Multifrequency microstrip antenna and a device including said an

Details Multifrequency microstrip antenna and a device including said an Multifrequency microstrip antenna and a device including said an

1998-12-11

2000-10-17

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

H01Q 138

Patent

active

061338796

ABSTRACT:
A multifrequency microstrip antenna in accordance with the present invention includes two zones connected to a short-circuit consisting of two conductive strips. These zones are sufficiently decoupled from each other to enable two resonances to be established in two respective different areas formed by the zones. The resonances are at least approximately of the quarter-wave type and each has an electric field node fixed by the short-circuit. The same coupling device is used to excite the two resonances. The invention applies in particular to portable telephones and to their base stations.

REFERENCES:
patent: 4320401 (1982-03-01), Schianvone
T. D. Ormiston et al, "Microstrip Short-Circuit Patch Design Equations", Microwave and Optical Technology Letters, vol. 16, No. 1, Sep. 1997, pp. 12-14.
S. Mellah et al, "Novel Microstrip Circular Patch Antennas", 24.sup.th European Microwave Conference Proceedings, Cannes, Sep. 5-8, 1994, vol. 2, No. Conf. 24, Sep. 5, 1994, pp. 1750-1755, European Microwave Management Committee.

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