VHF Pulse Transmitter for EMC Applications

Abstract

A pulse transmitter operating at VHF band has been designed using a pulse generator circuit and a pulse amplifier. The pulse generator circuit has been built using commercially available digital logic integrated circuits by taking advantage of the propagation delay characteristics. The pulse generator circuit produces a very short pulse in the order of several nanoseconds which is amplified by an RF amplifier. The goal of this design is to provide active shielding for electronics equipment within the VHF band when the well known passive shielding technique - Faraday cage-is unavailable or takes up too much space or is very costly.