Compact antenna having coaxial helical elements with ends...

Details Compact antenna having coaxial helical elements with ends... Compact antenna having coaxial helical elements with ends...

2006-06-28

2009-06-09

Nguyen, Hoang V (Department: 2821)

Communications: radio wave antennas

Antennas

Spiral or helical type

C343S702000

Reexamination Certificate

active

07545340

ABSTRACT:
An antenna includes outer and inner elements, one of which is a signal line and the other of which is a ground line. Each of the outer and inner elements is a helical element having helical portions. The inner element is arranged inside the outer element such that the outer and inner elements are spaced from each other. An axis of the outer element is parallel to that of the inner element.

REFERENCES:
patent: 4270128 (1981-05-01), Drewett
patent: 5982330 (1999-11-01), Koyanagi et al.
patent: 6952186 (2005-10-01), Saito et al.
patent: 2002/0055336 (2002-05-01), Hong
patent: 2003/0169209 (2003-09-01), Ohara et al.
patent: 2002-171127 (2002-06-01), None
patent: 2003-152427 (2003-05-01), None

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