Abstract: Provided are a silicon nitride film etching composition, a method of etching a silicon nitride film using the same, and a manufacturing method of a semiconductor device. Specifically, a silicon nitride film may be stably etched with a high selection ratio relative to a silicon oxide film, and when the composition is applied to an etching process at a high temperature and a semiconductor manufacturing process, not only no precipitate occurs but also anomalous growth in which the thickness of the silicon oxide film is rather increased does not occur, thereby minimizing defects and reliability reduction.

Abstract: The present invention relates to a mobile communication base station system comprising: a donor unit connected to a baseband unit; and a remote unit installed at the base station antenna side, wherein the donor unit has a baseband signal processing part including a digital signal processing part for processing interface with the baseband unit, a wireless communication part for processing a wireless communication signal between the baseband signal processing part and the remote unit, and a synchronization and communication control part for processing a synchronizing signal and a communication control signal from the baseband unit, and wherein the remote unit has a service signal processing part for processing MIMO interface with a base station antenna, a wireless communication part for processing a wireless communication signal between the service signal processing part and the donor unit, and a synchronization and communication control part for processing a synchronizing signal and a communication control sig

Abstract: A small-sized base station employed in a mobile communication system is disclosed. To this end, the small-sized base station in a mobile communication system, according to one embodiment of the present invention, is a base station device in a mobile communication system comprising: a case which has the shape of a polyhedron and is hollow inside; a housing accommodated inside the case and having the same polyhedron shape as the case; and at least one board which is positioned between the case and the housing.

Abstract: The present invention discloses a base station, the size of which is reduced and which is to be adopted in a mobile communication system. The disclosed small base station includes: a polyhedral housing; an antenna unit disposed on the widest surface of the outer surface of the housing; a first board arranged on any outer surface of the housing; and two or more boards which are arranged in an upright state with the first board and which are arranged to face three or more outer side surfaces of the housing, respectively.

Abstract: The present invention relates to a mobile communication base station system comprising: a donor unit connected to a baseband unit; and a remote unit installed at the base station antenna side, wherein the donor unit has a baseband signal processing part including a digital signal processing part for processing interface with the baseband unit, a wireless communication part for processing a wireless communication signal between the baseband signal processing part and the remote unit, and a synchronization and communication control part for processing a synchronizing signal and a communication control signal from the baseband unit, and wherein the remote unit has a service signal processing part for processing MIMO interface with a base station antenna, a wireless communication part for processing a wireless communication signal between the service signal processing part and the donor unit, and a synchronization and communication control part for processing a synchronizing signal and a communication control sig

Abstract: The present invention relates to a device for forming a wireless high-frequency signal path, comprising: a plurality of output ends respectively connected so as to correspond to a plurality of antenna arrays; a plurality of input ends respectively connected so as to correspond to a plurality of amplifiers; a switching module for forming a path for variably connecting each of the plurality of input ends to one selected from the plurality of output ends according to a switching control signal; and a control unit for receiving an external command and outputting a switching control signal for controlling a switching operation of the switching module according to the external command.

Abstract: A small-sized base station employed in a mobile communication system is disclosed. To this end, the small-sized base station in a mobile communication system, according to one embodiment of the present invention, is a base station device in a mobile communication system comprising: a case which has the shape of a polyhedron and is hollow inside; a housing accommodated inside the case and having the same polyhedron shape as the case; and at least one board which is positioned between the case and the housing.

Abstract: The present invention discloses a base station, the size of which is reduced and which is to be adopted in a mobile communication system. The disclosed small base station includes: a polyhedral housing; an antenna unit disposed on the widest surface of the outer surface of the housing; a first board arranged on any outer surface of the housing; and two or more boards which are arranged in an upright state with the first board and which are arranged to face three or more outer side surfaces of the housing, respectively.