Design of Narrowband Frequency-Tunable Antenna

In this paper, a narrowband frequency-tunable antenna is proposed. The tuning operation is achieved by integrating a variable capacitor in a narrowband antenna. Both simulated and measured results of the designed antenna are presented and discussed. The experimental results show that very narrowband resonant frequency can be accurately tuned in a large frequency range. Hence, the proposed design can be a good candidate for modern wireless communication systems.