NDLI: Wideband compact Vivaldi Antenna loaded with dielectric lens for millimeter-wave applications

Content Provider	IEEE Xplore Digital Library
Author	Ashraf, M.A. Haraz, O.M. Sebak, A.R. Alshebeili, S.
Copyright Year	2015
Description	Author affiliation: KACST Technol. Innovation Center in Radiofreq. & Photonics for the e-Soc. (RFTONICS), King Saud Univ., Riyadh, Saudi Arabia (Ashraf, M.A.; Haraz, O.M.) \|\| Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada (Sebak, A.R.; Alshebeili, S.)
Abstract	Wideband Antipodal Vivaldi Antenna (AVA) loaded with dielectric lens for fifth generation gigabit communication and millimeter-wave (MMW) imaging system is presented. The simulated results demonstrated that proposed antenna can be operated from 10 GHz up to 65 GHz band showing 146% fractional bandwidth. The designed antenna is considered for transmission of short time duration pulses covering 27-33 GHz frequency band. We examined time domain performance of our proposed AVA for an ultra-short 16 ps fifth derivative Gaussian pulse excitation. We found up to 11% improvement in pulse radiation efficiency for the $5^{th}$ derivative Gaussian pulse excitation compared to conventional $1^{st}$ order Gaussian. Moreover, gain improvement is up to 7 dB by loading half spherical dielectric lens over AVA. Further analysis is done by calculation of energy pattern and pulse fidelity factor (PFF) for both kinds of pulse excitations. Within 3-dB beamwidth of the proposed antenna PFF value is found more than 90%. The AVA with lens reduces the 3 dB energy beamwidth from ±18° to ±8° owning side lobe levels less than -20 dB. The proposed antenna is compact in size with physical dimension of 31×38 $mm^{2}.$
Sponsorship	IEEE
Starting Page	2061
Ending Page	2062
File Size	210196
Page Count	2
File Format	PDF
e-ISBN	9781479978151
DOI	10.1109/APS.2015.7305420
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-19
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lenses Vivaldi antennas Dielectrics Millimeter wave technology Wideband Transmitting antennas
Content Type	Text
Resource Type	Article

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