Communications: radio wave antennas – Antennas – With polarization filter or converter
Patent
1975-11-17
1977-12-13
Lieberman, Eli
Communications: radio wave antennas
Antennas
With polarization filter or converter
3437925, 343837, H01Q 1110, H01Q 1524
Patent
active
040632490
ABSTRACT:
A broadband antenna system of small dimensions and composed of at least one antenna having an associated design operating frequency, and a plurality of reflectors operatively associated with the antenna and disposed at respectively different distances therefrom, each reflector being spaced from the antenna and having a reflection characteristic to be optimally matched with the antenna for operation at a respective partial frequency band, each reflector being associated with a different partial band such that the total operating frequency range of the system is divided into a plurality of partial bands equal in number to the number of reflectors and covering the design operating frequency range and a further frequency range below the lower limit of the design range, whereby the antenna characteristics are improved, and in particular the operative bandwidth of the system is increased in the low frequency direction.
REFERENCES:
patent: 2680810 (1954-06-01), Korman
patent: 2991473 (1961-07-01), Van Staaden
patent: 3745585 (1973-07-01), Barbano
Bergander Armin
Kurz Georg
LICENTIA Patent-Verwaltungs-G.m.b.H.
Lieberman Eli
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