The invention discloses an 
artificial surface plasmon-based miniaturized low-pass filter. The 
artificial surface plasmon-based miniaturized low-pass filter is characterized by mainly comprising a 
coplanar waveguide, wherein two ground strips of the 
coplanar waveguide are provided with groove unit arrays which are periodically distributed along the length direction of the 
coplanar waveguide; the two groove unit arrays are longitudinally symmetric about a center conductor strip; the depths of groove units are uniformly and progressively increased from two sides to the middle part in the length direction of the coplanar 
waveguide; and the depth of the groove unit in the middle part is fixed. On the basis of the coplanar 
waveguide, an 
artificial surface plasma structure is constructed by 
etching the periodic groove units on the ground strips by the coplanar 
waveguide to achieve the filtering function. T-shaped grooves are introduced; and equivalent depths of the grooves in the width direction are increased, so that the device 
miniaturization is achieved. The artificial 
surface plasmon-based miniaturized low-pass filter has a series of advantages of being simple in structure, compact in size, good in filter performance, easy to process, suitable for being matched with a traditional 
microwave transmission line and the device for use and the like.