Multiband planar antenna

Details Multiband planar antenna Multiband planar antenna

2006-06-20

2006-06-20

Le, Hoanganh (Department: 2821)

Communications: radio wave antennas

Antennas

Slot type

C343S769000

Reexamination Certificate

active

07064724

ABSTRACT:
The present invention relates to a multiband planar antenna comprising, on a substrate having a ground plane, at least a first slot dimensioned for operation at a first frequency and a second slot dimensioned for operation at a second frequency, the two slots having a closed shape and being excited by a common supply line. Furthermore, the slots are coupled to the supply line such that the coupling with the first slot is implemented in an electrical plane of the supply line of a first type and the coupling with the second slot is implemented in an electrical plane of the supply line of a second type, the supply line having, at its free end, a control element comprising two states allowing the type of electrical plane at the coupling points of the line with the first and second slots to be modified, the slots being positioned with respect to the supply line such that only one of them radiates for a given state of the control element.This antenna can operate in at least two frequency bands such as that around 2.4 GHz and that around 5 GHz.

REFERENCES:
patent: 6891510 (2005-05-01), Le Bolzer et al.
patent: 6917342 (2005-07-01), Thudor et al.
patent: 2 821 503 (2002-08-01), None
patent: WO 03/058758 (2003-07-01), None
Search Report.
Kolsrud A T et al., “Electronically Switchable Slot Antenna Fed By Microstrip Line.”, Antennas and Propagation Society International Symposium, 1998, New York, NY USA IEEE, US, p. (S) 1180-1183 XP010292351 Isbn: 0-7803-4478-2.
Hirsoe K et al., Dual-Loop Slot Antenna With Simple Feed), Electronics Letters, IEE Stevenage, GB, vol. 25 No. 18, 1989 pp. 1218-1219 XP000081699 ISSN: 0013-5194.

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