Communications: radio wave antennas – Antennas – Plural separate diverse type
Patent
1995-01-25
1996-11-05
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Plural separate diverse type
343895, H01Q 136, H01Q 2128
Patent
active
055722270
ABSTRACT:
A multiband antenna system for operating at L-band, S-band and UHF-band. The antenna includes L-band antenna elements and S-band antenna elements provided in the form of quadrifilar helices spaced from each other on the surface of a hollow cylindrical insulator. UHF band antenna elements are provided in the form of a cage dipole on the surface of the hollow cylindrical insulator. The L-band antenna input is connected to a first connector through an L-band feed network card. The S-band antenna input is connected to a second connector through an S-band feed network card and the UHF-band antenna input is connected to a third connector through a split sheath balun provided along the axis of the hollow cylindrical insulator.
REFERENCES:
patent: 4008479 (1977-02-01), Smith
patent: 4011567 (1977-03-01), Ben-Dov
patent: 4302760 (1981-11-01), Laufer
patent: 5138331 (1992-08-01), Josypenko
patent: 5255005 (1993-10-01), Terret et al.
patent: 5343173 (1994-08-01), Balodis et al.
Patent Abstracts of Japan, JP4134906, vol. 16, No. 403, (E-1254), 26 Aug. 1992.
Aswathnarayan Subramaniam
Kumar Manickam
Lakshmeesha Vodralli K.
Mahadevan Vaidyanathan
Mallikarjunaiah Thammaiahappa
Indian Space Research Organisation
Wimer Michael C.
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