Dual-band octafilar helix antenna

Details Dual-band octafilar helix antenna Dual-band octafilar helix antenna

1995-09-22

1998-10-27

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

Spiral or helical type

343853, H01Q 136

Patent

active

058283480

ABSTRACT:
A dual-band octafilar helix antenna operational at two frequencies, while maintaining a relatively small package size. The dual-band octafilar antenna is manufactured by disposing radiators and a feed network onto a flexible substrate and forming the substrate into a cylindrical shape to obtain the helical configuration. The dual-band octafilar helix antenna includes four active radiators which are matched to a first frequency and disposed on a radiator portion of the flexible substrate. Four additional radiators, which may be either passive or active radiators, are matched to a second frequency, are also disposed on the radiator portion of the substrate and interleaved with the active radiators. At least one feed network is provided on a feed portion of the substrate that provides 0.degree., 90.degree., 180.degree., and 270.degree. signals to active radiators. The sets of radiators and associated feed networks may be formed on opposing sides of a single substrate or on spaced apart layers in a multi-layered support substrate design.

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