Patent ID: 9166562
Filing Date: 2015-10-20
Classification: H02J,H03H,H04B,Y02D,Y10T

Abstract:
1. A transmitter apparatus, comprising: a driver circuit characterized by an efficiency and a power output level, the driver circuit electrically connected to a transmit circuit having an impedance, the impedance of the transmit circuit within a complex impedance range including resistive and reactive variations, the complex impedance range defined by a minimum real impedance value, a maximum real impedance, a minimum imaginary impedance value, and a maximum imaginary impedance value, a ratio between the minimum and maximum real impedance value being at least two to one, a magnitude of the difference between the maximum and minimum imaginary impedance values being at least twice a magnitude of the difference between the minimum and maximum real impedance values; and a filter circuit electrically connected to the driver circuit and configured to modify the impedance of the transmit circuit to maintain the efficiency of the driver circuit at a level that is within 20% of a maximum efficiency of the driver circuit when the impedance is within the complex impedance range, the filter circuit further configured to maintain a substantially constant power output level irrespective of the reactive variations within the complex impedance range, and the filter circuit further configured to maintain a substantially linear relationship between the power output level and the resistive variations within the complex impedance range.