Resistive Loaded Antenna for Ground Penetrating Radar Inside a Bottom Hole Assembly

Abstract

Resistive loaded antennas are widely used in ground penetrating radar scenarios due to their good pulse radiation behavior and small size. Despite these facts their implementation into an antenna housing with absorber material and shielding leads to a quite cumbersome ground penetrating radar component not suitable for integration into a bottom hole assembly (BHA). Furthermore, the metallic bottom hole assembly influences the pulse radiation behavior in a negative way. This article describes an antenna design optimized for integration into a bottom hole assembly, incorporating simulation and measurement. As a result, ground penetrating radar usage may now be extended to the field of logging/measuring while drilling, maximizing the information about the surrounding media during the drilling process.