Self-adapting impedance matching module

Abstract

The invention discloses a self-adapting impedance matching module which comprises an adjustable matching unit and a main control unit. The matching module is characterized by also comprising a first power detector unit and a second power detector unit. The adjustable matching unit includes an adjustable matching network and a controllable power supply subunit. According to the matching module, through detecting a power parameter of a transmission signal, real-time matching adjustment is carried out on front and back stage circuits at two ends of the matching network, which means that a present radio frequency power measurement chip is utilized to detect the power magnitude of transmission signals at two ends of the adjustable matching unit, the power parameter is utilized to carry out self-adapting adjustment, and since the present detection chip can be employed to detect the power directly, detection precision is raised; in a detection process, participation of a directional coupler is not needed, thus the area of the module is reduced, a detected parameter can be directly utilized to carry out adjustment, subsequent complex parameter programming algorithm processing is saved, and the adjusting rate of the module is raised.

Description

technical field [0001] The invention belongs to the technical field of signal transmission control in a radio frequency wireless communication system, and in particular relates to the design of an adaptive impedance matching module. Background technique [0002] Impedance matching is an important part of microwave electronics. It is mainly used for signal or energy transmission, so that all microwave signals can be transmitted from the signal source to the load point, and no signal or energy will be reflected back, thereby improving transmission efficiency. That is, the purpose of matching is to ensure that the signal energy is effectively transmitted from the signal source to the load. [0003] In the practical application of the communication system, it is often encountered that various cascaded circuits cause impedance matching mismatch problems due to various factors. For example, in the receiving and sending of signals, the mobile phone often causes system matching due ...

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Problems solved by technology

The above-mentioned adaptive impedance matching schemes usually have the following problems: 1. The subsequent parameter processing requirements are relatively high, and complex parameter programming calculations are required, which is not conducive to the adjustment reaction rate of the adaptive impedance matching module; 2. It needs to be combined with a directional coupler 3. The acquisition of signals has high requirements on technology, which is not conducive to improving the detection accuracy of parameters

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