TWO-BAND ANTENNA Russian patent published in 1999 - IPC

FIELD: antenna equipment. SUBSTANCE: device has two symmetrical wire arms. Goal of invention is achieved by additional wire piece which are introduced into each wire arm in symmetry about its longitudinal axis. Length of wire arms from outer end to connection point of additional wire pieces is equal to 0,5•λ_av; length of wire arm piece from symmetry axis of antenna to connection point of additional pieces is 0,25λ_av,, length of each additional piece is 0,5λ_av,, where λ_av is average wavelength of high-frequency band. Second claim of invention discloses device design in which each wire arm is designed as two conductors diverging with respect to antenna center. Additional pieces of conductors are connected to each conductor of wire arms in parallel to longitudinal axis of antenna. EFFECT: increased efficiency.