Reflectionless Coupling Circuit for Broadband Power Line Communication

This study proposes capacitive coupling circuits for broadband power line communication (PLC) that integrate pseudo-elliptic low-pass and high-pass reflectionless filters to improve impedance matching and reduce out-of-band reflections. The performance of the proposed design is evaluated against that of a PLC coupling circuit using a conventional elliptic filter. Numerical simulations, followed by experimental results, show that the inclusion of reflectionless filters improves the performance of the PLC coupling circuit by enhancing impedance matching and reducing out-of-band energy reflection.