Log periodic antenna

Details Log periodic antenna Log periodic antenna

2011-03-15

2011-03-15

Choi, Jacob Y (Department: 2821)

Communications: radio wave antennas

Antennas

Logarithmically periodic

C343S745000, C343S7000MS

Reexamination Certificate

active

07907098

ABSTRACT:
A log periodic antenna comprises a plurality of radiating elements in an end fire configuration, each radiating element in the plurality of radiating elements comprises a conductor, and at least two shunt inductances connected to the conductor; a substrate connecting the plurality of radiating elements; and a log periodic stripline feed pathway superimposed on the substrate. The height of each radiating element of the plurality of radiating elements is about one hundredth the size of the wavelength and the length is about 0.14 the size of the wavelength at the lowest operating frequency of the log periodic antenna. The plurality of radiating elements is configured to produce impedance and radiation characteristics that are regularly repetitive as a logarithmic function of an excitation of frequency without performance degradation.

REFERENCES:
patent: 3389396 (1968-06-01), Minerva et al.
patent: 4973972 (1990-11-01), Huang
patent: 5111211 (1992-05-01), Dahlberg
patent: 5648786 (1997-07-01), Chung et al.

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