Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2006-01-10
2006-01-10
Dinh, Trinh V (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S7000MS, C343S860000, C029S600000
Reexamination Certificate
active
06985114
ABSTRACT:
A multi-frequency antenna having a small size, light weight and excellent productivity and being suitable for transmitting and receiving electric waves in Ghzband, is constituted such thatan orthogonal coordinate X-Y is set,a first antenna element21having an electric wavelength of λa/4 and a second antenna element22having an electric wavelength of λb/4 are placed in parallel to the X axis respectively,one edge of each of said elements is positioned near the Y axis,said two elements are connected electrically with a ground plate8by a short-circuit line4along the Y axis,a point where an impedance is 50 Ω (code50) of the first antenna element21and a point where an impedance is 50 Ω of the second antenna element22are made to be a power feed point respectively, andsaid power feed points are connected with a coaxial cable7through a power feed line6.
REFERENCES:
patent: 6184845 (2001-02-01), Leisten et al.
patent: 6208311 (2001-03-01), Reece et al.
patent: 6362793 (2002-03-01), Sawamura et al.
patent: 6690336 (2004-02-01), Leisten et al.
patent: 6762729 (2004-07-01), Egashira
patent: 2004/0253972 (2004-12-01), Iwai et al.
Bacon & Thomas PLLC
Dinh Trinh V
Ho Binh Van
Houkou Electric Co., Ltd.
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