Non-Foster-inspired Time-varying Matching of a Small Transmitting Dipole

Broadband matching of a small transmitting dipole is a long-standing problem in the antenna community. It is well known that classical passive resonant matching is inherently constrained by very narrow bandwidth. On the other hand, there are active approaches such as non-Foster-based matching and the recently intensively studied time-varying-based matching. This contribution gives a brief overview of all these approaches and compares their advantages and disadvantages. In addition, a novel approach is proposed that mimics a stable two-element non-Foster-based broadband matching of a short transmitting dipole, using a time-varying approach.