焦平面耦合文章Abstract—Afocalplanearrayfeedofelectricallysmallelementshasbeenproposedasameansforachievinghighsensitivityforradioastronomyapplicationsinthepresenceofradiofrequencyin-terference(RFI).Forabroadbandsystem,mutualcouplingeffectsbecomesignificantasthearrayelementspacingbecomessmallre