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Title:
QUADRIFILAR HELICAL ANTENNA FOR COMMUNICATING IN A PLURALITY OF DIFFERENT FREQUENCY BANDS
Document Type and Number:
WIPO Patent Application WO/2018/167353
Kind Code:
A8
Abstract:
A quadrifilar helical antenna (100) for communicating in a plurality of different frequency bands comprises at least two ports (102, 104). Each port (102, 104) is operationally coupled with a port-specific set (106, 108) of helical filars, the port- specific set (106, 108) of filars including at least one band- specific filar (110A, 110B, 112A1, 112A2, 112B1, 112B2) for each of said plurality of the different frequency bands. At least two of the band-specific filars (112A, 110B), the band-specific filars (112A, 110B) belonging to different band-specific filars and different port-specific sets (106, 108) adjacent to each other, have mutual coupling between the ports (102, 104), the mutual coupling resulting in a destructive phasing of the frequency bands between the at least two of the band-specific filars (112A, 110B).

Inventors:
HAARAKANGAS, Tuomo (Tutkijantie 8, Oulu, 90590, FI)
Application Number:
FI2017/050178
Publication Date:
November 29, 2018
Filing Date:
March 17, 2017
Export Citation:
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Assignee:
BITTIUM WIRELESS OY (Tutkijantie 8, Oulu, 90590, FI)
International Classes:
H01Q1/36; H01Q5/10; H01Q5/35
Attorney, Agent or Firm:
KOLSTER OY AB (P.O.Box 204, Helsinki, Helsinki, 00181, FI)
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