Each antenna is mounted on a separate stand and its properties are studied individually in the laboratory. Four VHF field strength meters are also supplied. They can also be located at various places for determining the radiation pattern. A VHF generator with a fixed frequency of 170 MHz is supplied for exciting these antennas. Using lower frequencies, the wave lengths are too long to be accommodated within the laboratory dimensions.
Higher frequencies have shorter wavelengths.
It is more difficult to observe and analyse. Thus, the choice of selecting 170 MHz is a compromise between convenience of length and observation for analysis. Six number of VHF impedance matching transformer. A VHF Power amplifiers. A VHF Voltage amplifier.