Communications: radio wave antennas – Antennas – Plural antennas
Reexamination Certificate
2007-09-11
2007-09-11
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Plural antennas
C165S139000
Reexamination Certificate
active
11423616
ABSTRACT:
A phased array antenna apparatus has a plurality of circuit portions which are each coupled to a respective antenna element. Capillary pressure of a cooling fluid within a wick in a loop is utilized to urge the fluid to travel around the loop, the wick being disposed in the region of the circuitry. In a variation, there are plural wicks in respective evaporators, and cooling fluid is distributed among the evaporators through a series of T-junctions. In another variation, cooling fluid is distributed to a plurality of evaporators in a sequence corresponding to a progressive increase in the respective amounts of heat accepted by the evaporators from structure being cooled.
REFERENCES:
patent: 5816313 (1998-10-01), Baker
patent: 5829519 (1998-11-01), Uthe
patent: 6205803 (2001-03-01), Scaringe
patent: 6889754 (2005-05-01), Kroliczek et al.
patent: 7061446 (2006-06-01), Short et al.
patent: 2005/0061487 (2005-03-01), Kroliczek et al.
U.S. Appl. No. 11/423,616, filed Jun. 12, 2006, entitled “Method and Apparatus for Controlling Temperature Gradients within a Structure Being Cooled”, by Byron Elliott Short, Jr. and Jay M. Ochterbeck, 41 pgs.
Ochterbeck Jay M.
Short, Jr. Byron Elliott
Baker & Botts L.L.P.
Chen Shih-Chao
Raytheon Company
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