Synchronization of forced reactively coupled van der Pol oscilators

Synchronization of forced reactively coupled van der Pol oscilla- tors is investigated in the phase approximation. We discuss essen- tial features of the reactive coupling. Bifurcation mechanisms for the destruction of complete synchronization and possible quasi-periodic regimes of different types are revealed. Regimes when autonomous oscillators demonstrate frequency locking and beating regimes with incommensurate frequencies are considered and compared.