Abstract: A phase shifter, an antenna unit, and a base station are disclosed. According to an embodiment, the phase shifter includes a first plate and a second plate slidable relative to the first plate. Two parallel microstrip lines are provided on a first surface of the first plate. A means electrically coupled to the two parallel microstrip lines is provided on a second surface of the second plate that faces to the first surface of the first plate. The means defines a signal transmission path which couples the two parallel microstrip lines, and introduces an infinite impedance at two coupling points on the two parallel microstrip lines where the signal transmission path is coupled to the two parallel microstrip lines.

Abstract: A phase shifting device, an antenna unit and abase station are disclosed. According to an embodiment, the phase shifting device comprises a power divider and a phase shifter. The power divider comprises an input inlet for an input signal, a first output outlet connected with an impedance member having a system impedance, and a second output outlet connected with the phase shifter. The phase shifter comprises a first plate and a second plate slidable relative to the first plate. Two parallel microstrip lines are provided on a first surface of the first plate. An adjusting member is provided on a second surface of the second plate that faces to the first surface of the first plate.

Abstract: A warehouse data processing system including a handheld terminal and a database server, wherein the handheld terminal is connected with the database server, the handheld terminal is used to scan goods information and/or stock location codes, acquire stock data including the goods information and/or the stock location codes from the database server, and perform warehouse data processing on the stock data according to the scanned goods information and/or stock location codes. The warehouse data processing is achieved in a mobile and portable manner by using the handheld terminal to scan goods information and/or stock location codes and performing warehouse data processing on the stock data according to the scanned goods information and/or stock location codes.

Abstract: A warehouse data processing system including a handheld terminal and a database server, wherein the handheld terminal is connected with the database server, the handheld terminal is used to scan goods information and/or stock location codes, acquire stock data including the goods information and/or the stock location codes from the database server, and perform warehouse data processing on the stock data according to the scanned goods information and/or stock location codes. The warehouse data processing is achieved in a mobile and portable manner by using the handheld terminal to scan goods information and/or stock location codes and performing warehouse data processing on the stock data according to the scanned goods information and/or stock location codes.