Improvement of Electromagnetic Pulse Radiation Efficiency

Abstract

Practical aspects of effective generation of short electromagnetic pulses (EMP) and improvement of radiation efficiency are discussed in this paper. Descriptions of the EMP radiation based on the Poynting vector definition and energy transformation are presented below. Antennas classification based on energy behavior in the radiating system is proposed and discussed. Properties of kinetic energy accumulated antennas are analyzed. To generate electromagnetic pulse the kinetic energy accumulated antenna is combined with such opening switch as drift step-recovery diode (DSRD). Operation principles of the DSRD are discussed. Criteria of diodes selection for its application in drift step-recovery (DSR) mode are proposed and described. Methods of provision the DSRD operation condition with a balanced current driver are developed and analyzed. A prototype of antenna-generator that utilizes proposed operation principles was designed, developed and examined. Waveform and power spectrum are presented. Peak power more than 1 kW was achieved on the antenna terminal with 3 ns pulse duration and up to 200 kHz pulse repetition frequency (PRF). The prototype's power consumption didn't exceed 4 W under 100 kHz PRF condition. The proposed approach allows producing of stable nanosecond electromagnetic impulses with hundreds kilowatts peak power and PRF up to hundreds kHz.

Simulation of Transceiver RF Front End Based on ADS

“…The fast edge electromagnetic pulse (FREMP) is an electromagnetic pulse with a rising edge of several ns and a lasting time of dozens of NS. Its frequency bandwidth, high frequency distribution, high instantaneous power [4][5], more damage and destructive to the highly integrated electronic system, have become a hot spot at home and abroad.…”