Pcss Time Domain Antenna-based Spatial Power Combining Technology Research

A high-power electromagnetic pulse synthesized photoconductive semiconductor switch (PCSS), time-domain ultra-wideband antennas and spatial power combining technology is studied in detail. Compared with other electric pulse generators, the use of PCSS offers important advantages such as fast switching speed, high cut-off voltage, stable triggering, small size, and it plays an important role in the generating of ultra-wideband electromagnetic signal and high-power electromagnetic pulse.The time-domain antenna offers important advantages in ultra-short electric pulse radiation with ultra-wideband characteristics, and time-domain pulse shape is easier in the superposition in space. Therefore, it plays an important role in areas such as precise positioning, stealth target detection, especially in the areas spatial powers combining technology.Spatial power combining technology is one of the most effective ways to generate high-power microwave. Power synthesis is achieved by element beam of the array antenna in free space; the radiation power density can be largely enhanced at the target area. Using time-domain antenna array spatial power combining technology the transient high-energy pulsed power can be generated in the form of time-domain pulses.This thesis starts with an introduction of PCSS output electrical current waveform, then two working models of PCSS are introduced and each model is discussed. At last, the nonlinear mode of PCSS is analyzed theoretically.Secondly, the parameters of time-domain ultra-wideband antenna are introduced. The evaluation criterias and design requirements of time-domain ultra-wideband antenna are determined. The existing types of ultra-wideband antenna are analyzed and a high performance bipolar variable angle antenna is designed.Finally, the electrical current response of PCSS is used as incentive of the antenna and the bipolar variable angle antenna is used as array element, the use of optoelectronic true time delay (OTTD) in simulation guarantees synchronization of the antenna array at the target. The spatial power combining of antenna array is researched.