Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2006-03-21
2006-03-21
Dinh, Trinh Vo (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S846000, C343S850000
Reexamination Certificate
active
07015862
ABSTRACT:
The invention provides a small multimode antenna capable of commonly using a single feeding point at a plurality of frequencies. The antenna includes a radiating conductor1disposed above a ground conductor6and distributed-constant circuits2and3coupled to the radiating conductor. Each of the distributed-constant circuits is constructed by a transmission line and has a branch. One end of the radiating conductor and one end of the distributed-constant circuit2are connected to each other to be a connection point and, further, the other end of the radiating conductor and one end of the distributed-constant circuit3are connected to each other. The connection point is a single feeding point9using the ground conductor as an earth. The distributed-constant circuits2and3are designed as an equivalent circuit in which different stubs are connected in parallel with a transmission line, and impedance matching at a plurality of frequencies is realized at the feeding point.
REFERENCES:
patent: 3753815 (1973-08-01), Burton et al.
patent: 6624795 (2003-09-01), Boyle
patent: 6639555 (2003-10-01), Kane et al.
patent: 6903688 (2005-06-01), Edvardsson
patent: 2003/0169204 (2003-09-01), Saito
patent: 61-265905 (1986-11-01), None
patent: 01-158805 (1989-06-01), None
Aoyama Hiroyuki
Takei Ken
Dinh Trinh Vo
Hitachi , Ltd.
Hitachi Metals Ltd.
Miles & Stockbridge P.C.
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