长脉冲微波热声效应的实验研究

Experimental Study on Long Pulse Width Microwave-Induced Thermo-Acoustic Effect

微波热声效应是一种生物组织在微波脉冲信号的照射下向外辐射声波信号的特殊现象,产生的声波信号携带着生物组织对微波信号的吸收特性,以及生物组织吸收微波能后发生的一系列生物化学物理反应的变化等信息。本文介绍了电子科技大学设计、搭建的一套脉冲宽度6ms,功率约800 W的长脉冲微波热声效应实验系统,并介绍了初步实验研究结果。结果表明在长脉冲条件下,微波热声效应与微波的脉冲特性有复杂的关联性,内涵丰富的物理化学机制,具有很大的潜在研究价值。

Microwave-Induced Thermo-Acoustic （MITA） Effect is a special phenomenon that biological tissues under the irradiation of microwave pulse and produced microwave ultrasonic signal. These acoustic signals carry on absorbing properties of microwave signals, biological tissue and biological tissues absorb microwave energy after a series of biochemical information such as the change of the physical reaction. In this paper, we introduce the design and experiment set of long pulse width MITA research system with pulse width of 6 ms and power is about 800 W. The initial experimental results are also presented. The re-sults show that complex relation between microwave and acoustic signal is exsited in the long pulse width microwave irradiation which has a great potential research value.