Improved Design of an Ultra Wideband Universal Serial Bus Device Mounted Antenna Based on Comparative Radiation Efficiency Measurements
Pires, N.
; Letizia, M.
; Boyes, S. B.
; Lu, Y. L.
; Skrivervik, A.
;
Moreira, A. A.
Improved Design of an Ultra Wideband Universal Serial Bus Device Mounted Antenna Based on Comparative Radiation Efficiency Measurements, Proc European Conf. on Antennas & Propagation - EUCAP, Rome, Italy, Vol. --, pp. 1430 - 1434, April, 2011.
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Abstract
The present paper reports a planar, microstrip-fed Ultra Wideband (UWB) monopole antenna designed to operate inside a Universal Serial Bus (USB) dongle. The antenna was dielectrically loaded with a sandwich fabricated in commercial substrate. This design improves on a coaxial fed monopole presented earlier by showing a better matching through the UWB [3.1 - 10.6] GHz band. Wideband efficiency measurements were conducted, using the reverberation chamber technique and a cavity-based approach, called the source-stirred method. The dielectric loading implementation described here has a small impact on antenna radiation efficiency, with the loaded prototype having a figure higher than 78% over the UWB band.
