SUPERBROAD-BAND TRANSCEIVING ANTENNA Russian patent published in 2003 - IPC

FIELD: antenna engineering, radars, communications, and other antenna systems disposed on flying vehicles. SUBSTANCE: proposed antenna whose passband is extended to three octaves functions to generate isotropic directivity pattern during vertical polarization in azimuthal plane and fan- type one in elevation plane and has three electromagnetic energy radiators made in the form of equal-section monopoles whose electrical length is 3λl/4, 3λh/4, 3λin/4, respectively, where λl, λh, λin is wavelength of low, high, and intermediate radiation frequency, respectively, the longest and the shortest monopoles being interconnected by means of shorting device; distance between matching and shorting devices governs matching bandwidth of antenna. Axis-to-axis distances between monopole having electrical length 3λh/4 and monopoles whose electrical lengths are 3λl/4, 3λin/4 are chosen to equal sectional perimeter of one monopole, sectional perimeter of shorting device being also equal to that of monopole. Three monopoles may be disposed along straight line so that central one has electrical length 3λh/4, and lateral ones, 3λl/4 and 3λin/4., respectively. Moreover three monopoles may be disposed at angles of isosceles triangle whose vertex angle is larger than or equal to π/3,, monopole of electrical length 3λh/4 being disposed in isosceles triangle vortex and radiators of electrical length 3λl/4, 3λin/4, in corners at triangle base. EFFECT: enlarged passband and reduced size of antenna. 7 cl, 9 dwg