ANTENTOP- 01- 2012, # 016

Vertical Antenna for 80-, 40-, 20-, 15- and 10- meter Bands

Yuri Medinets, UB5UG, Kiev

Credit Line: Radio # 9, 1960, p. 44

The antenna is designed to work at 80-, 40-, 20-, 15- and 10- meter Bands without any commutation in the ATU (Antenna Tuning Unit). It is reached with the help of ATU made on the base of an open stub that is connected to the vertical radiator and counterpoises. The stub made from a coaxial cable and has electrical length 0.5- lambda at the 80- meter Band.

Figure 1 Current distribution along the antenna and the Stub

Radio # 9, 1960

Front Cover

Is it possible to find terminals at the stub where matching on the amateurs Bands 40-, 20-, 15- and 10-meter is rather possible. Current distribution along the antenna and the Stub is shown on the Figure 1.

Design of the antenna is shown on the Figure 2. Length of the Vertical radiator and length of the stub is optimized for good diagram directivity for all working bands.

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