| 摘要 |
FIELD: can be used in manufacture of indoor television antennas. SUBSTANCE: the method consists in inducing of n elementary electric signals at effective lengths of each of n dipoles (1<n<25), with relation between minimum (Emin) and maximum (Emax) values within 1<Emin/Emax<1; their summation mainly in the process of resonance with the gain factor within 0 to 5 dB in the service frequency band. The maximum linear dimension of the antenna (Lmax) is determined by selection of the minimum frequency of the band (fmin Lmax=d/fmin), where d is selected within 3×10≅ d(mm/c)≅ 3×10].. Selection of the values of capacitive coupling between the output ends of dipoles decreases the values of the reactive component of the antenna input impedance (JmZin) within 1≅ [(ImZin+Rc)]/Rc≅ 1,25, where Rc - cable resistance at a standing-wave ratio (SWR) within 1<SWR>2.5. The antenna has sheets of array in the form of n dipoles (1<n<25) from a combination of current- conducting mainly parallel to one another rods with a section of an arbitrary shape with total length l1, selected with respect to the maximum dimension of perimeter l2 of its cross-section within 1,6≅ l1/l2≅ 4×10. Total area S1 of the antenna receiving sheet S2 within 0.1<S1/S2<1. Electrical connection of antenna dipoles to the form of spring contact plates, whose area S3 is selected with respect to area S4 of their contacting sections within 0.01<S4/S3<1. Minimum length of the rods (dipoles) l3 with respect to their maximum length l4 is selected within 0.05<l3/l4<1, maximum distance l5 between the dipoles is interrelated with l4 by relation 1<(l5+l4)l4<6. The active component of input impedance Rin of the antenna sheet is selected with respect to cable resistance Rc within 0≅ [Rc-α(Rc)xRin]/[Rc+α(Rc)xRin]≅ 0,43, , where α(Rin)-experimental coefficient within 0,75≅α(Rc)≅ 1,35, specific features and errors of manufacture in working conditions. EFFECT: expanded service frequency band due to perfection of design features of the antenna. 2 cl, 1 dwg, 1 tbl |
