ANTENA ZA DEKAMETARSKE TALASE

ANTENA ZA DEKAMETARSKE TALASE, koja ima najmanje jedan zastor postavljen vertikalno sa dipolima (d2, d3, d5-d16) rasporedjenim u grupama na različitim nivoima. Pravougaeni oblik zastora sa dipolima kod poznatih antena je napušten u korist jednog oblika koji je više sužen u gornjem delu zastora, zahvaljujući tome što je jedan broj dipola smanjen u gornjem delu (d2-d3) u odnosu na broj u grupama donjeg dela (d5-d8; d9-d12; d13-d16); reflektor (Rb) pridružen zastoru ima odgovarajuću površinu manje širine u gornjem delu u odnosu na donji deo. Performanse su samo malo izmenjene, a konstrukcija je znatno lakša. Primenjuje se naročito kod obrtnih antena. The invention relates to antennas for decimetric waves including at least one vertical array of dipoles (d2, d3, d5-d16) distributed in groups on various levels. The substantially rectangular form of the dipole array of known antennas is abandoned in favour of a form which is narrower in the top part of the array, by virtue of a reduced number of dipoles in the groups of the top part (d2-d3) by comparison with that in the groups of the bottom part (d5-d8; d9-d12; d13-d16); the reflector (Rb) associated with the array has correspondingly a surface of smaller width in its top part than in its bottom part. The performance thereof is only slightly affected and the structure is considerably lighter in weight. Application, in particular, to rotary antennas.