Abstract: In a monolithic ceramic electronic component, where a distance in the height direction between one of outer-layer dummy conductors in an outer layer portion, which is arranged closest to an inner layer portion, and one of inner electrodes in the inner layer portion, which is arranged closest to the outer layer portion, is b, and an opposing distance between an adjacent pair of first inner electrodes and second inner electrodes in the height direction is t, 2t?b is satisfied, such that the outer-layer dummy conductors can be spaced a sufficient distance away from the inner electrodes, and such that the distance between the inner electrodes can be prevented from being reduced when the inner electrodes arranged in overlapping relation to the outer-layer dummy conductors are pressed in a pressing step before firing, and a reduction of BDV can be prevented.

Abstract: A resonator, a filter, an oscillator, a duplexer, and a communication apparatus employing these devices have improved efficiency characteristics in confining an electromagnetic field in an opening of an electrode, suppressed current concentration, and minimized conductor loss. Electrode patterns are formed near short-circuited positions in a slot so that the slot will be divided into smaller-width slot lines. Consequently, the efficiency in confining the electromagnetic field is improved, and conductor loss is minimized.