A novel omni-directional UWB biconical antenna with band-notched

Abstract

A novel omni-directional Ultra-Wide Band (UWB) biconical antenna with band-notched is described. Firstly, the biconical antenna in the shape of two kinds of bicone placed above a flat ground plane is designed. The antenna operates from 2.4-20 GHz with low Voltage Standing Wave Ratio (VSWR<2), excluding a band-notched frequency at 5-7GHz. Then in order to improve the structure of the ground plane for miniaturization without degrading the VSWR, ground plane shaping is introduced leading to an antenna that operates from 2.4-20 GHz with low VSWR (<2) too. The biconical antenna is fed by a coaxial probe through a SMA connector. The length of the proposed biconical element above the ground plane is slightly less than O /4 at the lowest frequency in the band. Simulation results for VSWR and radiation pattern of the three antennas are presented and discussed.

Design of Dual Band Sleeve Dipole Antenna for Mobile Jammer Applications

“…Overall, the measured and simulated radiation pattern are in good agreement. The band 1-1.7 GHz has been notched [5]. The wireless communication in this band is not jammed when the antenna is used as a jammer applications.…”

“…To use two or more bands into a single device, dual and multi-band antennas play a very important role, because it require less space and having low cost as compared with different antennas operating at different bands. That is why a multi-band sleeve antenna is widely used in mobile communication systems and broadcast systems, primarily due to its omnidirectional pattern and ease of fabrication [1][2][3][4][5][6]. Different antennas has been proposed such as PIFA antenna [7], loop antenna [8] and slot antenna [9,10] to provide dual band characteristics.…”

Dual band sleeve dipole antenna for WLAN applications

“…Therefore, the demands of multi-band and ultra wide band antennas are also increasing day by day. In this paper a multi-band sleeve antenna is proposed which is widely used in communication systems primarily due to its excellent omnidirectional radiation pattern and ease of fabrication [1][2][3][4][5][6]. Different antennas design engineers proposed different antennas such as PIFA antenna [7], loop antenna [8] and slot antenna [9,10] to provide dual band and multi-band characteristics.…”