1-Element-50Ohm-"Yagi" Gain 2,65dBd, F/B 5,5dB Dipole mounted about 250mm in front of the support (check distance for SWR=1,0) Match with the DK7ZB-50-Ohm-choke |
If the dipole is mounted vertically 250mm in front of a metal support as shown in the picture , the gain is 2,65dBd at 5,5dB F/B. First correct the length of the radiator for best SWR, then change the distance to the support, if SWR not <1,2
144MHz | 145MHz | 146MHz | |
Impedance | 49- j5 Ohm | 50 +/- j0 Ohm | 51,5 + j5 Ohm |
SWR | 1,1 | 1,0 | 1,1 |
Length of the dipole (tip to tip):
Diameter |
4mm |
6mm |
8mm |
10mm |
Length |
958mm |
950mm |
943mm |
939mm |
Patterns for vertical mounting: