Abstract: A radio frequency filter comprising: housing body having input/output connectors and containing space which is divided into spaces by means of diaphragm; at least one resonator rod arranged in the housing; housing cover coupled to the housing body; wherein the housing body and the housing cover are coupled to each other by laser welding. The radio frequency filter according to the present invention can reduce PIMD due to reduce Contact Nonlinearity, and inhibit to erode away because the laser welding method dissolve different metallic materials each other and take a convalent bond, and reduce its manufacturing process time and cost because it is unnecessary drilling a hole and fastening a screw to fasten the housing and the housing cover each other and can simplify its manufacturing process and raise productivity because only irradiate laser beam on irradiated area of the housing cover.

Abstract: A radio frequency filter comprising: housing body having input/output connectors and containing space which is divided into spaces by means of diaphragm; at least one resonator rod arranged in the housing; housing cover coupled to the housing body; wherein the housing body and the housing cover are coupled to each other by laser welding. The radio frequency filter according to the present invention can reduce PIMD due to reduce Contact Nonlinearity, and inhibit to erode away because the laser welding method dissolve different metallic materials each other and take a convalent bond, and reduce its manufacturing process time and cost because it is unnecessary drilling a hole and fastening a screw to fasten the housing and the housing cover each other and can simplify its manufacturing process and raise productivity because only irradiate laser beam on irradiated area of the housing cover.