A transmission line circuit-oriented approach for miniaturization of a log-periodic dipole array (LPDA) antenna

Author

Almalkawi, Mohammad J. ; Cross, Lee W. ; Alshamaileh, Khair A.

Author_Institution

Directed Energy, Inc., Lexington, KY, USA

fYear

2014

fDate

3-6 Aug. 2014

Firstpage

73

Lastpage

76

Abstract

A miniaturized planar log-periodic dipole array (LPDA) antenna is presented. Antenna miniaturization is accomplished by replacing the uniform dipole elements of the conventional LPDA antenna with elements that possess variable-impedance profiles governed by a truncated Fourier series. Conventional and miniaturized LPDA antennas exhibiting 7 dB end-fire gains are designed to operate over the frequency range of 2 to 4 GHz. A 32 % reduction in dipole arm length was achieved. Full-wave simulation results show stable directional radiation patterns, excellent front-to-back ratio over the designed impedance bandwidth, and minimal degradation in the overall electrical performance.

Keywords

Fourier series; antenna radiation patterns; dipole antenna arrays; log periodic antennas; transmission lines; LPDA antennas; antenna miniaturization; dipole arm length; directional radiation patterns; excellent front-to-back ratio; full-wave simulation; miniaturized planar log-periodic dipole array antenna; transmission line circuit-oriented approach; truncated Fourier series; uniform dipole elements; variable-impedance profiles; Antenna arrays; Arrays; Bandwidth; Broadband antennas; Dipole antennas; Impedance; Fourier based antenna radiators; antenna miniaturization; log-periodic dipole array (LPDA) antenna; planar;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2014 IEEE 57th International Midwest Symposium on

Conference_Location

College Station, TX

ISSN

1548-3746

Print_ISBN

978-1-4799-4134-6

Type

conf

DOI

10.1109/MWSCAS.2014.6908355

Filename

6908355