An acoustic filter assembly for operating at a target band including multiple spaced sub-target bands. The filter assembly includes a first filter that passes a first band and a second filter that passes a second band. The first filter and the second filter have a transition band between the first band and the second band that is wider than the spacing between the sub-target bands. An interface receives a control signal that controls the transition band to be shifted between a first position and a second position, such that an upper part of a lower sub-target band is covered by the first band in the first position, and a lower part of an upper sub-target band is covered by the second band in the second position.

An electronic component includes an element body and a resonator within the element body. The resonator comprises two conductors extending in a second direction and an inductor conductor connecting them. When viewed from the second direction, at least one of the conductors has a first length in a first direction that is longer than a second length in a third direction. In a graph where the horizontal axis represents the second length of the conductor and the vertical axis represents the Q factor, if X1 and X2 are values on the horizontal axis and Y1 and Y2 are corresponding Q factors on the vertical axis, the slope (Y2Y1)/(X2X1) is negative.