Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2007-08-21
2007-08-21
Phan, Tho (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S846000
Reexamination Certificate
active
11362779
ABSTRACT:
The present invention relates to a reflecting board for a microstrip reflectarray antenna and, more particularly, to a reflecting board with variable slot size that can improve the design flexibilities of the reflecting board and reduce the sensitivity to the manufacturing tolerances of the microstrip reflectarray antenna. The reflecting board comprises a bottom substrate having a first lower surface, and a top substrate. Plural first microstrip antenna patches, and plural second microstrip antenna patches with rectangular slots are disposed on the upper surface and the second lower surface of the top substrate, respectively. The area of the second microstrip antenna patches is larger than that of the first microstrip antenna patches. Besides, the ratio of the maximum border-length of the rectangular slot to the maximum border-length of the corresponding second microstrip antenna patch is identical for each second microstrip antenna on the second lower surface of the top substrate.
REFERENCES:
patent: 4977406 (1990-12-01), Tsukamoto et al.
patent: 5001492 (1991-03-01), Shapiro et al.
patent: 6366244 (2002-04-01), Fernandes
patent: 6424299 (2002-07-01), Cha et al.
patent: 7098854 (2006-08-01), Herrick
Chang The-Nan
Chen Bor-Tsong
Phan Tho
Tatung Company
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