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http://dx.doi.org/10.12673/jant.2022.26.5.344

Compact UWB Log Periodic Right Triangle-Shaped Dipole Array Antenna Appended With Strips  

Yeo, Junho (School of Artificial Intelligence, Daegu University)
Lee, Jong-Ig (Department of Electronics Engineering, Dongseo University)
Publication Information
Journal of Advanced Navigation Technology / v.26, no.5, 2022 , pp. 344-349 More about this Journal
Abstract
A compact LPDA antenna consisting of right triangle-shaped dipole elements appended with strips is proposed for UWB applications. First, right triangle-shaped dipole elements are used instead of conventional strip dipole elements to reduce the width of the LPDA antenna. Second, the spacing between the LPDA elements is decreased to reduce the length of the LPDA antenna. Finally, strips are appended at the ends of the right triangle-shaped dipole elements in order to further reduce the width of the antenna. A prototype of the proposed antenna with 16 elements and gain > 4 dBi is fabricated on an FR4 substrate with dimensions of 44 mm×30 mm. Measured frequency band of the fabricated antenna is 2.99-14.76 GHz for a VSWR < 2, which ensures UWB operation, and measured gain range is 4.0-5.5 dBi with a front-to-back ratio larger than 10 dB. The length and width of the proposed compact LPDA antenna are reduced by 40.9% and 20.6%, respectively, compared to the conventional LPDA.
Keywords
Right triangle-shaped dipoles; Appended strips; Compact; Log periodic dipole array (LPDA); UWB;
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