LOG-PERIODIC ANTENNA Russian patent published in 2010 - IPC H01Q11/10 

FIELD: radio engineering.

SUBSTANCE: antenna includes flat log-periodic construction which is fixed on support dielectric housing, matching balance-to-unbalance transformer and metal reflector. Between log-periodic structure and metal reflector of the antenna base there arranged is absorbing device made in the form of a set of radar absorbent discs of decreasing diametre, which are separated one from the other with thin metal gaskets, located concentrically between metal reflector and log-periodic structure at various distance from it.

EFFECT: obtaining small amplification factor, which allows using antenna for measurement of amplification coefficient of near-omnidirectional antennae.

1 dwg