ANTENTOP- 01- 2015 # 019

R3PIN Experimenters with UA6AGW Antenna

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: http://www.youtube.com/watch?v=gPBTSM-uFKI

Figure 6 Coupling Loop

Figure 7 Fixture for Moving Coupling Loop

Sergey, R3P9N, talking about his experimenters with UA6AGW Antenna

www.antentop.org

Page- 52