Linear analysis of ring-type coupled ILO array

In this paper, expressions on the locking performance of a ring-type coupled MESFET injection-locked oscillator (ILO) array are presented using nodal-admittance matrix representation. The formulations are derived on a linear approach, hence they are effective in the ILO array design. The locking performance of ILO array includes the free-running frequency, output power and locking bandwidth. The derived formulations are verified with measurement results of a four-element ring-type coupled ILO array.