Patent ID: 8570227

Claim:
A transmit antenna system, comprising: a pulse generator outputting a series of voltage pulses with a pulse frequency associated therewith; a transistor having a gate coupled to said pulse generator for receiving said voltage pulses, said transistor further having a drain and a source; a coupled inductor having a first inductor and a second inductor in proximity to said first inductor, said first inductor having a first contact coupled to said drain and having a second contact, said second inductor having a first contact and a second contact; a tuning capacitor coupled to each of said first contact and said second contact associated with said second inductor to thereby define a tunable inductor circuit; an antenna coupled to said tunable inductor circuit; a choke inductor having a first contact coupled to said second contact associated with said first inductor, said choke inductor further having a second contact; a direct current voltage source having a positive terminal coupled to said second contact associated with said choke inductor, said voltage source further having a ground terminal coupled to said source of said transistor; wherein, during each of said voltage pulses, a resonant circuit is defined wherein parameters of said resonant circuit include resistance and capacitance of said antenna, capacitance of said tuning capacitor, inductance of said second inductor, a mutually coupled inductance of said first inductor and said second inductor, and capacitance of said transistor; and wherein said resonant circuit is configured such that a resonant frequency thereof is equal to said pulse frequency of said pulse generator.