Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Reexamination Certificate
2007-11-06
2007-11-06
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
C343S812000, C343S817000
Reexamination Certificate
active
11402810
ABSTRACT:
A radiator includes two radiating elements having a shape symmetrical with respect to an axis, and a transmission line portion connecting the tip end portions of these two radiating elements to each other. The radiating element has at least part of outer shape formed such that its distance from the axis increases with increasing distance from a midpoint of a line segment joining feed points to each other along the axis. Two radiator having such a shape are arranged along the receiving direction of electric waves and are fed with a phase difference, thereby realizing a miniaturized high-performance antenna apparatus.
REFERENCES:
patent: 5274391 (1993-12-01), Connolly
patent: 6606067 (2003-08-01), Oh et al.
patent: 6859182 (2005-02-01), Horii
patent: 2003-8328 (2003-01-01), None
Birch & Stewart Kolasch & Birch, LLP
Chen Shih-Chao
Dx Antenna Company Limited
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