摘要
设计了一款紧凑型的全向圆极化天线,该天线由四个弯折偶极子和相应的馈电网络组成。弯折偶极子的水平和垂直结构部分分别产生水平和垂直极化分量的辐射电场,且两个分量之间90°的相差是由天线的结构实现的,当调整水平与垂直极化分量的幅度相等时,便可辐射圆极化波。该天线的尺寸仅为0.35λ0×0.35λ0×0.17λ0,实现了9.8%的带宽(|S11|≤-10 dB且AR≤3 dB)和水平面上0.68 dB的增益。
A compact omni-directional circularly polarized antenna is proposed in this paper. The antenna consists of four bended dipoles and an integrated feeding network simultaneously exciting these four dipoles. Horizontal and vertical polarized electric field components are generated through the corresponding parts of the bended dipoles, and 90°phase difference between them are naturally guaranteed. Once the magnitudes of them are adjusted to be equal, a good circular polarization can be achieved. With a size of 0.35λ0×0.35λ0×0.17λ0, the antenna exhibits a bandwidth of 9.8% （｜S11｜≤-10 dB dtAR≤3 dB） and a left-handed CP average gain of 0.68 dB in the azimuth plane at the center frequency 2 GHz.
出处
《通信对抗》
2014年第2期44-47,共4页
Communication Countermeasures
关键词
弯折偶极子
圆极化
全向天线
bended dipole
circular polarization
omni-directional antenna
