ANTENTOP- 01- 2014 # 018

Simple Broadband Antenna for the 40- meter Band

Igor Grigorov, va3znw

The Simple Broadband Antenna was designed on base of my local environment and taking into account the ease/cheap to do. Figure 1 shows the antenna. Three points there are need to install the antenna. There is one point at right fence second point at left fence and third point at a window on the second floor of my house. For antenna wire it was used electrical copper wire in diameter 18- AWG in strong black insulation (33-cent/m, Home Depot is supplier).

Antenna is simple to do. A 10- meters length of the wire is fastened by the ends to both fences. Leave 50- 80 cm free wire length at both sides at initial installation.

Figure 2 shows the wires. The length, from one side, should be used for tuning antenna in to the resonance, at second side should connect with feed line. Center of the wire is heightened and attached to the window frame.

Ground of the antenna included a wire going on to the fence down to the earth. Near the earth the wire was connected to an earth wire. The earth wire was made of three wires. One wire was galvanized bare wire in 18 AWG. Two wires (similar to the antenna wire) were attached to the stranded wire by ties. The triple wire had length near 3.5 meter.

Figure 1 Simple Broadband Antenna for the 40- meter Band

www.antentop.org

Page- 30