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1. WO2001080366 - SYSTEME D'ANTENNE DOUBLE POUR BANDE MONOFREQUENCE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A dual-antenna system comprising:
a satellite antenna for receiving signals from a satellite transmitter; and
a terrestrial antenna for receiving signals from a terrestrial transmitter, said first antenna and said second antenna being substantially concentric.
2. A dual-antenna system as defined in claim 1 wherein said satellite antenna is a helix antenna.
3. A dual-antenna system as defined in claim 2 wherein said terrestrial antenna is a monopole antenna.
4. A dual-antenna system as defined in claim 2 wherein said terrestrial antenna is a sleeve dipole antenna.
5. A dual-antenna system as defined in claim 1 wherein said satellite antenna comprises a cross dipole, and said terrestrial antenna comprises a plurality of monopoles arranged in a substantially symmetric configuration about said cross dipole.
6. A dual-antenna system comprising:
a first antenna for receiving circularly polarized signals, said first antenna having a center; and
a second antenna for receiving linearly polarized signals, said second antenna having a center, said first antenna and said second antenna being substantially concentric.
7. A dual-antenna system as defined in claim 6 wherein said first antenna comprises a cross dipole, and said second antenna comprises a plurality of monopoles arranged in a substantially symmetric configuration about said cross dipole.
8. A dual-antenna system as defined in claim 6 wherein said first antenna comprises a helix antenna.

9. A dual-antenna system as defined in claim 8 wherein said second antenna comprises a monopole antenna inside said helix antenna.
10. - A dual-antenna system as defined in claim 8 wherein said second antenna comprises a sleeve dipole antenna inside said helix antenna.
11. A dual-antenna system comprising:
a cross dipole antenna; and
a plurality of monopole antennas arranged in a substantially symmetric pattern about said cross dipole antenna.
12. A dual-antenna system as defined in claim 11 comprising four of said monopole antennas with one of said monopole antennas located in one of the quadrants of said cross dipole antenna.
13. A dual-antenna system as defined in claim 12 wherein said monopole antennas are equally spaced from one another.
14. A dual-antenna system comprising :
a helix antenna; and
one or more linear antennas arranged symmetrically with respect to said helix antenna.
15. A dual-antenna system as defined in claim 14 wherein said linear antenna is a monopole antenna inside said helix antenna.
16. A dual-antenna system as defined in claim 14 wherein said linear antenna is a sleeve dipole antenna inside said helix antenna.
17. A dual-antenna system as defined in claim 14 comprising a plurality of monopole antennas.
18. A dual-antenna system as defined in claim 17 comprising four of said monopole antennas.
19. A dual-antenna system comprising: a helix antenna; and
a mono-pole antenna inside and concentric with said helix antenna. 20. A dual-antenna system comprising:
a helix antenna; and
a sleeve di-pole antenna inside and concentric with said helix antenna.