GDL

Journal from gdlhub / 2018-05-30 12:00:51
Oleh : M A Zakwan, S A Hamzah, S M Shah, K N Ramli, M S Zainal, L Audah, N Abdullah, A Ubin, F C Seman, A K Anuar, Adeeb Salh, M Esa, N N N Abd Malik, Telkomnika
Dibuat : 2018-05-30, dengan 1 file

Keyword : Tapered balun; UWB elliptical dipole; planar antenna; 3-D antenna;
Url : http://journal.uad.ac.id/index.php/TELKOMNIKA/article/view/8360
Sumber pengambilan dokumen : WEB

This work presents a broadband tapered balun with different sizes using nonlinear transition particularly suitable for planar and three-dimensional (3-D) dipole antennas for ultra-wideband (UWB) applications such as communication, radar systems and geolocation precision. Four baluns with wideband microstrip-to-parallel-strip transition using an elliptical structure for an elliptical dipole antenna are proposed. The initial balun structure consists of a nonlinear profile with a quarter-wavelength for both height and width. By studying the current distributions at the balun surface, it can be reduced to 25%, 50% and 75% from the original size. Measured results based on the reflection coefficients for all baluns are shown to be better than -10 dB from 1.0 GHz to 10 GHz. These baluns are integrated with an elliptical dipole which acts as a feeding circuit. Eight set of antennas with a planar and 3-D configurations with four different sizes are proposed in this work. The planar configurations are named as Planar 1, Planar 2, Planar 3 and Planar 4 while the 3-D configurations are named as 3D Dipole 1, 3D Dipole 2, 3D Dipole 3 and 3D Dipole 4, respectively. The results show that all antennas with the proposed baluns operates within the UWB frequency range.

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