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作者针对使用频段高于设计频率的四分之一波长天线进行了一项研究,以下是他的分析结果。不久前我的朋友乔·约翰逊(K3RR)问我,如果将λ/4、160m的垂直天线用于80m的频段会怎样。我俩都知道,80m波段的天线高度大约是0.5λ。所以我们希望增益更高,主辐瓣峰值的发射角更小。但我们都不知道具体量化结果如何。带着这样的想法,本文依次回答以下几个问题:第一个问题:“当一个被设计应用于某个波段的垂直天
The authors conducted a study on quarter-wave antennas using a frequency band higher than the design frequency, and the following is his analysis. Not long ago my friend Joe Johnson (K3RR) asked me what would happen if a vertical antenna of λ / 4,160m was used in the 80m band. We both know that the antenna height in the 80m band is about 0.5λ. Therefore, we hope that the gain will be higher and the emission angle of the main radiation peak will be smaller. But we do not know how to quantify the results. With this in mind, this article in turn answers the following questions: The first question: ”When a vertical day that is designed to work in a band