本文大致分为两个部分:第一部分概略介绍目前国外在建立微波功率基准中的发展状况,阐明微波功率标准的惫义;第二部分也是本文重点部分,讨论一种我们研制的毫瓦级、干负荷、焦耳式微热量计的工作原理、射频负载及隔热系统的设计、误差来源与精度分析,并给出初步测试结果及今后改进方向。 This article is divided into two parts: The first part is a brief introduction to the current situation in the establishment of microwave power benchmarks in foreign countries to clarify the power of microwave power; The second part is also an important part of this article to discuss a milliwatt- Dry load, working principle of joule-type microcalorimeter, design of radio frequency load and thermal insulation system, source of error and accuracy analysis, and gives the preliminary test results and future improvement direction.