Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Reexamination Certificate
2006-11-20
2011-12-20
Duong, Dieu H. (Department: 2821)
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
C343S7000MS
Reexamination Certificate
active
08081135
ABSTRACT:
The invention consists of an antenna array, for the reception of two frequency bands, comprising two pairs of radiating elements and an network for excitation of these elements for the reception of one of the bands. The radiating elements are positioned so as to free the center of the array to allow colocalized reception of the other band. The excitation network comprises hybrid elements so as to introduce a certain phase shift between the radiating elements allowing a dual circular polarization. This network must comply with two constraints: The phase shift introduced between the hybrids must be equal to the phase shift of the hybrid modulo 2integer. and the length of the line L1placed between the first hybrid H1and the first patch PA1is such that it introduces a phase shift equal to π modulo 2integer.
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Patent Abstracts of Japan, vol. 009, No. 131, Jun. 6, 1985 & JP 60-018004.
Search Report Dated Feb. 9, 2007.
Chambelin Philippe
Minard Philippe
Pintos Jean-Francois
Duong Dieu H.
Navon Jeffrey M.
Shedd Robert D.
Thomson Licensing
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