Mohania Praveen, Mahawar Ashish, Shrivastava Purushottam, Gupta P D
Raja Rammana Centre for Advanced Technology (RRCAT), Indore 452013, India.
Rev Sci Instrum. 2013 Sep;84(9):094703. doi: 10.1063/1.4820558.
A 10 kW, 476 MHz, 0.1% duty cycle solid state RF amplifier system for driving sub-harmonic, pre-buncher cavity of IR-FEL injector LINAC, has been developed at RRCAT. The 10 kW power is achieved by combining output of eight 1400 W amplifier modules using 8-way planar corporate combiner. The solid state amplifier modules have been developed using 50 V RF LDMOS transistors which although meant for push-pull operation are being used in single ended configuration with matching circuit developed on a thin (25 mils), high dielectric constant (9.7), low loss microwave laminate with an aim to have a compact structure. Ease of fabrication, modularity, small size, and low cost are the important features of this design which could be used as a template for low duty cycle medium to high pulsed power UHF amplifier system.
拉贾斯坦邦中央加速器和技术研究所（RRCAT）已研制出一种10千瓦、476兆赫、占空比为0.1%的固态射频放大器系统，用于驱动红外自由电子激光注入器直线加速器的亚谐波预聚束腔。10千瓦的功率是通过使用八路平面公共合成器组合八个1400瓦放大器模块的输出实现的。固态放大器模块是使用50伏射频横向扩散金属氧化物半导体（RF LDMOS）晶体管开发的，这些晶体管虽然用于推挽操作，但在单端配置中使用，并在薄（25密耳）、高介电常数（9.7）、低损耗微波层压板上开发了匹配电路，目的是实现紧凑结构。易于制造、模块化、体积小和成本低是该设计的重要特点，可作为低占空比中高脉冲功率超高频放大器系统的模板。
