Hybrid fractal cross antenna

A new fractal geometry of the cross antenna, which belongs to the traveling -wave antenna class and follows the contorts of a cross, is presented. In t he conventional type of traveling-wave antenna, the total length of the rad iating conductor increases as the order of fractal expansion increases, but this increase of the length of the current path degrades the performance o f the antenna. To reduce the antenna performance degradation, a hybrid acra l antenna is presented, which divides the entire fractal structure into som e smaller ones, and connects each smaller fractal group with a power divide r circuit. The secondarily thirdly, and fourthly expanded hybrid fractal cr oss antennas are fabricated, and their performances are examined by measure ments The influences of the fractal order on the antenna performance are ex amined. (C) 2000 John Wiley & Sons, Inc.