ANTENTOP- 01- 2018 # 022

UA6AGW Antenna with Vertical Radiators for the 20- meter Band

Figure 2 Capacitors Inside of Waterproof Electrical Box

The antenna is fed through a Coupling Loop in diameter of 430- mm. Figure 5 shows the coupling loop at the main loop. References give your information how to make the coupling loop. It is possible use just several pieces of wire instead of the lower vertical radiator.

Tuning of the Antenna:

The antenna is tuned to the resonance frequency with help of capacitors C1 and C2. To the minimum SWR in coaxial cable the antenna tuned by changing distance between coupling and main loop and may be by changing the form of the coupling loop. Figure 6 shows SWR and Z of the UA6AGW Antenna with Vertical Radiators installed at distance of 0.5 meter between the ground and the end of the lower vertical radiator.

DD of the UA6AGW Antenna with Vertical Radiators:

As you can see from Figure 6 the antenna has SWR no more the 2.0:1.0 at all 20- meter Band. Practice shows that the antenna has almost circle diagram directivity in horizontal plane with low radiation angle in vertical plane. Antenna may be placed at small height above the ground.

Figure 3 Main Loop with Capacitors' Box

Figure 4 Installed UA6AGW Antenna with Vertical Radiators in tested position

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