Delta Antenna for 80-. 40-, 20- and 15- meter Bands

The publication is devoted to the memory of UR0GT.

Credit Line: Forum from:

www.cqham.ru

By: Nikolay Kudryavchenko, UR0GT

The Delta Antenna has perimeter 86- meter. Antenna has resonances at four amateur bands. There are 80, 40, 20 and 15 meter. However, input impedance at the bands not allows use a 50- Ohm coaxial cable to feed the antenna with low SWR at all the bands. Best solution is to use a 100- Ohm coaxial cable. Then simple ATU to match the antenna system with transceiver.

By the way, common use TV 75- Ohm coaxial cable may be used to feed the antenna. Two wires open line allows use the antenna at all amateur HF bands. At this case an ATU should be used to match the antenna system,

Figure 1 shows three version of the antenna. Each of the versions has some advantages and disadvantages.

Figure 1 Design of the Delta Antenna for 80-, 40-, 20- and 15- meter Bands

www.antentop.org

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