毫米波50W 连续波固态发射机的设计与实践

随着微波固态功率器件和单片集成电路的发展,雷达、制导和通信等向更高频段扩展,大功率毫米波固态功放已成为国内外业内人士的主攻方向。文中介绍了一种毫米波50W 连续波固态发射机,设计了一种紧凑高效率的新型微带贴片与波导双模空间耦合功率合成电路,合成效率大于89%。文章详细描述了发射机中功放模块的电路设计、功放芯片的贴装、键合等关键技术。以往电路设计中往往忽略了由于金丝键合引入感抗而导致电路性能指标下降,因此对金丝键合给电路所带来的影响及其解决途径作了分析。文章还介绍了该发射机的控制检测、保护等电路与冷却结构设计。发射机的性能完全满足指标要求,并已成功用于整机之中。以其中的功率模块为基础,可以构成更大输出功率的毫米波固态发射机。

Design and Experimental Research ofa Millimeter Wave 50W CW Solid State Transmitter

The radar, guidance and communication are being operated at higher frequency, along with the develop ment of microwave solid state power devices and MMIC, the high power millimeter wave solid state amplifier becomes mainresearch direction at home and abroad. A solid state transmitter has 50W CW output power working in Ka band is introducedin the paper. It has compact and high efficiency novel microstrip patch and waveguide double mode space couple power com biners,the combined efficiency is over 89%. The circuits design of power amplifier modules, chip mounting and bonding aredescribed detailed in the paper. The circuit performances become worse due to the neglect of inductive impedance caused bybonding wires at higher frequency, the effects and solutions are also analyzed in the paper. The thermal design, controlling,protecting of the transmitter are also given in this paper. Through manufacture, test, the performances of the transmitter fullymet the performance requirements, and has been successfully used in the system. By using the power amplifier modules, alarger output power transmitter can be easily obtained.