Antenna arrangement
AssigneeSaab AB
InventorsBengt Svensson, Anders Höök, Ville Viikari, Juha Ala-Laurinaho, Mikko Leino
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Abstract
The present disclosure relates to an antenna arrangement including a first antenna configured to operate within a first frequency band and a second antenna configured to operate within a second frequency band. The first frequency band is higher than the second frequency band. Further, the second antenna is at least partly arranged within an illumination-field of the first antenna. Furthermore, the second antenna includes a dipole structure segmented into a plurality of electrically conductive sections, wherein each electrically conductive section is coupled to an adjacent electrically conductive section by a reactive load section.
Claims15
An antenna arrangement comprising:
- a first antenna configured to operate within a first frequency band,
- a second antenna configured to operate within a second frequency band, wherein the first frequency band is higher than the second frequency band,
- wherein the second antenna is arranged in front of the first antenna such that the second antenna is within an illumination field of the first antenna and is illuminated with a plane RF wave from the first antenna,
- wherein the second antenna comprises a dipole structure segmented into a plurality of electrically conductive sections, wherein each electrically conductive section is coupled to an adjacent electrically conductive section by a reactive load section,
- wherein each electrically conductive section has a length (L1) being equal to or less than λ/3, and wherein a spacing (L2) between adjacent electrically conductive sections is at least λ/30, wherein λ is the wavelength at a highest frequency of the first frequency band;
- wherein each reactive load section is an inductive load section comprising a meandering line;
- wherein the meandering line comprises a first, a second, a third, and a fourth turn-portion, wherein two turn portions define an oscillation of the meandering line.
A fixed installation comprising an antenna arrangement, wherein the antenna arrangement comprises:
- a first antenna configured to operate within a first frequency band,
- a second antenna configured to operate within a second frequency band, wherein the first frequency band is higher than the second frequency band,
- wherein the second antenna is arranged in front of the first antenna such that the second antenna is within an illumination field of the first antenna and is illuminated with a plane RF wave from the first antenna,
- wherein the second antenna comprises a dipole structure segmented into a plurality of electrically conductive sections, wherein each electrically conductive section is coupled to an adjacent electrically conductive section by a reactive load section,
- wherein each electrically conductive section has a length (L1) being equal to or less than λ/3, and wherein a spacing (L2) between adjacent electrically conductive sections is at least λ/30, wherein λ is the wavelength at a highest frequency of the first frequency band;
- wherein each reactive load section is an inductive load section comprising a meandering line;
- wherein the meandering line comprises a first, a second, a third, and a fourth turn-portion, wherein two turn portions define an oscillation of the meandering line.
A vehicle comprising an antenna arrangement, the antenna arrangement comprising:
- a first antenna configured to operate within a first frequency band,
- a second antenna configured to operate within a second frequency band, wherein the first frequency band is higher than the second frequency band,
- wherein the second antenna is arranged in front of the first antenna such that the second antenna is within an illumination field of the first antenna and is illuminated with a plane RF wave from the first antenna,
- wherein the second antenna comprises a dipole structure segmented into a plurality of electrically conductive sections, wherein each electrically conductive section is coupled to an adjacent electrically conductive section by a reactive load section,
- wherein each electrically conductive section has a length (L1) being equal to or less than λ/3, and wherein a spacing (L2) between adjacent electrically conductive sections is at least λ/30, wherein λ is the wavelength at a highest frequency of the first frequency band;
- wherein each reactive load section is an inductive load section comprising a meandering line;
- wherein the meandering line comprises at least a first a second, a third and a fourth turn-portion, wherein two turn portions define an oscillation of the meandering line.
Dependencies are inferred from the claim text.