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International Journal of Antennas and Propagation
Volume 2017 (2017), Article ID 6259682, 7 pages
https://doi.org/10.1155/2017/6259682
Research Article

A Printed LPDA Antenna Fed by a Microstrip Line to Double Sided Parallel Strip Line from Backside

College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, China

Correspondence should be addressed to Zhou Yang; moc.361@epoletnagnayuohz

Received 3 May 2017; Revised 18 August 2017; Accepted 29 August 2017; Published 8 October 2017

Academic Editor: Giorgio Montisci

Copyright © 2017 Zhou Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel planar printed log-periodic dipole array (LPDA) antenna fed by tapered microstrip line (MSL) to double sided parallel strip line (DSPSL) is proposed in this paper. The proposed antenna adopts MSL feeding approach from backside. Using this feeding technique makes the printed LPDA antenna easier to be integrated into radio frequency (RF) circuits. In this paper, four layers are used to construct the antenna. The four layers of the printed LPDA antenna are printed on three thin dielectric substrates which are integrated together. To validate this approach, a printed LPDA antenna is simulated and fabricated for operating in the S and C bands (2.5–6 GHz). The antenna showed a good result over the whole frequency range with 2 : 1 VSWR, an average gain of 6.5 dB, and stable radiation patterns. The measured results are in very good agreement with simulations.