公开(公告)号：WO2012061244A1

公开(公告)日：2012-05-10

申请号：PCT/US2011/058384

申请日：2011-10-28

Applicant: CREE, INC.

Inventor： HARRIS, Christopher ,  PENGELLY, Raymond Sydney

IPC: H04B1/04 ,  H03H7/40 ,  H03F1/56

CPC classification number: H03H7/38 ,  H03F1/0288 ,  H03F1/56 ,  H03F3/24 ,  H03F2200/222 ,  H03F2200/378 ,  H03F2200/387 ,  H03H7/40 ,  H04B1/0458

Abstract: The present disclosure relates to transmission circuitry of a wireless communication device. The transmission circuitry includes power amplifier circuitry, an output matching network, and impedance control circuitry. The power amplifier circuitry amplifies a radio frequency (RF) input signal to provide an amplified RF output signal, which is passed through the output matching network and transmitted via one or more antennas. As the center frequency of the RF input signal and conditions of operating parameters change, the impedance control circuitry adjusts the values of one or more variable impedance elements of the output matching network in a desired fashion. The values of the variable impedance elements are adjusted such that the output matching network concurrently and dynamically presents the desired load impedances at the center frequency and at one or more harmonics of the RF input signal to achieve a given performance specification.

Abstract translation: 本公开涉及无线通信设备的传输电路。 传输电路包括功率放大器电路，输出匹配网络和阻抗控制电路。 功率放大器电路放大射频（RF）输入信号以提供放大的RF输出信号，其被输送通过输出匹配网络并通过一个或多个天线发送。 随着RF输入信号的中心频率和操作参数的条件改变，阻抗控制电路以期望的方式调整输出匹配网络的一个或多个可变阻抗元件的值。 调整可变阻抗元件的值，使得输出匹配网络同时并且动态地呈现在RF输入信号的中心频率和一个或多个谐波处的期望的负载阻抗，以实现给定的性能规范。