Prezinta un cistig de cimp apreciabil, de 10—11 dB, o diagrama de radiatie ingusta in plan orizontal. Banda de trecere a antenei este suficient de mare ca sa permita lucrul…
Prezentata in fig. 240 a, da un cistig de cimp de. 6—7 GB si are o rezistenta de intrare de 240 Ω. Dimensiunile indicate corespund benzii de 144 MHz. Antena…
In domeniul undelor ultrascurte pentru traficul de radioamatori intereseaza benzile de 144—146 MHz si 430-440 MHz. In acest capitol se prezinta diferite tipuri de antene pentru aceste benzi de radioamatori,…
Retine atentia radioamatorilor ca una din antenele directionale de mare eficacitate, intrunind toate avantajele antenei quad, fara .a avea fragilitatea si sistemul complicat de sustinere ale acesteia. Conceputa si realizata…
Practica, a dovedit superioritatea antenei quad fata de antenele directionale cu elemente orizontale, ca urmare a unui unghi de radiatie verticala mai mic decit in cazul antenelor orizontale. Acesta are…
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