Patent ID: 8797107

Claim:
A voltage controlled oscillator, comprising: multiple split ring resonators (SRRs) configured to have meta-material characteristics fabricated on a board, the SRRs operating at different frequencies; an energy compensation circuit configured to cause resonant oscillation of the SRRs, the energy compensation circuit being fabricated in the form of an integrated circuit; and multiple switches configured to perform a switching operation to allow any one of the SRRs to make resonant oscillation by the energy compensation integrated circuit wherein the multiple switches comprise: a first switch configured to perform a switching operation between the energy compensation integrated circuit and the first SRR, a second switch configured to perform a switching operation between the energy compensation integrated circuit and the second SRR, and an inverter connected to the first switch and the second switch such that the inverter is configured to provide one of low and high signals to the first switch and the other of the low and high signals to the second switch so that the first switch and the second switch are selectively operated.