Unit piece of electromagnetic wave lens

The invention provides a unit piece of an electromagnetic wave lens. The unit piece has a combinable function. The unit piece of the electromagnetic wave lens particularly comprises a cone-shaped part and an additional part, a cavity is formed in the cone-shaped part, and the cavity is called a medium cavity; a thinning part is further formed at the opening end of the conical part and is of a whole-circle thinning structure; and one end of the additional part is connected with the conical part through the thinning part. The unit piece has the following advantages: 1) an assembly structure of the cone-shaped part and the additional part is naturally matched with the theoretical model of a Luneberg lens, so that the lens body has strong restoring power to the theoretical effect; 2) the conical part of one specification can be matched with additional parts of various specifications so that lens bodies of various specifications can be produced, the product development and production cost is low, and the productio