Matsukura Maho, Shimamura Kohei, Suzuki Masatoshi, Yokota Shigeru, Minami Ryutaro, Kariya Tsuyoshi, Imai Tsuyoshi
Department of Energy and Mechanical Engineering, University of Tsukuba, Tsukuba, Japan.
Plasma Research Center, University of Tsukuba, Tsukuba, Japan.
Rev Sci Instrum. 2019 Feb;90(2):024703. doi: 10.1063/1.5050957.
An instantaneous measurement system of high-power millimeter-wave was proposed and demonstrated with a 28 GHz gyrotron at the Plasma Research Center, University of Tsukuba. The high-power detector consists of an attenuator and a linear polarized microstrip antenna with an F-class load rectifier, which is a commonly used system for radio-frequency wireless power transmission. The detector obtained the power distribution of the gyrotron output beam which showed good agreement with the infrared camera image. The rectenna array detector received 45 W RF input power with a 0.4 ms response time. The results revealed that the proposed narrow band detector is useful as an imaging sensor and power meter for high-power millimeter-wave beam output with a wide wavelength range.
筑波大学等离子体研究中心提出并演示了一种高功率毫米波瞬态测量系统，该系统采用了一台28吉赫兹的回旋管。高功率探测器由一个衰减器和一个带有F类负载整流器的线性极化微带天线组成，这是一种常用于射频无线电力传输的系统。该探测器获得了回旋管输出光束的功率分布，其与红外摄像机图像显示出良好的一致性。整流天线阵列探测器以0.4毫秒的响应时间接收了45瓦的射频输入功率。结果表明，所提出的窄带探测器可用作宽波长范围内高功率毫米波束输出的成像传感器和功率计。
