摘要
针对200－500MHz频段对数周期天线（LPDA）尺寸较大的问题,采用正弦曲线作为LPDA的振子进行小型化设计,并用介质加载的方法进一步缩小其尺寸。最终设计的天线纵向尺寸约为0.3λL（λL为最低频率200MHz对应的波长）,在200－500MHz工作频段内VSWR≤2,增益不小于4dBi,H面波束宽度大于135°。
In this paper, to solve the problem of large size of the Log-Periodic Dipole Arrays （LPDA） in the frequency band 200-500MHz, sinusoidal curves are used as the dipole arms, and substrates are loaded. The designed antenna has a width of 0.3 λ L （λ L is the wavelength of the lowest frequency 200MHz）. In the frequency band from 200-500MHz, the antenna achieves VSWR lower than 2, gain higher than 4 dBi and H-plane beamwidth wider than 135° .
出处
《通信对抗》
2015年第3期46-49,共4页
Communication Countermeasures
关键词
对数周期偶极天线
正弦曲线
介质加载
天线小型化
Log-Periodic Dipole Arrays （LPDA）
sinusoidal curve
substrate loaded
antenna miniaturization
