Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2006-03-16
2008-11-04
Phan, Tho G (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S853000
Reexamination Certificate
active
07446710
ABSTRACT:
An array antenna comprises a first substrate comprising a first plurality of ceramic layers; a second substrate comprising a second plurality of ceramic layers; a bottom ground plane stacked on the bottom of the second ceramic substrate; a plurality of quasi-cavity-backed patch antennas mounted on a top surface the first substrate, each of the patch antennas including a radiating element and two grounded grid-like conductor walls; and a mixed feeding network coupled to each of the patch antennas. The array antenna working at mm-wave frequency band can provide high radiation efficiency and low loss from feeding network by using quasi-cavity-backed patch elements and a mixed feeding network configuration.
REFERENCES:
patent: 5497164 (1996-03-01), Croq
patent: 5708444 (1998-01-01), Pouwels et al.
patent: 5880694 (1999-03-01), Wang et al.
patent: 6809688 (2004-10-01), Yamada
patent: 7058362 (2006-06-01), Khorrami et al.
patent: 1 120 856 (2001-01-01), None
patent: 11-298241 (1999-10-01), None
PCT written opinion of the international searching authority issued on Jun. 29, 2006.
Huang Yong
Wu Ke-Li
Knobbe Martens Olson & Bear LLP
Phan Tho G
The Chinese University of Hong Kong
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