Antenna assembled by vacuum and static electric attraction

An antenna assembled by actions of vacuum and static electric attraction, said antenna is comprised of a sleeve and an inner connecting rod which is adapted to inserting in and connecting to said sleeve and is adapted to installing therein a helix coil and a metallic connecting seat, said sleeve and said inner connecting rod are made of flexible material of different friction coefficients;

• said sleeve is provided with an upper closed end and a bottom opening, an inner bore with a plurality of sections with their diameters gradually enlarged from the inside to the outside are sequentially provided therein, at least two inner annular recesses are distributed longitudinally along said antenna to prevent air from communication with the outside and to generate attraction;
• said inner connecting rod is provided with a plurality of rod sections corresponding by position to said sections of said inner bore, and a plurality of annular protrusions of identical cross-sectional shapes respectively to those of said annular recesses are provided on said inner connecting rod;
• said inner connecting rod is inserted and connected through said bottom opening of said sleeve in a mode of tight matching, connecting surfaces between said inner connecting rod and said sleeve are polished in advance in order to get smooth surfaces.