A Compact Extremely High Frequency MPM Power Amplifier
A Compact Extremely High Frequency MPM Power Amplifier
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DOI：
10.1109/ted.2018.2808327
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发表时间：
2018-03
影响因子：
3.1
通讯作者：
C. Armstrong;R. Kowalczyk;A. Zubyk;Kevin Berg;C. Meadows;D. Chan;T. Schoemehl;R. Duggal;Nora Hinch;R. True;R. Tobin;Michael Sweeney;B. Weatherford
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文献类型：
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作者：
C. Armstrong;R. Kowalczyk;A. Zubyk;Kevin Berg;C. Meadows;D. Chan;T. Schoemehl;R. Duggal;Nora Hinch;R. True;R. Tobin;Michael Sweeney;B. Weatherford
介绍了一种用于高分辨机载雷达的小型射频真空功率放大器的研制。该放大器是一个微波功率模块（MPM），工作在231.5-235 GHz的上毫米波频段，提供32 W的峰值输出功率。与Electron Devices之前的极高频MPM开发相同，${G}$波段MPM由周期性永磁聚焦蛇形波导行波管（TWT）和小型化20 kV电子功率调节器组成。用于饱和的MPM的输入驱动约为10 mW。低损耗化学气相沉积金刚石WR-4.3窗口作为行波管的输入和输出端口。由于雷达应用的高负荷，四级行波管收集器用于波束能量回收。MPM采用270- $\text{V}_{\sf {dc}}$电源工作。两个MPM配置已建成：一个单一的集成单元的实验室测试和一个分裂包配置集成在一个标准的电光/红外万向节。分体式飞行试验装置的最大主功率要求为176 W，相当于总放大器效率为9%。雷达传感器已在改装的DC-3试验台上飞行，在云层遮挡的操作条件下获得高分辨率实时视频图像。
The development of a compact radio frequency (RF) vacuum power amplifier for high-resolution airborne radar is described. The amplifier, a microwave power module (MPM), operates in the upper millimeter-wave frequency band of 231.5–235 GHz providing a peak output power of 32 W. Common with previous extremely high frequency MPM development at Electron Devices, the ${G}$ -band MPM consists of a periodic permanent magnet focused serpentine waveguide traveling wave tube (TWT) and a miniaturized 20-kV electronic power conditioner. Input drive to the MPM for saturation is around 10 mW. Low-loss chemical vapor deposition diamond WR-4.3 windows serve as the input and output ports of the TWT. Due to the high duty of the radar application, a four-stage TWT collector is employed for beam energy recovery. The MPM operates from a 270- $\text{V}_{\sf {dc}}$ power source. Two MPM configurations have been constructed: a single integrated unit for laboratory testing and a split-package configuration for integration in a standard electro-optical/infrared gimbal. The split-package flight test unit has a maximum prime power requirement of 176 W, corresponding to an overall amplifier efficiency of 9%. The radar sensor has been flown on a modified DC-3 test bed with high-resolution real-time video imagery obtained under cloud-obscured operating conditions.