Abstract :
The AM antenna tuning method presented takes into account and absorbs stray inductances and capacitances, and mutual coupling between components with very high initial adjustment accuracy. Besides an antenna monitor and a field strength meter, the equipment used for tuning consists of a high-precision reflectometer, a spring-loaded and side-handled split toroidal clamp-on ammeter, and a Hewlett-Packard HP-15 programmable calculator programmed with routines used to analyze measured raw data. These programs are written to determine power distribution, transmission line matching conditions and phase shifts. The techniques described inherently minimize the number of different ground points one must refer to. In addition, the few grounds needed with these techniques are much closer to true ground
Keywords :
broadcast antennas; directive antennas; tuning; AM antenna; Hewlett-Packard HP-15 programmable calculator; antenna monitor; directional antenna tuning; field strength meter; high-precision reflectometer; mutual coupling; phase shifts; power distribution; split toroidal clamp-on ammeter; stray capacitance; stray inductances; transmission line matching conditions; Ammeters; Antenna accessories; Antenna measurements; Capacitance; Data analysis; Directional antennas; Mutual coupling; Power distribution; Reflector antennas; Transmission line measurements;
