Reduced sidelobe four-beam antenna array fed by modified Butler matrix |
| |
Authors: | Wincza K Gruszczynski S Sachse K |
| |
Affiliation: | Inst. of Telecommun., Wroclaw Univ. of Technol., Poland; |
| |
Abstract: | A novel four-beam antenna array fed by a modified 4/spl times/8 Butler matrix is proposed. Four 180/spl deg/ directional couplers in conjunction with a 4/spl times/4 Butler matrix are applied to provide a tapered excitation of a linear eight-element switched-beam antenna array. Sidelobes as low as -20 dB for all four beams have been both theoretically and experimentally achieved. A proposed technique of antenna element rotation simplifies the design of a feeding network. |
| |
Keywords: | |
|