摘要
为了改善微波能量辐射的均匀程度,设计了一个矩圆过渡喇叭。在加入生物组织模型后进行仿真优化,并根据仿真优化结果制作了一个矩圆过渡喇叭。测试结果表明:此设计将系统的反射系数改善了9 dB以上。同时,对矩圆过渡喇叭和BJ-22矩形波导进行微波热致超声信号对比实验,比较分析结果表明:该设计可有效地改善微波能量辐射的均匀性,对设计更高效的微波脉冲馈源提供了重要参考。
In order to improve the uniformity of microwave energy radiation, the authors designed a rectangular-circular horn according to the simulation optimization results with introduction of biological tissue model. Experimental results show that this design reduces the reflection coefficient by over 9 dB. Meanwhile, we implemented an experiment about microwave heat-induced ultrasound between rectangular-circular horn and BJ-22 rectangular waveguide. By comparing the thermo-acoustic signals, it is demonstrated that this design improves the uniformity of microwave radiant energy. The work in this paper can provide important reference to design more effective microwave pulse feed.
出处
《电波科学学报》
EI
CSCD
北大核心
2010年第3期543-547,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金(NO.60927002
NO.60728101)
四川省杰出青年学科带头人培养计划(08ZQ026-39)
关键词
微波脉冲
波导
热声信号
热声成像
microwave pluses
waveguide
thermo-acoustic signals
thermo-acoustic tomography
