Kyocera International, Inc.

Yuh-Min Lin

James June-Ming Wang

Powei Chen

Jin-Fu Yeh

Radio Frequency (RF) circuit (amplifiers, mixer, etc.) design with RFIC, e.g., implemented in CMOS, CaAs, SiGe, or other silicon processes, suffers performance variations (gain phase, frequency, bandwidth, nonlinearity) due to wafer process variations, temperature changes, and supply voltage changes, and random variations. In this invention, methods are proposed to precisely calibrate the bias current of all active devices in the system, and to precisely calibrate the gain of individual path leading to each amplifiers such that the same Pout is achieved for all antenna elements in the system.

Phased-array antenna precision self-calibration

A power amplifier (PA) linearization technique with a wider linearized power range is proposed. Proposed two types of linearizers with cross-coupled PMOS and NMOS configuration. The idea is to use a complimentary device compared with the PA core device, and the behavior of Cgs of the linearizer are also complimentary to the PA itself. In the other words, the overall Cgs of the PA with the linearizer would be constant without leading to non-linear waveform. Both linearizers can effectively compensate not only AMAM but also AMPM. First type of linearizer can be integrated with PA cores, and second type of linearizer can be used in the IMN. Both linearizers have effective IM3 reduction in different corner.

Growing community of inventors

San Diego, CA, United States of America

Yuh-Min Lin