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Compact, Dual-Polarized UWB-Antenna, Embedded in a Dielectric

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3 Author(s)
Adamiuk, G. ; Karlsruhe Inst. of Technol. (KIT), Karlsruhe, Germany ; Zwick, T. ; Wiesbeck, W.

A compact dual-polarized antenna is described for ultrawideband (UWB) applications. The main features of the antenna, besides an ultrawidebandwidth are low cross-polarization and small dimensions. The feed of the antenna is based on the tapered slot antennas, enclosed in a dielectric. The new antenna concept, including the feed of the antenna for dual-polarization and its integration, is described in detail. Prototypes are shown and their performances are demonstrated, based on simulation and measurement results in frequency and time domain. The antenna prototype input match is better than -10 dB, a maximal gain of 10.5 dBi and a mean polarization decoupling of approximately 17 dB in the main beam direction in the 3.1-10.6 GHz UWB band are achieved. In the time domain a peak value of 0.4 m/ns, a full width at half maximum of 100 ps and a ringing of 145 ps are measured. With a maximum antenna diameter of 35 mm and 53 mm length this new antenna is also suited for UWB antenna arrays.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:58 ,  Issue: 2 )