| 摘要 |
According to an embodiment of the present invention, a triple-band band-stop filter comprises: a micro strip transmission line pattern formed as a horizontal line on the surface of a circuit board; and a first step type impedance resonator which is connected to a side of the transmission line and is combined with an external rectangular pattern and a spiral-type meander pattern inside the rectangular pattern. The first step type impedance resonator includes: a first impedance line pattern formed as a first vertical line of a first periphery which is vertically connected to a side of the transmission line, as a first external horizontal line which forms a horizontal line at an end of the first vertical line of the first periphery by being extended from the end of the first vertical line of the first periphery, as a first external second vertical line which maintains a coupling gap of a fixed width with the transmission line pattern and forms a vertical line by being extended from the first external horizontal line, and is formed by a first width; a second impedance line pattern which is connected to an end of the first impedance line pattern, is formed as a lower horizontal line, while maintaining the coupling gap with the transmission line pattern in parallel, and is formed by a second width smaller than the first width; and a third impedance line pattern which is connected to an end of the second impedance line pattern, is formed as a spiral meander pattern inside the rectangular pattern formed as the first and second impedance line patterns, and is formed by a third width smaller than the second width. The triple-band band-stop further includes a second step type impedance resonator which is symmetrically formed by the same size, so as to be linearly symmetric with respect to the transmission line pattern in an opposite side space, in which the first step type impedance resonator is arranged, from the transmission line pattern. |
