Log-periodic dipole array antenna

Details Log-periodic dipole array antenna Log-periodic dipole array antenna

2007-08-21

2007-08-21

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

Logarithmically periodic

C343S821000

Reexamination Certificate

active

11454729

ABSTRACT:
A log-periodic dipole array antenna including a dielectric substrate, and antenna elements, symmetrical microstrip lines and baluns disposed on two corresponding surfaces of the substrate is provided. The antenna elements on each surface are connected to one side of the corresponding symmetrical microstrip line, respectively. The width of at least one antenna element on each surface is broadened gradually outwards from the side of the antenna element, which is connected to the corresponding symmetrical microstrip line. In addition, the baluns are connected to the ends of the corresponding symmetrical microstrip lines, respectively. The antenna elements on one surface are in a mirror-image relation to those on the other surfaces. The log-periodic dipole array antenna features increased broadband with a thin and compact-size, better margin in design to meet different bandwidth requirements.

REFERENCES:
patent: 5212494 (1993-05-01), Hofer et al.
patent: 6734827 (2004-05-01), Killen et al.
patent: 6952189 (2005-10-01), Engargiola et al.

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