A Spurious-Free 5.8 GHz Circular Patch Antenna for Rectenna Applications

摘要

KEYWORDS In this paper, a 5.8 GHz capacitive coupled circular patch antenna having harmonic suppression capability has been designed and fabricated for wireless power transfer applications. Harmonics suppression has been achieved up to the fourth order of the fundamental operating frequency by using two stubs and one split circular slot. Such a type of simple geometry for harmonic suppression is definitely a potential advantage as compared to the earlier published similar type of work where complex geometry has been involved for harmonic suppression. Surface current distributions on the antenna have been shown at harmonic frequencies to illustrate the harmonic suppression graphically. Model equivalent circuit of the presented antenna also has been shown to explain the harmonic suppression functionality in detail. Proposed antenna has been fabricated and the simulation results are experimentally verified.