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In this paper a dome-dipole antenna for ultra wideband operation is presensted. The antenna is a 3D generalization of the wideband flare dipole. For wideband impedance matching, the outer surface of the dome dipole was exponentially tapered. This design also led to a more uniform radiation pattern over larger bandwidth. Additionally, a 24" wide and 20" tall prototype of the dome-dipole antenna...
The ultra-wideband wireless personal area networks are expected to be most commonly employed in desktop environments. This paper presents a measurement campaign conducted on a typical office desk. A pair of omnidirectional UWB antennas and a vector network analyzer were used to measure the impulse responses over a frequency range spanning from 6 GHz to 8.5 GHz, in accordance with the UWB regulations...
This paper presents the design, the analysis and the characterization of a 2 times 2 UWB patch array on the 3.1 - 5.1 GHz frequency bandwidth, for very high data rate applications using Radio Over Fibre. The topic of the low profile UWB antenna with broadside, directive and frequency independent pattern is addressed. The main contribution of this work consists in using mutual coupling between elements...
This paper presents a broadband omnidirectional vertically polarized antenna of only a one eighth wavelength associated to the lowest frequency. This antenna is composed of a conical monopole with metallic parasitic elements, a capacitive disk and a dielectric substrate placed above a square ground plane. This structure provides broadband performances and omnidirectional radiation patterns over the...
Wireless broadband communications such as UWB, WiMAX et. al. have been put into services in Japan, in order to realize high-speed transmission systems. Such a system enables to transmit movies from a person to the other person in the winking of an eye. To realize such wireless broadband communications, wideband antennas have been required. This paper describes the bandwidth limitations of ultra-wideband...
Microstrip Antennas (MSAs) consist of a metallic radiating patch on one side of thin dielectric substrate and other side is ground plane. Most important advantages of MSAs are low profile, light weight and compatibility with integrated circuit technology. MSAs are used in mobile communication, satellite communication, radar, direct broadcasting, global positioning systems and remote sensing. The major...
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