A Low Frequency Super Wideband Planar Sleeve Monopole Antenna with Lumped Elements Loading

摘要

In this paper, a low frequency super wideband sleeve-like monopole antenna with lumped elements loading is proposed for HF, VHF and UHF applications. The proposed antenna fed by coplanar waveguide (CPW) is composed of T-shaped radiation patch and sleeve structure, which is also loaded by some lumped elements to increase its bandwidth. The entire size of the devised antenna is $36imes 35 ext{cm}^{2} (0.0120lambdaimes 0.0117lambda)$, where $lambda$ is the free-space wavelength at the lowest operation frequency. The designed antenna is constructed and simulated by using the HFSS. The simulated results show that a −10 dB fractional bandwidth of 182.3% ranging from 10 MHz to 422 MHz is obtained for the developed antenna.