Reciprocity of Lorentz

This lecture covers the reciprocity theorem of Lorentz, which is fundamental in electromagnetism. It explains how the transfer function of passive filters remains independent of input/output ports. The reciprocity relation is explored, showing how it applies to transmission systems using antennas and linear systems. The lecture demonstrates how the impedance of generators and loads affects the behavior of electronic filters. It also discusses the symmetry of matrices in linear systems and the implications of reciprocity in various linear representations. The principle of reciprocity in electricity is highlighted through general relations between currents and voltages in passive and linear circuits.