(19)
(11) EP 1 837 950 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.10.2007 Bulletin 2007/42

(43) Date of publication A2:
26.09.2007 Bulletin 2007/39

(21) Application number: 07107431.4

(22) Date of filing: 13.09.2001
(51) International Patent Classification (IPC): 
H01Q 1/36(2006.01)
H01Q 1/48(2006.01)
H01Q 9/04(2006.01)
 H01Q 1/38(2006.01)
H01Q 5/00(2006.01)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

(62) Application number of the earlier application in accordance with Art. 76 EPC:
01983481.1 / 1425820

(71) Applicant: Fractus, S.A.
08190 San Cugat Del Valles (Barcelona) (ES)

(72) Inventors:
  • Quintero Illera, Ramiro
    08921 Santa Coloma de Gramenet (Barcelona) (ES)
  • Puente Baliarda, Carles
    08190 Santa Cugat del Valles (Barcelona) (ES)

(74) Representative: Carpintero Lopez, Francisco et al
Herrero & Asociados, S.L. Alcalá 35
28014 Madrid
28014 Madrid (ES)

   


(54) Multilevel and space-filling round-planes for miniature and multiband antennas


(57) An antenna system includes one or more conductive elements acting as radiating elements, and a multilevel or space-filling ground-plane, wherein said ground-plane has a particular geometry which affects the operating characteristics of the antenna. The return loss, bandwidth, gain, radiation efficiency, and frequency performance can be controlled through multilevel and space-filling ground-plane design. Also, said ground-plane can be reduced compared to those of antennas with solid ground-planes.







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