Improvement of an UWB impulse radiation source by integrating photoswitch device

Optoelectronic devices triggered by a laser flash and operating in linear switching regime, allow the generation of short pulses with small time jitters (2ps typically). An Ultra Wide Band antenna array combining as many of this photoswitches as antennas has the advantage to increase the radiation power on one hand and to offer the agility of the radiation beam on the other hand obtained by time delay of laser illumination. The increase of the peak power and the frequency band can be obtained by integrating the photoswitch in the antenna. An equivalent model of photoswitch can be created with the transient solver of CST Microwave Studio coupled within CST Design Studio. This article presents the integration of a photoswitch within the antenna and the improvement of radiation.