Non-reciprocal circuit device, communication equipment using the same, and method for assembling the non-reciprocal circuit device

摘要

A non-reciprocal circuit device includes a holder and a gyromagnetic component assembly (1). The holder includes a casing member (3) and a lid member (4). The casing member (3) has a bottom plate (34) and a plurality of side walls (31-33) spaced apart from each other and rising from a periphery of the bottom plate (34), each side wall (31-33) having a depression (36) in an edge opposed to another side wall in a direction of the periphery. The lid member (4) has a top plate (44) and a plurality of side walls (41-43) spaced apart from each other and hanging from a periphery of the top plate (44), each side wall (41-43) having a projection (46) on an edge opposed to another side wall in a direction of the periphery. The lid member (4) is coupled to the casing member (3) with the projection (46) fitted in the depression (36). The gyromagnetic component assembly (1) is housed in the holder between the top plate (44) and the bottom plate (34). When the projection (46) is fitted in the depression (36),a top plate-side end face (461) of the projection (46) is at least partially pressed against an opposing inner face (361) of the depression (36) while a bottom plate-side end face (462) of the projection (46) is spaced apart from an opposing inner face (362) of the depression (36).