Multiple-frequency common antenna

Details Multiple-frequency common antenna Multiple-frequency common antenna

2006-12-05

2006-12-05

Nguyen, Hoang V. (Department: 2821)

Communications: radio wave antennas

Antennas

Antenna components

C343S7000MS, C343S853000, C343S729000, C343S829000, C343S822000, C343S846000

Reexamination Certificate

active

07145518

ABSTRACT:
A multiple-frequency common antenna has a first substrate sheet and a second substrate sheet respectively structured by an HIP consisting of a metal plate, small metal plates disposed in two dimensions and linear metal bars connecting these elements. The antenna restricts propagation of surface currents of the first and second frequency bands which are not overlapping with each other. An inverse L-shape antenna and a monopole antenna which are fed with a center conductor and an external conductor of the coaxial line respectively operate as the antenna on the first substrate sheet in the first frequency band and second frequency band. The second substrate sheet does not propagate the radiated wave of the monopole antenna, thereby avoiding unwanted re-radiation.

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D. Sievenpiper et al., “Antennas on High-Impedance Ground Planes”,IEEE MTT-S Digest, 0-7803-5135-5, 1999, pp. 1245-1248 (Discussed in p. 2 of the spec.), 1999.
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