一种宽带电小天线的研制

本文提出了一种天线结构,即用单极子向Γ结构进行电磁耦合馈电.仿真和实测结果表明,和普通单极天线相比,该天线能够将高度降低一半,并将相对带宽展宽到66%,实现了天线的小型化和宽带化.该天线的相频特性为线性,输出信号波形失真较小,可发送宽带信号.经过特殊的设计,还可以改善匹配和增益,使天线在整个工作带宽范围内的驻波比小于2...

Study on a Broadband Electrically Small Antenna

This paper presents a type of antenna structure,in which a Γ structure is fed by monopole through electromagnetic coupling.Simulation and experimental results show that,compared to the general monopole antenna,the height of this antenna can be cut in half,the relative bandwidth can be broadened to 66%.So this structure achieves miniaturization and broadband of antenna.Signal radiated by this antenna has a linear phase-frequency character and small distortion,so it can be used to send broadband signals.By special designing,we can improve matching and the gain.The VSWR(Voltage Standing Wave Ratio) is less than 2 in the whole working bandwidth,while the gain increases about 2 dBi at the low frequency of the working bandwidth and 1 dBi at the high frequency.