Dual layer resonant quadrifilar helix antenna

Details Dual layer resonant quadrifilar helix antenna Dual layer resonant quadrifilar helix antenna

H - Electricity

01

Q

351/45

H01Q 9/04 (2006.01) H01Q 9/28 (2006.01) H01Q 11/08 (2006.01)

Patent

CA 2029290

ABSTRACT OF THE DISCLOSURE Disclosed is a new antenna structure having a quasi-hemispherical radiation pattern and capable of having a relatively wide, passband, so that it is possible to define two neighboring transmission sub-bands therein or, again, a single wide transmission band. The antenna is of the type comprising a quadrifilar helix (11) formed by two bifilar helices (111, 112, 113, 114) positioned orthogonally and excited in phase quadrature, and including at least one second quadrifilar helixthat is coaxial and electromagnetically coupled with said first quadrifilar helix (11). Preferred application to L band communications among geostationary satellites or transiting satellites with moving bodies fitted out with such antennas. Fig. 1

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