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Wideband double-dipole yagi-uda antenna fed by a microstrip-slot coplanar stripline transition

Authors
Ta, S.X.Choo, H.Park, I.
Issue Date
2012
Citation
Progress In Electromagnetics Research B, no.44, pp.71 - 87
Journal Title
Progress In Electromagnetics Research B
Number
44
Start Page
71
End Page
87
URI
https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/19115
DOI
10.2528/PIERB12080605
ISSN
1937-6472
Abstract
This paper describes a wideband double-dipole Yagi-Uda antenna fed by a microstrip-slot coplanar stripline transition. The conventional dipole driver of a Yagi-Uda antenna is replaced by two parallel dipoles with different lengths to achieve multi-resonances, and a small, tapered ground plane is used to allow flexibility in the placement of a pair of reflectors for effective reflection of back-radiated electromagnetic waves. The measured bandwidth of the antenna was 3.48-8.16 GHz for a-10 dB reflection coe±cient, with a flat gain of 7:4 ± 0:4 dBi. A two-element array of these antennas was also constructed, with a center-to-center spacing of 36mm (0:72λoat 6 GHz) and a common reflector between the elements. The two-element array had a measured bandwidth of 3.56-792 GHz, a gain of 8.40-10.43 dBi, a cross-polarization level of <-15 dB, and a mutual coupling of <-16 dB within the impedance-matching bandwidth.
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