UNBALANCED ANTENNA Russian patent published in 2001 - IPC

FIELD: antennas. SUBSTANCE: the unbalanced antenna has a vertical vibrator connected to the inner conductor of the coaxial cable, N straight-link conductors of the counterpoise connected at an angle of 140 to 155 deg. to the outer conductor of the coaxial cable symmetrically arranged around it, and N straight-link conductors arranged between them and connected to the vertical vibrator. The length of the vertical vibrator makes up 0,125λ. The straight-link conductors of the vertical vibrator are located in the area of its excitation, in the plane orthogonal to it and directly connected to the inner conductor of the coaxial cable. The quantity of the straight-link conductors of the vibrator and counterpoise is even N ≥ 16.. The total length of each of N/2 of the diametrically located pair of straight-line conductors of the vertical vibrator dn is connected with the total length of the respective pair of straight-link conductors of the counterpoise ln by relation dn=0.5 ln and decreases from the first pair with maximum length l1 equal to 0,168...0,17λ, by the law of geometric progression with denominator τ=0.8 to 0.85, i.e. ln+1=lnτ, or dn+1=dn τ, where n=1,2,3... N/2 ordinal number of diametrically arranged straight-link conductors of the vertical vibrator and counterpoise. The matching device is cut in the break between the base of the vertical vibrator and the point of connection to it of its conductors. The matching device comprises two inductance coils L1 and L2, three capacitors C1, C2 and C3, two resistors R1 and R2. EFFECT: expanded band of operating frequencies. 1 dwg