Comparative experimental investigations of combined and helical ultra-wideband antennas are performed. The antennas are optimized to be excited by the 1 ns bipolar voltage pulses. The antenna matching with the feeder is studied in the frequency domain. The antenna patterns by the peak value of the radiated field are studied in the time domain for E- and H-planes. The effective potential values in the boresight radiation direction are studied as well with the same exciting voltage pulse at the antenna inputs. A probability is found for the effective potential of the helical antenna to be larger than that of the combined antenna in the case of an arbitrary orientation of the receiving linearly-polarized antenna. The effective potential of both antennas was registered in the pattern maxima at the same distances. This probability is equal to 0.6.

中文翻译：

---

超宽带组合天线和螺旋天线的有效电位比较

对组合式和螺旋式超宽带天线进行了对比实验研究。天线经过优化，可被 1 ns 双极电压脉冲激发。在频域研究天线与馈线的匹配。在 E 和 H 平面的时域中研究由辐射场峰值引起的天线方向图。在天线输入端使用相同的激励电压脉冲时，还研究了视轴辐射方向上的有效电位值。发现在接收线极化天线任意方向的情况下，螺旋天线的有效电位有可能大于组合天线的有效电位。在相同距离的方向图最大值中记录了两个天线的有效电位。这个概率等于 0.6。