  A resistive coupling circuit is used to model the recently discovered
dissipative coupling in a hybridized cavity photon-magnon system. With this
model as a basis we have designed a planar cavity in which a controllable
transition between level attraction and level repulsion can be achieved. This
behaviour can be quantitatively understood using an LCR circuit model with a
complex coupling strength. Our work therefore develops and verifies a circuit
method to model level repulsion and level attraction and confirms the
universality of dissipative coupling in the cavity photon-magnon system. The
realization of both coherent and dissipative couplings in a planar cavity may
provide new avenues for the design and adaptation of dissipatively coupled
systems for practical applications in information processing.
