DOUBLE-CHANNEL DUEL-BAND QUADRIFILAR ANTENNA Russian patent published in 2010 - IPC H01Q9/04 

FIELD: radio engineering.

SUBSTANCE: spiral radiators (SR) are conical, and each of them is made in the form of piece (3) of transmission line, which contains the main and auxiliary conductors (C), as well as radiating (4) C. Feed circuit is made in the form of two quadrature four-channel power dividers with one input (15) and four outputs (13) and (14). Outputs (13) and (14) of feed circuit contain eight central (1) C and one common (2) C. The main C of pieces of (3) transmission lines are connected on one side to central (1) C of outputs of feed circuit, and on the other side to radiating (4) C; at that, central (1) C of pieces (3) of transmission lines of various groups (5) and (6) SR are connected to central (1) C of outputs (13) and (14) of various quadrature power dividers. Auxiliary C of pieces (3) of transmission lines are connected to common (2) C of feed circuit. Radiating (1) conductors of SR are offset relative to each other through 180 degrees and connected to each other with connection straps (9). Concentrated resonant circuits are connected to radiating (4) C. Resonant frequencies (RF) of circuits connected to radiating (4) conductors of SR of one group have similar RF differing from RF of the circuits connected to radiating (4) conductors of SR of the other group.

EFFECT: enlarging working frequency band, separation of signals of two frequency bands as to various inputs, and reducing aerodynamic resistance.

6 cl, 8 dwg