Harmonics are harmful and undesirable in many applications. Fractal technology can be embedded into an antenna due to its high ability in reducing the physical size of the antenna, increasing its operating bandwidth and directivity. However, such introduction of fractals can cause significant undesired harmonic problems associated with higher order modes of the antenna. In this paper, the design of an active harmonic suppressed small fractal dipole antenna named TMFDB25 is presented. It has tunable capability of a reconfigurable operation within an observed range of 400 MHz to 2 GHz. The switchable small fractal dipole antenna is integrated with open circuit stubs and RF PIN diodes. The proposed structure has diode biasing circuit that influences the actual performances of the antenna. These results are the most reliable obtained. The simulation results showed that the antenna has a capability to tune single operating frequency out of four at a time, simultaneously, suppressing the higher order mode.
[1]
Shyh-Kang Jeng,et al.
Design of reconfigurable antennas based on an L-shaped slot and PIN diodes for compact wireless devices
,
2009
.
[2]
D.E. Anagnostou,et al.
A Coplanar Reconfigurable Folded Slot Antenna Without Bias Network for WLAN Applications
,
2009,
IEEE Antennas and Wireless Propagation Letters.
[3]
Tae-Yeoul Yun,et al.
A Reconfigurable PIFA Using a Switchable PIN-Diode and a Fine-Tuning Varactor for USPCS/WCDMA/m-WiMAX/WLAN
,
2010,
IEEE Transactions on Antennas and Propagation.
[4]
S. A. Hamzah,et al.
Miniaturized single band microwave fractal meander dipole antenna and its tunable configurations
,
2010,
2010 IEEE Antennas and Propagation Society International Symposium.