گوهر ورامینی - استادیار, گروه مهندسی برق، واحد بیضا،دانشگاه آزاد اسلامی، بیضا، ایران

this paper, a Modified aperture antenna is introduced and designed using feeding by the adjacent couple method. This structure covers multi-frequency ability, improves gain and efficiency, and reduces antenna size remarkably. The proposed antenna comprises meta-material cellular units and a new fractal microstrip antenna. The indirect feeding technique in the proposed antenna increases bandwidth, design capability in the array antennae, a reduction of return losses and the unwanted radiations. The structure has an acceptable multi-band bandwidth. In addition, by increasing the frequency of the fractal antenna in smaller resonant frequencies and in a fixed frequency, the smaller antenna size and reduction of mutual promotion are covered. Finally, the results of the return loss and radiation pattern in two modes of simulation and production make a relative suitable match. The desired antenna is designed according to the logarithmic triangular patch by coupling with the adjacent feeder line. In order to reduce the number of array elements, the scale factor of K is used, while compensation is applied at the end of the feeder line, which leads to an increase in the antenna efficiency.

Modified aperture antenna", Incomplete Land Plates", ", Miniaturization"