| 摘要: |
| 为满足高速铁路无损探测需兼顾低频探测深度与高频探测精度的要求，采用理论计算
与软件仿真结合的方法，设计制作了一种双频带（300 MHz/1 GHz）指数型TEM喇叭天线
并对其进行了测量。所设计的指数型TEM喇叭天线采用末端加载和适当天线臂切削来实现此
超宽带天线的双频带工作。仿真与实测结果表明，天线分别工作在中心为360MHz、带宽
约为110 MHz的低频带和中心为1020MHz、带宽约为260MHz的高频带，相对
带宽均大于20%。实测天线的接收信号保真度较高，拖尾持续时间短，满足设计要求。此外
，这种双频带天线系统可减少雷达系统天线和采样盒等设备的使用数量，降低雷达系统的成本
，有较好工程应用前景。 |
| 关键词: 探地雷达天线 路基探测 TEM喇叭 双频带 末端加载 超宽带 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目（51277012）;中央高校基本科研业务项目(CHD2011JC049，CHD2011ZD004) |
|
| Design of a loaded dual-band(300MHz/1GHz) antenna for vehicular UWB GPR application |
| GUO Chen,ZHANG An-xue,LIU Ce |
| () |
| Abstract: |
| To meet the demand of nondestructive exploration for high-speed railwa
y, which requires outstanding depth in low frequency and resolution in high freq
uency, a dual-band (300 MHz and 1 GHz) exponential Transverse Electric and Magn
etic (TEM) horn antenna is designed based on theoretical calculation and numeric
al simulation in this paper. End-loading and arm profiling are utilized in the
proposed antenna design for conducting the dual-band performance. Simulation and ex
periment results show that the antenna works both in 360 MHz and 1 020 MHz
with bandwidths of 110MHz and 260MHz respectively, which exceeds the ultra-wid
e band(UWB) requirement of 20% relative bandwidth. The proposed antenna also has
the advantages in signal fidelity and low ringing, which fully meets the design requireme
nts. Furthermore, the proposed dual-band UWB antenna system has more potential
advantages in engineering application field because of the low cost of the entire
radar system. |
| Key words: ground penetrating radar (GPR) antenna railway substructure detection TEM horn dual-band end-loaded UWB |
