Design of frequency reconfigurable triband antenna using capacitive loading for wireless communications

Abstract

A frequency reconfigurable multiband antenna using lumped capacitors has been designed and characterized. By embedding a pair of capacitors in the two opposite corners, the proposed patch can easily generate and control two resonant frequencies besides the main resonant frequency of the reference structure at F1=2.45GHz. When varying capacitance values from 0.845 to 3.454pF, tuning ranges of 990MHz (for the frequency F2) and 670MHz (for the frequency F3) can be achieved. Prototypes were realized and characterized. Simulated and measured results are presented and discussed.