L'antenna di tipo Yagi e' la piu diffusa, in assoluto,è formata da due o piu' dipoli cilindrici accoppiati ed eccitati in fase.La configurazione piu' popolare e' formata da un solo elemento, con l'aggiunta di un numero di altri non direttamente eccitati induttivi, detti anche parassiti
Antenna Yagi Links →
63
The Yagi-Uda antenna generalities
If a conductor of length equal to half a wave is placed near a dipole, the electromagnetic field radiated by the latter induces an HF current of the same frequency but of much less amplitude in the conductor |
The clemens match
The Clemens match is easy to make and reliable, and is preferable to a single Gamma match as it is balanced |
Two elements YAGI for field day operation
The antenna should cover 20m and possibly 40m band. The whole antenna kit should be light enough for hand carrying to most remote area |
The Clemens Match,gamma Match
The Clemens match is easy to make and reliable, and is preferable to a single Gamma match as it is balanced |
DIY OVF 3 bander 17m-15m-20mTwo driven elements, opposite voltage feed on all bands open sleeve feed on 15 and 17m to two elements band switching partly by relays, 15/17m Band combination 20m 17m and 15m Integral impedance matching unit
|
Calculator yagi |
Ferrite Shop Ferrite-shop on-line shop, cable clamps,toroids, cable cores, technic,ferrite material choice
