Equivalent Circuit Modeling and Signal Integrity Analysis of Magneto-Static Responsive Structures, and Their Applications in Changing The Effective Permittivity of Microstrip Transmission Lines

Abstract

This work presents the equivalent circuit model, ringing and overshoot characteristics, as well as the ability of a new magneto-static responsive structure (MRS) to achieve the recon gurabil- ity of a variable e ective permittivity structure (VEPS). Through the use of a static magnetic eld and micro-sized conductive magnetic particles, the MRS can be used to connect separate transmis- sion lines (TL) that operate up to a radio frequency of 5 GHz. The simulated and measured results show the MRS functions well compared to other switching methods. The VEPS's ability to achieve e ective permittivity recon gurability is also demonstrated, showing that the VEPS functions as the well-known mushroom structure when the MRSs are in the on state and as a regular TL when the MRSs are in the o state. Finally, several brief studies of the MRS are performed, including the activation methods, MRS geometry, di erent types of magnetic particles, and smaller embedded MRSs within the VEPS.