Gain compensation of a printed log periodic dipole array antenna by cutting-away the dielectric between radiating elements

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Daniel Oloumi, Mohammad Mohammadirad, Reza Jokar Naraghi
Title: Gain compensation of a printed log periodic dipole array antenna by cutting-away the dielectric between radiating elements
Conference name: 5th European Conference on Antennas and Propagation, EUCAP
Year: 2011
Pagination: 1284-1286
ISBN: 978-888202074-3
City: Rome
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Electrical Engineering (Sektionen för ingenjörsvetenskap - Avd. för elektroteknik)
School of Engineering S-371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/ing/
Language: English
Abstract: This paper introduces a simple technique to compensate the lost gain due to the dielectric loss of the printed log periodic dipole array (PLPDA) antenna. First, a simple Printed LPDA is designed then by removing the dielectric between radiating elements, the PLPDA is changed into Cut PLPDA (CPLPDA). This change causes to compensate antenna gain by 1 dB approximately. Moreover, a simultaneously weight reduction of more than half is likely to happen. Observing the characteristics of both antennas shows that main antenna properties such as radiation pattern, and return loss are maintained during this modification. The proposed structures are simulated by CST Microwave Studio software and are fabricated on both sides of FR4 substrate with =4.5 and 2.4mm thickness. At the end, the simulated results are confirmed by the measured results with excellent agreements.
Subject: Signal Processing\General
Keywords: Antenna gains, Antenna properties, CST microwave studio, FR4 substrates, Log-periodic dipole array antennas, Log-periodic dipole arrays, Measured results, Radiating elements, Return loss, Simulated results, Weight reduction
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