Figure 5 Small UA6AGW Antenna
Data for the Antenna
Dimension of the antenna were
too big for the 2- meter band. However the antenna with help of
C1 and C2 may be tuned across FM Band 88- 108- MHz.
Test of the antenna was made at the band only at receiving mode.
Antenna had one lobe diagram of
directivity. The lobe was 30... 40 degree. Suppression from back
and sides was at least minus 20- dB. Moving the coupling loop
across the loop in one direction was going to increasing of the
level receiving stations.
Moving the coupling loop across
the loop in the opposition direction was going to decreasing of
the level receiving stations and almost stopping of the receiving.
Changing the coaxial cable connection to the coupling loop (visa
versa) changed the direction. Looks like the one direction diagram
directivity of the antenna was obtained due to the coupling loop
placed athwart to radiation loop. Experimenters with
the antenna was loaded to Youtube at:
6 Coupling Loop
7 Fixture for Moving Coupling Loop
R3P9N, talking about his experimenters with UA6AGW Antenna