 1.6mm³. The measured results confirm that the suggested antenna has an impedance bandwidth (|S₁₁|< − 10 dB) of 134.13%, which expands from 3.1 to 15.72 GHz, covering the entire UWB frequency range and reaching a maximum gain of approximately 9.5 dBi at 14 GHz with an average value equal to 3.3 dBi throughout the functional frequency band and a maximum radiation efficiency of 97% obtained for the frequency 8.3 GHz with an average value equal to 94% over the whole frequency band. Excellent accordance between the simulation and measurement is observed. This antenna presents an approximately omni-directional radiation diagram in some directions, a dipole-like radiation pattern at lower frequencies and a quasi-stable group delay through the operating band, making the antenna relevant for most useful UWB applications, especially for indoor localization. Impedance matching is performed by employing two ellipses with diverse semi-major axes ″a″ as radiating patches and by optimizing the size, number, and position of the inserted slots in the downsized ground plane. Detailed information on the simulation and experimental results is provided and discussed.

在本文中，提出了一种原始廉价的UWB修改椭圆形天线，该椭圆形天线在其接地平面中包括缝隙。这种带有FR4环氧树脂基板的天线的尺寸非常适中，为21×24×1.6mm ³。测量结果证实建议的天线具有阻抗带宽（| S ₁₁| <− 10 dB）的134.13％，从3.1扩展到15.72 GHz，覆盖整个UWB频率范围，并在14 GHz时达到大约9.5 dBi的最大增益，在整个功能频段上的平均值等于3.3 dBi对于8.3 GHz频率，最大辐射效率为97％，在整个频段上的平均值等于94％。在仿真和测量之间观察到极好的一致性。该天线在某些方向上呈现近似全方向的辐射图，在较低频率下呈偶极子状的辐射方向图，并且在整个工作频带内具有准稳定的群时延，这使得该天线适用于大多数有用的UWB应用，尤其是室内定位。通过使用具有不同半长轴的两个椭圆来执行阻抗匹配”a ”作为辐射贴片，并通过优化缩小尺寸的接地平面中插入的插槽的尺寸，数量和位置来实现。提供并讨论了有关仿真和实验结果的详细信息。