Patent ID: 7916000

Claim:
An automatic antenna tuning system comprising: (a) a pulse width modulator; (b) a microprocessor for controlling the generation of frequency of a source signal from said modulator; (c) an inductor; (d) a plurality of relay contacts and capacitors for receiving said source signal from said amplifiers and transmitting it to said inductor, said inductor and capacitor generating a resonating signal; (e) a gate communicating with said capacitors through one or more relay contacts for transmitting said resonating signal as a carrier signal; (f) means for gating said carrier signal with said source signal to produce a compared signal for gating with a crystal to produce a string of pulses, said microprocessor having a (i) counter for determining the count of said string of pulses and (ii) means for varying capacitance to increase or decrease the count of said string of pulses until the count is substantially 120.