Communications: radio wave antennas – Antennas – Plural separate diverse type
Reexamination Certificate
2005-08-09
2005-08-09
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
Plural separate diverse type
Reexamination Certificate
active
06927737
ABSTRACT:
An object of the present invention is a small composite antenna that is capable of operating in a plurality of different frequency bands. A first antenna2constituting a GPS circularly polarized loop antenna is formed on a dielectric substrate10. A second antenna3constituting an ETC square patch antenna is formed on substantially the same axis as the first antenna2. An earth pattern is formed in the underside of the dielectric substrate10, and a recess in whose bottom face an earth pattern is formed so as to lie opposite the second antenna3is provided. An arc-shaped feed pattern4is electromagnetically coupled to the first antenna2so as to supply electricity thereto, whereby this antenna is made to operate as a right-handed circularly polarized antenna. Electricity is supplied by a coaxial cable to the second antenna3to cause same to operate as a right-handed circularly polarized antenna.
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H. Nakano, et al., “A Low-Profile Conical Beam Loop Antenna with an Electromagnetically Coupled Feed System,” IEEE Transactions on Antennas and Propagation, vol. 48, No. 12 Dec. 2000 pp. 1864-1866.
T. Hikokubo, et al., “A Study on Dual-resonant Antenna for Wireless Multi-Terminal (B-1-174),” Electronic Information Communication Institute General Meeting 2001 p.192.
Cao Huedung X.
Hahn Kirk
Nippon Antena Kabushiki Kaisha
Wong Don
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