Locally corrected Nyström technique and its relationship with RWG method of moment for current reconstruction using very-near-field measurements

The Locally corrected Nyström (LCN) method is used for current reconstruction on the surface of microwave boards and antennas. A relationship is established between LCN and RWG method of moment (MoM) for this application to enforce current continuity. This approach allows designers to find, characterize, and address the cause of a design failure in a microwave board or an antenna under test. The advantage of this method over the conventional method of moment (MoM) is that as a point-based approach efficiency can be enhanced in its acceleration with the multilevel fast multipole algorithm (MLFM).

I. Introduction

Reducing the time-to-market often is a key requirement for business success. In this regard, a real-time or even a fast prediction tool can be very beneficial in efficient microwave circuit implementation and antenna design. Moreover, through the design process of a typical high-frequency PCB circuit or antenna, designers need to be able to predict the EMI emissions off the prototypes in order to meet certain required standards or regulations.