▎ 摘　　要

In this paper a new fast designing approach for planar filtering leaky-wave antennas, is proposed. The introduced designing procedure, is based on the method of Moments, and fully implemented in MATLAB. In addition to novelty, the introduced designing procedure, can add any desired filtering property to a wideband LWA without using additional circuits, and design LWAs without periodical changes; so it is powerful than the Floquet method. Furthermore, the impedance matching of leaky-wave antenna with photomixer is another challenging issue that has been addressed in this article, for the first time. The proposed antenna is a slotted microstrip with a non-periodic pattern, unlike all known LWAs. Graphene is used for the micro ribbon, instead of the electric conductor, because of its wonderful properties. The suitable pattern of slots on the graphene microstrip, is obtained using optimization performed by MATLAB Genetic algorithm tool, to have an appropriate radiation, and filtering properties simultaneously. The usefulness and performance of the presented designing approach, is verified in one example. It has been illustrated that it has additional features, in comparison with one of the new similar antennas. Moreover, the result obtained by introduced strategy is compared with that obtained by CST for validation.