Experimental demonstration of high-resolution ultra-wideband impulse radar based on electrical-optical hybrid pulse generation

摘要

A high-resolution ultra-wideband (UWB) impulse radar has been developed in order to realise high-resolution object imaging in a ground-penetrating radar (GPR) for landmine detection. The UWB impulse radar is based on an electrical¿optical hybrid pulse generation scheme such that a clean, short pulse train with small, short ringing can be generated. The generated UWB impulse train has a pulse duration of approximately 200 ps and a repetition rate of less than 1GHz. Its estimated equivalent isotropically radiated power was well matched with a spectral mask for GPRs, as defined by the Federal Communications Commission of the USA. From an experimental demonstration, it was observed that the developed highresolution UWB impulse radar was able to resolve a relative positional change of an object with a resolution of less than 10mm, resulting in accurate imaging of a complex three-dimensional object.